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    <title>WWW.EXFILE.COM, INC. -- 888-775-4789 -- PHASE FORWARD INCORPORATED -- FORM S-8</title>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">As
filed with the Securities and Exchange Commission on September&#160;5,
2008</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="right"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Registration
No.&#160;333-______</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">UNITED
STATES</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">SECURITIES
AND EXCHANGE COMMISSION</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">WASHINGTON,
DC 20549</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify">_________________</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">FORM&#160;S-8</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">REGISTRATION
STATEMENT</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">UNDER</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">THE
SECURITIES ACT OF 1933</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify">_________________</div><br></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 14pt; FONT-FAMILY: Times New Roman">Phase
Forward Incorporated</font></div>
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Name of Registrant as Specified in Its Charter)</font></div>
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Other Jurisdiction of Incorporation or Organization)</font></div>
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Employer Identification No.)</font></div>
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Winter Street</font></div>
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Massachusetts&#160; 02451</font></div>
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of Principal Executive Offices) (Zip Code)</font></div>
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Forward Incorporated Restricted Stock Unit Award Agreement</font></div>
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Title of the Plan)</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">
        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify">_________________</div>
      </div>
      <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><a name="FIS_UNIDENTIFIED_TABLE"><br></a></div>
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K. Weiler</font></div>
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and Chief Executive Officer</font></div>
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Forward Incorporated</font></div>
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Winter Street</font></div>
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Massachusetts&#160; 02451</font></div>
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Agent for Service)</font></div>
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703-1122</font></div>
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Number, Including Area Code, of Agent For Service.</font></div>
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        <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="justify">_________________</div>
      </div>
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    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Copies
to:</font></div>
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    <div align="center">
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      M. Mutkoski,&#160;Esq.</font></div>
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      </font></td>
            <td valign="top" width="49%">
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      Ari Buchler,&#160;Esq.</font></div>
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          <tr>
            <td valign="top" width="49%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Edward
      A. King,&#160;Esq.</font></div>
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          </tr>
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      </font></td>
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            </td>
          </tr>
          <tr>
            <td valign="top" width="49%">
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      State Street</font></div>
            </td>
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      </font></td>
            <td valign="top" width="49%">
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      Winter Street</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="49%">
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            </td>
            <td align="left" valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td valign="top" width="49%">
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      Massachusetts 02451</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="49%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(617)
      570-1000</font></div>
            </td>
            <td align="left" valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td valign="top" width="49%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(888)
      703-1122</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="49%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="2%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td valign="top" width="49%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div>
      <hr style="MARGIN-TOP: -5px; COLOR: #000000" noshade size="1">
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large accelerated filer, an accelerated filer, a non-accelerated filer, or a
smaller reporting company. See the definitions of &#8220;large accelerated filer,&#8221;
&#8220;accelerated filer&#8221; and &#8220;smaller reporting company&#8221; in Rule 12b2 of the Exchange
Act.</a></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">
    </div>
    <div>&#160;</div>
    <div align="center">
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          <tr>
            <td width="62%"><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Large accelerated
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OF REGISTRATION FEE <a name="A06_12116_1S8_HTM_CALCULATIONOFREGISTRAT" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div>
    <div>
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            <td valign="top" width="26%" style="BORDER-BOTTOM: black 2px solid">
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      </font></td>
            <td valign="top" width="12%" style="BORDER-BOTTOM: black 2px solid">
