About Postman Postman is the world’s leading API platform, used by more than 20 million developers and 500,000 organizations for building and using APIs.

Postman and Katalon are very popular options for manual API testing. Manual testing is very time-consuming; you can program automated testing, but that requires extra time and effort.

Postman Flows makes it simple to construct API applications without needing to write code or fiddle with a command line.

Discover why over 500,000 organizations and 98% of the Fortune 500 are using Postman to lead the future of API-driven AI development.