Postman is an API platform where developers design, build, test and manage APIs. Postman also offers a command-line tool (Postman CLI), AI features such as Agent Mode and a public directory of APIs, the Postman API Network. The service is delivered as a cloud service (SaaS) with a desktop app; for control over hosting location, Postman mentions a Private Cloud offering available through sales.
Postman, Inc. is a US company headquartered in San Francisco, privately held, and falls under US jurisdiction, including the CLOUD Act. Postman has no data centres of its own and uses AWS. Its security page states that product data and backups are hosted on AWS servers in the EU and the US. Enterprise customers can opt for an EU data residency instance in Frankfurt (eu-central-1), which keeps user data and the control plane (logs, metrics, key management) in the EU. Some features are unavailable there, and Postman Echo is hosted in the US. The product is proprietary and not open source.