Compare software

Yaak vs TestMace: catalog facts
Yaak	TestMace
Freemium Yaak is MIT licensed and free to build and use. Development is funded by…	Free Distributed as freeware.
Windows, macOS, Linux	Windows, macOS, Linux, Command line
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	Graphical test editor alongside JavaScript tests Variables, authentication and API import
A much younger project than Postman, with a smaller community No hosted collaboration features if that is what you actually want	Closed source The site gives no release dates or changelog
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License: Freeware
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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