AppDaemon 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.
| Feature | AppDaemon | Mozilla WebThings Gateway |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 76 · Good | 75 · Good |
| Category | Home Automation | Home Automation |
| License | Apache-2.0 | MPL-2.0 |
| Language | Python | TypeScript |
| Setup difficulty | Medium | Medium |
| Min. RAM | 256 MB | 512 MB |
| Deployment | docker, bare-metal | bare-metal, docker |
| GitHub stars | ★ 969 | ★ 2,646 |
| First released | 2016 | 2018 |
| Replaces | SmartThings | SmartThings, Google Home |
What are AppDaemon and Mozilla WebThings Gateway?
AppDaemon
AppDaemon is a loosely coupled, multi-threaded, sandboxed Python execution environment for writing automation apps for Home Assistant and other systems. It enables complex logic beyond YAML automations.
- Python automation apps
- Sandboxed execution
- Dashboards via HADashboard
- Works with Home Assistant
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
AppDaemon vs Mozilla WebThings Gateway: key differences
AppDaemon is written in Python, while Mozilla WebThings Gateway is built with TypeScript. Licensing differs — Apache-2.0 for AppDaemon versus MPL-2.0 for Mozilla WebThings Gateway. AppDaemon is the lighter option, starting around 256 MB of RAM against 512 MB for Mozilla WebThings Gateway. AppDaemon is the more established project (first released 2016), while Mozilla WebThings Gateway arrived in 2018. Mozilla WebThings Gateway has the considerably larger community, at 2,646 GitHub stars versus 969.
Why pick each one
Choose AppDaemon if…
- Powerful programmatic automations
- Full Python flexibility
Watch out for
- Requires Python knowledge
- Extra component to maintain
Choose Mozilla WebThings Gateway if…
- Open standards-based
- Privacy-focused
Watch out for
- Smaller community after Mozilla
- Fewer integrations than HA
Frequently asked questions
Is AppDaemon or Mozilla WebThings Gateway better?
Neither is universally better. Mozilla WebThings Gateway has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are AppDaemon and Mozilla WebThings Gateway free and open-source?
Yes. AppDaemon 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 AppDaemon and Mozilla WebThings Gateway with Docker?
AppDaemon: yes. Mozilla WebThings Gateway: yes.
Which is lighter on resources, AppDaemon or Mozilla WebThings Gateway?
AppDaemon has the smaller minimum footprint at 256 MB of RAM, compared to about 512 MB for Mozilla WebThings Gateway. Real-world usage depends on library size, user count, and enabled features.