Finnish Startup Carbonaide raises $4.4M to turn concrete into a carbon sink

Carbonaide, a startup based in Finland, has raised $4.4 million (€3.7 million) to grow its carbon-negative concrete business. The funding was led by existing investors, e.g. Vantaan Energia, Redstone, and Ihantola Invest, with several others also joining in, such as Zero Carbon Future Group and Helkama Kiinteistöt.

The money will help the company tackle one of the construction industry’s biggest climate problems: cement production, which is responsible for about 8% of global CO₂ emissions. Carbonaide’s solution works by using captured carbon dioxide during the concrete curing process, where it becomes permanently locked into the material.

That means the company isn’t just cutting emissions — it’s also able to generate carbon credits by storing CO₂ inside concrete. The idea is already getting real-world traction, and Carbonaide has even completed its first sale of certified carbon storage credits to a Finnish law firm.

Furthermore, with the aid of new funding, the team plans to scale up. That includes expanding sales and marketing internationally, improving its cloud-based software for tracking carbon flows and measurements, and continuing work on carbon credit systems. The company is also investing in research to see how the technology can be used in other types of concrete, including ready-mix.

CEO Tapio Vehmas says the momentum puts Carbonaide in a strong position to grow, build more CO₂ partnerships, and turn concrete factories into long-term carbon storage sites. From the investor side, Panu Pasanen of Zero Carbon Future Group said he’s excited to back the company now that the technology is ready to scale, calling it a promising step toward cleaner, low-carbon construction.