The Open Smart Grid Platform sat down with several Smart Energy startups (EGeo, Sympower, and Geolumen) of the Rockstart accelerator program. During this expert session the startups learned how the platforms functions. Furthermore, we discussed how to integrate their solutions on the Open Smart Grid Platform. The startups have solutions in common that speed-up the energy supply and demand chain to a more sustainable one. Most of them require a software solution for their devices or applications to work. The Open Smart Grid Platform is looking forward to help these, and other Rockstart startups with a sustainable and profitable service or product.