6 self-hostable Postman alternatives

ranked by how closely each fits what Postman does · Postman itself has a free plan

1. 1AApidogapidog.comREAL API Design-first Development Platform. Design. Debug. Test. Document. Mock. Build APIs Faster & Together.$9–$27/user/moFree planSelf-hostable
2. 2IInsomniainsomnia.restThe Collaborative API Development Platform$12–$45/user/moFree planOpen sourceSelf-hostable
3. 3FFirecampfirecamp.ioGet instant API playgrounds to test Rest, GraphQL, WebSocket and SocketIO APIsFrom $59/moFree planOpen sourceSelf-hostable
4. 4KKeyRunnerkeyrunner.appTurn existing APIs into governed AI tools in under 5 minutes. Give agents capability, not credentials.From $49/user/moFree planSelf-hostable
5. 5KKeploykeploy.ioAI-powered testing platform: generate tests, mocks, and sandboxes from real API traffic. Any language. 90% coverage in minutes — no code changes.From $19/user/moFree planOpen sourceSelf-hostable
6. 6SStep CIstepci.comAutomate API Testing with our open-source API Test Automation frameworkFree planOpen sourceSelf-hostable

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