Cleantech Startups

AtmosZero builds modular electrified heat pump boilers that draw heat from ambient air to produce emissions-free industrial steam as a drop-in replacement for fuel-burning boilers. It targets industrial manufacturers and district heating operators across sectors such as food and beverage, pharmaceuticals, chemicals, pulp and paper, and campus/city heating.

4 investors

Avarni provides AI-powered software that helps finance, compliance and sustainability teams measure supply-chain carbon emissions and meet sustainability reporting regulations. The platform processes corporate data using a global supplier network to support carbon footprint measurement and net-zero compliance, with a focus on Australian organisations.

4 investors

Avertana extracts minerals and chemicals from steel manufacturing waste slag using chemical processes, producing sustainable raw materials for industrial manufacturers. The company's circular economy technology replaces conventional mining and refining with waste-derived alternatives that have lower environmental impact and cost.

4 investors

Axle Energy develops software connecting electric vehicles, heat pumps, solar panels, and batteries to electricity markets to balance grid supply and demand without fossil fuels. The company serves grid operators and enables decarbonization of the electricity grid.

4 investors

BasiGo provides electric buses designed for African public transport, along with a pay-as-you-drive leasing model that removes the high upfront cost of ownership and a charging and service network. It serves bus owners and operators seeking low-carbon alternatives to diesel fleets across Africa.

4 investors

Beev helps companies electrify their vehicle fleets by providing multi-brand electric vehicle leasing, installation of charging stations at company sites and employees' homes, and a fleet management tool that centralizes costs, contracts, vehicles and charging along with tax and car-policy guidance. It also serves individuals for home EV charger installation and operates in France.

4 investors

BETA Technologies develops electric aircraft (including the ALIA eVTOL) and associated charging infrastructure for sustainable aviation. The company also runs a flight school and works with the FAA and other regulators on aircraft certification.

4 investors

Beyond The Dome builds a modular, automated system for wastewater treatment facilities that destroys biosolids and treats sludge, eliminating organics including PFAS, microplastics, and pharmaceuticals while recovering water, minerals, and energy. The self-contained system integrates into existing infrastructure and reduces hauling volume, labor, and nutrient loading.

4 investors

BioPlaster produces compostable and biodegradable packaging—including cushioning foam (GreenShell), packaging films, and reusable bags—made primarily from brown seaweed (sargassum) biomass. It targets businesses seeking sustainable alternatives to conventional plastic for applications like delivery, shopping, and secondary packaging.

4 investors

BluumBio identifies and deploys naturally occurring enzymes from fungi, trees, and bacteria to remove industrial pollutants from soil, air, and water. The company serves environmental remediation projects requiring rapid decontamination of petroleum, pesticides, plastics, and other synthetic chemicals.

4 investors

Booster operates a mobile fuel delivery service that brings gasoline and diesel directly to customers, eliminating the need for underground storage tanks at traditional gas stations. The company serves vehicle fleets and aims to reduce environmental contamination and emissions through safer, on-demand fueling.

4 investors

BTRY develops ultra-thin, solid-state thin-film batteries using a scalable production technology. Its energy storage solutions target IoT, medical technology, and consumer electronics applications.

4 investors

California Catalysts develops advanced materials and catalysts for hydrogen electrolysis using AI-driven discovery methods. The company partners with electrolyzer manufacturers to commercialize low-cost, non-iridium catalysts and coatings that improve green hydrogen production performance and economics.

4 investors

Capalo AI develops AI-powered software to optimize energy storage systems, lower price volatility, and reduce carbon emissions. The company serves energy storage owners and utilities seeking to maximize asset value and integrate renewable energy.

4 investors

CapeZero is a cloud-based project finance modeling platform that centralizes and operationalizes financing data, replacing spreadsheet models with investor-grade models and real-time analysis. It is built for clean energy developers and cross-functional teams in development, origination, underwriting, M&A, and finance to evaluate deals and capital decisions.

4 investors

Captivate develops a proprietary Metal-Organic Framework material and Vacuum Pressure Swing Adsorption process for low-energy, cost-effective carbon dioxide capture and separation in industrial applications including biogas, geothermal, and cement production.

4 investors

CarbonCure develops technologies that inject captured CO₂ into fresh concrete during mixing, where it mineralizes and permanently embeds in the material while reducing the amount of cement needed. The company sells these systems to cement and concrete producers to help lower the embodied carbon of concrete and the built environment.

4 investors

Carbon Upcycling captures CO2 and converts industrial byproducts — such as iron and steel slag, coal ash, and mine tailings — into low-carbon cement and materials for cement, steel, energy, and mining manufacturers. It offers carbon utilization technology that helps producers decarbonize and build domestic supplies of low-carbon materials from local resources.

4 investors

Carbonfuture operates a digital platform for the monitoring, reporting, and verification of durable carbon removal, supporting projects from due diligence through third-party verification and certification. It serves carbon removal suppliers seeking certification and market access, as well as buyers looking for vetted portfolios of carbon removal credits.

4 investors

Chakr Innovation is a cleantech and material science company that develops retrofit emission control devices, dust suppression systems, emission monitoring solutions, and aluminium-air energy products to reduce air pollution. It serves industrial facilities, corporates, real estate developers, and public sector organizations in India, with a flagship RECD that cuts diesel generator emissions by up to 90%.

4 investors

Chiral develops electron spin alignment technologies and applications based on the CISS effect to reduce resistivity and overpotential waste, enabling sustainable and higher-performance solutions.

4 investors

Circuit operates all-electric shared ride services aimed at providing low-cost or free, accessible transit that complements existing local infrastructure. It serves communities and municipalities, including transit deserts, and offers wheelchair-accessible vehicle (WAV) options, funded through partners and advertisers.

4 investors

CleanElectric develops EV battery packs featuring rapid-charging and swappable technology across multiple product series for two-, three-, and four-wheeler vehicles as well as stationary energy storage. Its batteries support fast charging, LFP fireproof chemistry, and compatibility with public charging standards like Bharat DC001 and CCS.

4 investors

Climatize is a financial platform that enables retail investors to fund renewable energy projects across the United States with minimum investments of $10, offering potential annual returns up to 10%. The platform vets climate and renewable energy projects and serves individual impact investors seeking to combine financial returns with climate action.

4 investors