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quien vs WhoisThisDomain: catalog facts
quien	WhoisThisDomain
Free Free and open source under the MIT licence.	Free Freeware from NirSoft, free to use and redistribute unmodified.
Windows, Command line	Windows
WHOIS, DNS, mail, TLS and HTTP checks in one view Readable tabbed TUI instead of raw whois text	Chooses the WHOIS server automatically by TLD Batch lookups and name-and-extension combinations
Terminal only Young project from a single developer	Only queries WHOIS servers on port 43, not web-based WHOIS Proxy authentication with a user name and password is not supported
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License: Freeware
No account needed	No account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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