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Warthog vs Evans: catalog facts
Warthog	Evans
Free Free to download from GitHub.	Free Free and open source under the MIT licence.
Windows, macOS, Linux	Command line
Automatic parsing of proto definitions into input forms Several authentication methods, including JWT and GCE	Interactive REPL for exploring gRPC services Guided input of request fields
gRPC only, no REST or GraphQL Small project with a small user base	gRPC only No graphical interface
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	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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