Home Assistant 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.
Home Assistant
Open-source home automation that puts privacy first
VS
Z-Wave JS UI
Full-featured Z-Wave control panel and MQTT gateway
| Feature | Home Assistant | Z-Wave JS UI |
|---|---|---|
| Deploy effort | ≈5-minute setup | Under-an-hour setup |
| Health score | 100 · Excellent | 83 · Excellent |
| Category | Home Automation | Home Automation |
| License | Apache-2.0 | MIT |
| Language | Python | Vue |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 256 MB |
| Deployment | docker, bare-metal, one-click | docker, bare-metal |
| GitHub stars | ★ 91,123 | ★ 1,239 |
| First released | 2013 | 2018 |
| Replaces | SmartThings, Google Home | SmartThings |
What are Home Assistant and Z-Wave JS UI?
Home Assistant
Home Assistant is an open-source home automation platform that integrates thousands of smart devices and runs automations locally. It targets anyone wanting private, vendor-neutral smart home control. It is deployed as an OS image, Docker, or supervised install.
- Integrates thousands of devices
- Local-first automations
- Add-on ecosystem
- Powerful dashboards
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
Home Assistant vs Z-Wave JS UI: key differences
Home Assistant is written in Python, while Z-Wave JS UI is built with Vue. Licensing differs — Apache-2.0 for Home Assistant 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 Home Assistant. Home Assistant is the more established project (first released 2013), while Z-Wave JS UI arrived in 2018. Home Assistant has the considerably larger community, at 91,123 GitHub stars versus 1,239.
Why pick each one
Choose Home Assistant if…
- Huge device support
- Local control and privacy
- Very active community
Watch out for
- Learning curve for automations
- Occasional breaking updates
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 Home Assistant or Z-Wave JS UI better?
Neither is universally better. Home Assistant has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are Home Assistant and Z-Wave JS UI free and open-source?
Yes. Home Assistant is licensed under Apache-2.0 and Z-Wave JS UI under MIT. Both can be self-hosted at no software cost.
Can I run Home Assistant and Z-Wave JS UI with Docker?
Home Assistant: yes. Z-Wave JS UI: yes.
Which is lighter on resources, Home Assistant 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 Home Assistant. Real-world usage depends on library size, user count, and enabled features.