SHSelfHostIndex

Home Assistant Operating System 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.

Not the right match-up?
HO Home Assistant Operating System Embedded operating system optimized for Home Assistant VS ZW Zwave-JS Server Small server wrapping the Z-Wave JS driver over WebSocket
FeatureHome Assistant Operating SystemZwave-JS Server
Deploy effort≈5-minute setupUnder-an-hour setup
Health score91 · Excellent74 · Good
CategoryHome AutomationHome Automation
LicenseApache-2.0Apache-2.0
LanguagePythonTypeScript
Setup difficultyEasyMedium
Min. RAM1,024 MB128 MB
Deploymentone-click, bare-metaldocker, binary
GitHub stars★ 7,492★ 164
First released20192021
ReplacesSmartThings, HubitatSmartThings

What are Home Assistant Operating System and Zwave-JS Server?

Home Assistant Operating System

Home Assistant Operating System is a minimal embedded OS designed to run the Home Assistant smart home platform with add-on support. It manages updates and add-ons through the Supervisor.

  • Purpose-built OS for HA
  • Add-on store via Supervisor
  • Automatic updates
  • Runs on Pi and x86

Read the full Home Assistant Operating System guide →

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 Operating System vs Zwave-JS Server: key differences

Home Assistant Operating System 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 Operating System. Home Assistant Operating System is the more established project (first released 2019), while Zwave-JS Server arrived in 2021. Home Assistant Operating System has the considerably larger community, at 7,492 GitHub stars versus 164. Zwave-JS Server lists first-class Docker deployment; Home Assistant Operating System does not.

Why pick each one

Choose Home Assistant Operating System if…

  • Easiest full-featured HA install
  • Managed add-ons

Watch out for

  • Takes over the whole device
  • Less general-purpose
Home Assistant Operating System details

Choose Zwave-JS Server if…

  • Decouples driver from clients
  • Reliable

Watch out for

  • Headless, no UI
  • Z-Wave only
Zwave-JS Server details

Frequently asked questions

Is Home Assistant Operating System or Zwave-JS Server better?

Home Assistant Operating System is the stronger all-round pick: it has both the larger community and the simpler easy setup. Consider Zwave-JS Server if its specific feature set fits your needs better.

Are Home Assistant Operating System and Zwave-JS Server free and open-source?

Yes. Home Assistant Operating System 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 Operating System and Zwave-JS Server with Docker?

Home Assistant Operating System: check the project docs for container support. Zwave-JS Server: yes.

Which is lighter on resources, Home Assistant Operating System 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 Operating System. Real-world usage depends on library size, user count, and enabled features.

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