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Registered(1)</font></div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 1.8pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Proposed</font></div>
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            <td valign="top" width="10%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 1.8pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Amount&#160;</font></div>
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              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: -9pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;Common
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      </font></td>
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      </font></td>
            <td align="left" valign="top" width="5%">
              <div style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font>
      <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">18.97</font></div>
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      </font></td>
            <td align="left" valign="top" width="2%">
              <div style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font>
      <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">3,987,505.04</font></div>
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            <td align="right" valign="top" width="1%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%" style="TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">$</font>
      <font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">159.00</font></td>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="center">
      <table border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
          <tr valign="top">
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              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(1)</font></div>
            </td>
            <td>
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">In
      addition, pursuant to Rule&#160;416(a), this Registration Statement also
      covers such indeterminate number of additional shares of Common Stock as
      is necessary to eliminate any dilutive effect of any future stock split,
      stock dividend or similar
transaction.</font></div>
            </td>
          </tr>
      </table>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="center">
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              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">      </font>
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              </div>
            </td>
            <td>
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">The
      price of $18.97 per share, which is the average of the high and low prices
      of the common stock as reported on the NASDAQ Global Market on September
      4, 2008, is set forth solely for purposes of calculating the filing fee
      pursuant to Rules&#160;457(c)&#160;and
(h).</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div align="center">
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          <tr valign="top">
            <td valign="top" style="WIDTH: 20pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">      </font>
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              </div>
            </td>
            <td>
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Calculated
      pursuant to Section&#160;6(b)&#160;of the Securities Act of 1933, as
      amended (the &#8220;<font style="DISPLAY: inline; TEXT-DECORATION: underline">Securities
      Act</font>&#8221;).</font></div>
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          </tr>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><br></div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
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        <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
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</font></div>
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        </div>
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        <div id="GLHDR" style="WIDTH: 100%" align="right"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
      </div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: center" align="left"><a name="FIS_PART_I"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">PART&#160;I
</font></a></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">INFORMATION
REQUIRED IN THE SECTION&#160;10(a)&#160;PROSPECTUS <a name="FIS_PLAN_INFORMATION" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
1.&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Plan
Information</font>. <a name="A06_12116_1S8_HTM_ITEM1_PLANINFORMATION_" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
documents containing the information specified in this Item 1 will be sent or
given to employees, directors or others as specified by Rule&#160;428(b)(1). In
accordance with the rules&#160;and regulations of the Securities and Exchange
Commission (the &#8220; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Commission</font> &#8221;) and the
instructions to Form&#160;S-8, such documents are not being filed with the
Commission either as part of this Registration Statement or as prospectuses or
prospectus supplements pursuant to Rule&#160;424.<a name="FIS_REGISTRANT_INFORMATION" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
2.&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Registrant Information and
Employee Plan Annual Information</font>. <a name="A06_12116_1S8_HTM_ITEM2_REGISTRANTINFORM" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
documents containing the information specified in this Item 2 will be sent or
given to employees, directors or others as specified by Rule&#160;428(b). In
accordance with the rules&#160;and regulations of the Commission and the
instructions to Form&#160;S-8, such documents are not being filed with the
Commission either as part of this Registration Statement or as prospectuses or
prospectus supplements pursuant to Rule&#160;424.<a name="FIS_PART_II" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">PART&#160;II
<a name="A06_12116_1S8_HTM_PARTII_222646" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">INFORMATION
REQUIRED IN THE REGISTRATION STATEMENT <a name="A06_12116_1S8_HTM_INFORMATIONREQUIREDINT" /><a name="FIS_DOCUMENTS_BY_REFERENCE" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">REGISTRATION
OF ADDITIONAL SECURITIES</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">This
registration statement relates to 210,256 shares of Common Stock, par value $.01
per share, reserved for issuance under the Phase Forward Incorporated Restricted
