This article examines growing NGO-business hybridization of nonstate service providers in a dynamic, new sector: small-scale renewable energy in East Africa. Drawing from the literature on the commercialization of NGOs and social enterprises, we first conceptualize a spectrum of commercialization, highlighting how three types of hybrid organizations vary in their definition, motivation, level of integration, and financial model. We then investigate the causes for the recent growth of hybridity among NGOs and businesses. We argue that changes in donor funding patterns, neoliberal ideology, and government policies on renewable energy have stimulated these entrepreneurial forms of hybridity. Finally, we examine the consequences for equitable access and accountability of these hybrid types of nonstate service provider.