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MyLanViewer Network/IP Scanner vs WhoIsConnectedSniffer: catalog facts
MyLanViewer Network/IP Scanner	WhoIsConnectedSniffer
Paid Commercial software with a registration page; check the site for current terms.	Free Freeware from NirSoft; it may not be sold or bundled with commercial products.
Windows	Windows
Detailed per-device information including MAC and NIC vendor Alerts when new devices join the network	Passive discovery that sends no packets to other devices Shows operating system, description and IPv6 address that scanners may miss
Windows only Requires registration for full use	Requires the Npcap or Network Monitor capture driver Only detects devices that send packets the computer receives, and not on other subnets
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License: Freeware
Not stated if an account is needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked October 8, 2026

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