Tagged: climate-tech
30 results
Calcarea
Calcarea is a Caltech- and USC-born climate-tech company decarbonizing the shipping industry with onboard reactors that capture CO2 from ship exhaust and convert it into stable ocean bicarbonate. By speeding up the natural reaction between seawater and limestone - a process that normally takes over 10,000 years - down to about a minute, Calcarea aims to permanently and safely store roughly half of a cargo ship's emissions as slightly saltier seawater, at costs competitive with today's best carbon capture options.
Duranium
Duranium is a Y Combinator (S25) advanced-materials company reshoring U.S. production of critical metals - titanium, magnesium, aluminum, zirconium and hafnium. It modernizes carbochlorination metallurgy with a novel reactor that recirculates CO and chlorine streams back into feedstock and spins off a saleable co-product (bleaching agents/hypochlorite), aiming to match Chinese-level pricing without subsidies while eliminating direct emissions. Founded in 2025 by CEO Brenden Prins-McKinney and CTO Berkley Noble, the company targets a pilot facility by June 2026 and roughly 12% of the U.S. magnesium market by 2029.
Electroflow Technologies
Electroflow Technologies is a San Bruno, California startup building an electrochemical direct lithium extraction (DLE) process that turns low-grade, dilute North American brines into battery-grade lithium and lithium iron phosphate (LFP) powder. By collapsing a conventional 10-step brine-to-LFP process down to three steps and using lithium-selective electrodes, the company aims to produce LFP cathode material domestically at under $2,500 per metric ton - roughly 40% below current Chinese producers - while using minimal water, chemicals, and electricity.
Fleet
Fleet is a San Francisco-based commuter benefits management platform that helps employers set up, run, and stay compliant with pre-tax and subsidized transportation programs. It manages all mobility spend in one place - pre-tax transit and parking, employer subsidies, government grants, and rewards - across transit, parking, bikes, e-bikes, scooters, rideshare, and vanpools. By integrating with 180+ HR and payroll systems, Fleet lets HR teams roll out commuter benefits quickly, meet local mandates in cities like NYC, LA, and the Bay Area, and nudge employees toward lower-carbon commutes.
Furno Materials
Furno Materials is a California cleantech company rebuilding how cement is made. Instead of the mile-long rotary kilns that make cement one of the dirtiest industries on earth - roughly 8% of global CO2 - Furno builds compact, modular vertical micro-kilns (the 'Furno Brick') that run at more than 80% thermal efficiency, roughly double a conventional plant. The kilns burn gas-based fuels, eliminate NOx and SOx emissions entirely, cut fossil-fuel emissions by at least 70%, and can reach zero emissions on hydrogen - all while producing standards-grade Ordinary Portland Cement at the point of demand.
Re:Dish Co.
Re:Dish is a New York-based reuse company that replaces single-use foodservice containers and cups with a full-service reusable dishware program. Through its 'Reuse as a Service' model, Re:Dish delivers reusables, collects them daily, sanitizes them at a high-capacity Brooklyn warewashing facility washing up to 75,000 units a day, and tracks the environmental impact through its DishTrack software. Founded by serial entrepreneur Caroline Vanderlip in 2020, it serves corporate cafeterias, schools, hospitals, arenas and production sets, tackling the roughly one trillion single-use foodservice items thrown away in the US each year.
TerraBlaster
TerraBlaster is a California agtech startup building a rugged, tractor-mounted soil sensor that reads nitrogen, phosphorus, potassium, pH and other nutrients in real time using Laser-Induced Breakdown Spectroscopy (LIBS) - the same laser technique NASA uses on Mars rovers, licensed from St. Louis deep-tech firm Impossible Sensing. Led by CEO Jorge Heraud, who previously co-founded Blue River Technology (acquired by John Deere for $305M), the company aims to replace slow, sparse lab soil sampling with instant, plant-level nutrient maps so farmers can apply exactly the right amount of fertilizer - cutting waste, boosting yields, and protecting waterways.
Verustruct
Verustruct is a New Haven-based construction-technology company building a gantry-less 3D printing system to make affordable, sustainable housing at scale. Founded by former SpaceX engineer Nick Callegari, its patent-pending translational slipform printer extrudes load-bearing walls with embedded mechanical, electrical, and plumbing systems, then scales itself up layer by layer, sidestepping the bulky gantry frames that cap the size of most additive-construction projects. Organized as a public benefit corporation, Verustruct aims to cut home construction cost by roughly half and emissions by around 40 percent.
