OSINT is just investigation using publicly-available information. Hence why open source in this context refers to open sources of information (usually online).

OSINT is just investigation using publicly-available information. Hence why open source in this context refers to open sources of information (usually online). OSINT was traditionally employed for criminal investigation, but is now growing in journalism. One example of a collective doing this kind work is https://www.bellingcat.com https://www.bellingcat.com