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ViewDNS.info vs MXToolbox: catalog facts
ViewDNS.info	MXToolbox
Freemium The web tools are free; API access and research data are sold on paid plans.	Freemium Lookups on the site are free to use, with paid plans offered alongside.
Web	Web
Many DNS, WHOIS and IP tools in one place Historical data such as IP history and reverse WHOIS	Many email and DNS checks in one place MX lookups query the authoritative server directly
Some features such as dark mode need an account API and data products are paid	Pages carry prompts for the paid service Each check runs separately rather than as one combined report
Web application, Hosted service	Web application
Closed source	Closed source
License not stated	License not stated
No account needed	No account 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.