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Yaak vs Milkman: catalog facts
Yaak	Milkman
Freemium Yaak is MIT licensed and free to build and use. Development is funded by…	Free Free and open source.
Windows, macOS, Linux	Windows, macOS, Linux
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	Plugins for REST, GraphQL, gRPC, Socket.IO and databases Git-based sync of collections
A much younger project than Postman, with a smaller community No hosted collaboration features if that is what you actually want	Smaller community than mainstream API clients Documentation lives mainly in the repository
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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