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FHEM vs WebThings Gateway: catalog facts
FHEM	WebThings Gateway
Free Free and open source under the GPL.	Free Free and open source under MPL-2.0.
Self-hosted	Linux, Web, Self-hosted
Over 430 modules for many protocols Automatic device and log creation	Private, self-hosted smart home control Drag-and-drop rules engine
Needs an always-on server and extra radio hardware Configuration is technical	Raspberry Pi image is deprecated Snap package is still experimental
Self-hosted	Downloadable app, Self-hosted
Open source	Open source
License: GPL	License: MPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.