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arp-scan vs Nmap: catalog facts
arp-scan	Nmap
Free Free to download and use, with the source published on GitHub.	Free Free for end users under the Nmap Public Source License. Redistributing Nmap inside a…
Linux, Command line	Windows, macOS, Linux, Command line
Finds devices that do not answer ping Shows MAC address vendors	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
Works only on the local network segment Command line only, usually needs root	The licence is custom, not OSI-approved, and is incompatible with GPLv2 Companies redistributing Nmap in their own products need a commercial OEM licence
Downloadable app	Downloadable app
Closed source	Not stated if open source
License not stated	License: Nmap Public Source License
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 20, 2026

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