Platforms are increasingly used by healthcare organisations for information exchange, service integration and service innovation. However, it is crucial for healthcare organisations to select a platform that offers the functionalities that meet their needs. The goal of this research was to determine the relevant criteria and their importance for the selection of a platform supplier in the Netherlands. The research that was needed to do so can be divided into two parts. In the first part, a literature review was executed and individual and focus group interviews with experts were conducted to determine a complete set of criteria and sub-criteria. In the second part, a questionnaire was distributed to collect judgements on the importance of the criteria from different stakeholders in healthcare. The results of this study confirm the relevance of certain criteria from existing literature. Besides, it contributes to the literature by pointing out irrelevant criteria and by adding relevant criteria for platform selection in the specific context of the Dutch healthcare sector. Practically, the criteria and their importance make it possible for healthcare organisations to gain more control over the process of selecting a healthcare platform.