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Open source tool that searches newly registered domain feeds to find typosquatting, IDN homograph, doppelganger and bitsquatting domains impersonating

Finds email addresses, domains, and URLs connected to a company or domain for OSINT and sales research.

is an IP address and domain name based researching websites that offers multiple services such as Reverse DNS Lookup, Whois, and AS Macros.

Enumerate available domains generated modifying the original domain name through different cybersquatting techniques

OSINT.sh tool for checking historical WHOIS records and domain ownership changes.

Verisign WHOIS lookup for checking domain registration records and registry information.

WHOIS intelligence service for searching domain ownership, history, and registrar data.

OSINT.sh tool for checking historical DNS records and domain infrastructure changes.

is a website that will help you discover hosts related to a specific domain.

Domain Tools is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

Open-source email forwarding and hosting for custom domains, with unlimited aliases, standards-based mail access, and encrypted-storage options.

OSINT tool for collecting domain, IP, ASN, and infrastructure intelligence from multiple sources.

Network diagnostic toolbox for DNS, MX, blacklist, SMTP, and domain health checks.

SimilarSites

similarsites.com

Discovery tool for finding websites similar to a domain, brand, or online service.

Open-source email alias service for receiving and replying without exposing a personal address, with apps, extensions, custom domains, and self-hosting support.

SitesLike

siteslike.com

Website discovery tool for finding similar websites by category, topic, or domain.

OSINT.sh tool for discovering subdomains connected to a target domain.

BlockAGI

github.com

BlockAGI conducts iterative, domain-specific research, and outputs detailed narrative reports to showcase its findings.

Columbus Project is an advanced subdomain discovery service with fast, powerful and easy to use API.

Cipher387's large OSINT tool collection covering social media, domains, people, maps, and more.

Database of fake and fraudulent websites used to research online scams, phishing pages, and suspicious domains.

ABookOfCreatures helps find books, reading material, archives, or public-domain educational texts.

Activist Handbook helps find books, reading material, archives, or public-domain educational texts.

AnatomyArchive helps find books, reading material, archives, or public-domain educational texts.