<PAGE>   1

      As filed with the Securities and Exchange Commission on June 26, 2000

                                                   Registration No. 333-

--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                            BROADBASE SOFTWARE, INC.
           (Exact name of the Registrant as specified in its charter)

                  DELAWARE                                 77-0408319
       (State or other jurisdiction of                  (I.R.S. employer
       incorporation or organization)                  identification no.)

                             181 CONSTITUTION DRIVE
                          MENLO PARK, CALIFORNIA 94025
                    (Address of principal executive offices)

         OPTIONS AND PURCHASE RIGHTS ISSUED UNDER THE APERIO, INC. 1998
           INCENTIVE AND NONQUALIFIED STOCK OPTION PLAN AND ASSUMED BY
          THE REGISTRANT IN CONNECTION WITH ITS ACQUISITION OF APERIO.

           STOCK OPTION AGREEMENTS WITH DAVID MILAM AND WILLIAM WOLFE
                            (Full title of the plans)

                                  RUSTY THOMAS
              EXECUTIVE VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
                             181 CONSTITUTION DRIVE
                          MENLO PARK, CALIFORNIA 94025
                                 (650) 614-8300
            (Name, address and telephone number of agent for service)

                                   Copies to:
                             DAVID K. MICHAELS, ESQ.
                              THOMAS J. HALL, ESQ.
                               FENWICK & WEST LLP
                              TWO PALO ALTO SQUARE
                           PALO ALTO, CALIFORNIA 94306

                             CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
====================================================================================================
                                                   PROPOSED          PROPOSED
                                   AMOUNT          MAXIMUM           MAXIMUM
       TITLE OF SHARES              TO BE         AGGREGATE         AGGREGATE         AMOUNT OF
       TO BE REGISTERED          REGISTERED    PRICE PER SHARE    OFFERING PRICE   REGISTRATION FEE
====================================================================================================
<S>                              <C>           <C>                <C>              <C>
Common Stock,
$0.001 par value per share       118,666(1)     $0.348360(3)       $   41,339(4)        $   11(4)
====================================================================================================
Common Stock,
$0.001 par value per share       600,000(2)     $ 14.5156(3)       $8,709,360(4)        $2,300(4)
====================================================================================================
</TABLE>

(1)  Represents shares reserved for issuance upon the exercise of options
     granted under the Aperio 1998 Incentive and Nonqualified Stock Option Plan.


<PAGE>   2

(2)  Represents shares reserved for issuance pursuant to the exercise of options
     granted pursuant to stock option agreements with David Milam and William
     Wolfe.

(3)  Weighted average per share exercise price for these outstanding options.

(4)  Calculated based on the weighted average per share exercise price, pursuant
     to Rule 457(h)(1) under the Securities Act of 1933, as amended (the
     "Securities Act").


<PAGE>   3


           PART II: INFORMATION REQUIRED IN THE REGISTRATION STATEMENT


ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE.

        The following documents filed with the Securities and Exchange
Commission (the "Commission") are incorporated into this registration statement
by reference:

        (a)    our most recent annual report on Form 10-K filed with the
               Commission;

        (b)    all other reports filed pursuant to Section 13(a) or 15(d) of the
               Securities Exchange Act of 1934, as amended (the "Exchange Act")
               since the end of the fiscal year covered by the document referred
               to in (a) above; and

        (c)    the description of our common stock contained in our registration
               statement on Form 8-A filed under Section 12(g) of the Exchange
               Act, including any amendment or report filed for the purpose of
               updating such description.

        All documents subsequently filed by us pursuant to Sections 13(a),
13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a post-effective
amendment which indicates that all securities registered hereby have been sold
or which deregisters all securities then remaining unsold, shall be deemed to be
incorporated by reference herein and to be a part hereof from the date of the
filing of such documents.

ITEM 4. DESCRIPTION OF SECURITIES.

        Not applicable.

ITEM 5. INTERESTS OF NAMED EXPERTS AND COUNSEL.

