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ViewDNS.info vs Who.is: catalog facts
ViewDNS.info	Who.is
Freemium The web tools are free; API access and research data are sold on paid plans.	Freemium Lookups are free; domain history reports and monitoring are paid services.
Web	Web
Many DNS, WHOIS and IP tools in one place Historical data such as IP history and reverse WHOIS	WHOIS, RDAP, DNS and IP lookups in one site Reverse nameserver lookup
Some features such as dark mode need an account API and data products are paid	Full domain history requires a paid report Monitoring is a premium service
Web application, Hosted service	Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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