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Hoppscotch vs Resonance: catalog facts
Hoppscotch	Resonance
Freemium Free and open source under the MIT licence, including self-hosting. A paid cloud plan…	Free Free and open source under the MIT licence.
Windows, macOS, Linux, Web, Self-hosted, Browser extension	Linux
Opens in a browser tab with nothing to install HTTP, GraphQL, WebSocket, Server-Sent Events, Socket.IO and MQTT	No account, cloud sync or telemetry Collections stored as plain YAML files
The browser version needs an extension or the desktop app to reach local services Team collaboration features are the paid part	Younger and smaller than Postman or Insomnia No built-in sync for sharing collections across a team
Web application, Downloadable app, Self-hosted, Browser extension	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 1, 2026

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