        Certain partners and investment partnerships comprised of certain
partners of Fenwick & West LLP, our counsel, own 64,758 shares of our common
stock.

ITEM 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

        Section 145 of the Delaware General Corporation Law authorizes a court
to award, or a corporation's board of directors to grant, indemnity to directors
and executive officers in terms sufficiently broad to permit such
indemnification under certain circumstances for liabilities, including
reimbursement for expenses incurred arising under the Securities Act.

        As permitted by the Delaware General Corporation Law, our certificate of
incorporation, as amended, includes a provision that eliminates the personal
liability of its directors for monetary damages for breach of fiduciary duty as
a director, except for liability:

        -  for any breach of the director's duty of loyalty to us or our
           stockholders;

        -  for acts or omissions not in good faith or that involve intentional
           misconduct or a knowing violation of law;

        -  under Section 174 of the Delaware General Corporation Law (regarding
           unlawful dividends and stock purchases); or

        -  for any transaction from which the director derived an improper
           personal benefit.


                                      II-1
<PAGE>   4


        As permitted by the Delaware General Corporation Law, our bylaws provide
that:

        -  we are required to indemnify our directors and executive officers to
           the fullest extent permitted by the Delaware General Corporation Law,
           subject to limited exceptions;

        -  we may indemnify our other employees and agents as set forth in the
           Delaware General Corporation Law;

        -  we are required to advance expenses, as incurred, to our directors
           and officers in connection with a legal proceeding to the fullest
           extent permitted by the Delaware General Corporation Law, subject to
           limited exceptions; and

        -  the rights conferred in the bylaws are not exclusive.

        We entered into indemnity agreements with each of our current directors
and executive officers to give such directors and executive officers additional
contractual assurances regarding the scope of the indemnification set forth in
our certificate of incorporation and to provide additional procedural
protections. The indemnification provisions in our certificate of incorporation,
bylaws and the indemnity agreements may be sufficiently broad to permit
indemnification of our directors and executive officers for liabilities arising
under the Securities Act.

        We entered into underwriting agreements with investment banks and
certain of our stockholders in connection with our initial public offering and
secondary public offering pursuant to which the underwriters agreed to indemnify
us, our directors and executive officers against certain liabilities, including
liabilities arising under the Securities Act. Likewise, pursuant to our Fourth
Amended and Restated Investors' Rights Agreement, stockholders exercising rights
pursuant to this agreement have agreed to indemnify us, our directors and our
officers who sign the registration statement against certain liabilities
including liabilities arising under the Securities Act.

        We have also obtained directors' and officers' liability insurance that
will include coverage for securities matters. At present, there is no pending
litigation or proceeding involving any of our directors, officers or employees
regarding which indemnification is sought, nor are we aware of any threatened
litigation that may result in claims for indemnification.

        See also the undertakings set out in response to Item 9.

        Reference is made to the following documents regarding relevant
indemnification provisions described above and elsewhere herein:

DOCUMENT

Certificate of Incorporation and amendments (see Exhibits 4.01-4.04).

Bylaws (see Exhibit 4.05).

Form of Indemnity Agreement (incorporated by reference to Exhibit 10.01 to our
registration statement on Form S-1 (File No. 333-82251) filed with the
Commission on July 2, 1999, as subsequently amended).

ITEM 7. EXEMPTION FROM REGISTRATION CLAIMED.

        Not applicable.


                                      II-2
<PAGE>   5


ITEM 8. EXHIBITS.

<TABLE>
<CAPTION>
                                                                      INCORPORATED BY REFERENCE
EXHIBIT                                                               -------------------------            FILED
NUMBER                EXHIBIT DESCRIPTION                      FORM   FILE NO.    EXHIBIT   FILING DATE   HEREWITH
------                -------------------                      ----   --------    -------   -----------   --------
<S>      <C>                                                   <C>    <C>         <C>       <C>           <C>
  4.01   Certificate of Incorporation, filed with the          S-1    333-82251    3.01      07/02/99
         Delaware Secretary of State on June 28, 1999.

