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Eclipse Mosquitto vs MQTT CLI: catalog facts
Eclipse Mosquitto	MQTT CLI
Best for: Home automation and IoT setups that need a self-hosted MQTT broker	Best for: Developers testing and debugging MQTT brokers and IoT messaging from a terminal
Free Free and open source under the EPL/EDL licences.	Free Free and open source under the Apache 2.0 licence, backed by HiveMQ.
Windows, Linux, Self-hosted, Command line	Windows, Command line
Supports MQTT 5.0, 3.1.1 and 3.1 Light enough for single-board computers All 4 strengths for Eclipse Mosquitto Supports MQTT 5.0, 3.1.1 and 3.1 Light enough for single-board computers Includes mosquitto_pub and mosquitto_sub command-line clients Ships a C client library	Full MQTT 5.0 and 3.1.1 feature support Interactive shell with syntax highlighting and command history All 4 strengths for MQTT CLI Full MQTT 5.0 and 3.1.1 feature support Interactive shell with syntax highlighting and command history Several clients connected to different brokers at the same time Built-in quick broker tests
A broker only, with no graphical interface for managing messages Requires familiarity with MQTT and broker configuration	Command line only, with no graphical interface Some commands only apply to HiveMQ brokers
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: EPL/EDL	License: Apache-2.0
No account needed	No account needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for Eclipse Mosquitto mosquitto.org Catalog checked October 2, 2026	Official website Full listing and sources Sources for MQTT CLI hivemq.github.io/mqtt-cli Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.