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HoppscotchRestfox
Freemium

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

 Free

Free and open source.

Windows, macOS, Linux, Web, Self-hosted, Browser extension Web
  • Opens in a browser tab with nothing to install
  • HTTP, GraphQL, WebSocket, Server-Sent Events, Socket.IO and MQTT
  • Lightweight and quick to open
  • Works offline
  • The browser version needs an extension or the desktop app to reach local services
  • Team collaboration features are the paid part
  • Fewer collaboration and automation features than larger API platforms
Web application, Downloadable app, Self-hosted, Browser extension Downloadable app, Web application
Open source Open source
License: MIT License not stated
No account needed Not stated if an account is needed
Works offline Works offline

Checked September 21, 2026

Checked September 23, 2026

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