In the context of multiple crises, social movements analyse these developments beyond dominant narratives and formulate alternatives. We analyse how different organizations in the social fields of care work, housing, and migrant rights in Berlin and Hamburg frame the problems and solutions they consider relevant for social change. The scope and focus of these groups vary, ranging from city-wide campaigns and coalitions to neighbourhood organizations and self-organized groups of refugees, tenants, or care workers. Within the diagnostic framings, we observe discursive strategies of de-privatization that challenge the neoliberal individualization of social problems across fields, triggering processes that we conceptualize as commoning and collective political subjectivation. In the prognostic framings, these concepts resonate with approaches towards socialization that are based on the de-privatized definition of problems as well as on a critique of the profit-orientation and deficiencies of social infrastructures. The groups collectively counter prevalent isolation and fragmentation through new ways of producing the common; the commoning of public infrastructures through the socialization of care work or housing, as well as the commoning of community infrastructures through the self-organization of migrants’ care, or housing collectives. We interpret these framings as discursive practices of relational and contentious solidarity, making interdependencies visible and enabling those affected to break out of isolation and build collective subjectivities and (infra)structures.