  4.02   Certificate of Amendment of Certificate of            S-1    333-82251    3.04      09/20/99
         Incorporation, filed with the Delaware
         Secretary of State on July 30, 1999.

  4.03   Certificate of Designation, filed with the            S-1    333-82251    3.03      09/20/99
         Delaware Secretary of State on September 10, 1999.

  4.04   Certificate of Retirement, filed with the             S-1    333-95125    3.05      01/21/00
         Delaware Secretary of State on November 3, 1999.

  4.05   Bylaws, as adopted on July 2, 1999.                   S-8    333-38480    4.05      06/02/00

  4.06   Form of specimen certificate for our common           S-1    333-82251    4.01      08/12/99
         stock.

  4.07   Fourth Amended and Restated Investors' Rights         S-1    333-82251    4.02      07/02/99
         Agreement, dated June 30, 1999.

  4.08   Series E Rights Agreement, dated June 30, 1999.       S-1    333-82251    4.03      08/12/99

  4.09   Aperio, Inc., 1998 Incentive and Nonqualified                                                       X
         Stock Option Plan and related forms of
         agreements.

  4.10   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with David Milam, dated April 24, 2000.

  4.11   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with William Wolfe, dated April 24, 2000.

  5.01   Opinion of Fenwick & West LLP regarding the                                                         X
         legality of the securities being registered.

 23.01   Consent of Fenwick & West LLP (included in                                                          X
         Exhibit 5.01).

 23.02   Consent of Ernst & Young LLP, Independent                                                           X
         Auditors.

 24.01   Power of Attorney (see signature page                                                               X
         following Item 9).
</TABLE>


                                      II-3
<PAGE>   6


ITEM 9. UNDERTAKINGS.

We hereby undertake:

        (1)  To file, during any period in which offers or sales are being made,
             a post-effective amendment to this registration statement:

             (a)  to include any prospectus required by Section 10(a)(3) of the
                  Securities Act;

             (b)  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; and

             (c)  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 (a) and (b) do not apply if the information
             required to be included in a post-effective amendment by (a) and
             (b) is contained in periodic reports filed with or furnished to the
             Commission by us pursuant to Section 13 or Section 15(d) of the
             Exchange Act that are incorporated by reference in the registration
             statement.

        (2)  That, for the purpose of determining any liability under the
             Securities Act, 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.

        (4)  That, for purposes of determining any liability under the
             Securities Act, each filing of our annual report pursuant to
             Section 13(a) or Section 15(d) of the Exchange Act that is
             incorporated by reference in the registration statement shall be
             deemed to be a new registration statement relating to the
             securities offered in the registration statement, and the offering
             of the securities at that time shall be deemed to be the initial
             bona fide offering of those securities.

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to our directors, officers and controlling persons pursuant
to the foregoing provisions, or otherwise, we have been advised that in the
opinion of the Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment by us of expenses incurred or paid by one or more of our directors,
officers or controlling persons 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, we will, unless in the opinion
of our 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 Securities Act and will be
governed by the final adjudication of such issue.


                                      II-4
<PAGE>   7


                                   SIGNATURES

        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 Menlo Park, state of California, on this 26th day of
June, 2000.

                                       BROADBASE SOFTWARE, INC.


                                       By: /s/ Chuck Bay
                                           -------------------------------------
                                           Chuck Bay
                                           Chief Executive Officer and President


                                POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS that each individual whose signature
appears below and on the next page constitutes and appoints Chuck Bay, Rusty
Thomas and Eric Willgohs, and each of them, his true and lawful
attorneys-in-fact and agents with full power of substitution, for him and in his
name, place and stead, in any and all capacities, to sign any and all amendments
(including post-effective amendments) to this registration statement on Form
S-8, and to file the same with all exhibits thereto and all documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing requisite and necessary to be done
in and about the premises, as fully to all intents and purposes as he might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or his or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

        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.

