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Altair GraphQL ClientNitro
Freemium

The client is free and open source; Altair GraphQL Cloud is an optional hosted service.

 Freemium

Free to start, with paid options for teams on the ChilliCream platform.

Windows, macOS, Linux, Web, Browser extension macOS, Web
  • Schema docs search with one-click query generation
  • Environments, pre-request scripts and file uploads
  • Dedicated environment for exploring and querying GraphQL APIs
  • Works alongside Hot Chocolate and Fusion on .NET
  • Focused on GraphQL only, not general REST testing
  • Team sync features rely on the separate cloud service
  • Focused on GraphQL rather than REST or other APIs
  • Product site is aimed mainly at enterprise platform users
Downloadable app, Browser extension Downloadable app, Web application
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

Checked September 23, 2026

Checked October 2, 2026

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