HiveMQ vs Mosquitto | Unicorn Factories

Overview

Both HiveMQ and Mosquitto implement the MQTT protocol for IoT messaging, but they target different deployment scenarios and scales.

Feature comparison

Capability	HiveMQ	Mosquitto
License	Apache 2.0 (CE)	EPL/EDL dual license
Clustering	Enterprise only	Via external tools
MQTT 5 support	Full	Full
WebSocket support	Built-in	Built-in
Memory footprint	Higher (JVM)	Lower (native C)
Enterprise support	Available	Via Cedalo

When to choose HiveMQ

You need horizontal clustering out of the box
Professional support and SLAs are required
You want a managed cloud option (HiveMQ Cloud)
Your team has Java expertise for plugin development

When to choose Mosquitto

You need the smallest possible resource footprint
You're deploying to constrained edge devices
You want a simpler, battle-tested codebase
You prefer C-based tooling

Can they coexist?

Yes. Many deployments use Mosquitto at the edge (lightweight, low resource) and HiveMQ in the cloud (clustering, high availability) with MQTT bridging between them.