<TABLE>
<CAPTION>
SIGNATURE                             TITLE                             DATE
---------                             -----                             ----
<S>                                   <C>                               <C>

PRINCIPAL EXECUTIVE OFFICER:

                                      Chief Executive Officer,
/s/ CHUCK BAY                         President and Director            June 26, 2000
-----------------------------
Chuck Bay

PRINCIPAL FINANCIAL OFFICER AND
PRINCIPAL ACCOUNTING OFFICER:

                                      Executive Vice President and
/s/ RUSTY THOMAS                      Chief Financial Officer           June 26, 2000
-----------------------------
Rusty Thomas
</TABLE>




                                      II-5
<PAGE>   8



<TABLE>
<S>                                   <C>                               <C>
ADDITIONAL DIRECTORS:


                                      Chairman of the Board of
-----------------------------         Directors
Mark Kremer


/s/ KEVIN HARVEY                      Director                          June 26, 2000
-----------------------------
Kevin Harvey


-----------------------------         Director
Paul Levy


/s/ NANCY SCHOENDORF                  Director                          June 26, 2000
-----------------------------
Nancy Schoendorf
</TABLE>



                                      II-6
<PAGE>   9


                                  EXHIBIT INDEX


<TABLE>
<CAPTION>
                                                                      INCORPORATED BY REFERENCE
EXHIBIT                                                               -------------------------            FILED
NUMBER                EXHIBIT DESCRIPTION                      FORM   FILE NO.    EXHIBIT   FILING DATE   HEREWITH
------                -------------------                      ----   --------    -------   -----------   --------
<S>      <C>                                                   <C>    <C>         <C>       <C>           <C>
  4.01   Certificate of Incorporation, filed with the          S-1    333-82251   3.01      07/02/99
         Delaware Secretary of State on June 28, 1999.

  4.02   Certificate of Amendment of Certificate of            S-1    333-82251   3.04      09/20/99
         Incorporation, filed with the Delaware
         Secretary of State on July 30, 1999.

  4.03   Certificate of Designation, filed with the            S-1    333-82251   3.03      09/20/99
         Delaware Secretary of State on September 10, 1999.

  4.04   Certificate of Retirement, filed with the             S-1    333-95125   3.05      01/21/00
         Delaware Secretary of State on November 3, 1999.

  4.05   Bylaws, as adopted on July 2, 1999.                   S-8    333-38480   4.05      06/02/00

  4.06   Form of specimen certificate for our common stock.    S-1    333-82251   4.01      08/12/99

  4.07   Fourth Amended and Restated Investors' Rights         S-1    333-82251   4.02      07/02/99
         Agreement, dated June 30, 1999.

  4.08   Series E Rights Agreement, dated June 30, 1999.       S-1    333-82251   4.03     08/12/99

  4.09   Aperio, Inc., 1998 Incentive and Nonqualified                                                       X
         Stock Option Plan and related forms of
         agreements.

  4.10   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with David Milam, dated April 24, 2000.

  4.11   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with William Wolfe, dated April 24, 2000.

  5.01   Opinion of Fenwick & West LLP regarding the                                                         X
         legality of the securities being registered.

 23.01   Consent of Fenwick & West LLP (included in                                                          X
         Exhibit 5.01).

 23.02   Consent of Ernst & Young LLP, Independent                                                           X
         Auditors.

