Several studies suggest that open innovation (OI) practices positively influences innovation efforts of large and small firms. However, few studies have investigated implication of adapting OI in the SMEs context. In this study, we address the research gap by investigating the effects of four in-bound OI practices on innovative performance based on data from 252 technology-based SMEs. Our results reveal that different OI are beneficial for different innovation performances. For instance, technology sourcing is linked to radical innovation, while technology scouting is linked to incremental innovation. Based on our study, it seems worthwhile to further study OI issues in SMEs.