Spiderfoot

Spiderfoot is a free OSINT reconnaissance tool that integrates with multiple data sources to gather and analyze IP addresses, CIDR ranges, domains and subdomains, ASNs, email addresses, phone numbers, names and usernames, BTC addresses, etc. Available on GitHub, Spiderfoot comes with both a command-line interface and an embedded web-server for providing an intuitive web-based GUI.

The application itself comes with over 200 modules making it ideal for red teaming reconnaissance activities, to discover more information about your target or identify what you or your organisation may be inadvertently exposing on the internet.