Mantel Capture is a Boston-based MIT spinout developing molten-borate carbon capture technology that removes CO2 directly from industrial point sources such as cement and steel plants at lower cost than conventional amine-based systems. The company is moving from pilot deployments into commercial-scale carbon-capture projects with industrial customers.
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Aug 24, 2026
Latest raise
Funding activity · 1 round
Aug 24, 2026
$18.3M
Series A
Led by Constellation Technology Ventures
Mantel Capture, a Boston-based MIT spinout developing molten-borate carbon capture technology, has raised $18.3 million in a Series A funding round. The round was led by Constellation Technology Ventures, with participation from Azimut Investments. The funding was announced on August 24, 2026.
Mantel Capture specializes in carbon capture technology that removes CO2 directly from industrial point sources such as cement and steel plants. The company's molten-borate technology aims to capture carbon at a lower cost than conventional amine-based systems. Mantel Capture is currently transitioning from pilot deployments to commercial-scale carbon-capture projects with industrial customers.
The Series A round brings total capital to support the company's expansion into commercial-scale projects. The lead investor, Constellation Technology Ventures, is known for backing innovative energy technologies. Azimut Investments also participated in the round.
This funding will enable Mantel Capture to accelerate the deployment of its carbon capture technology, addressing the urgent need for cost-effective solutions in hard-to-abate industries. With the backing of strategic investors, the company is well-positioned to scale its operations and make a significant impact on reducing industrial CO2 emissions.
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