Compare software

NetPeek vs What IP: catalog facts
NetPeek	What IP
Free Free and open source under the GPL 3.	Free Free and open source under the GPL 3.0.
Linux	Linux
Simple GNOME interface for network discovery Shows open ports on discovered devices	Local and public IP for every interface in one window Checks whether listening ports are publicly reachable
Linux only Far fewer options than a full scanner like Nmap	Linux only Basic scanning compared with dedicated network scanners
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0-or-later
No account needed	No account needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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