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Yaak vs Restfox: catalog facts
Yaak	Restfox
Freemium Yaak is MIT licensed and free to build and use. Development is funded by…	Free Free and open source.
Windows, macOS, Linux	Web
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	Lightweight and quick to open Works offline
A much younger project than Postman, with a smaller community No hosted collaboration features if that is what you actually want	Fewer collaboration and automation features than larger API platforms
Downloadable app	Downloadable app, Web application
Open source	Open source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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