Stock Unit Award Agreements (the &#8220;<font style="DISPLAY: inline; TEXT-DECORATION: underline">Grants</font>&#8221;).&#160;&#160;Such
Grants are being issued in connection with the acquisition of Clarix LLC,
pursuant to the Unit Purchase Agreement by and among Clarix LLC, the Selling
Interest Holders listed therein and Phase Forward Incorporated dated as of
September 5, 2008 as performance inducements for certain employees.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
3.&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Incorporation of Documents
by Reference</font>. <a name="A06_12116_1S8_HTM_ITEM3_INCORPORATIONOFD" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
following documents filed with the Commission are incorporated by reference in
this Registration Statement:<a name="FIS_UNIDENTIFIED_TABLE_3" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
          <tr valign="top">
            <td style="WIDTH: 36pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;
      </font></div>
            </td>
            <td>
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(a)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;Annual Report on Form&#160;10-K
      for the fiscal year ended December&#160;31,
  2007;</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
          <tr valign="top">
            <td style="WIDTH: 36pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;
      </font></div>
            </td>
            <td>
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(b)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;All other documents filed by the
      Company pursuant to 13(a)&#160;or 15(d)&#160;of the Exchange Act since the
      end of the fiscal year covered by the document referred to in
      (a)&#160;above; and</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
      <table align="center" border="0" cellpadding="0" cellspacing="0" id="hangingindent" width="100%">
          <tr valign="top">
            <td style="WIDTH: 36pt">
              <div><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">&#160;
      </font></div>
            </td>
            <td>
              <div align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)
      &#160;&#160;&#160;&#160;&#160;&#160;&#160;The section entitled
      &#8220;Description of Registrant&#8217;s Securities to be Registered&#8221; contained in the
      Registrant&#8217;s Registration Statement on Form&#160;8-A, filed pursuant to
      Section&#160;12(g)&#160;of the Securities Exchange Act of 1934, as amended
      (the &#8220; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Exchange
      Act</font> &#8221;), on July&#160;9,
2004.</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">All
documents subsequently filed with the Commission by the Registrant pursuant to
Sections 13(a), 13(c), 14 and 15(d)&#160;of the Exchange Act, on or after the
date of this Registration Statement and prior to the filing of a post-effective
amendment to this Registration Statement which indicates that all securities
offered herein have been sold or which deregisters all securities then remaining
unsold, shall be </font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
        </div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
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    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">deemed to
be incorporated by reference in this Registration Statement and to be a part
thereof from the date of filing of such documents.<a name="eolPage3">&#160;</a><a name="FIS_SECURITIES_DESCRIPTION" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
4.&#160;&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Description of
Securities</font>. <a name="A06_12116_1S8_HTM_ITEM4_DESCRIPTIONOFSEC" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Not
applicable.<a name="FIS_EXPERTS" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
5.&#160;&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Interests of Named Experts
and Counsel</font>. <a name="A06_12116_1S8_HTM_ITEM5_INTERESTSOFNAMED" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Not
applicable.<a name="FIS_INDEMNIFICATION" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
6.&#160;&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Indemnification of Directors
and Officers</font>. <a name="A06_12116_1S8_HTM_ITEM6_INDEMNIFICATIONO" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
Delaware General Corporation Law and the Registrant&#8217;s charter and bylaws provide
for indemnification of the Registrant&#8217;s directors and officers for liabilities
and expenses that they may incur in such capacities. In general, the Registrant
will indemnify its directors and officers with respect to actions taken by them
in good faith in a manner reasonably believed to be in, or not opposed to, the
Registrant&#8217;s best interests and, with respect to any criminal action or
proceeding, actions that the indemnitee had no reasonable cause to believe were
unlawful.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
Registrant is party to certain underwriting agreements which provide that the
underwriters are obligated, under certain circumstances, to indemnify the
Registrant&#8217;s directors, officers and controlling persons against certain
liabilities, including liabilities under the Securities Act. Reference is made
to the form of Underwriting Agreement filed as Exhibit&#160;1.1 to the
Registrant&#8217;s Registration Statement on Form&#160;S-1 (File No.&#160;333-113594)
and the form of Underwriting Agreement filed as Exhibit&#160;1.1 to the
Registrant&#8217;s Current Report on Form&#160;8-K filed with the Commission on May
22, 2007.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The
Registrant has entered into agreements with certain of its officers and
directors that also provide for such indemnification and expenses and liability
reimbursement. These agreements require the Registrant to indemnify such persons
against liabilities that may arise by reason of their status or service as
officers and directors and to advance their expenses incurred as a result of any
proceeding against them as to which they could be indemnified.<a name="FIS_EXEMPTION_FROM_REGISTRATION" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
7.&#160;&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Exemption From Registration
Claimed</font>. <a name="A06_12116_1S8_HTM_ITEM7_EXEMPTIONFROMREG" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Not
applicable.<a name="FIS_EXHIBITS" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
8.&#160;&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Exhibits</font>.
