This paper explores the role of private mediation actors in preventive diplomacy. It highlights that private mediation actors possess many advantages in comparison to formal actors, especially in terms of good analysis and network capacities, confidentiality of dialogues, access to a wider set of actors, and connections to local actors through long-standing engagements. The paper also points to the emerging practice in the fields of armed violence reduction, peace mediation, and human rights protection that, if more widely applied, would represent a tremendous opportunity to strengthen preventive diplomacy. The report concludes by highlighting the underlying challenge for preventive diplomacy of finding the right balance between international demands for stabilization and local demands for political space to drive transformative change.