Postman

Postman is a software company that builds an API platform, with features meant to simplify each step of building an API and make collaboration easier so teams can produce better APIs faster. APIs are the interfaces that let software systems exchange data, and the work of designing, testing, documenting and governing them is usually spread across development, QA and platform teams, a coordination problem that API lifecycle platforms are built to address.

Postman started as a side project to simplify API testing, and the platform has since grown to cover API discovery, test generation, mock servers, monitoring of live endpoints, CI integration and performance testing. It is available as a desktop application and as a command-line tool that AI agents can install. The company's product line also extends into AI agent workflows: the Context Graph maps an organization's APIs for agents, Fabric acts as a gateway for AI, MCP and API traffic, Astropods runs and controls agents in production, Fern handles docs and SDKs, and Passport is a credential proxy that lets callers use approved APIs without holding the secrets. Several of these products center on governance and security, areas that matter more as autonomous agents begin to call internal APIs.

More than 40 million developers and 500,000 organizations around the world use Postman, and its customers come from a wide range of industries, including insurance. The company is headquartered in San Francisco and has offices in Bangalore, where it was founded, and Tokyo, with a hybrid team spread across several continents. Its stated values include curiosity, transparency, embracing constraints and learning from mistakes.