BuiltWith checks websites for snippets of code or tags related to some technologies. Since that data is publicly...

A popular CT search tool is crt.sh. Subdomains can be detected using Certificate Transparency (CT). SSL/TLS certificates...

DataSploit is an open source intelligence collection (OSINT) tool. It is a simple way to dump data for a domain...

GoLismero is an open source framework for security testing. It's currently geared towards web security, but...

GrayhatWarfare is a searchable database where a list of open S3 buckets can be found. Amazon's S3 cloud storage,...

IntelOwl is an Open Source Intelligence, or OSINT solution to get threat intelligence data about a specific file,...

Nmap  is a free and open source utility for network discovery and security auditing. Many systems and...

Recon-NG is a reconnaissance tool with an interface similar to Metasploit. Running Recon-NG from the command line,...

A python based non-interactive ugly reverse IP lookup script to find domains on a target server.

Shodan is a search engine, like Google, but instead of searching for websites, it searches for internet-connected...

Sn1per works by automating a bunch of processes that collect basic recon on a target domain, (for example executing...

SpiderFoot is a reconnaissance tool that automatically queries over 100 public data sources (OSINT) to gather intelligence...