<PAGE>

     As filed with the Securities and Exchange Commission on April 7, 2000.

                                                     Registration No. 333-_____

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  -------------
                                    FORM S-8
                             REGISTRATION STATEMENT

                                      Under

                           THE SECURITIES ACT OF 1933

                                  -------------
                                  eSPEED, INC.

             (Exact name of Registrant as specified in its charter)

      Delaware                                       13-4063515
(State or other jurisdiction of                      (IRS Employer
incorporation or organization)                       Identification No.)


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

                             One World Trade Center
                                   103rd Floor

                            New York, New York 10048

                                 (212) 938-3773

          (Address, including zip code, of Principal Executive Offices)

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

                   eSPEED, INC. 1999 LONG-TERM INCENTIVE PLAN

                    eSPEED, INC. EMPLOYEE STOCK PURCHASE PLAN



                            (Full Title of the Plan)

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


                                Stephen M. Merkel
                             Senior Vice President,
                          General Counsel and Secretary
                                  eSpeed, Inc.
                             One World Trade Center
                                   105th Floor
                            New York, New York 10048
                                 (212) 938-3773
                      (Name, address, and telephone number,
                   including area code, of agent for service)

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

                                   Copies to:
                           Christopher T. Jensen, Esq.
                           Morgan, Lewis & Bockius LLP
                                 101 Park Avenue
                            New York, New York 10178
                                 (212) 309-6000
                               Fax: (212) 309-6273

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



<PAGE>


            CALCULATION OF REGISTRATION FEE

<TABLE>
<CAPTION>
======================================================================================================
                                                                      Proposed
                                                    Proposed           maximum
                                                    maximum           aggregate         Amount of
 Title of securities to     Amount to be            offering          offering      registration fee
      be registered        registered(1)        price per share         price              (4)
------------------------------------------------------------------------------------------------------
<S>                        <C>                  <C>                <C>              <C>
Company's Class A Common    6,519,449             $22.00(2)          $143,427,878        $ 37,865
Stock, $.01 par value         128,032             $47.650(2)           $6,100,725          $1,611
                            3,977,519             $41.625(3)         $165,564,228         $43,709
Total                     ___________                                                  __________

                           10,625,000                                                   $ 83,185

====================================================================================================================================
</TABLE>

(1)       Pursuant to Rule 416(a), the number of shares being registered shall
          include an indeterminate number of additional shares of common stock
          or common stock which may become issuable as a result of stock splits,
          stock dividends, or similar transactions in accordance with
          anti-dilution provisions of the 1999 Long-Term Incentive Plan and the
          Employee Stock Purchase Plan.

(2)       Calculated pursuant to Rule 457(h) for the purpose of calculating the
          registration fee, based upon the price at which outstanding options
          under the 1999 Long-Term Incentive Plan may be exercised.

(3)       Calculated pursuant to Rules 457(c) and (h), based upon the average of
          the high and low prices for the common stock as reported on the Nasdaq
          National Market on April 4, 2000.

(4)       Calculated pursuant to Section 6(b) of the Securities Act of 1933, as
          amended (the "Securities Act"), as follows: proposed maximum aggregate
          offering price multiplied by .000264.


<PAGE>



                                     PART I

              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

Item 1.   Plan Information.*
          ----------------

Item 2.   Registrant Information and Employee Plan Annual Information.*
          -----------------------------------------------------------

          * Information required by Part I to be contained in the Section 10(a)
          prospectus is omitted from this registration statement in accordance
          with Rule 428 under the Securities Act and the Explanatory Note to
          Part I of this Form S-8.

                                       3
<PAGE>


                                     PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.   Incorporation of Documents by Reference.
          ---------------------------------------

          The following documents filed by us with the Securities and Exchange
Commission (the "SEC") are incorporated by reference into this Registration
Statement:

          (a) The description of our Class A Common Stock, par value $.01 per
share, contained in our Registration Statement on Form 8-A (Registration No.
000-28191) filed with the SEC on November 17, 1999, including any amendment or
report filed for the purpose of updating such description.

          (b) Our Annual Report on Form 10-K filed with the SEC on March 29,
2000.

          All reports and other documents subsequently filed by us pursuant to
Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), prior to the filing of a post-effective amendment
which indicates that all securities offered 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 hereof from the date
of filing of such documents.

