Security intelligence

Passive intelligence from public sources: certificates in Certificate Transparency logs, publicly observed hostnames and look-alike (homograph) risk.

3 toolsFree, no sign-up

Certificate Transparency Search

See certificates publicly logged for a domain and its subdomains: issuers, validity dates and the names they cover.
Passive Subdomain Finder

List hostnames publicly observed in Certificate Transparency logs and whether they still resolve — no brute force, no scanning.
IDN Homograph Risk Analyzer

Check whether an international (Unicode or Punycode) domain name can be visually confused with another name: scripts, look-alike characters and invisible characters.