We begin with a review of the mythical, and the actual, origins of Big Tech-dominated ICT infrastructure, as well as the harms that the existing system has brought. We then discuss ways to defund Big Tech, sketching the roles that different actors can play. Finally, we show how we might refund communities, helping them to develop and adopt ICT systems that better address their needs. We promote community tech as a way of redistributing resources to empower individual and collective initiatives in alternative infrastructure-building, many of which already exist but are starved for resources. Community tech here comprises a holistic effort to empower people with the ability to build, access and govern digital technologies that serve their interests.