          Any statement contained herein or in a document all or a portion of
which is incorporated or deemed to be incorporated by reference herein shall be
deemed to be modified or superseded for purposes of this Registration Statement
to the extent that a statement contained herein or in any other subsequently
filed document which also is or is deemed to be incorporated by reference herein
modifies or supersedes such statement. Any such statement so modified or
superseded shall not be deemed, except as so modified or superseded, to
constitute a part of this Registration Statement.

                                     Experts
                                     -------

          The financial statements included in our Annual Report on Form 10-K
for the period ended December 31, 1999, incorporated by reference in this
Registration Statement have been audited by Deloitte & Touche LLP, independent
auditors, as indicated in their report with respect thereto, and are included
in reliance upon the report of such firm given upon their authority as experts
in accounting and auditing.

Item 4.   Description of Securities.
          -------------------------

          Not Applicable

Item 5.   Interests of Named Experts and Counsel.
          --------------------------------------

          Not Applicable

                                       -II-1-
<PAGE>



Item 6.   Indemnification of Directors and Officers.
          -----------------------------------------

          Our Amended and Restated Certificate of Incorporation limits, to the
maximum extent permitted under Delaware law, the personal liability of directors
and officers for monetary damages for breach of their fiduciary duties as
directors and officers, except in certain circumstances involving certain
wrongful acts, such as a breach of the director's duty of loyalty or acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law.

          Section 145 of the Delaware General Corporation Law permits us to
indemnify officers, directors or employees against expenses, including
attorney's fees, judgments, fines and amounts paid in settlement in connection
with legal proceedings if the officer, director or employee acted in good faith
and in a manner reasonably believed to be in or not opposed to our best
interests and, with respect to any criminal act or proceeding, if he or she had
no reasonable cause to believe his or her conduct was unlawful. Indemnification
is not permitted as to any matter as to which the person is adjudged to be
liable unless, and only to the extent that, the court in which such action or
suit was brought upon application determines that, despite the adjudication of
liability, but in view of all the circumstances of the case, the person is
fairly and reasonably entitled to indemnity for such expenses as the court deems
proper. Individuals who successfully defend such an action are entitled to
indemnification against expenses reasonably incurred in connection with the
action.

          Our Amended and Restated By-Laws require us to indemnify directors and
officers against, to the fullest extent permitted by law, liabilities which they
may incur under the circumstances described in the preceding paragraph.

          We plan to maintain standard policies of insurance under which
coverage is provided (1) to our directors and officers against loss arising from
claims made by reason of breach of duty or other wrongful act and (2) to us with
respect to payments which may be made by us to such officers and directors
pursuant to the above indemnification provision or otherwise as a matter of law.

Item 7.   Exemption from Registration Claimed.
          -----------------------------------

          Not Applicable

Item 8.   Exhibits.
          --------

          Exhibit          Description

          4.1              Amended and Restated Certificate of Incorporation of
                           eSpeed, Inc. Filed as Exhibit 3.1 and incorporated by
                           reference to the Company's Registration Statement on
                           Form S-1, Amendment No. 2 (Registration No.
                           333-87475) filed with the SEC on November 15, 1999.

          4.2              Amended and Restated By-Laws of eSpeed, Inc. Filed as
                           Exhibit 3.2 and incorporated by reference to the
                           Company's Registration Statement on Form S-1,
                           Amendment No. 1 (Registration No. 333-87475) filed
                           with the SEC on November 15, 1999.



                                       -II-2-

<PAGE>



          4.3              eSpeed, Inc. 1999 Long-Term Incentive Plan. Filed as
                           Exhibit 10.1 and incorporated by reference to the
                           Company's Registration Statement on Form S-1,
                           Amendment No. 4 (Registration No. 333-87475) filed
                           with the SEC on December 8, 1999.

          4.4              eSpeed, Inc. Employee Stock Purchase Plan. Filed as
                           Exhibit 10.2 and incorporated by reference to the
                           Company's Registration Statement on Form S-1,
                           Amendment No. 4 (Registration No. 333-87475) filed
                           with the SEC on December 8, 1999.

          5.1              Opinion of Morgan, Lewis & Bockius LLP.

          23.1             Consent of Deloitte & Touche LLP

          23.3             Consent of Morgan, Lewis & Bockius LLP (included in
                           Exhibit 5.1).

          24               Powers of Attorney (included on page II-5 of this
                           Registration Statement).

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;

                  (ii) To reflect in the Prospectus any facts or events arising
                  after the effective date of this 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 this Registration
                  Statement; and

                  (iii) To include any material information with respect to the
                  plan of distribution not previously disclosed in this
                  Registration Statement or any material change to such
                  information in this Registration Statement;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the registrant pursuant to
Section 13 or Section 15(d) of the Exchange Act that are incorporated by
reference in this 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.


