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Nmap vs Whosthere: catalog facts
Nmap	Whosthere
Free Free for end users under the Nmap Public Source License. Redistributing Nmap inside a…	Free Free and open source under the Apache 2.0 licence.
Windows, macOS, Linux, Command line	Windows, Command line
Host discovery, port scanning, service and version detection and OS fingerprinting in one tool The Nmap Scripting Engine adds hundreds of Lua scripts for specific checks	Interactive terminal UI for browsing discovered devices Discovery runs without elevated privileges
The licence is custom, not OSI-approved, and is incompatible with GPLv2 Companies redistributing Nmap in their own products need a commercial OEM licence	Limited to the local network Terminal-only, with no graphical interface
Downloadable app	Downloadable app
Not stated if open source	Open source
License: Nmap Public Source License	License: Apache-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 2, 2026

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