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SecurityTrailsWhoxy
Freemium

An API key is available on sign-up; larger data services are aimed at security teams.

 Freemium

Free account with no monthly fee; API queries are pay as you go, from $10 for 5,000 WHOIS…

Web Web
  • Historical DNS and WHOIS records going back years
  • Subdomain and associated domain discovery
  • Reverse WHOIS by owner, company, email or keyword
  • WHOIS history lookups
  • Requires an account to use
  • Oriented towards business security teams rather than casual users
  • Mainly built around a paid API for developers
  • Bulk data such as the full database is expensive
Web application, Hosted service Web application, Hosted service
Closed source Closed source
License not stated License not stated
Account needed Not stated if an account is needed
Needs internet Needs internet

Checked October 1, 2026

Checked September 23, 2026

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