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Domotz vs WatchYourLAN: catalog facts
Domotz	WatchYourLAN
Paid Paid service with a 14-day free trial that needs no credit card.	Free Free to run yourself, with the source published on GitHub.
Web	Linux, Self-hosted
Layer-2 device identification across monitored sites Remote troubleshooting from one platform	Notifications when an unknown device joins the network Online and offline history for each host
Paid service with no free tier mentioned Cloud-managed, so monitoring data goes through the vendor	Covers the local network only Needs a machine that stays on to keep watching
Hosted service	Self-hosted
Closed source	Closed source
License not stated	License not stated
Account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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