Brazilian reforestation startup Mombak announced on Tuesday that it has delivered its first Amazon carbon removal credits more than two years ahead of schedule, marking a significant milestone for a market frequently challenged by delivery delays and quality concerns.
The initial issuance represents over 21,000 metric tonnes of carbon dioxide removed from the atmosphere. Credits were delivered to corporate buyers including Google, McKinsey, and McLaren Racing—all of which had originally anticipated receipt in 2028—alongside Bain & Company, Climeworks, Commons, and Union Square Ventures.
Mombak generates carbon credits by restoring degraded farmland and pasture across the Amazon rainforest through the planting of native tree species. To date, the startup has planted nearly 15 million trees across 12 farms in the region.
Dan Harburg, Chief Commercial Officer at Mombak, highlighted that early delivery helps build trust in a carbon market long affected by supplier underdelivery, noting that the company has also completed sales on the spot market.
The delivery represents the first fulfillment under the Symbiosis Coalition, a corporate buyer group including Google and Microsoft that has pledged to contract over 20 million tonnes of nature-based carbon offsets by 2030. Julia Strong, Executive Director of the coalition, stated that the transaction demonstrates how rigorous standards and firm buyer commitments enable carbon projects to deliver their promised environmental impact.
Mombak anticipates a larger second issuance of approximately 55,000 credits in late 2026. While demand for high-quality removal projects continues to grow—driven in part by technology firms seeking to offset the energy demands of expanding artificial intelligence infrastructure—critics maintain that carbon offsets must not replace direct corporate emissions reductions.
