Haffner Energy SA is a French renewable energy company specializing in the design and construction of biomass-based energy solutions. Haffner Energy develops HYNOCA, a patented platform for producing renewable hydrogen with a carbon-negative profile, and works on related technologies for renewable gas, methanol, and Sustainable Aviation Fuel. The company serves industrial customers and local authorities seeking decarbonized energy systems, combining engineering, project management, and turnkey plant delivery. Its activities sit at the intersection of clean-fuel production, biomass valorization, and energy infrastructure, giving it a role in supporting low-carbon industrial and utility applications. Based in Vitry-le-François, France, Haffner Energy focuses on commercial deployment of its energy conversion technologies across the renewable fuels market.