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httpYacYaak
Free

Free to use.

 Freemium

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

Command line Windows, macOS, Linux
  • Plain-text request files that fit in version control
  • REST, SOAP, GraphQL and gRPC in one tool
  • 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
  • No standalone graphical app; works through the CLI or VS Code
  • Scripting requires familiarity with Node.js
  • 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
Open source Open source
License not stated License: MIT
No account needed No account needed
Works offline Works offline

Checked September 23, 2026

Checked September 21, 2026

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