10 open-source Postman alternatives

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

1. 1IInsomniainsomnia.restThe Collaborative API Development Platform$12–$45/user/moFree planOpen sourceSelf-hostable
2. 2HHoppscotchhoppscotch.ioOpen source API development ecosystemOpen source
3. 3FFirecampfirecamp.ioGet instant API playgrounds to test Rest, GraphQL, WebSocket and SocketIO APIsFrom $59/moFree planOpen sourceSelf-hostable
4. 4BBrunousebruno.comThe Git-Native API Client$6–$11/moFree planOpen source
5. 5WWebMaestrogetwebmaestro.comOpen Source REST API ClientFree planOpen source
6. 6AApiArkapiark.devNo Login. No Cloud. No Bloat.FreeOpen source
7. 7SSoapUIsoapui.orgThe simplest and easiest way to begin your API testing journeyFree planOpen source
8. 8KKeploykeploy.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
9. 9SStep CIstepci.comAutomate API Testing with our open-source API Test Automation frameworkFree planOpen sourceSelf-hostable
10. 10AAPI Dashapidash.devTest, Visualize & Integrate APIs in a Dash ⚡️Free planOpen source

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