Compare software

MQTT5 Explorermqtt-spy
Free

Free and open source under the GPL-3.0 licence.

 Free

Free and open source under the Eclipse Public License.

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

Checked October 1, 2026

Checked October 2, 2026

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