STAMPS.COM INTEGRATES WITH osCOMMERCE®

LOS ANGELES-August 10, 2010-Stamps.com® (Nasdaq:STMP), the leading provider of USPS® postage online and shipping software solutions to approximately 400,000 customers, today announced its new shipping integration with osCommerce®, a leading provider of open source shopping cart software. Available since March 2000, osCommerce currently powers nearly 12,000 e-commerce sites worldwide.

The osCommerce shopping cart shipping integration is offered at no additional charge to new and existing Stamps.com customers. It allows osCommerce users to print pre-paid USPS shipping labels for all mail classes-including Media Mail® and First Class International Mail®-and automatically posts tracking numbers and mail class information back to the osCommerce store.

“Stamps.com is pleased to offer an integration with this dynamic shopping cart solution,” said Stamps.com president and CEO Ken McBride. “osCommerce ensures that setting up e-commerce sites is quick and easy, and now Stamps.com ensures that the shipping process is quick and easy for osCommerce users as well.”

About Stamps.com
Stamps.com (Nasdaq: STMP) is a leading provider of Internet-based postage services. Stamps.com’s service enables small businesses, high-volume shippers, enterprise shippers, and consumers to print U.S. Postal Service-approved postage with just a PC, printer and Internet connection, right from their home or office. The Company targets its services to small businesses and home offices, and currently has PC Postage partnerships with Avery Dennison, Microsoft, HP, Office Depot, USPS and others.

About osCommerce
osCommerce is an online shop e-commerce solution that offers a wide range of out-of-the-box features that allows online stores to be setup quickly with ease, and is available for free as an Open Source based solution released under the GNU General Public License.

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

Stamps.com Investor Contact:
Stamp.com Investor Relations
(310) 482-5830
http://investor.stamps.com

Press Contact:
Dena Cook
Brew Media Relations
(310) 526-8576
[email protected]