EMQX
Scalable MQTT broker. Connect 100M+ IoT devices in one single cluster, move and process real-time IoT data with 1M msg/s throughput at 1ms latency.
High commit volume, frequent releases and growing activity.
Commit activity more than 97% of tracked projects; popularity more than 86%. How this is calculated.
Commits, last 11 months
| Stars | 17k |
|---|---|
| Latest release | 6.3.1 · 18 Sept 2026 |
| Repo updated | 25 Sept 2026 |
| Licence | Apache-2.0 |
| Built with | Docker, Erlang |
Is EMQX actively maintained?
Development is ongoing. The repository recorded 5869 commits over the same window, and the last three months alone account for 2494 of them.
Activity is accelerating: the last quarter carried 80% more commits than the one before it.
The most recent tagged release, 6.3.1, shipped within the last month — a current, installable version exists today.
Of the 20 projects we track in Internet of Things (IoT), EMQX ranks #2 by health score — in the top quarter of its category.
What EMQX actually does
EMQX is an open-source MQTT message broker designed to handle large-scale connections from Internet of Things devices. It facilitates real-time data ingestion and message routing across distributed server clusters.
Best fit: Deploying in industrial or enterprise environments that need to manage millions of concurrent MQTT client connections and high message throughput.
Worth knowing: Running large Erlang-based clusters requires deep expertise in distributed systems tuning, memory management, and network troubleshooting under high loads.
Deployment notes
You can deploy it using Docker containers, and you will typically need to configure persistent storage for retained messages as well as a reverse proxy to handle TLS termination for client connections.
EMQX as a replacement for
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