Compare software

mqtt-spyMQTT5 Explorer
Free

Free and open source under the Eclipse Public License.

 Free

Free and open source under the GPL-3.0 licence.

Windows, Command line Linux
  • Both a desktop interface and a headless daemon
  • Focused on monitoring MQTT topic activity
  • Aims to support all MQTT 5 features
  • Works with any MQTT broker
  • No packaged releases on the GitHub repository
  • Little recent development activity
  • Small project with a limited community
  • Release activity is not clear from the repository page
Downloadable app Downloadable app
Open source Open source
License: EPL-1.0 License: GPL-3.0-only
No account needed No account needed
Not stated if it works offline Not stated if it works offline

Checked October 2, 2026

Checked October 1, 2026

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