Kopa VC (formerly Wi Venture) is an early-stage venture capital firm based in Mainz, Germany, with additional locations in Berlin, Munich and London. Founded in 2017 by renewable energy pioneer Matthias Willenbacher, the firm invests in European climate tech startups that address pressing environmental challenges. Committed to “Keeping Our Planet Alive,” Kopa VC has supported more than two dozen companies, achieving several exits and one IPO, while aiming to balance financial return with environmental benefit.
The firm specializes in pre-seed, seed and Series A funding for ventures in energy, mobility, nature and carbon technologies. While its remit covers all of Europe, there is particular attention on Germany, Austria and Switzerland. Investment decisions follow a structured impact method that goes beyond carbon emissions to include biodiversity protection and resource management. The team, made up of former founders, offers hands-on guidance and access to a network of industry experts, corporate partners and follow-on investors.
Investments in clean technology and battery solutions showcase Kopa VC’s support for low-carbon energy. Notable examples include Voltstorage, which develops stationary battery systems based on redox flow chemistry, and Limatica, which provides high-resolution analytics for battery cell quality. Other portfolio companies, such as Green Fusion and 1KOMMA5, advance solar integration and energy management, while Klarsolar, Ecoworks, Carbonfuture and Klim focus respectively on photovoltaic installations, CO₂-free building technologies, carbon removal marketplaces and regenerative agriculture. These investments reflect a practical approach to scaling innovations that improve grid stability and enable wider renewable energy adoption.
