What Is OSINT? Open-Source Intelligence Explained (2026)

OSINT, or open-source intelligence, is the practice of turning publicly available information into actionable intelligence.

It began in military and intelligence work, then expanded rapidly as the internet, social media, and public records became easier to search.

Today it is used by journalists, law enforcement, corporate security teams, and fact-checkers, with groups like Bellingcat helping prove its value.

Common tools include reverse image search, public-record databases, and breach-checking services such as Have I Been Pwned.

The article also stresses the limits: lawful research can become privacy invasion, doxxing, or other abuse if used irresponsibly.