Cleantech Startups
5,220 companies tagged Cleantech, with their investors and founders.
Aqua-Cell Energy develops a saltwater flow battery that stores energy by pumping salt-water electrolyte through a battery stack, targeting affordable long-duration (12h+) grid energy storage. It serves municipal electricity distributors, commercial and industrial facilities, microgrids, remote communities, and backup power applications with a modular, container-sized system.
2 investors
Aquagga develops field-deployable technology that uses a patented hydrothermal process to permanently destroy PFAS chemicals, breaking them down into harmless byproducts. It serves industries, municipalities, and government agencies seeking to address PFAS water contamination.
2 investors
AquaLith manufactures next-generation batteries and battery materials, developing new material chemistries that increase energy density and reduce charging time for consumer electronics and electric vehicles. The technology aims to be safer, less expensive, and effective at very low temperatures.
2 investors
Aquaporo manufactures drinking water directly from atmospheric humidity using proprietary ALMA technology, offering residential units (Droplet) and industrial modular systems (Stream) for on-site water production.
2 investors
Aquaria develops atmospheric water generation technology that harvests drinking water from the air. The company aims to provide clean water supply to people and communities.
2 investors
Aquatic Labs develops solid-state, semiconductor-based water sensors that measure parameters such as pH, total alkalinity, conductivity, and temperature without consumable reagents, paired with a data pipeline for real-time insights. It offers an end-to-end aquatic monitoring solution using scalable sensor networks and sensor fusion for environmental water measurement.
2 investors
AquiSense develops UV-C LED water disinfection systems that treat water without chemicals, serving homes, factories, restaurants, remote communities, and space applications. It also makes UV-C LED products for laboratory research and for air and surface disinfection.
2 investors
Arbonics builds data-driven tools that help landowners use their forests for climate action and carbon markets. The company operates in the forestry, carbon and climate-tech space.
2 investors
Arbor is a carbon accounting and sustainability reporting platform that automates product-level and Scope 1, 2, and 3 emissions calculations. It generates GHG Protocol-compliant reports to help companies meet regulations such as CSRD, CBAM, SEC, and CDP.
2 investors
Areg.AI offers an AI- and robotics-driven platform for autonomous monitoring, inspection, and maintenance of solar assets, aimed at solar operations and asset management teams. Its modules cover dashboards, digital twin modeling, drone thermal inspection, forecasting, and financial planning to shift solar O&M from reactive to autonomous.
2 investors
Arinna develops solar power technology for sustainable applications on Earth and in space. Founded by Stanford PhDs with a focus on using sunlight as an energy source.
2 investors
Ascendance develops hybrid-electric propulsion systems for next-generation aircraft and unmanned aerial vehicles, serving civil and defence operators seeking improved range, efficiency, and reduced environmental impact. The company's technology combines thermal and electric power to enable aircraft with significantly greater endurance and faster turnaround times than conventional alternatives.
2 investors
Ascension develops technology related to the extraction or supply of critical materials used in applications such as magnets for wind turbines, solar panel coatings, speakers, displays, and batteries. These materials support renewable energy and electronics manufacturing.
2 investors
Aston provides power capacity for data centers, delivering generation, transmission, storage, and orchestration software as an integrated stack at gigawatt scale. It offers reserved power capacity through single capacity agreements with guaranteed availability, targeting energization within two to three years.
2 investors
Atium develops a patent-pending electrochemical technology for selective removal of mercury from water, wastewater, and acids. Its first product helps dental clinics capture dissolved mercury ions to reduce emissions, with applications spanning industrial wastewater treatment, environmental sanitation, and acid purification.
2 investors
Atmeto develops machine learning technology for clean energy generation, aiming to decouple carbon dioxide emissions from energy production.
2 investors
Atmose builds instruments to measure and condition ultrafine aerosol particles in a range of field locations, addressing gaps in conventional air-quality measurement systems. A University of Cambridge spinout, it develops aerosol-science hardware for air pollution and climate monitoring applications.
2 investors
Atomis develops metal-organic frameworks (MOFs) and porous materials for gas control applications including separation, recovery, and storage. The company serves multiple industries including environmental remediation, energy, and life support systems.
2 investors
Attron Automotive develops IPM PMSM electric motors and motor controllers, combined with its proprietary Eta firmware and algorithm framework, to build integrated electric propulsion systems. Its systems serve electric mobility, agriculture, defence, industrial, marine, and aviation applications.
2 investors
Aurea Technologies builds portable wind turbines for personal and tactical use, including the Shine Turbine for consumer device charging and the RISE Turbine for military operations. Its products let individuals generate their own wind energy while camping, in emergencies, or in the field.
2 investors
Aurelia manufactures efficient turbines for power generation that operate on multiple fuel types including hydrogen and biogas, with a compact design requiring fewer moving parts and lower maintenance compared to conventional turbines.
2 investors
Autoridad Panandina is an energy infrastructure company that develops projects to supply power for large-scale compute deployments in regions with abundant energy resources.
2 investors
Azaneo develops fully electric weed control technology that kills weeds using electroporation—a fast electric pulse that disrupts plant cells—without herbicides, chemicals, or heat-based soil damage. The system is designed for agricultural weed management with high energy efficiency and operation in all weather conditions.
2 investors
B'ZEOS develops seaweed-based packaging materials as an alternative to fossil fuel-based plastics. Its products are bio-based and home-compostable, aimed at replacing conventional plastic packaging.
2 investors