Compare software

DNS SpyWho.is
Freemium

Monitoring is paid with a 7-day free trial; some one-off tools are free.

 Freemium

Lookups are free; domain history reports and monitoring are paid services.

Web Web
  • Record-level change alerts checked from multiple locations
  • Domain and SSL expiry tracking in one place
  • WHOIS, RDAP, DNS and IP lookups in one site
  • Reverse nameserver lookup
  • Continuous monitoring requires a paid plan
  • Hosted service only
  • Full domain history requires a paid report
  • Monitoring is a premium service
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 2, 2026

Checked September 23, 2026

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