</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left">&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">
          <tr>
            <td valign="top" width="7%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Exhibit&#160;No.</font></div>
            </td>
            <td valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td valign="top" width="71%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="center"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Description
      of Exhibit</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="7%">
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">5.1+</font></div>
            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="71%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Opinion
      of Goodwin Procter LLP</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="7%">
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">23.1+</font></div>
            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="71%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Consent
      of Ernst&#160;&amp; Young LLP</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="7%">
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">23.2</font></div>
            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="71%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Consent
      of Goodwin Procter LLP (included in Exhibit&#160;5.1)</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="7%">
              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">24.1</font></div>
            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="71%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Power
      of Attorney (included as part of the signature page&#160;of this
      Registration Statement)</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="7%">

              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">99.1
      +</font>&#160;</div>
            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            <td align="left" valign="top" width="71%">

              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Form
      of Phase Forward Incorporated Restricted Stock <font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Unit Award
      Agreement</font></font><font style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;for Clarix
      Founders</font></div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="7%">

              <div style="DISPLAY: block; MARGIN-LEFT: 9pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">99.2
      +</font>&#160;&#160;</div>
            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            <td align="left" valign="top" width="71%">

              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Form
      of Phase Forward Incorporated Restricted Stock Unit Award Agreement</font>
      for Clarix Employees</font></div>
            </td>
          </tr>
      </table>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><a name="eolPage4" /><a name="FIS_UNIDENTIFIED_TABLE_5">+ &#160;filed
herewith</a></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
        </div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
        </div>
      </div>
    </div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Item
9.&#160;&#160;&#160; <font style="DISPLAY: inline; TEXT-DECORATION: underline">Undertakings.</font> <a name="A06_12116_1S8_HTM_ITEM9_UNDERTAKINGS__22" /></font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(a)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
The undersigned Registrant hereby undertakes:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(1)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 108pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(i)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
To include any prospectus required by Section&#160;10(a)(3)&#160;of the
Securities Act of 1933;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 108pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(ii)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
To reflect in the prospectus any facts or events arising after the effective
date of the Registration Statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change
in the information set forth in the Registration Statement. Notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the
total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high end of the estimated maximum
offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule&#160;424(b)&#160;if, in the aggregate, the changes
in volume and price represent no more than 20 percent change in the maximum
aggregate offering price set forth in the &#8220;Calculation of Registration Fee&#8221;
table in the effective Registration Statement;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 108pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(iii)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
To include any material information with respect to the plan of distribution not
previously disclosed in the Registration Statement or any material change to
such information in the Registration Statement;</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman"><font style="DISPLAY: inline; FONT-STYLE: italic">provided</font> , <font style="DISPLAY: inline; FONT-STYLE: italic">however</font> , that paragraphs
(a)(1)(i)&#160;and (a)(1)(ii)&#160;do not apply if the Registration Statement is
on Form&#160;S-8, and the information required to be included in a
post-effective amendment by those paragraphs is contained in reports filed with
or furnished to the Commission by the Registrant pursuant to Section&#160;13 or
15(d)&#160;of the Securities Exchange Act of 1934 that are incorporated by
reference in the Registration Statement or is contained in a form of prospectus
filed pursuant to Rule 424(b) that is part of the Registration
Statement.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(2)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
That, for the purpose of determining any liability under the Securities Act of
1933, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial <font style="DISPLAY: inline; FONT-STYLE: italic">bona fide</font> offering thereof.<a name="eolPage5" /></font></div>
    <div style="DISPLAY: block; TEXT-INDENT: 0pt">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 72pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 6pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(3)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
To remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the
offering.</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: left" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(b)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
The undersigned Registrant hereby undertakes, that, for purposes of determining
any liability under the Securities Act of 1933, each filing of the Registrant&#8217;s
annual report pursuant to Section&#160;13(a)&#160;or Section&#160;15(d)&#160;of
the Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan&#8217;s annual report pursuant to Section&#160;15(d)&#160;of the
Securities Exchange Act of 1934) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial <font style="DISPLAY: inline; FONT-STYLE: italic">bona fide</font> offering
thereof.</font></div>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left">
        </div>
      </div>
      <div id="PN" style="PAGE-BREAK-AFTER: always">
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
        </div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
          <hr style="COLOR: black" noshade size="2">
        </div>
      </div>
      <div id="HDR">
        <div id="GLHDR" style="WIDTH: 100%" align="right">
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    <div style="DISPLAY: block; MARGIN-LEFT: 36pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt; TEXT-ALIGN: justify" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">(c)&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;
&#160;Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.<a name="eolPage6" /></font></div><br>
    <div id="PGBRK" style="MARGIN-LEFT: 0pt; WIDTH: 100%; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt">
      <div id="FTR">
        <div id="GLFTR" style="WIDTH: 100%" align="left"><font style="DISPLAY: inline; FONT-SIZE: 8pt; COLOR: #000000; FONT-FAMILY: Times New Roman">&#160;
</font></div>
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        <div style="WIDTH: 100%; TEXT-ALIGN: center"><font style="DISPLAY: inline; FONT-SIZE: 8pt; FONT-FAMILY: Times New Roman">&#160;
</font></div>
        <div style="WIDTH: 100%; TEXT-ALIGN: center">
