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Home Assistant Operating System vs Mozilla WebThings Gateway

A side-by-side comparison of two self-hosted home automation options — licensing, setup difficulty, resource needs, and what each one replaces.

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HO Home Assistant Operating System Embedded operating system optimized for Home Assistant VS MO Mozilla WebThings Gateway Open gateway for the decentralized web of things
FeatureHome Assistant Operating SystemMozilla WebThings Gateway
Deploy effort≈5-minute setupUnder-an-hour setup
Health score91 · Excellent81 · Excellent
CategoryHome AutomationHome Automation
LicenseApache-2.0MPL-2.0
LanguagePythonTypeScript
Setup difficultyEasyMedium
Min. RAM1,024 MB512 MB
Deploymentone-click, bare-metalbare-metal, docker
GitHub stars★ 7,492★ 2,646
First released20192018
ReplacesSmartThings, HubitatSmartThings, Google Home

What are Home Assistant Operating System and Mozilla WebThings Gateway?

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 →

Mozilla WebThings Gateway

WebThings Gateway is an open-source gateway for monitoring and controlling smart home devices over the web using open standards. Originating at Mozilla, it now continues as a community project.

  • Web of Things standards
  • Add-on device support
  • Rules engine
  • Local web interface

Read the full Mozilla WebThings Gateway guide →

Home Assistant Operating System vs Mozilla WebThings Gateway: key differences

Home Assistant Operating System is written in Python, while Mozilla WebThings Gateway is built with TypeScript. Licensing differs — Apache-2.0 for Home Assistant Operating System versus MPL-2.0 for Mozilla WebThings Gateway. Mozilla WebThings Gateway is the lighter option, starting around 512 MB of RAM against 1,024 MB for Home Assistant Operating System. Home Assistant Operating System has the considerably larger community, at 7,492 GitHub stars versus 2,646. Mozilla WebThings Gateway 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 Mozilla WebThings Gateway if…

  • Open standards-based
  • Privacy-focused

Watch out for

  • Smaller community after Mozilla
  • Fewer integrations than HA
Mozilla WebThings Gateway details

Frequently asked questions

Is Home Assistant Operating System or Mozilla WebThings Gateway better?

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

Are Home Assistant Operating System and Mozilla WebThings Gateway free and open-source?

Yes. Home Assistant Operating System is licensed under Apache-2.0 and Mozilla WebThings Gateway under MPL-2.0. Both can be self-hosted at no software cost.

Can I run Home Assistant Operating System and Mozilla WebThings Gateway with Docker?

Home Assistant Operating System: check the project docs for container support. Mozilla WebThings Gateway: yes.

Which is lighter on resources, Home Assistant Operating System or Mozilla WebThings Gateway?

Mozilla WebThings Gateway has the smaller minimum footprint at 512 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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