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Yaak vs Warthog: catalog facts
Yaak	Warthog
Freemium Yaak is MIT licensed and free to build and use. Development is funded by…	Free Free to download from GitHub.
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	Automatic parsing of proto definitions into input forms Several authentication methods, including JWT and GCE
A much younger project than Postman, with a smaller community No hosted collaboration features if that is what you actually want	gRPC only, no REST or GraphQL Small project with a small user base
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	No account 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 September 24, 2026

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