Jorge Heraud
Jorge Heraud is a Peruvian-born engineer and serial agtech founder who co-founded Blue River Technology — sold to John Deere for $305 million in 2017 — and is now CEO of TerraBlaster, a Redwood City startup using NASA-pioneered laser spectroscopy to give farmers real-time soil nutrient data, aiming to cut fertilizer waste and transform how agriculture feeds the world.
Kevin Gibbs
Kevin Gibbs is co-founder and CEO of Terraton, a San Francisco climate-tech startup building a 'business-in-a-box' franchise model for biochar carbon removal. Before climate, he built two pieces of internet plumbing most people use without knowing his name: Google Suggest (search autocomplete) and Google App Engine. He went on to co-found Quip with Bret Taylor, sold it to Salesforce in 2016 for roughly $750M, and ran it to north of $100M ARR. Terraton raised an $11.5M seed in August 2025 led by Lowercarbon and Gigascale.
Justin Dawe
Justin Dawe is the founder and CEO of Earth Force Technologies, a San Francisco climate-tech company building in-cabin sensor tablets and a web portal that give forestry operators real-time, tree-level guidance for wildfire prevention and forest restoration. A Stanford-trained engineer and Harvard MBA, he has spent more than two decades in climate and mobility ventures, including roles as CEO of Scoot Networks, VP of New Ventures at Bird, and founding CEO of C12 Energy. Earth Force has raised about $8.6M in seed funding from BOLD Capital Partners, Alley Robotics Ventures, and others.
Applied Carbon
Applied Carbon (formerly Climate Robotics) builds tractor-pulled machines that turn crop residue into biochar in a single pass across the field. The Houston-based startup converts post-harvest plant waste into a stable form of carbon that improves soil health and locks CO2 underground for centuries, selling carbon removal credits to buyers including Microsoft.
Axiom Cloud
Axiom Cloud builds AI software that makes commercial refrigeration systems cheaper to run, easier to maintain, and dramatically less polluting. Its cloud platform plugs into existing refrigeration controllers at grocery stores and cold-storage facilities to spot refrigerant leaks early, shift energy use off-peak, and automate work orders - cutting both costs and the climate impact of supermarket cooling.
GridCARE
GridCARE is a Redwood City, California company that uses generative AI to find hidden capacity inside the existing electric grid - turning data-center 'time-to-power' from a 5-to-7-year wait into 6-to-12 months. Founded in 2024 by Amit Narayan with co-founders from Stanford, the company is building what it calls 'power acceleration for AI,' partnering with utilities like National Grid and Portland General Electric and counting Sutter Hill Ventures, Xora, Emerson Collective and John Doerr among its backers.
Irrigreen
Irrigreen makes a digital, robotic sprinkler system that uses inkjet-printer-inspired technology to paint water onto a lawn with near-pixel precision. Custom zone shapes, weather-aware AI scheduling, and a single rotating head that replaces a half-dozen old-school sprays let homeowners cut outdoor water use by roughly 50% while keeping the grass green.
LEXI
LEXI is a California-founded IoT company that builds a universal, multi-protocol platform connecting smart-home and commercial-building devices across Wi-Fi, Bluetooth, Zigbee, Z-Wave, 900MHz, LoRaWAN, Thread and Matter. Its Universal IoT Gateway, white-label devices, mobile apps and cloud stack help enterprises retrofit buildings for energy efficiency and decarbonization compliance.
Nitricity
Nitricity is a Fremont, California climate-tech company turning air, water, renewable electricity and discarded almond shells into organic nitrogen fertilizer. Its flagship product, Ash Tea, replaces fossil-fuel-derived fertilizers with a regionally produced, OMRI- and CDFA-certified alternative that cuts emissions by more than 90%. Founded in 2018 by three Stanford PhDs, the company closed a $50M Series B in September 2025 and is building its first commercial plant in Delhi, California.
Fervo Energy
Fervo Energy is a Houston-based next-generation geothermal company that borrows horizontal drilling and fiber-optic sensing from the oil and gas playbook to make enhanced geothermal systems (EGS) commercially viable. By drilling into hot dry rock almost anywhere - not just rare natural hotspots - Fervo produces around-the-clock, carbon-free firm power. Its flagship Cape Station project in Utah is on track to be the world's largest next-generation geothermal development, and the company has become a go-to supplier of clean baseload electricity for AI data centers and utilities.
