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Scalar API ClientHoppscotch
Freemium

The open-source client is free; the wider Scalar platform has commercial offerings.

 Freemium

Free and open source under the MIT licence, including self-hosting. A paid cloud plan…

Web Windows, macOS, Linux, Web, Self-hosted, Browser extension
  • Understands OpenAPI descriptions
  • Open source on GitHub
  • Opens in a browser tab with nothing to install
  • HTTP, GraphQL, WebSocket, Server-Sent Events, Socket.IO and MQTT
  • The website focuses on the commercial docs and SDK platform rather than the client
  • Most useful when an OpenAPI description exists
  • The browser version needs an extension or the desktop app to reach local services
  • Team collaboration features are the paid part
Web application Web application, Downloadable app, Self-hosted, Browser extension
Open source Open source
License not stated License: MIT
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 23, 2026

Checked September 21, 2026

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