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MXToolbox vs ViewDNS.info: catalog facts
MXToolbox	ViewDNS.info
Freemium Lookups on the site are free to use, with paid plans offered alongside.	Freemium The web tools are free; API access and research data are sold on paid plans.
Web	Web
Many email and DNS checks in one place MX lookups query the authoritative server directly	Many DNS, WHOIS and IP tools in one place Historical data such as IP history and reverse WHOIS
Pages carry prompts for the paid service Each check runs separately rather than as one combined report	Some features such as dark mode need an account API and data products are paid
Web application	Web application, Hosted service
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.