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quien vs wtfis: catalog facts
quien	wtfis
Free Free and open source under the MIT licence.	Free Free and open source under MIT.
Windows, Command line	Command line
WHOIS, DNS, mail, TLS and HTTP checks in one view Readable tabbed TUI instead of raw whois text	Collects domain, hostname, and IP details in one lookup Combines information from several public data services
Terminal only Young project from a single developer	Lookups depend on external services and their quotas Some data sources require API credentials
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: MIT
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 8, 2026

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