Stamps.com to Present at B. Riley & Co. Investor Conference in New York City

SANTA MONICA, Calif. – August 10, 2004 – Stamps.com™ (Nasdaq: STMP) will be presenting at the Fifth Annual B. Riley & Co. Investor Conference at the New York Hilton in New York City on Thursday August 12, 2004. The Company will be presenting at 11:30 a.m. ET (8:30 a.m. PT). A webcast will accompany the presentation and will be available during the presentation and archived thereafter. The webcast can be accessed via the Stamps.com Investor Relations website at http://investor.stamps.com.

About Stamps.com

Stamps.com (Nasdaq: STMP) is a leading provider of Internet-based postage services. Stamps.com enables customers to print U.S. Postal Service-approved postage with just a PC, printer and Internet connection. The company targets its services to small businesses, home offices, and individuals, and currently has partnerships with companies including Auctionwatch, CompUSA, Earthlink, HP, Microsoft, NCR, Office Depot, PayPal and the U.S. Postal Service.

“Safe Harbor” Statement under the Private Securities Litigation Reform Act of 1995: This release may contain forward-looking statements that involve risks and uncertainties. Important factors, including the company’s ability to complete its products and obtain regulatory approval, which could cause actual results to differ materially from those in the forward-looking statements, are detailed in filings with the Securities and Exchange Commission made from time to time by Stamps.com, including its Annual Report on Form 10-K for the fiscal year ended December 31, 2001, its subsequent Quarterly Reports on Form 10-Q, and its Current Reports on Form 8-K. Stamps.com undertakes no obligation to release publicly any revisions to any forward-looking statements to reflect events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

Stamps.com, the Stamps.com logo and NetStamps are trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.