Open source alternatives to Postman
4 free tools that do the job of Postman, most stars first. Of these, 1 is a web app you can run on your own server and 3 are programs you install on your computer.
4 alternatives
Sorted by most stars.-
Hoppscotch
A lightweight API client in the browser.
Web app
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Bruno
A fast API client that keeps collections as files you can commit to git.
Program you run on your computer
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Insomnia
An API client for REST, GraphQL and gRPC, with design and testing tools.
Program you run on your computer
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Yaak
A desktop API client for REST, GraphQL, WebSockets and gRPC.
Program you run on your computer
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Ask us to add itAbout these numbers. Stars, dates and licenses come from GitHub through ecosyste.ms, collected on 10 Nov 2026; they can lag GitHub by a few days. A project is listed only if it has 300 or more stars, was updated in the last 12 months and states a license. A listing is not an endorsement, and we have not tested these tools on Antideploy yet. Logos belong to their projects and companies and are shown only to say which is which.