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        </div>
      </div>
      <div id="HDR">
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</font></div>
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    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 27pt; MARGIN-RIGHT: 0pt"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Pursuant
to the requirements of the Securities Act of 1933, the Registrant certifies that
it has reasonable grounds to believe that it meets all of the requirements for
filing on Form&#160;S-8 and has duly caused this Registration Statement to be
signed on its behalf by the undersigned, thereunto duly authorized, in the City
of Waltham, Commonwealth of Massachusetts, on September&#160;4,
2008.</font><br>&#160;</div>
    <div>
      <table cellpadding="0" cellspacing="0" width="100%">
          <tr>
            <td valign="top" width="37%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" colspan="2" valign="top" width="39%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-WEIGHT: bold; FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-VARIANT: small-caps">Phase
      Forward Incorporated</font></div>
            </td>
          </tr>
          <tr>
            <td valign="top" width="37%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
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          <tr>
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      </font></td>
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    </div>
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OF ATTORNEY AND SIGNATURES <a name="A06_12116_1S8_HTM_POWEROFATTORNEYANDSIGN" /></font></div>
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undersigned officers and directors of Phase Forward Incorporated, hereby
severally constitute and appoint Robert K. Weiler and Rodger Weismann, and each
of them singly, our true and lawful attorneys, with full power to them and each
of them singly, to sign for us in our names in the capacities indicated below,
all pre-effective and post-effective amendments to this Registration Statement
and any related subsequent registration statement pursuant to
Rule&#160;462(b)&#160;of the Securities Act of 1933, as amended, and generally
to do all things in our names and on our behalf in such capacities to enable
Phase Forward Incorporated to comply with the provisions of the Securities Act
of 1933, as amended, and all requirements of the Securities and Exchange
Commission.</font></div>
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to the requirements of the Securities Act of 1933, this Registration Statement
has been signed by the following persons in the capacities and on the dates
indicated below:</font></div>
    <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify">&#160;</div>
    <div>
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          <tr>
            <td valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid">
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            <td valign="top" width="13%" style="BORDER-BOTTOM: black 2px solid">
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          <tr>
            <td align="left" valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;</font></td>
          </tr>
          <tr>
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      Robert K. Weiler</font></div>
            </td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%">
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      Chief Executive Officer and Director</font></div>
            </td>
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      </font></td>
            <td align="left" valign="top" width="13%">
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            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
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            <td align="left" valign="top" width="31%">
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            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
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          <tr>
            <td align="left" valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid">
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      Rodger Weismann</font></div>
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      </font></td>
            <td align="left" valign="top" width="31%">
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            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">September&#160;4,
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            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Rodger
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            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">(Principal
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            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid">
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            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%">
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            </td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">September&#160;4,
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            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Paul
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            </td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">/s/
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            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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            <td align="left" valign="top" width="31%">
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            <td align="left" valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">September&#160;4,
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            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">Axel
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            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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          </tr>
          <tr>
            <td align="left" valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left">&#160;</div>
            </td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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            <td align="left" valign="top" width="31%">
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            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left">&#160;</div>
            </td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%">
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            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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          </tr>
          <tr>
            <td align="left" valign="top" width="25%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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            <td align="left" valign="top" width="31%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="3%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
            <td align="left" valign="top" width="13%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
      </font></td>
          </tr>
          <tr>
            <td align="left" valign="top" width="25%" style="BORDER-BOTTOM: black 2px solid">
              <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0.8pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">/s/
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            <td align="left" valign="top" width="4%"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">&#160;
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    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
    <div>&#160;</div>
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{"company-data": {"conformed-name": "PHASE FORWARD INC", "cik": "0001050180", "assigned-sic": "7389", "irs-number": "043386549", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-153335", "film-number": "081058016"}, "business-address": {"street1": "880 WINTER STREET", "city": "WALTHAM", "state": "MA", "zip": "02451"}}
WWW.EXFILE.COM, INC. -- 888-775-4789 -- PHASE FORWARD INCORPORATED -- FORM S-8
As
filed with the Securities and Exchange Commission on September 5,
2008
Registration
No. 333-______
UNITED
STATES
SECURITIES
AND EXCHANGE COMMISSION
WASHINGTON,
DC 20549
_________________
FORM S-8
REGISTRATION
STATEMENT
UNDER
THE
SECURITIES ACT OF 1933
_________________
Phase
Forward Incorporated
(Exact
Name of Registrant as Specified in Its Charter)
Delaware
(State or
Other Jurisdiction of Incorporation or Organization)
04-3386549
(I.R.S.
