head to head · open source
OpenMQTTGateway vs domoticz
OpenMQTTGateway has 4,094 GitHub stars, 906 forks, 48 open issues and last shipped today. domoticz has 3,810 stars, 1,160 forks, 24 open issues and last shipped 4 days ago. OpenMQTTGateway leads on adoption by 7% (4,094 vs 3,810 stars). OpenMQTTGateway is written in C++ under GPL-3.0; domoticz is written in C++ under GPL-3.0. OpenMQTTGateway has attracted 22% as many forks as stars, domoticz 30%. OpenMQTTGateway was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (home-automation), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| OpenMQTTGateway | domoticz | |
|---|---|---|
| GitHub stars | ★ 4.1K | ★ 3.8K |
| License | GPL-3.0 | GPL-3.0 |
| Written in | C++ | C++ |
| Last push | 2026-09-20 | 2026-09-16 |
| Forks | ⑂ 906 | ⑂ 1.2K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick OpenMQTTGateway if
- You weight community size — 4.1K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches C++
- You value the larger contributor base for long-term maintenance
pick domoticz if
- You want the domoticz feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches C++
- You evaluated both and domoticz fits your workflow better
About OpenMQTTGateway
OpenMQTTGateway is an open source C++ gateway firmware for ESP8266 and ESP32 boards that connects local radio and sensor protocols to MQTT. It lives in the home automation ecosystem and is associated with Home Assistant, OpenHAB, NodeRed, and AWS IOT. The project aims to unify various technologies and protocols into a single firmware, reducing the need for multiple physical bridges.
read the full OpenMQTTGateway overview →
About domoticz
Domoticz is free open source home automation system for Linux, Windows, macOS, FreeBSD, Raspberry Pi, ARM boards. It monitors and controls lights, switches, sensors for temperature, rain, wind, UV, energy, gas, water. It lives in IoT and home automation ecosystem, using HTML5 web frontend and hardware integrations such as Z Wave, Zigbee, MQTT, Philips Hue, RFXCOM. It is written in C++ and licensed GPL 3.0.
read the full domoticz overview →
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Frequently asked questions
Is OpenMQTTGateway or domoticz more popular?
OpenMQTTGateway has 4,094 GitHub stars and domoticz has 3,810. OpenMQTTGateway has the larger community by that measure.
Are OpenMQTTGateway and domoticz free?
Both are open source. OpenMQTTGateway is licensed under GPL-3.0 and domoticz under GPL-3.0. Neither carries a licence fee.
What is the difference between OpenMQTTGateway and domoticz?
OpenMQTTGateway is written in C++ and domoticz in C++. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, OpenMQTTGateway or domoticz?
Choose OpenMQTTGateway if you want the larger community (4,094 stars) or its GPL-3.0 licence terms. Choose domoticz if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.