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Warthog vs Yaak: catalog facts
Warthog	Yaak
Free Free to download from GitHub.	Freemium Yaak is MIT licensed and free to build and use. Development is funded by…
Windows, macOS, Linux	Windows, macOS, Linux
Automatic parsing of proto definitions into input forms Several authentication methods, including JWT and GCE	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
gRPC only, no REST or GraphQL Small project with a small user base	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
Closed source	Open source
License not stated	License: MIT
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 21, 2026

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