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Kreya vs Altair GraphQL Client: catalog facts
Kreya	Altair GraphQL Client
Freemium A free tier is available. Advanced features require a paid licence.	Freemium The client is free and open source; Altair GraphQL Cloud is an optional hosted service.
Windows, macOS, Linux	Windows, macOS, Linux, Web, Browser extension
One of the few desktop clients with proper gRPC and server reflection support Projects are Git-friendly local files rather than cloud documents	Schema docs search with one-click query generation Environments, pre-request scripts and file uploads
Some features require a paid licence Smaller community than the mainstream API clients	Focused on GraphQL only, not general REST testing Team sync features rely on the separate cloud service
Downloadable app	Downloadable app, Browser extension
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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