Society needs to make a transition towards renewable energy, requiring significant investments into the energy system. Currently, innovations are mostly started from scratch, while solutions may already be out there. With multiple parties inventing "the wheel" at the same time, we risk wasting time and money. Rethinking Energy, an open innovation platform for the energy sector, solves this problem. The platform matches firm challenges with worldwide start-ups with who have developed tools to solve these challenges. This is an initiatieve of nlmtd