 24.01   Power of Attorney (see signature page                                                               X
         following Item 9).
</TABLE>



                                       1
[{"type": "S-8", "sequence": "1", "filename": "s-8.txt", "description": "FORM S-8", "secsgml_size_bytes": 22693}]
{"company-data": {"conformed-name": "BROADBASE SOFTWARE INC", "cik": "0001076016", "assigned-sic": "7389", "irs-number": "770417081", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-40206", "film-number": "661724"}, "business-address": {"street1": "172 CONSTITUTION DR", "city": "MENLO PARK", "state": "CA", "zip": "94025"}, "mail-address": {"street1": "172 CONSTITUTION DRIVE", "city": "MENLO PARK", "state": "CA", "zip": "94025"}, "former-company": {"former-conformed-name": "BROADBASE INFORMATION SYSTEMS INC", "date-changed": "19990624"}}
1

      As filed with the Securities and Exchange Commission on June 26, 2000

                                                   Registration No. 333-

--------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM S-8
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933

                            BROADBASE SOFTWARE, INC.
           (Exact name of the Registrant as specified in its charter)

                  DELAWARE                                 77-0408319
       (State or other jurisdiction of                  (I.R.S. employer
       incorporation or organization)                  identification no.)

                             181 CONSTITUTION DRIVE
                          MENLO PARK, CALIFORNIA 94025
                    (Address of principal executive offices)

         OPTIONS AND PURCHASE RIGHTS ISSUED UNDER THE APERIO, INC. 1998
           INCENTIVE AND NONQUALIFIED STOCK OPTION PLAN AND ASSUMED BY
          THE REGISTRANT IN CONNECTION WITH ITS ACQUISITION OF APERIO.

           STOCK OPTION AGREEMENTS WITH DAVID MILAM AND WILLIAM WOLFE
                            (Full title of the plans)

                                  RUSTY THOMAS
              EXECUTIVE VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
                             181 CONSTITUTION DRIVE
                          MENLO PARK, CALIFORNIA 94025
                                 (650) 614-8300
            (Name, address and telephone number of agent for service)

                                   Copies to:
                             DAVID K. MICHAELS, ESQ.
                              THOMAS J. HALL, ESQ.
                               FENWICK & WEST LLP
                              TWO PALO ALTO SQUARE
                           PALO ALTO, CALIFORNIA 94306

                             CALCULATION OF REGISTRATION FEE
====================================================================================================
                                                   PROPOSED          PROPOSED
                                   AMOUNT          MAXIMUM           MAXIMUM
       TITLE OF SHARES              TO BE         AGGREGATE         AGGREGATE         AMOUNT OF
       TO BE REGISTERED          REGISTERED    PRICE PER SHARE    OFFERING PRICE   REGISTRATION FEE
====================================================================================================
Common Stock,
$0.001 par value per share       118,666(1)     $0.348360(3)       $   41,339(4)        $   11(4)
====================================================================================================
Common Stock,
$0.001 par value per share       600,000(2)     $ 14.5156(3)       $8,709,360(4)        $2,300(4)
====================================================================================================
(1)  Represents shares reserved for issuance upon the exercise of options
     granted under the Aperio 1998 Incentive and Nonqualified Stock Option Plan.
2

(2)  Represents shares reserved for issuance pursuant to the exercise of options
     granted pursuant to stock option agreements with David Milam and William
     Wolfe.

(3)  Weighted average per share exercise price for these outstanding options.

(4)  Calculated based on the weighted average per share exercise price, pursuant
     to Rule 457(h)(1) under the Securities Act of 1933, as amended (the
     "Securities Act").
3

           PART II: INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

ITEM 3. INCORPORATION OF DOCUMENTS BY REFERENCE.

        The following documents filed with the Securities and Exchange
Commission (the "Commission") are incorporated into this registration statement
by reference:

        (a)    our most recent annual report on Form 10-K filed with the
               Commission;

        (b)    all other reports filed pursuant to Section 13(a) or 15(d) of the
               Securities Exchange Act of 1934, as amended (the "Exchange Act")
               since the end of the fiscal year covered by the document referred
               to in (a) above; and

        (c)    the description of our common stock contained in our registration
               statement on Form 8-A filed under Section 12(g) of the Exchange
               Act, including any amendment or report filed for the purpose of
               updating such description.

