Intelligence is a powerful resource that is not only the exclusive prerogative of police, armed forces and government agencies, but it is also a valuable asset for analysts working in the private sector. The aim of this chapter is to provide an overview of open-source intelligence (OSINT) and its challenges and opportunities as part of a private sector analyst’s operational experience applied to the analysis of companies and people. The sources, tools and techniques described can indeed be applied in many areas and contexts, including the analysis of actors and entities involved in the trafficking of cultural heritage. Furthermore, it presents an OSINT methodology suitable for practitioners and researchers who do not have access to law enforcement sources or classified information.