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

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