Stamps.com, Inc. provides Internet-based mailing and shipping solutions. It enables small businesses, enterprises, and online retailers to print U.S. Postal Service-approved postage. The firm operates under following segments: Stamps.com and MetaPack. The Stamps.com segment derives revenue from external customers from offering postage online and shipping software solutions offered to consumers, small businesses, e-commerce shippers, enterprise mailers, and high volume shippers. The MetaPack segment consists of the operations of MetaPack which derives revenues from external customers from offering multi-carrier enterprise-level shipping software solutions to large e-commerce retailers and brands. The company was founded by James Alastair Campbell McDermott, Jeff Green and Air R. Engelberg in September 1996 and is headquartered in El Segundo, CA.