        All documents subsequently filed by us pursuant to Sections 13(a),
13(c), 14 and 15(d) of the Exchange Act, prior to the filing of a post-effective
amendment which indicates that all securities registered hereby have been sold
or which deregisters all securities then remaining unsold, shall be deemed to be
incorporated by reference herein and to be a part hereof from the date of the
filing of such documents.

ITEM 4. DESCRIPTION OF SECURITIES.

        Not applicable.

ITEM 5. INTERESTS OF NAMED EXPERTS AND COUNSEL.

        Certain partners and investment partnerships comprised of certain
partners of Fenwick & West LLP, our counsel, own 64,758 shares of our common
stock.

ITEM 6. INDEMNIFICATION OF DIRECTORS AND OFFICERS.

        Section 145 of the Delaware General Corporation Law authorizes a court
to award, or a corporation's board of directors to grant, indemnity to directors
and executive officers in terms sufficiently broad to permit such
indemnification under certain circumstances for liabilities, including
reimbursement for expenses incurred arising under the Securities Act.

        As permitted by the Delaware General Corporation Law, our certificate of
incorporation, as amended, includes a provision that eliminates the personal
liability of its directors for monetary damages for breach of fiduciary duty as
a director, except for liability:

        -  for any breach of the director's duty of loyalty to us or our
           stockholders;

        -  for acts or omissions not in good faith or that involve intentional
           misconduct or a knowing violation of law;

        -  under Section 174 of the Delaware General Corporation Law (regarding
           unlawful dividends and stock purchases); or

        -  for any transaction from which the director derived an improper
           personal benefit.

                                      II-1
4

        As permitted by the Delaware General Corporation Law, our bylaws provide
that:

        -  we are required to indemnify our directors and executive officers to
           the fullest extent permitted by the Delaware General Corporation Law,
           subject to limited exceptions;

        -  we may indemnify our other employees and agents as set forth in the
           Delaware General Corporation Law;

        -  we are required to advance expenses, as incurred, to our directors
           and officers in connection with a legal proceeding to the fullest
           extent permitted by the Delaware General Corporation Law, subject to
           limited exceptions; and

        -  the rights conferred in the bylaws are not exclusive.

        We entered into indemnity agreements with each of our current directors
and executive officers to give such directors and executive officers additional
contractual assurances regarding the scope of the indemnification set forth in
our certificate of incorporation and to provide additional procedural
protections. The indemnification provisions in our certificate of incorporation,
bylaws and the indemnity agreements may be sufficiently broad to permit
indemnification of our directors and executive officers for liabilities arising
under the Securities Act.

        We entered into underwriting agreements with investment banks and
certain of our stockholders in connection with our initial public offering and
secondary public offering pursuant to which the underwriters agreed to indemnify
us, our directors and executive officers against certain liabilities, including
liabilities arising under the Securities Act. Likewise, pursuant to our Fourth
Amended and Restated Investors' Rights Agreement, stockholders exercising rights
pursuant to this agreement have agreed to indemnify us, our directors and our
officers who sign the registration statement against certain liabilities
including liabilities arising under the Securities Act.

        We have also obtained directors' and officers' liability insurance that
will include coverage for securities matters. At present, there is no pending
litigation or proceeding involving any of our directors, officers or employees
regarding which indemnification is sought, nor are we aware of any threatened
litigation that may result in claims for indemnification.

        See also the undertakings set out in response to Item 9.

        Reference is made to the following documents regarding relevant
indemnification provisions described above and elsewhere herein:

DOCUMENT

Certificate of Incorporation and amendments (see Exhibits 4.01-4.04).

Bylaws (see Exhibit 4.05).

Form of Indemnity Agreement (incorporated by reference to Exhibit 10.01 to our
registration statement on Form S-1 (File No. 333-82251) filed with the
Commission on July 2, 1999, as subsequently amended).

ITEM 7. EXEMPTION FROM REGISTRATION CLAIMED.

        Not applicable.

