Purpose – In recent years, logistics service providers (LSPs) have become important players in the humanitarian field, providing support for NGOs and governments when they respond to major disasters. However, the academic literature on humanitarian logistics has not really explored the roles that LSPs play in relief supply chains. The purpose of this paper is to investigate the role of LSPs in humanitarian relief. Design/methodology/approach – The research uses a two-stage exploratory approach: first, it systematically reviews the humanitarian logistics literature to see the extent to which LSPs are taken into account. Then it analyses the web sites of leading LSPs to examine how they communicate about their role in humanitarian relief. Findings – This research produces some surprising findings. While the academic literature seems to neglect the roles of LSPs in humanitarian logistics, some major third-party firms highlight their roles in relief networks. A number of research propositions are presented de...