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TestMaceYaak
Free

Distributed as freeware.

 Freemium

Yaak is MIT licensed and free to build and use. Development is funded by…

Windows, macOS, Linux, Command line Windows, macOS, Linux
  • Graphical test editor alongside JavaScript tests
  • Variables, authentication and API import
  • Requests are stored as files on your machine, so a git repository is the shared collection
  • REST, GraphQL, gRPC, WebSocket and Server-Sent Events in one client
  • Closed source
  • The site gives no release dates or changelog
  • A much younger project than Postman, with a smaller community
  • No hosted collaboration features if that is what you actually want
Downloadable app Downloadable app
Closed source Open source
License: Freeware License: MIT
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.