Review: Approved by the U.S. Postal Service, Stamps.com offers a software-only postage service that lets you buy and print postage online. Stamps.com offers you a secure Internet mailing solution to print postage using your existing PC, printer and Internet connection without having to go to the Post Office. Everyone can enjoy the convenience of online postage and avoid waiting in line at the Post Office. Stamps.com is the leading provider of Internet-based postage solutions with over 400,000 monthly subscribers. You can also put your own photo images on stamps, here.