ECRIN, the European Clinical Research Infrastructure Network, has launched the Covid-19 Marketplace. This new, online tool aims to facilitate and promote collaboration by providing access to planned and ongoing clinical trials, and to share trial ideas and questions in order to enable clinical researchers interested in the same topic to reach out and join forces. The Covid-19 Marketplace is freely available for all scientific researchers working in clinical research, and in particular on Covid-19. The research questions submitted are approved for inclusion in the database by the ECRIN team, based on their capacity to answer the medical communities need to advance Covid-19 research, and then made searchable on the Marketplace platform.