In these times of crises, capitalism and the far-reaching marketization of our societies has again become a subject of contestation and critique. Alternative organizing is one response to the critique of capitalism. As an embodied and constructive form of critique it takes place in prefigurative organizations and communities on the ground that experiment with alternative forms of organizing economic exchanges and lives. These prefigurative initiatives are seen as central actors in a social transformation toward an alternative economy. However, they oftentimes remain autonomous and disconnected, questioning their potential to con- tribute to a broader social change. This paper sets out to explore how and when alternative organizing as practiced in communities and organizations can scale upwards to lead to a more profound social transformation of our societies. Building on insights from scholarship on social movement outcomes, I discuss the collective actions, contextual conditions, and social mechanisms that are likely to allow an upward scale shift of alternative organizing. Keywords: alternative organizing, critique of capitalism, diffusion, movement outcome, postcapitalism, prefiguration, scale shift, social movement studies, social transformation.