This article examines the role of media platforms in the jihadist propaganda ecosystem. It presents a case study of the Muntasir Media platform which achieved extensive media impact in Spain during the period 2018–19. A descriptive analysis is provided of the emergence, evolution and demise of the platform, which can be viewed as an archetypal illustration of the effect sought by Islamic State propaganda in extolling the work of media jihadists. The article argues that platforms have not only been essential for maintaining the visibility of the jihadist narrative but have also offered an attractive form of surrogate activism for radicalised individuals cut off from formal organisations.