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Co-reactive

MaterialsDüsseldorf, GermanyFounded 2024· One of 961 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
1-10
Stage
Active
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

Scaling from lab-scale prototype to a 1,000 t/yr demonstration plant scheduled for Q2 2025.

Major Milestones

["Company founded in Berlin by Felix Ewald and Robert Meyer in 2023","Successful development of lab-scale continuous mineralization prototype","Secured €6.5 million Seed funding in November 2024","Commenced construction of 1,000 t/yr demonstration plant (expected Q2 2025)"]

Notable Customers

Industrial partners in the steel and cement sectors (feedstock and CO2 supply collaborations)

https://www.co-reactive.com

Why this company matters

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.