The existing literature on open innovation mostly concentrates on large firms. Little is known about the role of open innovation in Small and Medium-sized Enterprises (SMEs). In this paper, the authors explore how SMEs engage in open innovation search. They draw upon a new survey of 1,489 SMEs. Results highlight that SMEs purposively open up to external innovation inputs. They identify variations in how SMEs search for external innovation inputs and empirically classify five strategic types of open innovation search. While these five strategies can be found in different industries, size and age classes, results suggest that a SME's open innovation search strategy is conditioned by its organizational context.