This article explores collaborative activities across organizational and sectoral boundaries. Inter-organizational collaborations are an increasingly common setup to address societal needs, however, current research lacks insights into such collaborations and their outcomes. This study contributes to the existing literature by assessing empirically perceptions of inter-organizational collaboration outcomes, considering different dimensions that should be measured when planning and performing tasks of social interest. The article is set in the context of disaster relief, where actors from different humanitarian relief organizations within the public and nonprofit sector engage in collaborative activities. We describe how inter-organizational collaborations create outcomes for 1) the partnership structure that is established, 2) single organizational members involved in the collaborative activity, and 3) the community targeted by the inter-organizational operation.