EXHIBIT 32


                CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350,
                       AS ADOPTED PURSUANT TO SECTION 906
                        OF THE SARBANES-OXLEY ACT OF 2002


In connection with the quarterly report of eSpeed, Inc., a Delaware corporation
(the "Company") on Form 10-Q for the period ended September 30, 2003 as filed
with the Securities and Exchange Commission on the date hereof (the "Form
10-Q"), each of Howard W. Lutnick, Chief Executive Officer of the Company, and
Jeffrey M. Chertoff, Chief Financial Officer of the Company, certifies, pursuant
to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that to his knowledge:

(1)  The Form 10-Q fully complies with the requirements of Section 13(a) or
     15(d) of the Securities Exchange Act of 1934; and

(2)  The information contained in the Form 10-Q fairly presents, in all material
     respects, the financial condition and results of operations of the Company.



/s/ Howard W. Lutnick                         /s/ Jeffrey M. Chertoff
----------------------------------            ----------------------------------
Name: Howard W. Lutnick                       Name: Jeffrey M. Chertoff
Title: Chairman of the Board,                 Title: Senior Vice President and
Chief Executive Officer and President         Chief Financial Officer
Date: November 13, 2003                       Date: November 13, 2003