Employer Identification No.)
880
Winter Street
Waltham,
Massachusetts  02451
(Address
of Principal Executive Offices) (Zip Code)
Phase
Forward Incorporated Restricted Stock Unit Award Agreement
(Full
Title of the Plan)
_________________
Robert
K. Weiler
President
and Chief Executive Officer
Phase
Forward Incorporated
880
Winter Street
Waltham,
Massachusetts  02451
(Name and Address of
Agent for Service)
(888)
703-1122
Telephone
Number, Including Area Code, of Agent For Service.
_________________
Copies
to:
John
      M. Mutkoski, Esq.
D.
      Ari Buchler, Esq.
Edward
      A. King, Esq.
Senior
      Vice President, General Counsel and Secretary
Goodwin
      Procter LLP
Phase
      Forward Incorporated
53
      State Street
880
      Winter Street
Boston,
      Massachusetts 02109
Waltham,
      Massachusetts 02451
(617)
      570-1000
(888)
      703-1122
Indicate by check mark whether the registrant is a
large accelerated filer, an accelerated filer, a non-accelerated filer, or a
smaller reporting company. See the definitions of "large accelerated filer,"
"accelerated filer" and "smaller reporting company" in Rule 12b2 of the Exchange
Act.
Large accelerated
      filer  [    ]
Accelerated
      filer  [X]
Non-accelerated
      filer  [    ]  (Do not check if a
      smaller reporting company)
Smaller reporting
      company  [    ]
CALCULATION
OF REGISTRATION FEE
Title of Each Class of Securities
To Be Registered
Amount
To Be
Registered(1)
Proposed
Maximum
Offering Price
Per Share(2)
Proposed
Maximum
Aggregate
Offering Price(2)
Amount
of
Registration
Fee(3)
Phase
      Forward Incorporated Restricted Stock Unit Award Agreement
Common
      Stock (par value $.01 per share)
210,256
$
18.97
$
3,987,505.04
$
159.00
(1)
In
      addition, pursuant to Rule 416(a), this Registration Statement also
      covers such indeterminate number of additional shares of Common Stock as
      is necessary to eliminate any dilutive effect of any future stock split,
      stock dividend or similar
transaction.
(2)
The
      price of $18.97 per share, which is the average of the high and low prices
      of the common stock as reported on the NASDAQ Global Market on September
      4, 2008, is set forth solely for purposes of calculating the filing fee
      pursuant to Rules 457(c) and
(h).
(3)
Calculated
      pursuant to Section 6(b) of the Securities Act of 1933, as
      amended (the "
Securities
      Act
").
PART I
INFORMATION
REQUIRED IN THE SECTION 10(a) PROSPECTUS
Item
1.
Plan
Information
.
The
documents containing the information specified in this Item 1 will be sent or
given to employees, directors or others as specified by Rule 428(b)(1). In
accordance with the rules and regulations of the Securities and Exchange
Commission (the "
Commission
") and the
instructions to Form S-8, such documents are not being filed with the
Commission either as part of this Registration Statement or as prospectuses or
prospectus supplements pursuant to Rule 424.
Item
2.
Registrant Information and
Employee Plan Annual Information
.
The
documents containing the information specified in this Item 2 will be sent or
given to employees, directors or others as specified by Rule 428(b). In
accordance with the rules and regulations of the Commission and the
instructions to Form S-8, such documents are not being filed with the
Commission either as part of this Registration Statement or as prospectuses or
prospectus supplements pursuant to Rule 424.
PART II
INFORMATION
REQUIRED IN THE REGISTRATION STATEMENT
REGISTRATION
OF ADDITIONAL SECURITIES
This
registration statement relates to 210,256 shares of Common Stock, par value $.01
per share, reserved for issuance under the Phase Forward Incorporated Restricted
Stock Unit Award Agreements (the "
Grants
").  Such
Grants are being issued in connection with the acquisition of Clarix LLC,
pursuant to the Unit Purchase Agreement by and among Clarix LLC, the Selling
Interest Holders listed therein and Phase Forward Incorporated dated as of
September 5, 2008 as performance inducements for certain employees.
Item
3.
Incorporation of Documents
by Reference
.
