Carbonaide secures €3.7 million to expand carbon-negative concrete
Carbonaide, a Finnish climate-tech startup developing technology to permanently store carbon dioxide in concrete, has raised €3.7 million in fresh funding to scale operations and accelerate product development. The company says the financing will help it expand internationally, deepen partnerships for sourcing CO₂, and advance its software and R&D roadmap as demand grows for lower-emissions construction materials.
The round included a mix of equity and supporting financial instruments, according to the company. It was led by existing owners Vantaan Energia, Redstone, and Ihantola Invest, with participation from private investment companies and individual investors including Zero Carbon Future Group, Helkama Kiinteistöt, and Ikorni Invest.
Turning concrete factories into carbon sinks
Tapio Vehmas, CEO of Carbonaide, said the funding strengthens the company’s ability to scale its technology and broaden its network of CO₂ partners. “With this momentum, we are well-positioned to scale our technology, expand our CO₂ partner network, and continue turning concrete factories into carbon sinks,” he said, adding that the construction sector is increasingly seeking solutions that reduce emissions and support a low-carbon built environment.
Concrete and cement production remain among the world’s most emissions-intensive industrial activities, making the sector a key target for decarbonisation. Carbonaide positions its approach as a way to reduce the footprint of concrete production while also enabling permanent CO₂ storage through mineralisation.
Spin-out roots and a platform approach
Founded in 2022, Carbonaide is a spin-out from VTT Technical Research Centre of Finland. The company has developed a CO₂ mineralisation process that permanently binds carbon dioxide into concrete, with the aim of making carbon-negative concrete commercially viable.
Carbonaide currently markets three main offerings:
- Carbonaide CO₂ curing system, which provides end-to-end CO₂ curing solutions for concrete producers, including design, installation, and integration into new or existing production lines.
- Carbonaide Service Platform, a cloud-based software layer designed to manage CO₂ flows, track carbon measurements, and support carbon credit issuance.
- Carbonaide Care, a lifecycle support and maintenance service for deployed systems.
This combination of hardware, software, and ongoing service is intended to help concrete producers adopt CO₂ curing with measurable outcomes—an increasingly important requirement as buyers, regulators, and financiers demand verifiable emissions data.
Where the new capital will go
The company said the new funding will be used primarily to accelerate growth on two fronts: commercial expansion and product development. On the go-to-market side, Carbonaide plans to increase customer acquisition by strengthening its global sales organisation and expanding marketing activities. On the product side, it intends to further develop the Carbonaide Service Platform and push R&D beyond precast concrete.
The next technical milestone highlighted by the company is “next-generation” CO₂ curing for concrete element production, which it expects could open pathways into additional concrete segments over time. Carbonaide said the work is expected to enable future applications in ready-mix and other concrete types—markets that could significantly broaden addressable demand if the technology proves scalable and cost-effective across formats.
Investor interest tied to carbon data and verification
Panu Pasanen, CEO of One Click LCA and an investor via Zero Carbon Future Group, said the company’s readiness to scale was a key factor behind the backing. He also pointed to the growing importance of reliable carbon data for low-carbon products, signalling that measurement and verification are becoming as strategic as the underlying materials innovation.
As embodied carbon reporting becomes more common in procurement and building design, platforms that can connect production data to credible claims—such as carbon storage figures or verified reductions—are likely to play a larger role in commercial adoption.
Commercial progress and early deployments in Finland
Carbonaide said its technology has been in commercial production since 2024. In 2025, the company signed agreements with Finnish concrete producer Lakan Betoni and concrete element manufacturer Lipa-Betoni to install its systems in their factories. Production using the Carbonaide systems is expected to begin at both facilities in early 2026.
The company also reported a milestone in carbon markets: in January 2026, it sold what it described as its first certified carbon credits generated through its mineralisation technology to a Finnish law firm. The transaction underscores how industrial carbon removal and storage claims are increasingly being packaged into tradable instruments—though the broader market continues to scrutinise credit quality, permanence, and verification standards.
A crowded but fast-moving climate construction landscape
Carbonaide’s announcement arrives amid heightened activity in construction decarbonisation across Europe. On the same day, Düsseldorf-based startup Co-reactive reported closing a €6.5 million seed round to scale its own CO₂ mineralisation technology for high-performance construction materials. The parallel fundraises highlight investor appetite for solutions that address cement and concrete emissions—provided they can demonstrate industrial scalability and credible measurement.
For Carbonaide, the next year is set to test that scalability: converting pilot and early commercial deployments into repeatable factory installations, building a dependable CO₂ supply partner network, and proving that carbon-negative concrete can compete on cost, performance, and verifiable impact.
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