Factor2 Energy is a German climate-tech company developing CO₂-based geothermal power systems. By using carbon dioxide as the working fluid, the technology accesses moderate-temperature geothermal resources. Compared to conventional systems, the technology can deliver up to twice the power output, without fracking, ultra-deep drilling, or water-intensive processes. Founded by a former Siemens Energy team after a successful proof of concept, the company is backed by leading climate investors, with its latest round led by At One Ventures. Factor2 Energy’s mission is to unlock scalable, clean, baseload geothermal power while supporting permanent carbon storage.