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HoppscotchHello HTTP
Freemium

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

 Free

Free and open source under the Apache 2.0 licence.

Windows, macOS, Linux, Web, Self-hosted, Browser extension Windows, macOS, Linux
  • Opens in a browser tab with nothing to install
  • HTTP, GraphQL, WebSocket, Server-Sent Events, Socket.IO and MQTT
  • Supports HTTP, WebSocket, GraphQL subscriptions and gRPC
  • Desktop app rather than a cloud service
  • The browser version needs an extension or the desktop app to reach local services
  • Team collaboration features are the paid part
  • Built mainly around one developer's needs
  • Smaller ecosystem than Postman or Insomnia
Web application, Downloadable app, Self-hosted, Browser extension Downloadable app
Open source Open source
License: MIT License: Apache-2.0
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 21, 2026

Checked October 2, 2026

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