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Altair GraphQL Client vs Kreya: catalog facts
Altair GraphQL Client	Kreya
Freemium The client is free and open source; Altair GraphQL Cloud is an optional hosted service.	Freemium A free tier is available. Advanced features require a paid licence.
Windows, macOS, Linux, Web, Browser extension	Windows, macOS, Linux
Schema docs search with one-click query generation Environments, pre-request scripts and file uploads	One of the few desktop clients with proper gRPC and server reflection support Projects are Git-friendly local files rather than cloud documents
Focused on GraphQL only, not general REST testing Team sync features rely on the separate cloud service	Some features require a paid licence Smaller community than the mainstream API clients
Downloadable app, Browser extension	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.