Utility Global
Utility Global is a Houston-based clean-energy technology company whose proprietary eXERO platform and H2Gen system produce high-purity hydrogen and a capture-ready CO2 stream from industrial off-gases and biogases - without using external electricity. By bolting onto the existing infrastructure of steel mills, refineries, petrochemical plants and other hard-to-abate sites, the company aims to make industrial decarbonization economically competitive with fossil-based hydrogen rather than dependent on subsidies or pilots.
Adden Energy
Adden Energy is a Harvard spinout building dynamically-stable, self-healing solid-state lithium-metal batteries designed to make electric vehicles charge in minutes, last a million miles, and never catch fire. Headquartered in Waltham, Massachusetts, the company is scaling its lab breakthrough into commercial pouch cells on a roll-to-roll pilot line and shipping samples to automakers for validation.
CREW Carbon
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.
Andes
Andes is a climate-tech and agricultural biotechnology company using beneficial soil microbes - applied as a seed coating on corn, soybean, canola and wheat - to convert atmospheric CO2 into stable soil inorganic carbon. Founded in 2016 by Gonzalo Fuenzalida and Tania Timmermann and headquartered in Alameda, California, Andes pairs microbial biology with field-scale measurement to deliver permanent, low-cost carbon removal across millions of acres of working farmland.
Archive
Archive is the technology platform behind brand-owned resale. It builds and operates customized secondhand storefronts for fashion and lifestyle brands - including The North Face, New Balance, Oscar de la Renta and Dr. Martens - so they can keep products in circulation, capture a new revenue stream, and meet customers who increasingly refuse to buy new.
Equilibrium Energy
Equilibrium Energy is a San Francisco-based clean power company building PowerOS, an agentic AI platform purpose-built for the power industry. Its flagship product, EQ Mission Control, optimizes battery storage and renewables portfolios across US power markets, blending grid physics, market modeling, and AI copilots.
Glacier
Glacier builds AI-powered robots that sort recyclables inside Material Recovery Facilities (MRFs). Their compact, conveyor-mounted robots use computer vision trained on billions of recycling images to identify and pick more than 70 material categories, while also generating real-time data on what flows through the waste stream - data that brands and recyclers use to prove and improve circularity.
Heirloom Carbon
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.
Chris Black
Chris Black is the CEO of GridX, Inc., an enterprise energy technology platform serving major US utilities. With nearly 30 years in technology and operations, he has been a central figure in the clean energy software sector - as CTO/COO at Tendril, he orchestrated the acquisitions that formed Uplight (now valued at $1.5B+), then invested via Huck Capital before taking the helm at GridX in April 2022 during its $40M Series C round. Under his leadership, GridX calculates 49 million bills daily, serves 40 million meters under contract, and models 1,000+ tariffs for utilities including PG&E, Southern California Edison, and ComEd.
Emily Gittins
Emily Gittins is the Co-founder and CEO of Archive, a B2B SaaS platform that powers branded resale programs for 50+ global fashion companies including The North Face, New Balance, and Oscar de la Renta. A Cambridge mathematics graduate turned Stanford MBA, Gittins built Archive after stints at BCG, Google X, and the Global Fashion Agenda, channeling her technical background and sustainability conviction into a company that has raised $76.9M - including a $30M Series B in February 2025 - and been named one of Fast Company's Most Innovative Companies of 2024.
Nicholas Flanders
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.
Raef Sully
Raef Sully is the CEO of Lilac Solutions, an Oakland-based company pioneering direct lithium extraction (DLE) technology using ceramic ion exchange beads. A structural engineer turned management consultant turned industrial executive, Sully brings 30+ years spanning tall buildings, the Australian Army Reserve, Bain & Company, and a decade running Nutrien's $10 billion nitrogen and phosphate division. He joined Lilac as COO in mid-2023 and ascended to CEO in February 2024 - the same month the company closed a $145 million Series C. Under his leadership, Lilac has achieved 87% lithium recovery at the Great Salt Lake, unveiled Gen 5 technology with 20x higher production rates, and signed a binding 10-year offtake agreement with Traxys North America targeting 50,000 tonnes of lithium product.