                                     -II-3-
<PAGE>

                  (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, each filing of
the registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to 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 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 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 SEC 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 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 Securities Act and will be governed by the final
adjudication of such issue.


                                     -II-4-

<PAGE>



                                   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 New York, State of New York, on the 6th day of April,
2000.

                                    eSpeed, Inc.

                                    By:/s/ Howard W. Lutnick
                                       ------------------------
                                    Howard W. Lutnick
                                    Chairman of the Board and
                                    Chief Executive Officer

         Know all persons by these presents, each person whose signature appears
below constitutes and appoints Howard W. Lutnick, Frederick T. Varacchi, and
Douglas B. Gardner and each of them, with full power to act without, the other
such person's true and lawful attorneys-in-fact and agents, with full power of
substitution and resubstitution, 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 and any and all other documents and
instruments incidental thereto, and to file the same, with all exhibits thereto,
and all documents in connection therewith, with the Securities and Exchange
Commission and any other regulatory authority, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, 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 their or his 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 below by the following individuals in the
capacities and on the date or dates indicated.


<TABLE>
<S>                                               <C>                                   <C>
/s/ Howard W. Lutnick                             Chairman of the Board and Chief       April 6, 2000
----------------------------                      Executive Officer  (Principal
Howard W. Lutnick                                 Executive Officer)


/s/ Frederick T. Varacchi                         President and Chief Operating         April 6, 2000
----------------------------                      Officer
Frederick T. Varacchi

/s/ Douglas B. Gardner
----------------------------                      Vice Chairman                         April 6, 2000
Douglas B. Gardner


/s/ Kevin C. Piccoli                              Senior Vice President and Chief       April 6, 2000
----------------------------                      Financial Officer
 Kevin C. Piccoli

</TABLE>

                                     -II-5-
<PAGE>

                                            (Principal Financial and
                                              Accounting Officer)

<TABLE>
<S>                                               <C>                                   <C>
/s/ Richard C. Breeden                                                                  April 6, 2000
----------------------------                      Director
Richard C. Breeden

/s/ Larry R. Carter                               Director                              April 6, 2000
----------------------------
Larry R. Carter

/s/ William J. Moran                              Director                              April 6, 2000
----------------------------
William J. Moran

/s/ Joseph P. Shea                                Director                              April 6, 2000
----------------------------
Joseph P. Shea
</TABLE>



                                     -II-6-


<PAGE>


         Exhibit           Description
         -------           -----------

         4.1      Amended and Restated Certificate of Incorporation of eSpeed,
                  Inc. Filed as Exhibit 3.1 and incorporated by reference to the
                  Company's Registration Statement on Form S-1, Amendment No. 2
                  (Registration No. 333-87475) filed with the SEC on November
                  15, 1999.

         4.2      Amended and Restated By-Laws of eSpeed, Inc. Filed as Exhibit
                  3.2 and incorporated by reference to the Company's
                  Registration Statement on Form S-1, Amendment No. 1
                  (Registration No. 333-87475) filed with the SEC on November
                  15, 1999.

         4.3      eSpeed, Inc. 1999 Long-Term Incentive Plan. Filed as Exhibit
                  10.1 and incorporated by reference to the Company's
                  Registration Statement on Form S-1, Amendment No. 4
                  (Registration No. 333-87475) filed with the SEC on December 8,
                  1999.

         4.4      eSpeed, Inc. Employee Stock Purchase Plan. Filed as Exhibit
                  10.2 and incorporated by reference to the Company's
                  Registration Statement on Form S-1, Amendment No. 4
                  (Registration No. 333-87475) filed with the SEC on December 8,
                  1999.

         5.1      Opinion of Morgan, Lewis & Bockius LLP.

         23.1     Consent of Deloitte & Touche LLP

         23.3     Consent of Morgan, Lewis & Bockius LLP (included in Exhibit
                  5.1).

         24       Powers of Attorney (included on page II-5 of this Registration
                  Statement).



                                     -II-7-
[{"type": "S-8", "sequence": "1", "description": "REGISTRATION STATEMENT", "secsgml_size_bytes": 22353}]
{"company-data": {"conformed-name": "ESPEED INC", "cik": "0001094831", "assigned-sic": "6200", "irs-number": "134063515", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-34324", "film-number": "596276"}, "business-address": {"street1": "ONE WORLD TRADE CENTER", "street2": "103TH FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10048", "phone": "2129383773"}, "mail-address": {"street1": "ONE WORLD TRADE CENTER", "street2": "103RD FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10048"}}
As filed with the Securities and Exchange Commission on April 7, 2000.