The
following documents filed with the Commission are incorporated by reference in
this Registration Statement:
(a)
             Annual Report on Form 10-K
      for the fiscal year ended December 31,
  2007;
(b)
             All other documents filed by the
      Company pursuant to 13(a) or 15(d) of the Exchange Act since the
      end of the fiscal year covered by the document referred to in
      (a) above; and
(c)
             The section entitled
      "Description of Registrant's Securities to be Registered" contained in the
      Registrant's Registration Statement on Form 8-A, filed pursuant to
      Section 12(g) of the Securities Exchange Act of 1934, as amended
      (the "
Exchange
      Act
"), on July 9,
2004.
All
documents subsequently filed with the Commission by the Registrant pursuant to
Sections 13(a), 13(c), 14 and 15(d) of the Exchange Act, on or after the
date of this Registration Statement and prior to the filing of a post-effective
amendment to this Registration Statement which indicates that all securities
offered herein have been sold or which deregisters all securities then remaining
unsold, shall be
deemed to
be incorporated by reference in this Registration Statement and to be a part
thereof from the date of filing of such documents.
Item
4.
Description of
Securities
.
Not
applicable.
Item
5.
Interests of Named Experts
and Counsel
.
Not
applicable.
Item
6.
Indemnification of Directors
and Officers
.
The
Delaware General Corporation Law and the Registrant's charter and bylaws provide
for indemnification of the Registrant's directors and officers for liabilities
and expenses that they may incur in such capacities. In general, the Registrant
will indemnify its directors and officers with respect to actions taken by them
in good faith in a manner reasonably believed to be in, or not opposed to, the
Registrant's best interests and, with respect to any criminal action or
proceeding, actions that the indemnitee had no reasonable cause to believe were
unlawful.
The
Registrant is party to certain underwriting agreements which provide that the
underwriters are obligated, under certain circumstances, to indemnify the
Registrant's directors, officers and controlling persons against certain
liabilities, including liabilities under the Securities Act. Reference is made
to the form of Underwriting Agreement filed as Exhibit 1.1 to the
Registrant's Registration Statement on Form S-1 (File No. 333-113594)
and the form of Underwriting Agreement filed as Exhibit 1.1 to the
Registrant's Current Report on Form 8-K filed with the Commission on May
22, 2007.
The
Registrant has entered into agreements with certain of its officers and
directors that also provide for such indemnification and expenses and liability
reimbursement. These agreements require the Registrant to indemnify such persons
against liabilities that may arise by reason of their status or service as
officers and directors and to advance their expenses incurred as a result of any
proceeding against them as to which they could be indemnified.
Item
7.
Exemption From Registration
Claimed
.
Not
applicable.
Item
8.
Exhibits
.
Exhibit No.
Description
      of Exhibit
5.1+
Opinion
      of Goodwin Procter LLP
23.1+
Consent
      of Ernst & Young LLP
23.2
Consent
      of Goodwin Procter LLP (included in Exhibit 5.1)
24.1
Power
      of Attorney (included as part of the signature page of this
      Registration Statement)
99.1
      +
Form
      of Phase Forward Incorporated Restricted Stock
Unit Award
      Agreement
for Clarix
      Founders
99.2
      +
Form
      of Phase Forward Incorporated Restricted Stock Unit Award Agreement
for Clarix Employees
+  filed
herewith
Item
9.
Undertakings.
(a)          
The undersigned Registrant hereby undertakes:
(1)          
To file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement:
(i)           
To include any prospectus required by Section 10(a)(3) of the
Securities Act of 1933;
(ii)          
To reflect in the prospectus any facts or events arising after the effective
date of the Registration Statement (or the most recent post-effective amendment
thereof) which, individually or in the aggregate, represent a fundamental change
in the information set forth in the Registration Statement. Notwithstanding the
foregoing, any increase or decrease in volume of securities offered (if the
total dollar value of securities offered would not exceed that which was
registered) and any deviation from the low or high end of the estimated maximum
offering range may be reflected in the form of prospectus filed with the
Commission pursuant to Rule 424(b) if, in the aggregate, the changes
in volume and price represent no more than 20 percent change in the maximum
aggregate offering price set forth in the "Calculation of Registration Fee"
table in the effective Registration Statement;
(iii)         
To include any material information with respect to the plan of distribution not
previously disclosed in the Registration Statement or any material change to
such information in the Registration Statement;
provided
,
however
, that paragraphs
(a)(1)(i) and (a)(1)(ii) do not apply if the Registration Statement is
on Form S-8, and the information required to be included in a
post-effective amendment by those paragraphs is contained in reports filed with
or furnished to the Commission by the Registrant pursuant to Section 13 or
15(d) of the Securities Exchange Act of 1934 that are incorporated by
reference in the Registration Statement or is contained in a form of prospectus
filed pursuant to Rule 424(b) that is part of the Registration
Statement.
