openHAB vs Z-Wave JS UI
A side-by-side comparison of two self-hosted home automation options — licensing, setup difficulty, resource needs, and what each one replaces.
openHAB
Vendor-neutral open-source home automation
VS
Z-Wave JS UI
Full-featured Z-Wave control panel and MQTT gateway
| Feature | openHAB | Z-Wave JS UI |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 79 · Good | 83 · Excellent |
| Category | Home Automation | Home Automation |
| License | EPL-2.0 | MIT |
| Language | Java | Vue |
| Setup difficulty | Hard | Medium |
| Min. RAM | 1,024 MB | 256 MB |
| Deployment | docker, bare-metal | docker, bare-metal |
| GitHub stars | ★ 1,142 | ★ 1,239 |
| First released | 2010 | 2018 |
| Replaces | SmartThings, Google Home | SmartThings |
What are openHAB and Z-Wave JS UI?
openHAB
openHAB is a vendor-neutral, open-source home automation platform that integrates many devices and technologies behind one system. It targets smart home enthusiasts wanting deep configurability. It is deployed via Docker or native packages.
- Hundreds of device bindings
- Powerful rule engine
- Runs fully offline
- Cross-platform
Z-Wave JS UI
Z-Wave JS UI is a web interface and MQTT gateway built on the Z-Wave JS driver for managing Z-Wave networks. It exposes devices to home automation platforms and provides a control panel for configuration.
- Z-Wave network management
- MQTT gateway
- Web control panel
- Firmware update support
openHAB vs Z-Wave JS UI: key differences
OpenHAB is written in Java, while Z-Wave JS UI is built with Vue. Licensing differs — EPL-2.0 for openHAB versus MIT for Z-Wave JS UI. Z-Wave JS UI is the lighter option, starting around 256 MB of RAM against 1,024 MB for openHAB. OpenHAB is the more established project (first released 2010), while Z-Wave JS UI arrived in 2018.
Why pick each one
Choose openHAB if…
- Very flexible
- Vendor neutral
- Mature project
Watch out for
- Steep learning curve
- Heavier Java runtime
Choose Z-Wave JS UI if…
- Excellent Z-Wave support
- Integrates with Home Assistant
Watch out for
- Requires a Z-Wave controller
- Z-Wave only
Frequently asked questions
Is openHAB or Z-Wave JS UI better?
Z-Wave JS UI is the stronger all-round pick: it has both the larger community and the simpler medium setup. Consider openHAB if its specific feature set fits your needs better.
Are openHAB and Z-Wave JS UI free and open-source?
Yes. openHAB is licensed under EPL-2.0 and Z-Wave JS UI under MIT. Both can be self-hosted at no software cost.
Can I run openHAB and Z-Wave JS UI with Docker?
openHAB: yes. Z-Wave JS UI: yes.
Which is lighter on resources, openHAB or Z-Wave JS UI?
Z-Wave JS UI has the smaller minimum footprint at 256 MB of RAM, compared to about 1,024 MB for openHAB. Real-world usage depends on library size, user count, and enabled features.