                                                     Registration No. 333-_____

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  -------------
                                    FORM S-8
                             REGISTRATION STATEMENT

                                      Under

                           THE SECURITIES ACT OF 1933

                                  -------------
                                  eSPEED, INC.

             (Exact name of Registrant as specified in its charter)

      Delaware                                       13-4063515
(State or other jurisdiction of                      (IRS Employer
incorporation or organization)                       Identification No.)

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

                             One World Trade Center
                                   103rd Floor

                            New York, New York 10048

                                 (212) 938-3773

          (Address, including zip code, of Principal Executive Offices)

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

                   eSPEED, INC. 1999 LONG-TERM INCENTIVE PLAN

                    eSPEED, INC. EMPLOYEE STOCK PURCHASE PLAN

                            (Full Title of the Plan)

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

                                Stephen M. Merkel
                             Senior Vice President,
                          General Counsel and Secretary
                                  eSpeed, Inc.
                             One World Trade Center
                                   105th Floor
                            New York, New York 10048
                                 (212) 938-3773
                      (Name, address, and telephone number,
                   including area code, of agent for service)

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

                                   Copies to:
                           Christopher T. Jensen, Esq.
                           Morgan, Lewis & Bockius LLP
                                 101 Park Avenue
                            New York, New York 10178
                                 (212) 309-6000
                               Fax: (212) 309-6273

                                  -------------
CALCULATION OF REGISTRATION FEE
======================================================================================================
                                                                      Proposed
                                                    Proposed           maximum
                                                    maximum           aggregate         Amount of
 Title of securities to     Amount to be            offering          offering      registration fee
      be registered        registered(1)        price per share         price              (4)
------------------------------------------------------------------------------------------------------
Company's Class A Common    6,519,449             $22.00(2)          $143,427,878        $ 37,865
Stock, $.01 par value         128,032             $47.650(2)           $6,100,725          $1,611
                            3,977,519             $41.625(3)         $165,564,228         $43,709
Total                     ___________                                                  __________

                           10,625,000                                                   $ 83,185

====================================================================================================================================
(1)       Pursuant to Rule 416(a), the number of shares being registered shall
          include an indeterminate number of additional shares of common stock
          or common stock which may become issuable as a result of stock splits,
          stock dividends, or similar transactions in accordance with
          anti-dilution provisions of the 1999 Long-Term Incentive Plan and the
          Employee Stock Purchase Plan.

(2)       Calculated pursuant to Rule 457(h) for the purpose of calculating the
          registration fee, based upon the price at which outstanding options
          under the 1999 Long-Term Incentive Plan may be exercised.

(3)       Calculated pursuant to Rules 457(c) and (h), based upon the average of
          the high and low prices for the common stock as reported on the Nasdaq
          National Market on April 4, 2000.

(4)       Calculated pursuant to Section 6(b) of the Securities Act of 1933, as
          amended (the "Securities Act"), as follows: proposed maximum aggregate
          offering price multiplied by .000264.
PART I

              INFORMATION REQUIRED IN THE SECTION 10(a) PROSPECTUS

Item 1.   Plan Information.*
          ----------------

Item 2.   Registrant Information and Employee Plan Annual Information.*
          -----------------------------------------------------------

          * Information required by Part I to be contained in the Section 10(a)
          prospectus is omitted from this registration statement in accordance
          with Rule 428 under the Securities Act and the Explanatory Note to
          Part I of this Form S-8.

                                       3
PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3.   Incorporation of Documents by Reference.
          ---------------------------------------

          The following documents filed by us with the Securities and Exchange
Commission (the "SEC") are incorporated by reference into this Registration
Statement:

          (a) The description of our Class A Common Stock, par value $.01 per
share, contained in our Registration Statement on Form 8-A (Registration No.
000-28191) filed with the SEC on November 17, 1999, including any amendment or
report filed for the purpose of updating such description.

          (b) Our Annual Report on Form 10-K filed with the SEC on March 29,
2000.

