Pushing for social change at work is frustrating and precarious. Many employee activists therefore seek support in communities that form around their aspirations and reside ‘between’ organizations. This article advances our understanding of how community participation shapes employee activists’ experiences of their change agency as they return to and pursue their social purpose in their corporate lives. Grounded in an in-depth qualitative study of an inter-organizational community of employee activists, we introduce the notion of ‘dispersed collectivity’: employee activists generate a shared sense of collectivity that they maintain even as they disperse into their workplaces. Dispersed collectivity enables subtle agentic experiences by emboldening employee activists to endure their often-challenging corporate lives, unsettle corporate norms, and detach from their corporate positions. Even without mobilizing a collective push for change across firms, communities can thus play a critical role in sustaining employee activism. Our study contributes a more nuanced account of employee activists’ change agency and offers new theoretical insights into the role of inter-organizational communities in social change, the practices they can use to build collective momentum and empathic connections, and their impact on employee activists’ determination to drive social change from within.