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netdiscover vs WhoIsConnectedSniffer: catalog facts
netdiscover	WhoIsConnectedSniffer
Free Free to download from its official repository.	Free Freeware from NirSoft; it may not be sold or bundled with commercial products.
Linux, Command line	Windows
Active and passive ARP discovery Works on networks without a DHCP server	Passive discovery that sends no packets to other devices Shows operating system, description and IPv6 address that scanners may miss
Only discovers hosts on the local network segment Intended for authorized testing of networks you own or may scan	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
No account needed	No 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 October 8, 2026

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