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WhoIsConnectedSniffer vs Advanced IP Scanner: catalog facts
WhoIsConnectedSniffer	Advanced IP Scanner
Free Freeware from NirSoft; it may not be sold or bundled with commercial products.	Free Free, closed source, from Famatech. Development appears stalled; version 2.5.4594.1 dates…
Windows	Windows
Passive discovery that sends no packets to other devices Shows operating system, description and IPv6 address that scanners may miss	Lists hostname, IP, MAC, manufacturer and shared folders in one sweep Runs portable, with no installation
Requires the Npcap or Network Monitor capture driver Only detects devices that send packets the computer receives, and not on other subnets	Windows only and closed source Last release was 2023
Downloadable app	Downloadable app
Closed source	Closed source
License: Freeware	License not stated
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 21, 2026

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