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Warthog vs Buf Studio: catalog facts
Warthog	Buf Studio
Free Free to download from GitHub.	Free Used on the Buf website; check Buf for current terms of the wider Schema Registry.
Windows, macOS, Linux	Web
Automatic parsing of proto definitions into input forms Several authentication methods, including JWT and GCE	Sends gRPC and Connect requests from a browser Works with schemas in the Buf Schema Registry
gRPC only, no REST or GraphQL Small project with a small user base	Limited to Protobuf-based APIs Few details on features or pricing in the available research
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 2, 2026

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