head to head · open source
OpenMQTTGateway vs OpenCCU
OpenMQTTGateway has 4,116 GitHub stars, 910 forks, 48 open issues and last shipped 17 days ago. OpenCCU has 1,854 stars, 225 forks, 189 open issues and last shipped yesterday. OpenMQTTGateway leads on adoption by 122% (4,116 vs 1,854 stars). OpenMQTTGateway is written in C++ under GPL-3.0; OpenCCU is written in JavaScript under Apache-2.0. OpenMQTTGateway has attracted 22% as many forks as stars, OpenCCU 12%. OpenCCU 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 | OpenCCU | |
|---|---|---|
| GitHub stars | ★ 4.1K | ★ 1.9K |
| License | GPL-3.0 | Apache-2.0 |
| Written in | C++ | JavaScript |
| Last push | 2026-10-19 | 2026-11-04 |
| Forks | ⑂ 910 | ⑂ 225 |
| 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 OpenCCU if
- You want the OpenCCU feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and OpenCCU fits your workflow better
About OpenMQTTGateway
OpenMQTTGateway aims to unify various technologies and protocols into a single firmware. This reduces the need for multiple physical bridges and streamlines diverse technologies under the widely used MQTT protocol. Sponsors Documentation The documentation is here New to OpenMQTTGateway? Follow the Getting Started guide to flash a board from your browser and see your first sensor data in about 15 minutes. The reference sheet, with the list of all functions, pinouts is here Upload Upload OpenMQTTGateway directly from the upload page (no additional software required) or build your own configuration with PlatformIO…
read the full OpenMQTTGateway overview →
About OpenCCU
Your flexible, cloud free Homematic IP® CCU smart home solution Deutschsprachiges 🇩🇪🇦🇹🇨🇭 ReadMe OpenCCU – formerly known as RaspberryMatic – is a free, non commercial, open source operating system for running a cloud free smart home hub compatible with eQ 3’s Homematic IP and HomeMatic devices. It targets 100% compatibility with the vendor’s CCU3 and can be installed directly on CCU3 and ELV Charly hardware. It also runs on common 64 bit capable SBCs (e.g., Raspberry Pi, Hardkernel ODROID, ASUS Tinkerboard 2/2S) and generic x86 64 or aarch64 hardware. In addition, OpenCCU is available as a pure virtual…
read the full OpenCCU overview →
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Frequently asked questions
Is OpenMQTTGateway or OpenCCU more popular?
OpenMQTTGateway has 4,116 GitHub stars and OpenCCU has 1,854. OpenMQTTGateway has the larger community by that measure.
Are OpenMQTTGateway and OpenCCU free?
Both are open source. OpenMQTTGateway is licensed under GPL-3.0 and OpenCCU under Apache-2.0. Neither carries a licence fee.
What is the difference between OpenMQTTGateway and OpenCCU?
OpenMQTTGateway is written in C++ and OpenCCU in JavaScript. 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 OpenCCU?
Choose OpenMQTTGateway if you want the larger community (4,116 stars) or its GPL-3.0 licence terms. Choose OpenCCU if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.