Political economy literature on the incentives of international actors during humanitarian crises has cast international aid coordination inefficiencies during humanitarian crises as a product of vertical principal-agent problems with informational asymmetries, divergent interests, and inter-agent competition. However, horizontal coordination between international actors represents an important and understudied dimension of the political economy of international aid during refugee responses. Horizontal coordination structures, while offering a potential solution to the principal-agent problem of humanitarian responses, can either result in coordination in practice or coordination in performance. I argue that the incentives of coordinating actors, the level of donor monitoring, and the risk of elimination of some organizations or material opportunities as a result of effective coordination all factor into international organization and international non-governmental organization coordination behaviour. I examine the relationships between stakeholders during the Syrian refugee response in Jordan and the differential take-up of coordination technologies to test my theory with policy implications.