                                      II-2
5

ITEM 8. EXHIBITS.
INCORPORATED BY REFERENCE
EXHIBIT                                                               -------------------------            FILED
NUMBER                EXHIBIT DESCRIPTION                      FORM   FILE NO.    EXHIBIT   FILING DATE   HEREWITH
------                -------------------                      ----   --------    -------   -----------   --------
4.01   Certificate of Incorporation, filed with the          S-1    333-82251    3.01      07/02/99
         Delaware Secretary of State on June 28, 1999.

  4.02   Certificate of Amendment of Certificate of            S-1    333-82251    3.04      09/20/99
         Incorporation, filed with the Delaware
         Secretary of State on July 30, 1999.

  4.03   Certificate of Designation, filed with the            S-1    333-82251    3.03      09/20/99
         Delaware Secretary of State on September 10, 1999.

  4.04   Certificate of Retirement, filed with the             S-1    333-95125    3.05      01/21/00
         Delaware Secretary of State on November 3, 1999.

  4.05   Bylaws, as adopted on July 2, 1999.                   S-8    333-38480    4.05      06/02/00

  4.06   Form of specimen certificate for our common           S-1    333-82251    4.01      08/12/99
         stock.

  4.07   Fourth Amended and Restated Investors' Rights         S-1    333-82251    4.02      07/02/99
         Agreement, dated June 30, 1999.

  4.08   Series E Rights Agreement, dated June 30, 1999.       S-1    333-82251    4.03      08/12/99

  4.09   Aperio, Inc., 1998 Incentive and Nonqualified                                                       X
         Stock Option Plan and related forms of
         agreements.

  4.10   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with David Milam, dated April 24, 2000.

  4.11   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with William Wolfe, dated April 24, 2000.

  5.01   Opinion of Fenwick & West LLP regarding the                                                         X
         legality of the securities being registered.

 23.01   Consent of Fenwick & West LLP (included in                                                          X
         Exhibit 5.01).

 23.02   Consent of Ernst & Young LLP, Independent                                                           X
         Auditors.

 24.01   Power of Attorney (see signature page                                                               X
         following Item 9).
II-3
6

ITEM 9. UNDERTAKINGS.

We hereby undertake:

        (1)  To file, during any period in which offers or sales are being made,
             a post-effective amendment to this registration statement:

             (a)  to include any prospectus required by Section 10(a)(3) of the
                  Securities Act;

             (b)  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; and

             (c)  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 (a) and (b) do not apply if the information
             required to be included in a post-effective amendment by (a) and
             (b) is contained in periodic reports filed with or furnished to the
             Commission by us pursuant to Section 13 or Section 15(d) of the
             Exchange Act that are incorporated by reference in the registration
             statement.

        (2)  That, for the purpose of determining any liability under the
             Securities Act, 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.

        (4)  That, for purposes of determining any liability under the
             Securities Act, each filing of our annual report pursuant to
             Section 13(a) or Section 15(d) of the Exchange Act that is
             incorporated by reference in the registration statement shall be
             deemed to be a new registration statement relating to the
             securities offered in the registration statement, and the offering
             of the securities at that time shall be deemed to be the initial
             bona fide offering of those securities.

        Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to our directors, officers and controlling persons pursuant
to the foregoing provisions, or otherwise, we have been advised that in the
opinion of the Commission such indemnification is against public policy as
expressed in the Securities Act and is, therefore unenforceable. In the event
that a claim for indemnification against such liabilities (other than the
payment by us of expenses incurred or paid by one or more of our directors,
officers or controlling persons 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, we will, unless in the opinion
of our 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 Securities Act and will be
governed by the final adjudication of such issue.

                                      II-4
7

                                   SIGNATURES

        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 Menlo Park, state of California, on this 26th day of
June, 2000.

                                       BROADBASE SOFTWARE, INC.