          All reports and other documents subsequently filed by us pursuant to
Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), prior to the filing of a post-effective amendment
which indicates that all securities offered 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 hereof from the date
of filing of such documents.

          Any statement contained herein or in a document all or a portion of
which is incorporated or deemed to be incorporated by reference herein shall be
deemed to be modified or superseded for purposes of this Registration Statement
to the extent that a statement contained herein or in any other subsequently
filed document which also is or is deemed to be incorporated by reference herein
modifies or supersedes such statement. Any such statement so modified or
superseded shall not be deemed, except as so modified or superseded, to
constitute a part of this Registration Statement.

                                     Experts
                                     -------

          The financial statements included in our Annual Report on Form 10-K
for the period ended December 31, 1999, incorporated by reference in this
Registration Statement have been audited by Deloitte & Touche LLP, independent
auditors, as indicated in their report with respect thereto, and are included
in reliance upon the report of such firm given upon their authority as experts
in accounting and auditing.

Item 4.   Description of Securities.
          -------------------------

          Not Applicable

Item 5.   Interests of Named Experts and Counsel.
          --------------------------------------

          Not Applicable

                                       -II-1-
Item 6.   Indemnification of Directors and Officers.
          -----------------------------------------

          Our Amended and Restated Certificate of Incorporation limits, to the
maximum extent permitted under Delaware law, the personal liability of directors
and officers for monetary damages for breach of their fiduciary duties as
directors and officers, except in certain circumstances involving certain
wrongful acts, such as a breach of the director's duty of loyalty or acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law.

          Section 145 of the Delaware General Corporation Law permits us to
indemnify officers, directors or employees against expenses, including
attorney's fees, judgments, fines and amounts paid in settlement in connection
with legal proceedings if the officer, director or employee acted in good faith
and in a manner reasonably believed to be in or not opposed to our best
interests and, with respect to any criminal act or proceeding, if he or she had
no reasonable cause to believe his or her conduct was unlawful. Indemnification
is not permitted as to any matter as to which the person is adjudged to be
liable unless, and only to the extent that, the court in which such action or
suit was brought upon application determines that, despite the adjudication of
liability, but in view of all the circumstances of the case, the person is
fairly and reasonably entitled to indemnity for such expenses as the court deems
proper. Individuals who successfully defend such an action are entitled to
indemnification against expenses reasonably incurred in connection with the
action.

          Our Amended and Restated By-Laws require us to indemnify directors and
officers against, to the fullest extent permitted by law, liabilities which they
may incur under the circumstances described in the preceding paragraph.

          We plan to maintain standard policies of insurance under which
coverage is provided (1) to our directors and officers against loss arising from
claims made by reason of breach of duty or other wrongful act and (2) to us with
respect to payments which may be made by us to such officers and directors
pursuant to the above indemnification provision or otherwise as a matter of law.

Item 7.   Exemption from Registration Claimed.
          -----------------------------------

          Not Applicable

Item 8.   Exhibits.
          --------

          Exhibit          Description

          4.1              Amended and Restated Certificate of Incorporation of
                           eSpeed, Inc. Filed as Exhibit 3.1 and incorporated by
                           reference to the Company's Registration Statement on
                           Form S-1, Amendment No. 2 (Registration No.
                           333-87475) filed with the SEC on November 15, 1999.

          4.2              Amended and Restated By-Laws of eSpeed, Inc. Filed as
                           Exhibit 3.2 and incorporated by reference to the
                           Company's Registration Statement on Form S-1,
                           Amendment No. 1 (Registration No. 333-87475) filed
                           with the SEC on November 15, 1999.

                                       -II-2-
4.3              eSpeed, Inc. 1999 Long-Term Incentive Plan. Filed as
                           Exhibit 10.1 and incorporated by reference to the
                           Company's Registration Statement on Form S-1,
                           Amendment No. 4 (Registration No. 333-87475) filed
                           with the SEC on December 8, 1999.

          4.4              eSpeed, Inc. Employee Stock Purchase Plan. Filed as
                           Exhibit 10.2 and incorporated by reference to the
                           Company's Registration Statement on Form S-1,
                           Amendment No. 4 (Registration No. 333-87475) filed
                           with the SEC on December 8, 1999.

