The article delves into the rise of corsopiracy in the late Middle Ages, particularly in the Western Mediterranean during the fourteenth and fifteenth centuries. As the region witnessed political fragmentation and conflicts among powers like PisaPisa, GenoaGenoaGenoa, VeniceVenice, and the Crown of AragonAragon, Crown of, corsopirates emerged as pivotal figures, linking political centres and peripheries while exploiting maritime insecurities for profit. This maritime predation was not limited to marginalised individuals; rather, it involved politically and economically connected actors, including merchants and shipowners. Through the case of ProvenceProvence, presented in the final section, the aim is to show that the activities of these corsomerchants were deeply entrenched in urban societies, reshaping commercial dynamics, and challenging traditional narratives of piracy as mere disruption.