                                       By: /s/ Chuck Bay
                                           -------------------------------------
                                           Chuck Bay
                                           Chief Executive Officer and President

                                POWER OF ATTORNEY

        KNOW ALL PERSONS BY THESE PRESENTS that each individual whose signature
appears below and on the next page constitutes and appoints Chuck Bay, Rusty
Thomas and Eric Willgohs, and each of them, his true and lawful
attorneys-in-fact and agents with full power of substitution, for him and in his
name, place and stead, in any and all capacities, to sign any and all amendments
(including post-effective amendments) to this registration statement on Form
S-8, and to file the same with all exhibits thereto and all documents in
connection therewith, with the Securities and Exchange Commission, granting unto
said attorneys-in-fact and agents, and each of them, full power and authority to
do and perform each and every act and thing requisite and necessary to be done
in and about the premises, as fully to all intents and purposes as he might or
could do in person, hereby ratifying and confirming all that said
attorneys-in-fact and agents or any of them, or his or their substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

        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.
SIGNATURE                             TITLE                             DATE
---------                             -----                             ----
PRINCIPAL EXECUTIVE OFFICER:

                                      Chief Executive Officer,
/s/ CHUCK BAY                         President and Director            June 26, 2000
-----------------------------
Chuck Bay

PRINCIPAL FINANCIAL OFFICER AND
PRINCIPAL ACCOUNTING OFFICER:

                                      Executive Vice President and
/s/ RUSTY THOMAS                      Chief Financial Officer           June 26, 2000
-----------------------------
Rusty Thomas
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8
ADDITIONAL DIRECTORS:

                                      Chairman of the Board of
-----------------------------         Directors
Mark Kremer

/s/ KEVIN HARVEY                      Director                          June 26, 2000
-----------------------------
Kevin Harvey

-----------------------------         Director
Paul Levy

/s/ NANCY SCHOENDORF                  Director                          June 26, 2000
-----------------------------
Nancy Schoendorf
II-6
9

                                  EXHIBIT INDEX
INCORPORATED BY REFERENCE
EXHIBIT                                                               -------------------------            FILED
NUMBER                EXHIBIT DESCRIPTION                      FORM   FILE NO.    EXHIBIT   FILING DATE   HEREWITH
------                -------------------                      ----   --------    -------   -----------   --------
4.01   Certificate of Incorporation, filed with the          S-1    333-82251   3.01      07/02/99
         Delaware Secretary of State on June 28, 1999.

  4.02   Certificate of Amendment of Certificate of            S-1    333-82251   3.04      09/20/99
         Incorporation, filed with the Delaware
         Secretary of State on July 30, 1999.

  4.03   Certificate of Designation, filed with the            S-1    333-82251   3.03      09/20/99
         Delaware Secretary of State on September 10, 1999.

  4.04   Certificate of Retirement, filed with the             S-1    333-95125   3.05      01/21/00
         Delaware Secretary of State on November 3, 1999.

  4.05   Bylaws, as adopted on July 2, 1999.                   S-8    333-38480   4.05      06/02/00

  4.06   Form of specimen certificate for our common stock.    S-1    333-82251   4.01      08/12/99

  4.07   Fourth Amended and Restated Investors' Rights         S-1    333-82251   4.02      07/02/99
         Agreement, dated June 30, 1999.

  4.08   Series E Rights Agreement, dated June 30, 1999.       S-1    333-82251   4.03     08/12/99

  4.09   Aperio, Inc., 1998 Incentive and Nonqualified                                                       X
         Stock Option Plan and related forms of
         agreements.

  4.10   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with David Milam, dated April 24, 2000.

  4.11   Broadbase Software, Inc. Non-Plan Stock Option                                                      X
         Agreement with William Wolfe, dated April 24, 2000.

  5.01   Opinion of Fenwick & West LLP regarding the                                                         X
         legality of the securities being registered.

 23.01   Consent of Fenwick & West LLP (included in                                                          X
         Exhibit 5.01).

 23.02   Consent of Ernst & Young LLP, Independent                                                           X
         Auditors.

 24.01   Power of Attorney (see signature page                                                               X
         following Item 9).
1