Home Assistant vs Zwave-JS Server
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
Zwave-JS Server
Small server wrapping the Z-Wave JS driver over WebSocket
| Feature | Home Assistant | Zwave-JS Server |
|---|---|---|
| Deploy effort | ≈5-minute setup | Under-an-hour setup |
| Health score | 100 · Excellent | 74 · Good |
| Category | Home Automation | Home Automation |
| License | Apache-2.0 | Apache-2.0 |
| Language | Python | TypeScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 128 MB |
| Deployment | docker, bare-metal, one-click | docker, binary |
| GitHub stars | ★ 91,123 | ★ 164 |
| First released | 2013 | 2021 |
| Replaces | SmartThings, Google Home | SmartThings |
What are Home Assistant and Zwave-JS Server?
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
Zwave-JS Server
Z-Wave JS Server is a small server that exposes the Z-Wave JS driver over a WebSocket API. It allows multiple clients, such as Home Assistant, to control a Z-Wave network simultaneously.
- WebSocket Z-Wave API
- Multi-client support
- Built on Z-Wave JS
- Lightweight server
Home Assistant vs Zwave-JS Server: key differences
Home Assistant is written in Python, while Zwave-JS Server is built with TypeScript. Zwave-JS Server is the lighter option, starting around 128 MB of RAM against 1,024 MB for Home Assistant. Home Assistant is the more established project (first released 2013), while Zwave-JS Server arrived in 2021. Home Assistant has the considerably larger community, at 91,123 GitHub stars versus 164.
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 Zwave-JS Server if…
- Decouples driver from clients
- Reliable
Watch out for
- Headless, no UI
- Z-Wave only
Frequently asked questions
Is Home Assistant or Zwave-JS Server 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 Zwave-JS Server free and open-source?
Yes. Home Assistant is licensed under Apache-2.0 and Zwave-JS Server under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Home Assistant and Zwave-JS Server with Docker?
Home Assistant: yes. Zwave-JS Server: yes.
Which is lighter on resources, Home Assistant or Zwave-JS Server?
Zwave-JS Server has the smaller minimum footprint at 128 MB of RAM, compared to about 1,024 MB for Home Assistant. Real-world usage depends on library size, user count, and enabled features.