District 4 Labs: Darkside OSINT Repository

District 4 Labs is a cutting-edge data business dedicated to building the open-source intelligence (OSINT) tools and technologies of tomorrow. Its flagship product, DARKSIDE, is one of the world’s largest repositories of breached data, compromised records, and other person of interest information. DARKSIDE was built by investigators for investigators and is critical for any online investigation or intelligence gathering exercise, especially those involving attribution or the identification of online accounts.

Darkside is used by federal law enforcement and intelligence agencies, investigators, penetration testers, managed security service providers (MSSPs), and security teams to investigate persons of interest, mitigate risk, and uncover critical intelligence.