          5.1              Opinion of Morgan, Lewis & Bockius LLP.

          23.1             Consent of Deloitte & Touche LLP

          23.3             Consent of Morgan, Lewis & Bockius LLP (included in
                           Exhibit 5.1).

          24               Powers of Attorney (included on page II-5 of this
                           Registration Statement).

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;

                  (ii) To reflect in the Prospectus any facts or events arising
                  after the effective date of this 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 this Registration
                  Statement; and

                  (iii) To include any material information with respect to the
                  plan of distribution not previously disclosed in this
                  Registration Statement or any material change to such
                  information in this Registration Statement;

provided, however, that paragraphs (a)(1)(i) and (a)(1)(ii) do not apply if the
information required to be included in a post-effective amendment by those
paragraphs is contained in periodic reports filed by the registrant pursuant to
Section 13 or Section 15(d) of the Exchange Act that are incorporated by
reference in this 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.

                                     -II-3-
(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, each filing of
the registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to 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 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 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 SEC 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 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 Securities Act and will be governed by the final
adjudication of such issue.

                                     -II-4-
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 New York, State of New York, on the 6th day of April,
2000.

                                    eSpeed, Inc.

                                    By:/s/ Howard W. Lutnick
                                       ------------------------
                                    Howard W. Lutnick
                                    Chairman of the Board and
                                    Chief Executive Officer

         Know all persons by these presents, each person whose signature appears
below constitutes and appoints Howard W. Lutnick, Frederick T. Varacchi, and
Douglas B. Gardner and each of them, with full power to act without, the other
such person's true and lawful attorneys-in-fact and agents, with full power of
substitution and resubstitution, 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 and any and all other documents and
instruments incidental thereto, and to file the same, with all exhibits thereto,
and all documents in connection therewith, with the Securities and Exchange
Commission and any other regulatory authority, granting unto said
attorneys-in-fact and agents full power and authority to do and perform each and
every act and thing requisite and necessary to be done, 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 their or his 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 below by the following individuals in the
capacities and on the date or dates indicated.
/s/ Howard W. Lutnick                             Chairman of the Board and Chief       April 6, 2000
----------------------------                      Executive Officer  (Principal
Howard W. Lutnick                                 Executive Officer)

/s/ Frederick T. Varacchi                         President and Chief Operating         April 6, 2000
----------------------------                      Officer
Frederick T. Varacchi

/s/ Douglas B. Gardner
----------------------------                      Vice Chairman                         April 6, 2000
Douglas B. Gardner

/s/ Kevin C. Piccoli                              Senior Vice President and Chief       April 6, 2000
----------------------------                      Financial Officer
 Kevin C. Piccoli
-II-5-
(Principal Financial and
                                              Accounting Officer)
/s/ Richard C. Breeden                                                                  April 6, 2000
----------------------------                      Director
Richard C. Breeden

/s/ Larry R. Carter                               Director                              April 6, 2000
----------------------------
Larry R. Carter

/s/ William J. Moran                              Director                              April 6, 2000
----------------------------
William J. Moran

/s/ Joseph P. Shea                                Director                              April 6, 2000
----------------------------
Joseph P. Shea
-II-6-
Exhibit           Description
         -------           -----------

         4.1      Amended and Restated Certificate of Incorporation of eSpeed,
                  Inc. Filed as Exhibit 3.1 and incorporated by reference to the
                  Company's Registration Statement on Form S-1, Amendment No. 2
                  (Registration No. 333-87475) filed with the SEC on November
                  15, 1999.

         4.2      Amended and Restated By-Laws of eSpeed, Inc. Filed as Exhibit
                  3.2 and incorporated by reference to the Company's
                  Registration Statement on Form S-1, Amendment No. 1
                  (Registration No. 333-87475) filed with the SEC on November
                  15, 1999.

         4.3      eSpeed, Inc. 1999 Long-Term Incentive Plan. Filed as Exhibit
                  10.1 and incorporated by reference to the Company's
                  Registration Statement on Form S-1, Amendment No. 4
                  (Registration No. 333-87475) filed with the SEC on December 8,
                  1999.

         4.4      eSpeed, Inc. Employee Stock Purchase Plan. Filed as Exhibit
                  10.2 and incorporated by reference to the Company's
                  Registration Statement on Form S-1, Amendment No. 4
                  (Registration No. 333-87475) filed with the SEC on December 8,
                  1999.

         5.1      Opinion of Morgan, Lewis & Bockius LLP.

         23.1     Consent of Deloitte & Touche LLP

         23.3     Consent of Morgan, Lewis & Bockius LLP (included in Exhibit
                  5.1).

         24       Powers of Attorney (included on page II-5 of this Registration
                  Statement).

                                     -II-7-