STAMPS.COM LAUNCHES E-COMMERCE STRATEGY WITH SUITE OF TOOLS FOR INTERNET-BASED SHIPPING

Announces Services for E-tailers, Auction Sites, Commerce Service Providers,
and Business-to-Business Marketplaces

SANTA MONICA, Calif. – April 3, 2000 – Stamps.com™ (Nasdaq: STMP), the leading provider of Internet mailing and shipping services, today announced a set of Web tools – the Price It API™, Track It API™ and Sell It API™ – that will enable e-commerce companies to turn shipping operations from a cost center to profit center, provide multiple delivery options to buyers, and reduce customer service costs. Available to pre-release customers today, the tools are already allowing e-commerce companies like Agillion, AuctionWatch.com, Concur Technologies Inc. (Nasdaq: CNQR), and NetLedger to seamlessly integrate Stamps.com shipping technology into next-generation Web sites.

The technology is an innovative suite of application programming interfaces (APIs) that address the various parts of the shipping process for online buyers and sellers. Price It is a dynamic rating tool, which compares carrier services by estimated delivery date, times and service charges. With the Track It tool, online buyers can track the package from order to delivery and obtain information on dates, times and location of the package in transit. Sell It is a specific tool for auctions and exchanges that allows sellers to create profiles of carriers, rates and delivery terms for each item being sold.

“Hundreds of thousands of packages are delivered each day from e-tailers, shopping carts, auction sites and business-to-business exchanges,” said Kim Parks, general manager of the E-Commerce Strategic Business Unit at Stamps.com. “With our API tools, Stamps.com is in a perfect position to capitalize on the explosive growth of e-commerce shipments, wherever they originate. The overwhelming interest in this technology by leading Internet companies only solidifies our entry into the e-commerce market.”

“These APIs allow us to integrate Stamps.com shipping tools more deeply into our Web site to simplify the shipping process for the businesses and individuals using our comprehensive services,” said Rodrigo Sales, CEO of AuctionWatch.com, the leading provider of services for online auctions and dynamic pricing. “The tools allow online sellers to get more reliable margins on each transaction. They also eliminate extra steps and communication in an auction because the buyer and seller automatically agree on exact shipping charges at the time of purchase and can easily track the shipment in route.”

The Price It, Track It and Sell It APIs are easily integrated with diverse Internet applications, including online shopping carts, consumer auctions, business-to-business exchanges, sales force automation software, and customer relationship management systems. Customers need only integrate the Stamps.com APIs to access the complete range of services from United Parcel Service (UPS), US Postal Service (USPS), FedEx, Airborne Express, Yellow Freight, and any new carriers added by Stamps.com. The Stamps.com Web tools are based on eXtensible Markup Language (XML), the Internet standard for data interchange and application interoperability.

The tools will be made available later this quarter. Qualified customers may participate in the pre-release program today. For more information, contact the Stamps.com E-Commerce Business Unit.

About Stamps.com

Stamps.com™ is the leading provider of easy, convenient and cost-effective Internet mailing and shipping services for small businesses, large corporations and e-commerce vendors. Anchored by its partnerships with the U.S. Postal Service and United Parcel Service (UPS), Stamps.com’s customers can choose the best carrier for any transaction based on cost comparisons and delivery options. With just an Internet connection, Stamps.com customers will have immediate access to select a carrier, print postage or multi-carrier shipping labels, schedule a pick-up and track a package.

Stamps.com has partnerships with major companies such as America Online, eBay, Hewlett-Packard, IBM, Intel, Mail Boxes Etc., Microsoft, Office Depot, Intuit and 3M. Visit sdcmainprod.wpengine.com for more information.

###

“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, 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 fiscal year ended December 31, 1999. 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, the Price It, Track It, and Sell It logos are trademarks of Stamps.com Inc. All other brands and names are property of their respective owners.