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

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