CREW Carbon is a Yale-spinout water and climate technology company based in Hamden, Connecticut. It retrofits municipal and industrial wastewater treatment plants with a closed-system enhanced-weathering process: dosing alkaline minerals into wastewater to convert dissolved CO2 into stable bicarbonate. The approach lowers operating costs and improves treatment performance for utilities while permanently and measurably removing atmospheric carbon, which it sells to corporate buyers as durable carbon removal credits.
Heirloom Carbon Technologies is a San Francisco-based direct air capture company that uses limestone's natural CO2-absorbing properties to pull carbon dioxide permanently out of the atmosphere. Their process accelerates a geological phenomenon that normally takes thousands of years into a 3-day cycle: calcium oxide powder absorbs CO2 from ambient air, becomes limestone, gets heated in a renewable-energy-powered electric kiln to release the captured CO2, and repeats. The captured CO2 is then stored permanently underground or embedded in concrete. Founded in 2020, Heirloom opened America's first commercial DAC facility in Tracy, California in November 2023 and has raised over $354 million to expand capacity toward their goal of removing 1 billion tons of CO2 by 2035.
Nicholas Flanders is the Co-Founder and CEO of Twelve, a carbon transformation company that converts CO2, water, and renewable electricity into sustainable aviation fuel and carbon-neutral chemicals. A Stanford MBA and former McKinsey consultant, Flanders co-founded Twelve (originally Opus 12) in 2015 alongside scientists Dr. Etosha Cave and Dr. Kendra Kuhl to commercialize breakthrough electrochemical CO2 conversion technology developed at Stanford. The company has raised over $790 million, including a $645 million financing round in 2024 led by TPG Rise Climate, and is building AirPlant One - the world's first commercial-scale e-fuels facility - in Moses Lake, Washington.
Kathleen Alexander is co-founder and CEO of Savor, a San Jose-based food-tech startup that makes butter, palm oil, and cocoa butter alternatives from carbon dioxide, hydrogen, and oxygen - no animals, no plants, no farmland. Backed by Bill Gates' Breakthrough Energy Ventures and Synthesis Capital with $33 million raised, Savor commercially launched its carbon-synthesized butter in March 2025 and was recognized in TIME's Best Inventions of 2025. Alexander holds a PhD in Materials Science & Engineering from MIT and is a 2013 Hertz Fellow who grew up in Corvallis, Oregon - famously starting college at 16, dropping out, attending community college, and ultimately earning her doctorate at MIT.