Alt Carbon

The page introduces the team behind Alt Carbon’s climate action stories, including experts, scientists, and thought leaders in carbon removal and climate technology.

The page features articles, insights, and stories about carbon removal technology, climate action, and sustainable initiatives from Alt Carbon’s perspective in the global south.

A century after Tagore carried the message of Asian modernisation to Tokyo, the two countries are reshaping climate action.

The page features “Alter 03 — Kanchipuram Saris & Thinking Machines.”

Alt Carbon is a deeptech science and data company building carbon removal infrastructure through Enhanced Rock Weathering in South Asia.

Building Planetary Intelligence

Microsoft signs a three-year agreement to buy 36,920 metric tons of carbon-removal credits from Indian startup Alt Carbon, its first enhanced rock weathering deal in Asia. The credits come from Alt Carbon’s Darjeeling Revival Project and are due by 2029, with Microsoft able to purchase additional volumes if delivery and verification milestones are met. Alt Carbon spreads crushed basalt on farmland and issues credits through the Isometric registry.

Jun 2026TechCrunchNews article

Alt Carbon delivers its first verified enhanced rock weathering carbon removal credits to Mitsui O.S.K. Lines (MOL). The delivery is part of a multi-year offtake agreement.

Nov 2025ESG TimesNews article

Alt Carbon secures $12 million in seed funding to expand enhanced rock weathering across the Global South. The funding also advances its Darjeeling Revival Project.

May 2025New PolisNews article

India-based climate-tech startup Alt Carbon raises $12 million in a seed round led by Lachy Groom to expand its enhanced rock weathering carbon-removal work in South Asia. The funding is intended to scale the company’s efforts to trap carbon in rocks and soil.

May 2025ESG TodayNews article