Since 2005, the number of Peer-to-Peer (P2P) platforms has grown substantially in areas such as carpooling, online dating, and crowdfunding. Though the development of P2P activities is increasing, there is a lack of strategic and managerial theories for this type of platform, especially when identifying the elements of its business model. This paper seeks to clearly define what a business model is. Extensive literature is reviewed to build a theory of business model for P2P activities. The validity of the model is tested through crowdfunding platforms. Keywords: Business model, crowdfunding, customer value proposition (CVP), governance, income stream, infrastructural technologies, P2P, two-sided markets,