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Hoppscotch vs MQTTX: catalog facts
Hoppscotch	MQTTX
Freemium Free and open source under the MIT licence, including self-hosting. A paid cloud plan…	Free Free to download and use.
Windows, macOS, Linux, Web, Self-hosted, Browser extension	Windows, macOS, Linux, Web, Self-hosted, Command line
Opens in a browser tab with nothing to install HTTP, GraphQL, WebSocket, Server-Sent Events, Socket.IO and MQTT	Desktop, CLI and web versions share one workflow Supports MQTT 5.0, 3.1.1 and 3.1
The browser version needs an extension or the desktop app to reach local services Team collaboration features are the paid part	Focused on MQTT only, not general HTTP APIs Some features steer toward the EMQX ecosystem
Web application, Downloadable app, Self-hosted, Browser extension	Downloadable app, Web application, Self-hosted
Open source	Open source
License: MIT	License not stated
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 September 24, 2026

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