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Side-by-side comparison

Pick up to four tools and compare adoption, momentum and maintenance at a glance. The crown marks the leader in each row.

Eclipse Paho

Family of MQTT client libraries for Python, C, Java and more; paho-mqtt is the default Python client.

Eclipse Mosquitto

Lightweight, ubiquitous open-source MQTT broker; the default choice for small deployments and gateways.

EMQX

Highly scalable Erlang MQTT 5 broker and platform with clustering, rule engine and data bridges.

MQTT.js

The standard MQTT client for Node.js and browsers (over WebSockets), supporting MQTT 3.1.1 and 5.

Head to head

Metric	Eclipse Paho	Eclipse Mosquitto	EMQX	MQTT.js
Stars	2.4k	11.3k	16.9k	9.1k
Weekly downloads	3M	n/a	n/a	3.6M
Download growth	+44%	n/a	n/a	+12%
Popularity score	71/100	74/100	77/100	77/100
Forks	751	2.7k	2.6k	1.5k
Open issues	128	920	266	45
Last commit	1w ago	5d ago	today	3w ago
Latest version	2.2.0Nov 4, 2026	n/a	n/a	5.16.1
First released	2015	2016	2012	2011
Signals	Popular	Popular	Popular	Popular
Listed in	Embedded & IoT › IoT Messaging & Protocols	Embedded & IoT › IoT Messaging & Protocols	Embedded & IoT › IoT Messaging & Protocols	Embedded & IoT › IoT Messaging & Protocols

Weekly downloads over time

Hover for exact values; switch to log scale for tools of very different sizes. Not shown (no comparable download data): Eclipse Mosquitto, EMQX, MQTT.js.

Eclipse Paho

Family of MQTT client libraries for Python, C, Java and more; paho-mqtt is the default Python client.

Eclipse Mosquitto

Lightweight, ubiquitous open-source MQTT broker; the default choice for small deployments and gateways.

EMQX

Highly scalable Erlang MQTT 5 broker and platform with clustering, rule engine and data bridges.

MQTT.js

The standard MQTT client for Node.js and browsers (over WebSockets), supporting MQTT 3.1.1 and 5.

Head to head

Metric	Eclipse Paho	Eclipse Mosquitto	EMQX	MQTT.js
Stars	2.4k	11.3k	16.9k	9.1k
Weekly downloads	3M	n/a	n/a	3.6M
Download growth	+44%	n/a	n/a	+12%
Popularity score	71/100	74/100	77/100	77/100
Forks	751	2.7k	2.6k	1.5k
Open issues	128	920	266	45
Last commit	1w ago	5d ago	today	3w ago
Latest version	2.2.0Nov 4, 2026	n/a	n/a	5.16.1
First released	2015	2016	2012	2011
Signals	Popular	Popular	Popular	Popular
Listed in	Embedded & IoT › IoT Messaging & Protocols	Embedded & IoT › IoT Messaging & Protocols	Embedded & IoT › IoT Messaging & Protocols	Embedded & IoT › IoT Messaging & Protocols

Weekly downloads over time

Hover for exact values; switch to log scale for tools of very different sizes. Not shown (no comparable download data): Eclipse Mosquitto, EMQX, MQTT.js.

Side-by-side comparison

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Weekly downloads over time

Head to head

Weekly downloads over time