eSpeed to Hold 4th Annual Charity Day on September 12th; 100% of Revenues to Benefit Victims of Hurricane Katrina and 9/11 Families.

NEW YORK -- eSpeed, Inc. (NASDAQ: ESPD), a leading developer of electronic marketplaces and trading technology for the global capital markets, announced today plans for their fourth annual Charity Day. The Company will donate 100% of its revenues from Monday, September 12, 2005, to The Cantor Fitzgerald Relief Fund, 50% of which will be donated to the children and families of those injured or killed by Hurricane Katrina and 50% of which will be given directly to the children and families of employees lost on September 11, 2001.

eSpeed said that many employees worldwide have also agreed to donate their pay for that day to be added to the proceeds.

Howard W. Lutnick, Chairman and CEO of eSpeed, commented, "Hurricane Katrina has brought an enormous need to thousands of families. eSpeed recognizes this need and understands from first-hand experience the importance of providing direct assistance to those affected. As a firm, eSpeed has received tremendous support from all over the world, and we believe we are in a position to give back to others the generosity we have been shown. We are committed to working with our clients and employees on September 12 to offer direct aid and address this immediate need."

Edie Lutnick, Executive Director of The Cantor Fitzgerald Relief Fund, added, "The Cantor Fitzgerald Relief Fund is working hard to raise money to assist the children and families of the victims of this horrible tragedy. Like our fundraising for the 9/11 families, donations will be given directly to the victims of Hurricane Katrina, without any deductions for administrative expenses."

On September 19, 2001, Cantor Fitzgerald made a pledge to distribute 25% of the firm's profits for five years and providing ten years of healthcare for the benefit of the families and loved ones of its 658 Cantor Fitzgerald, eSpeed and TradeSpark employees lost on 9/11. To date, the Cantor Fitzgerald Relief Fund has raised and distributed over USD 150 million to approximately 800 families and 950 children.

For more information on the September 12th Charity Day and The Cantor Fitzgerald Relief Fund, please visit www.cantorrelief.org. To make a donation, please send checks to The Cantor Fitzgerald Relief Fund, 110 East 59th St., 5th Fl., New York, NY 10022 or call Marianna Taaffe at 212-829-4770.

About The Cantor Fitzgerald Relief Fund

The Cantor Fitzgerald Relief Fund was established on September 14, 2001 as a result of the tragedy at the World Trade Center on September 11, 2001. The goal of the fund is to provide direct assistance to those who lost loved ones in the tragedy. 100% of the money donated to the Cantor Fitzgerald Relief Fund is disbursed directly to the families and loved ones. Since its establishment, Cantor Fitzgerald and the Cantor Fitzgerald Relief Fund have provided approximately USD 150 million in financial support for the families and loved ones of the 658 victims. The Cantor Fitzgerald Relief Fund also provides assistance to the fiances and loved ones of these victims and to the families of victims from 14 other companies, including Forte Foods, Forest Electric, and to non-Cantor related independent contractors such as Citibank, GDI InfoTech and others who perished in the terrorist attacks. In total over 800 families, and loved ones are served by the Cantor Fitzgerald Relief Fund. Howard Lutnick and the partners of Cantor Fitzgerald underwrite the expenses of the fund, which is staffed by extraordinary volunteers so that each and every dollar raised goes directly to victims' families and loved ones.

About eSpeed, Inc.

eSpeed, Inc. (NASDAQ: ESPD) is the leader in developing and deploying electronic marketplaces and related trading technology that offers traders access to the most liquid, efficient and neutral financial markets in the world. eSpeed operates multiple buyer, multiple seller real-time electronic marketplaces for the global capital markets, including the world's largest government bond markets and other fixed income and equities marketplaces. eSpeed's suite of marketplace tools provides end-to-end transaction solutions for the purchase and sale of financial and non-financial products over eSpeed's global private network or via the Internet. eSpeed's neutral platform, reliable network, straight-though processing and superior products make it the trusted source for electronic trading at the world's largest fixed income and foreign exchange trading firms and major exchanges. To learn more, please visit www.espeed.com.

The information in this press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such statements are based upon current expectations that involve risks and uncertainties. Any statements contained herein that are not statements of historical fact may be deemed to be forward-looking statements. Our actual results and the timing of certain events may differ significantly from the results discussed in the forward-looking statements. Factors that might cause or contribute to such a discrepancy include, but are not limited to, the costs and expenses of developing, maintaining and protecting our intellectual property, including judgments or settlements paid or received and their related costs, the possibility of future losses and negative cash flow from operations, the effect of market conditions, including trading volume and volatility, our pricing strategy and that of our competitors, our ability to develop new products and services, to enter new markets, to secure and maintain market share, to enter into marketing and strategic alliances, to hire new personnel, to expand the use of our electronic system, to induce clients to use our marketplaces and services and to effectively manage any growth we achieve, the effects of the attacks on the World Trade Center on September 11, 2001, and other factors that are discussed under "Risk Factors" in eSpeed's Annual Report on Form 10-K filed with the Securities and Exchange Commission. We believe that all forward-looking statements are based upon reasonable assumptions when made; however, we caution that it is impossible to predict actual results or outcomes or the effects of risks, uncertainties or other factors on anticipated results or outcomes and that, accordingly, you should not place undue reliance on these statements. Forward-looking statements speak only as of the date when made, and we undertake no obligation to update these statements in light of subsequent events or developments. Actual results and outcomes may differ materially from anticipated results or outcomes discussed in forward-looking statements.