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WhoIsConnectedSniffer vs Fing: catalog facts
WhoIsConnectedSniffer	Fing
Free Freeware from NirSoft; it may not be sold or bundled with commercial products.	Freemium A free version is available. Fing Premium is a paid subscription.
Windows	Windows, macOS, Linux, Android, iOS
Passive discovery that sends no packets to other devices Shows operating system, description and IPv6 address that scanners may miss	Device identification is unusually accurate for a consumer scanner Alerts when a new device joins the network
Requires the Npcap or Network Monitor capture driver Only detects devices that send packets the computer receives, and not on other subnets	Advanced features and history require a paid subscription Closed source, and device identification relies on their cloud database
Downloadable app	Downloadable app
Closed source	Closed source
License: Freeware	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 22, 2026

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