(2)          
That, for the purpose of determining any liability under the Securities Act of
1933, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the
offering of such securities at that time shall be deemed to be the initial
bona fide
offering thereof.
(3)          
To remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the
offering.
(b)          
The undersigned Registrant hereby undertakes, that, for purposes of determining
any liability under the Securities Act of 1933, each filing of the Registrant's
annual report pursuant to Section 13(a) or Section 15(d) of
the Securities Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
Registration Statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial
bona fide
offering
thereof.
(c)          
 Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors, officers and controlling persons of
the Registrant pursuant to the foregoing provisions, or otherwise, the
Registrant has been advised that in the opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore, unenforceable. In the event that a claim for indemnification
against such liabilities (other than the payment by the Registrant of expenses
incurred or paid by a director, officer or controlling person of the Registrant
in the successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.
Pursuant
to the requirements of the Securities Act of 1933, the Registrant certifies that
it has reasonable grounds to believe that it meets all of the requirements for
filing on Form S-8 and has duly caused this Registration Statement to be
signed on its behalf by the undersigned, thereunto duly authorized, in the City
of Waltham, Commonwealth of Massachusetts, on September 4,
2008.
Phase
      Forward Incorporated
By:
/s/ Robert
      K. Weiler
Robert
      K. Weiler
Chief
      Executive Officer
(Duly
      authorized officer)
POWER
OF ATTORNEY AND SIGNATURES
We, the
undersigned officers and directors of Phase Forward Incorporated, hereby
severally constitute and appoint Robert K. Weiler and Rodger Weismann, and each
of them singly, our true and lawful attorneys, with full power to them and each
of them singly, to sign for us in our names in the capacities indicated below,
all pre-effective and post-effective amendments to this Registration Statement
and any related subsequent registration statement pursuant to
Rule 462(b) of the Securities Act of 1933, as amended, and generally
to do all things in our names and on our behalf in such capacities to enable
Phase Forward Incorporated to comply with the provisions of the Securities Act
of 1933, as amended, and all requirements of the Securities and Exchange
Commission.
Pursuant
to the requirements of the Securities Act of 1933, this Registration Statement
has been signed by the following persons in the capacities and on the dates
indicated below:
SIGNATURE
TITLE
DATE
/s/
      Robert K. Weiler
President,
      Chief Executive Officer and Director
September 4,
      2008
Robert
      K. Weiler
(Principal
      Executive Officer)
/s/
      Rodger Weismann
Sr.
      Vice President, Chief Financial Officer, and Treasurer
September 4,
      2008
Rodger
      Weismann
(Principal
      Accounting and Financial Officer)
/s/
      Paul A. Bleicher, M.D., Ph.D
Chairman
      of the Board and Chief Strategy Officer
September 4,
      2008
Paul
      A. Bleicher, M.D., Ph.D
/s/
      Axel Bichara
Director
September 4,
      2008
Axel
      Bichara
Director
James
      I. Cash, Jr., Ph.D
/s/
      Richard A. D'Amore
Director
September 4,
      2008
Richard
      A. D'Amore
/s/
      Gary E. Haroian
Director
September 4,
      2008
Gary
      E. Haroian
/s/
      Dennis R. Shaughnessy
Director
September 4,
      2008
Dennis
      R. Shaughnessy
/s/  Kenneth I. Kaitin, Ph.D.
Director
September 4,
      2008
Kenneth I. Kaitin, Ph.D.
INDEX
TO EXHIBITS
Exhibit No.
Description
      of Exhibit
5.1+
Opinion
      of Goodwin Procter LLP
23.1+
Consent
      of Ernst & Young LLP
23.2
Consent
      of Goodwin Procter LLP (included in Exhibit 5.1)
24.1
Power
      of Attorney (included as part of the signature page of this
      Registration Statement)
99.1+
Form
      of Phase Forward Incorporated Restricted Stock Unit Award Agreement for
      Clarix Founders
99.2+
Form
      of Phase Forward Incorporated Restricted Stock Unit Award Agreement for
      Clarix Employees
+
      filed herewith