Compare software

ViewDNS.infoSecurityTrails
Freemium

The web tools are free; API access and research data are sold on paid plans.

 Freemium

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

Web Web
  • Many DNS, WHOIS and IP tools in one place
  • Historical data such as IP history and reverse WHOIS
  • Historical DNS and WHOIS records going back years
  • Subdomain and associated domain discovery
  • Some features such as dark mode need an account
  • API and data products are paid
  • Requires an account to use
  • Oriented towards business security teams rather than casual users
Web application, Hosted service Web application, Hosted service
Closed source Closed source
License not stated License not stated
No account needed Account needed
Needs internet Needs internet

Checked September 23, 2026

Checked October 1, 2026

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