Microsoft Partners with Alt Carbon: A Milestone for India's Carbon Removal Efforts

TL;DR

• Microsoft has signed a three-year carbon removal agreement with Indian startup Alt Carbon for 36,920 metric tons of credits from the Darjeeling Revival Project.
• The deal is Microsoft’s first enhanced-rock weathering purchase in Asia, and it followed more than a year of scientific review and due diligence.
• The partnership signals India’s growing importance in carbon removal and could help validate durable climate-tech projects in the region.

Microsoft Partners with Alt Carbon: A Milestone for India's Carbon Removal Efforts

Microsoft has signed a major carbon removal agreement with Alt Carbon, an Indian startup working on enhanced rock weathering, in a move that underscores India’s rising profile in climate tech. The deal covers 36,920 metric tons of carbon dioxide removal credits to be delivered by 2029 from Alt Carbon’s Darjeeling Revival Project in eastern India.

This is Microsoft’s first enhanced-rock weathering deal in Asia, making it notable not just for the size of the purchase but also for the technology and geography involved. The agreement also includes an option for Microsoft to buy additional volumes if Alt Carbon meets delivery and verification milestones.

Why This Deal Matters for Carbon Removal

Enhanced rock weathering is a carbon removal method that accelerates a natural process: certain rocks absorb carbon dioxide as they break down, locking it away in a more durable form. By backing a project using this approach in India, Microsoft is helping broaden the global carbon removal market beyond the United States and Europe.

The deal is especially important because durable carbon removal remains a relatively young and expensive market, where buyers demand strong proof that credits represent real, measurable, and lasting climate benefits. Microsoft’s purchase sends a signal that projects in India can meet those expectations.

The Scientific Review Behind the Agreement

Alt Carbon says Microsoft subjected the startup to more than a year of scientific review and due diligence before finalizing the agreement. According to reporting on the deal, Microsoft required additional verification protocols and data-sharing measures beyond typical industry practice.

That level of scrutiny matters because carbon removal credits depend on trust in the underlying science, monitoring, and measurement methods. For a relatively new company working in a complex area like enhanced rock weathering, passing that review can function as a credibility milestone as much as a commercial one.

India’s Growing Role in Carbon Removal

The partnership highlights India’s emergence as a serious player in carbon removal technologies. Until recently, the sector’s biggest momentum had come from a handful of large corporate buyers and projects concentrated in a few markets, but deals like this suggest that India is moving onto the global map.

Alt Carbon’s project in Darjeeling adds a geographically diverse and scientifically distinct option to the market. For Indian climate-tech companies, the Microsoft agreement may also open the door to more international buyers looking for durable removal solutions in South Asia.

What It Means for Microsoft’s Climate Strategy

Microsoft has been one of the most active corporate buyers in the carbon removal market, and this latest purchase fits into its broader push to secure high-quality removals as it expands its AI and cloud footprint. The company has also been associated with large-scale carbon removal commitments in other regions and project types, including forestry-based deals in India and durable removal purchases elsewhere.

At the same time, the broader market has faced uncertainty. Some reports say Microsoft has paused new carbon removal credit purchases, though the company has denied that it is indefinitely stopping all buying. Against that backdrop, the Alt Carbon deal stands out as a continuing commitment to project-level carbon removal even amid a more cautious market environment.

The Road Ahead for Alt Carbon

For Alt Carbon, the Microsoft agreement is more than a commercial win; it is a validation of its technical approach and project execution. The option for additional purchases gives the startup a pathway to expand if it can continue meeting performance and verification targets.

For India, the deal could help accelerate investment, standards, and expertise in carbon removal, particularly in technologies that can scale without competing directly with land-intensive offset models. If Alt Carbon delivers as promised, the partnership could become a reference point for future climate-tech deals across Asia.

AndroGuider Team

Articles written by the AndroGuider team. We try to make them thorough and informational while being easy to read.