Green Fusion is a German-based startup founded in 2021 with the slogan "The digital boiler room that does more." The company offers an energy-saving pilot for all boiler rooms, specializing in digitizing, automating, and optimizing the entire operation of clients' portfolios to facilitate a smooth transition to regenerative systems in the housing industry. The company's software enables intelligent system operation, cost savings, energy efficiency, and CO₂ reduction through continuous analysis, optimization, and automated operations management for both existing and new energy systems. Their Series A investment of €12.00M on 21 January 2025 attracted notable investors including HV Capital, XAnge, BitStone Capital, Vireo Ventures, Übermorgen Ventures, kopa ventures, and Brandenburg Kapital.