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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.

MQTT.js

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

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.

Eclipse Paho

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

Head to head

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

MQTT.js

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

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.

Eclipse Paho

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

Head to head

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

Side-by-side comparison

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Weekly downloads over time

Head to head

Weekly downloads over time