In recent years, various alternative funding methods have appeared on the financial market, available to a broad range of potential borrowers. One form of this new stream is peer-to-peer lending (P2P). Despite this business model being relatively new, a large number of platforms have appeared worldwide and the market has shown robust expansion. On the one hand, these platforms have a number of competitive advantages compared to the traditional banking sector, such as low administrative costs, efficient operations and cheap loans for borrowers, coupled with higher returns for investors. From another perspective, several risk factors have arisen due to the nature of this business model; for example, the limited consequences in case of default, the lack of institutional guarantees, and insufficient monitoring. Recent views suggest that the emerging trend of peer-to-peer platforms will be challenging for regulators, as well as for commercial banks, which might consider them as potential competitors in future. The purpose of this paper is to highlight the relevance of this growing sector through recent financial statistics, including lending volumes of the main players and the geographical expansion of the market. Furthermore, the study presents the main features of this alternative funding method, provides an overview of the growing literature on the subject, and presents the key findings.