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websocat vs Kreya: catalog facts
websocat	Kreya
Free Free and open source.	Freemium A free tier is available. Advanced features require a paid licence.
Command line	Windows, macOS, Linux
Quick interactive testing of WebSocket endpoints Works in pipes and shell scripts	One of the few desktop clients with proper gRPC and server reflection support Projects are Git-friendly local files rather than cloud documents
Command line only Advanced options take time to learn	Some features require a paid licence Smaller community than the mainstream API clients
Downloadable app	Downloadable app
Open 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	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.