Objectives. This paper seeks to explain how and to what extent Open Strategy draws on Open Innovation and how different degrees of open strategy could occur as a result of the adoption of open innovation approach. Methodology. Since the relationship between open innovation and open strategy represents an empirically underexplored research area, we adopted an exploratory multiple case study design to develop new theoretical insights towards this topic. Findings. This study displays that the pathway towards open strategy could start by implementing open innovation approach. Moreover, once the open strategy is developed, it can influence open innovation process, and the level of strategy openness depends on how the firm shares informatio...