In this paper we explore how small and medium‐sized enterprises () engage in external knowledge sourcing, a form of inbound open innovation. We draw upon a sample of 1,411 and empirically conceptualize a typology of strategic types of external knowledge sourcing, namely minimal, supply‐chain, technology‐oriented, application‐oriented, and full‐scope sourcing. Each strategy reflects the nature of external interactions and is linked to a distinct mixture of four internal practices for managing innovation. Both full‐scope and application‐oriented sourcing offer performance benefits and are associated with a stronger focus on managing innovation. However, they differ in their managerial focus on strategic and operational aspects.