Stamps.com is a leading provider of internet-based postage services. Its online postage service enables both businesses and consumers to print U.S. Postal Service–approved postage. Integrating with Stamps.com, Unify automatically pulls orders from all your online stores, platforms, and marketplaces to instantly generate USPS labels, print customized packing slips, provide tracking information, and much more. Unify seamlessly integrates with your Stamps.com account so you can directly access UPS or Stamps.com services without logging into additional applications.