Co-reactive GmbH

The construction sector accounts for roughly 40% of global CO₂ emissions — a figure that makes the built environment one of the most critical fronts in the fight against climate change. Most efforts have focused on improving the energy efficiency of existing buildings, but Co-reactive GmbH has taken a more fundamental approach: working on the materials themselves, developing carbon-negative solutions that do not merely reduce emissions but actively absorb them during the construction process. Co-reactive's vision is a net-zero construction industry — one achieved not through offsetting or carbon credits, but through materials that integrate carbon capture as an intrinsic property. The goal is ambitious: to transform every construction site from a source of emissions into a potential point of sequestration, reversing the environmental footprint of the sector. The business model is structured around B2B relationships, with customized solutions for companies — builders, material manufacturers, real estate developers, and public clients that must meet increasingly strict decarbonization targets, driven by both strategic choice and regulatory obligation. Growing pressure from European directives on building efficiency and embodied carbon in construction materials is creating a rapidly expanding market for companies like Co-reactive that offer concrete alternatives to conventional materials. The market for sustainable construction materials is one of the most dynamic segments in climate tech, with global investment growing steadily. Co-reactive positions itself in this space with a technically differentiated offering — not just low-emission materials, but materials that become active participants in the climate solution. An approach that demands engineering rigor and the ability to demonstrate performance compliant with construction standards, but one that opens the door to a model where building also means repairing.