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grpcui vs Kreya: catalog facts
grpcui	Kreya
Free Free and open source under the MIT licence.	Freemium A free tier is available. Advanced features require a paid licence.
Web, Command line	Windows, macOS, Linux
Browser forms for calling gRPC methods Postman-style workflow for gRPC rather than REST	One of the few desktop clients with proper gRPC and server reflection support Projects are Git-friendly local files rather than cloud documents
Covers gRPC only, not REST or GraphQL Launched from the command line rather than as a desktop app	Some features require a paid licence Smaller community than the mainstream API clients
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 22, 2026

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