The main objective of the present study is to characterize sustainable entrepreneurship by using a multiple-case design. Based on the analysis of five cases, the process of sustainable entrepreneurship is described. Interviewees’ responses are analyzed following a set of steps: 1) response codification, 2) categorization into common themes, and 3) conclusions that provide a general explanation by grouping common themes. The results show that there is: 1) a recognition of a social or environmental problem, 2) a recognition of a social or environmental opportunity, 3) development of a double bottom line solution, 4) development of a triple bottom line solution, 5) financing and formation of a sustainable organization, and (6) creation or entry into a sustainable market. It is concluded that these findings allow making theoretical and practical contributions to sustainable entrepreneurship.