Co-Reactive Raises €6.5M Seed Round Led by HTGF

Why It Matters

It offers a scalable, carbon‑negative alternative for cement production, directly addressing one of the hardest‑to‑decarbonise industrial sectors and unlocking new climate‑tech market opportunities.

Key Takeaways

• €6.5M seed round led by HTGF.
• Continuous CO₂ mineralisation converts captured CO₂ to cement additives.
• Drop‑in SCMs cut clinker use, lower cement emissions.
• Demonstration plant 1,000 t/yr targeted Q2 2026.
• Plans for 10‑k‑ton scale plants by 2027.

Pulse Analysis

The cement industry remains a stubborn source of greenhouse gases, accounting for about eight percent of global CO₂ emissions. Traditional clinker reduction strategies rely on supplementary cementitious materials that often compete with dwindling natural resources. Co‑reactive’s continuous mineralisation process sidesteps these constraints by using abundant minerals such as olivine and steel‑making slags, turning captured CO₂ into a market‑ready, carbon‑negative additive that can be blended directly into existing mixes without re‑tooling plants.

The recent €6.5 million seed round, anchored by HTGF and supported by public funds like the Federal Funding for Industry and Climate, provides the financial runway to move from laboratory proof‑of‑concept to a 1,000‑ton‑per‑year pilot plant slated for Q2 2026. This milestone will demonstrate continuous operation at scale, validate performance metrics such as compressive strength and durability, and de‑risk the technology for downstream partners. Simultaneously, Co‑reactive is negotiating with cement and steel producers to co‑locate larger facilities capable of processing tens of thousands of tons of CO₂ annually, leveraging on‑site emissions streams.

If successful, Co‑reactive could reshape the economics of low‑carbon concrete, offering a drop‑in product that reduces clinker demand and earns carbon credits. The approach aligns with emerging EU Green Deal incentives and could accelerate adoption of carbon‑negative building materials worldwide. However, scaling will hinge on securing steady supplies of suitable mineral feedstock and navigating certification pathways, challenges that the company’s collaborative value‑chain strategy aims to mitigate.

Deal Summary

German climatetech startup Co-reactive completed a €6.5 million seed financing round led by HTGF, with participation from NRW.Bank, HBG Ventures, AFI Ventures, Evercurious VC and climate‑tech angels, plus public funding from the Federal Funding for Industry and Climate (BIK). The capital will be used to scale its CO₂‑negative mineralisation technology for cement and construction materials.