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SecurityTrails vs DNSDumpster: catalog facts
SecurityTrails	DNSDumpster
Freemium An API key is available on sign-up; larger data services are aimed at security teams.	Free Free to use in the browser.
Web	Web
Historical DNS and WHOIS records going back years Subdomain and associated domain discovery	Nothing to install Quick overview of a domain's visible hosts
Requires an account to use Oriented towards business security teams rather than casual users	Intended for authorized testing and checking your own domains Results depend on publicly available DNS data
Web application, Hosted service	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 24, 2026

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