What impacts has the creation of the European Women’s Lobby (EWL) had on the national feminist CSOs in France and Belgium? To find this out, I examine how the national CSOs’ coordinations have adapted their practices, discourses, strategies and internal organisation to be part of the European Civil Society. Stemming from 34 interviews and two internships within both French and Belgian EWL intermediary coordinations, I put forward an actor-based sociological perspective focusing on three causal paths in order to explain the findings derived from comparing the Europeanisation of the CSOs in France and in Belgium. If identical effects of this Europeanisation were identified in both coordinations, the French coordination appears to be more proactive on UE issues and more EWL-oriented than the Belgian. These two distinctive outcomes can be explained thanks to three factors: cultural, organizational and individual. As cultural factors explain some long-term Europeanisation outcomes, factors to do with actors’ individualities also highlight the mutability of the Europeanisation process.