Co-reactive

MaterialsErkrath, GermanyFounded 2024· One of 970 Materials companies tracked by AMPulse

A climate-tech startup developing a continuous carbon mineralization process that converts CO2 and industrial waste into high-performance, CO2-negative construction materials.

CEO / Founder: Dr. Andreas Bremen
Team Size: 11-50
Stage: Growth Stage
Total Funding: $7M
Latest Round: Seed
Key Investors: High-Tech Gründerfonds (HTGF) (lead), NRW.Bank, AFI Ventures (Ventech's impact arm), HBG Ventures, Evercurious VC

Technology & Products

Key Products

CO-SCM (Supplementary Cementitious Material): A CO2-negative additive for concrete., Continuous Carbon Mineralization Reactor: Proprietary hardware for industrial-scale CO2 conversion., Carbon Sequestration-as-a-Service: Solutions for industrial emitters to mineralize their flue gas on-site.

Technological Advantage

The technology offers a 'drop-in' solution for existing cement plants, requiring no major infrastructure changes while locking away one-third of the product's weight in CO2 permanently.

Differentiation

Value Proposition

Permanently sequesters up to 330kg of CO2 per ton of material while providing a 'drop-in' replacement for traditional cement components, helping customers reduce carbon taxes (ETS/CBAM) and meet ESG targets.

How They Differentiate

Utilizes a proprietary continuous carbon mineralization process that converts CO2 and industrial waste (like metallurgical slags) into high-performance Supplementary Cementitious Materials (SCM) that serve as a 'drop-in' replacement for traditional cement.

Market & Competition

Target Customers

Cement and concrete manufacturers, industrial CO2 emitters (steel, power plants), and construction firms seeking sustainable building materials.

Industry Verticals

Construction & Building Materials, Cement Manufacturing, Carbon Capture, Utilization, and Storage (CCUS), Industrial Waste Management (Metallurgical Slags)

Competitors

Paebbl; Neustark; CarbonCure; MCi Carbon

Growth & Milestones

Growth Metrics

1,000 t/yr continuous demo plant opened in Erkrath (Apr 2026); preparing FOAK tens-of-thousands t/yr plants with industrial partners from 2027.

Major Milestones

Founded 2024 (NRW) by Dr. Andreas Bremen, Orlando Kleineberg, Willi Peter based on RWTH Aachen research, Lab/pilot continuous mineralization prototype developed, €6.5M Seed led by HTGF (Jan 2026) plus BMWE grants, Selected for EIC Accelerator (Mar 2026); GeoCRM consortium partner, Opened 1,000 t/yr demo plant in Erkrath (ceremony Apr 2026)

Notable Customers

Industrial partners in steel and cement (feedstock/CO2); Sievert Baustoffe publicly engaged at demo-plant opening as construction-materials industry partner

https://www.co-reactive.com

Why this company matters

AMPulse analysis, not a company disclosure

Co-reactive addresses the cement industry's carbon problem by replacing traditional cement components with a CO2-negative supplementary cementitious material (SCM). Unlike batch processes used by competitors, its continuous carbon mineralization reactor combines CO2 with feedstocks such as olivine and metallurgical slags (EAF/BOF) to produce a highly reactive material. The company claims its process permanently sequesters up to 330 kg of CO2 per ton of material, locking away roughly one-third of the product's weight as solid carbonate.

The core offering is CO-SCM, a drop-in additive for concrete that requires no major infrastructure changes at existing cement plants. Co-reactive also provides carbon sequestration-as-a-service, enabling industrial emitters to mineralize flue gas on-site using proprietary hardware. Target customers include cement and concrete manufacturers, steel mills, and power plants seeking to reduce carbon tax exposure under ETS and CBAM while meeting ESG targets.

Founded in 2024 and based in Düsseldorf, Co-reactive is an early-stage deep-tech company selected for the EIC Accelerator program. It raised €6.5 million in seed funding in November 2024 from investors including High-Tech Gründerfonds, NRW.Bank, and AFI Ventures. The company is scaling from lab prototype to a 1,000-ton-per-year demonstration plant scheduled for Q2 2025, with feedstock and CO2 supply collaborations already in place with steel and cement producers.

Co-reactive competes with Paebbl, Neustark, CarbonCure, and MCi Carbon. Its key differentiator is the continuous nature of its mineralization process, which may offer higher throughput and lower operating costs than batch alternatives. The main open question is whether the technology can achieve cost parity with conventional cement at industrial scale, a challenge that will be tested at the upcoming demonstration plant.