Rockstart: "investing in early-stage startups focused on driving the energy transition"

A contact just told me about Rockstart, who have a programme built around energy. They have mentors drawn from several energy companies including Orsted. Although they are based in Amsterdam, Copenhagen and Bogota, they have an international presence.

According to their FAQ, they are interested in companies with traction:

We prefer startups with a team that already runs a business and has (early) commercial traction, but are open to discuss with single founders looking to build their teams. Ideally, the existing team already consists of the co-founders but has also hired one or more employees. You and your teammates need to have complementary skills and a positive dynamic to be able to make your business work. Team dynamics is, in fact, a critical component of the selection process.

Does anyone have any experience of working with them?