Search OSINT tools by investigation task.

Internet asset and attack-surface search

Best for: Use it when infrastructure research needs another structured lens on internet-exposed assets and certificates.

Cyber defense search engine and attack-surface data

Best for: Use it when a technical artifact needs passive cyber-intelligence enrichment and historical context.

Free web-based DNS and domain lookup tools

Best for: Use it when a domain investigation needs quick manual pivots across several lightweight DNS and hosting checks.

Internet asset search and exposure intelligence

Best for: Use it when a scoped host, service, product, or organization needs additional exposure context beyond Shodan or Censys.

Domain, DNS, WHOIS, and threat intelligence APIs

Best for: Use it when domain research needs structured enrichment at scale rather than one manual lookup at a time.

Browser extension for quick IOC and threat-intelligence pivots

Best for: Pivoting from domains, IPs, URLs, hashes, and CVEs into reputation and threat-intelligence sources during triage.

Open-source passive reconnaissance for domains, subdomains, hosts, and emails

Best for: Collecting first-pass public leads around an organization's domains, hosts, and exposed contact patterns.

Commercial domain intelligence for WHOIS history and DNS pivots

Best for: Investigating domains, ownership history, DNS relationships, and infrastructure context around suspicious or important web properties.

Open-source modular reconnaissance framework for technical OSINT

Best for: Technical analysts who need repeatable passive reconnaissance and enrichment around domains, organizations, contacts, or infrastructure leads.

DNS history and domain intelligence for scoped investigations

Best for: Historical DNS, subdomain, IP, nameserver, and registration-adjacent context around domains already in scope.