Data has become more and more ubiquitous in the research context. As a result, a growing number of services are created to analyze, store and share research data. This has induced the Research Data Working Group of the Digital Scientific Library (BSN10) to launch an inventory of French research data management services, funded by the Ministry of Higher Education and Research. The inventory covers all services that are managed by French institutions and infrastructures and dedicated to public research teams from all fields. Sixty services, provided by forty-five structures, have already been identified and analyzed. The paper describes the methodology used to carry out the inventory and analyzes these first results by service type, scope and research field. It also emphasizes the heterogeneous and emergent nature of the inventoried services.