IAN Angel Fund and Rainmatter co-lead Rs 12.5 Cr Seed funding round in climate-tech startup CarbonStrong
In a seed investment round co-led by IAN Angel Fund and Rainmatter, along with participation from Social Alpha, Full Circle Ventures, and its current investors Momentum Capital and Spectrum Impact, the climate-tech business CarbonStrong has raised Rs 12.5 crore.
In 2023, Momentum Capital, Spectrum Impact, and other angel investors contributed 3.6 crore to the startup’s pre-seed investment round.
According to a news statement from CarbonStrong, the money raised will be utilized to establish the company’s first manufacturing facility, grow the workforce, develop and test goods, and move from client trials to commercial production.
CarbonStrong, which was founded in 2022 by Harsh Jain and Vikramaditya Singh, upcycles industrial waste to create low-carbon binders that can replace up to 50% of cement in concrete. The company asserts that without requiring modifications to current facilities or procedures, its approach lowers expenses and carbon emissions while preserving concrete performance.
According to the Bengaluru-based startup, its materials have been utilized in demonstration projects in Bengaluru, Hyderabad, and Chennai, and it has carried out numerous client trials and paid pilots. Additionally, it is aiming to develop an annual production capacity of up to 100,000 tons over the next two years, focusing on precast concrete and paver block manufacturers.
More than 8% of the world’s CO2 emissions come from cement, and current alternatives can’t fully replace it without sacrificing functionality. CarbonStrong transforms industrial waste from industries like steel and coal into cementitious materials that can take the place of more cement.
Other firms in the field include CarbonCraft, which uses construction and industrial waste to make geopolymer-based wall claddings and other building products, and GreenJams, which creates low-carbon building materials using crop leftovers and industrial by-products.
Additionally, the industry has received institutional support. CarbonCraft received financial support from the Technology Development Board (TDB) in February to commercialize its ultra-low-carbon wall claddings.
Nine climate-tech businesses, including CarbonStrong and Satiq Concrete Manufacturer, were chosen in June 2026 to receive grants of up to Rs 35 lakh for urban sustainability deployments.
