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quien vs DNSlytics: catalog facts
quien	DNSlytics
Free Free and open source under the MIT licence.	Freemium Free tools on the website; premium website access, monitoring and the API are paid monthly…
Windows, Command line	Web
WHOIS, DNS, mail, TLS and HTTP checks in one view Readable tabbed TUI instead of raw whois text	Reverse IP, name server and mail server lookups in one place More than ten years of historical DNS data
Terminal only Young project from a single developer	Page views and features are limited without a premium plan IP and DNS data is refreshed every 14 days rather than live
Downloadable app	Web application, Hosted service
Open source	Closed source
License: MIT	License not stated
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 1, 2026

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