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§ Private Profile · Silicon Valley, CA, USA
Produces biochar from agricultural waste for carbon sequestration and soil improvement in regenerative agriculture.
Founded by Harper Moss and Gregory Ray, Los Altos-based CarbonZero produces biochar from agricultural waste like almond shells through pyrolysis to sequester carbon and improve soil quality. The company converts this waste into a stable soil amendment for regenerative agriculture, aiming to mitigate one and a half million tons of carbon dioxide emissions at its initial production facility in Williams, California. Operating within the carbon markets, the firm generates revenue by selling biochar to local farmers and supplying carbon removal certificates through platforms like the Puro network. The startup recently emerged from stealth with $3,500,000 in seed funding and $7,000,000 in biochar pre-sales, backed by Android co-founder Rich Miner alongside executives from Google and Meta. Additionally, the enterprise has established a carbon dioxide removal partnership with Climeworks to further advance its climate mitigation objectives.
CarbonZero.Eco has raised $4.0M across 1 funding round.
CarbonZero.Eco has raised $4.0M in total across 1 funding round.
CarbonZero.Eco has raised $4.0M in total across 1 funding round.
CarbonZero.Eco's investors include Builders, C2 Investment, Streamlined Ventures, Amjad Masad, Arash Ferdowsi, Mei Z., Nkechi Iregbulem.
CarbonZero.Eco has raised $4.0M across 1 funding round. Most recently, it raised $4.0M Seed in February 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Feb 1, 2025 | $4M Seed | — | Builders, C2 Investment, Streamlined Ventures, Amjad Masad, Arash Ferdowsi, MEI Z., Nkechi Iregbulem | Announced |
CarbonZero.Eco is a Silicon Valley-based, VC-backed startup that converts agricultural waste, primarily almond shells, into biochar through pyrolysis, enabling long-term carbon sequestration and regenerative farming.[1][2][3] It serves California almond farmers by providing biochar that improves soil health, boosts crop yields by 20-100%, removes heavy metals from stormwater, and generates carbon credits, while addressing a looming biochar shortage with kilns producing 30,000 tons annually—five times current technology levels.[1][2][3] The company solves the dual problems of agricultural waste decomposition (which releases CO2) and soil degradation by stabilizing carbon for up to 1,000 years and mitigating 1.5 million tons of CO2 from its first Williams, CA facility, with over $7 million in farmer contracts and $3.5 million seed funding from Google, Amazon, and Meta executives signaling strong growth momentum.[1][2][3]
CarbonZero.Eco was co-founded by 16-year-old Harper Moss, who conceived the idea at age 15 inspired by Amazon reforestation but pivoted to biochar after consulting carbon capture experts, recognizing its immediate impact potential.[1][2] Moss's passion for the environment stemmed from a high school design class teaching systematic problem-solving and a social entrepreneurship program on startups; she emerged from stealth in early 2025 as CEO.[2] Early traction included raising $3.5 million in seed funding and securing over $7 million in contracts with California almond farmers, with the first plant in Williams (Colusa County), CA, strategically sited near almond shell aggregators to cut emissions and set for operations in April-May 2025.[2][3]
CarbonZero.Eco rides the regenerative agriculture and carbon removal wave, capitalizing on rising demand for scalable sequestration amid global net-zero pushes and biochar shortages.[1][3] Timing aligns with California's almond industry waste surplus, SB1383 regulations, and carbon credit markets, bridging ag and climate tech by turning farms into CO2 sinks—mitigating 1.5M tons from one site alone.[1][2][3] It influences the ecosystem by mainstreaming biochar adoption, proving economic viability for farmers, and modeling expansion to other waste-heavy sectors, while tech backing accelerates climeworks-like deals and U.S. scaling.[3][4]
CarbonZero.Eco's first plant launch in 2025, Puro.earth credits, and Climeworks partnership position it for rapid scaling, potentially expanding to nationwide ag waste and beyond-almond feedstocks amid surging carbon removal needs.[3][4] Trends like regulatory carbon pricing, farmer incentives, and AI-optimized ag will propel growth, though logistics and adoption hurdles remain; success could evolve its influence from niche startup to biochar market leader, redefining sustainable farming's role in climate mitigation and echoing Harper Moss's youthful vision in Silicon Valley impact.[1][2][3]