First published: 06 May 2022International audienceDrawing on qualitative investigations of three French cities, this this paper contributes to an understanding of the reasons behind the proliferation of activist city networks. Following the literature on the functions of transnational city networks, this article reveals four significant drivers that explain the preference of French cities for national city network ANVITA over international city networks amid a surge of welcoming initiatives. The four drivers offer opportunities to (1) share experience, (2) shame national authorities and propose alternative narratives, (3) limit pressure and opposition from NGOs and activists and (4) lend legitimacy to current policies and attain a label of ...