Cleantech Startups
5,222 companies tagged Cleantech, with their investors and founders.
Andean develops sustainable extraction of critical metals and offers recycling of electronic waste and industrial scrap. It works with partners to source critical metals and build a more circular, resilient supply chain.
3 investors
Anessa provides a software suite that uses data analytics and AI to support anaerobic digestion and biogas projects, covering feasibility evaluation, feedstock recipe optimization, and real-time facility performance monitoring. It serves operators and developers of biogas and renewable natural gas (RNG) facilities.
3 investors
Antora Energy builds factory-made thermal batteries that store intermittent low-cost electricity as heat in carbon blocks and deliver around-the-clock heat and power at scales from megawatts to gigawatts. It serves industrial facilities, data centers, and the grid, with deployments such as a 5 GWh project for biofuels producer POET.
3 investors
Applied Bioplastics develops sustainable plastic and composite materials, including BioFi (a thermoplastic combining agricultural waste with standard, recycled, or biobased polymers) and BTR Board (a biothermoset resin composite made with woven jute fiber). Its products can be processed with standard injection molding and extrusion equipment and serve manufacturers in the household, automotive, appliance, electronics, and outdoor equipment industries.
3 investors
Aquacycl provides onsite industrial wastewater treatment using its patented technology to treat high-strength wastewater without dilution, offering energy-neutral operation, lower greenhouse gas emissions, and water reuse. It serves businesses seeking to meet corporate ESG, carbon, and water management goals.
3 investors
Aquarry provides mining companies a process to remediate closed open-pit mine lakes by dissolving alkaline minerals to absorb CO2 and reprocess tailings and waste rock, recovering critical metals while reducing closure costs and carbon tax liabilities. It designs the technology and handles validation, registration, and sale of the resulting carbon credits.
3 investors
Astranova Mobility (formerly Electrifi Mobility) provides a full-stack platform for electrifying commercial vehicle fleets in India, covering vehicle sourcing from OEMs, financing and operating leases, maintenance, refurbishment, and energy solutions. It works with fleet operators across asset classes including electric two/three-wheelers, LCVs, passenger cars, charging infrastructure, and batteries, along with financing partners.
3 investors
Atlas Organics collects and recycles organic waste from homes and businesses into compost and soil amendment products for landscapers, farmers, nurseries, and home growers, and helps municipalities set up composting facilities. It operates across the Southeastern United States, including multiple locations in Florida.
3 investors
Accure offers a predictive battery analytics platform that uses AI and cloud computing to monitor Li-ion battery fleets across procurement, quality assurance, commissioning, operations, and augmentation. It serves energy storage industry operators, helping them accelerate commissioning, correct state-of-charge inaccuracies, and avoid unplanned downtime.
3 investors
BatX operates physical lithium-ion battery recycling infrastructure — collection, mechanical preprocessing, black mass production, and hydrometallurgical refining — to recover battery-grade materials such as lithium carbonate, cobalt sulphate, nickel sulphate, and manganese carbonate. It supplies these recovered materials to cathode manufacturers, cell makers, and industrial buyers, and provides OEMs and fleet operators a compliant destination for end-of-life batteries, focused on the Indian market.
3 investors
Bees & Bears operates a technology platform that lets installers offer end customers installment financing for green hardware such as solar panels, energy storage systems, and heat pumps, with real-time credit decisions and staged payouts to the installer. The service targets installation companies and homeowners in Germany.
3 investors
Bettani produces dairy-free cheese using a proprietary plant-based protein derived from regenerative crop seeds, offering products with comparable taste, texture, and protein content to conventional dairy cheese. The company targets consumers with lactose intolerance, dairy allergies, and environmentally conscious buyers.
3 investors
Bib Batteries develops technology to standardize and certify battery health assessments for electric vehicles, enabling transparent condition evaluation across the second-hand EV market and value chain. The company targets OEMs, lessors, fleets, and marketplaces across Europe to reduce adoption friction and build trust in electric mobility.
3 investors
Bio Eutectics develops Natural Deep Eutectic Systems, bio-sourced solvents made from natural acids, amino acids, alcohols, and sugars to replace petrochemical solvents in industrial processes. It customizes these green chemistry solutions for manufacturers across industries seeking lower-toxicity, lower-volatility alternatives.
3 investors
Bioweg develops biodegradable, bio-based ingredients using microbes and green chemistry to replace microplastics, synthetic polymers, and petroleum-based additives in cosmetics, personal care, agriculture, and food applications. The company creates customizable solutions from food industry waste streams for sustainable alternatives to conventional chemical additives.
3 investors
Awair develops indoor air quality monitoring and management solutions for homes, workplaces, schools, and commercial spaces. The company helps users track and improve air safety in indoor environments.
3 investors
Blitz provides white-label express and last-mile logistics services using an all-electric vehicle fleet, letting businesses run deliveries under their own brand with customizable SLAs, live tracking, and cash-on-delivery support. It serves enterprise clients across sectors such as food and beverage, e-commerce, healthcare and pharma, and retail, operating in 60+ cities across Indonesia.
3 investors
Bloom Biorenewables converts wood residue biomass into renewable performance ingredients—such as white lignin, dipropylxylose (DPX), and microfibrillated celluloses—used as a formulation platform for the personal care, functional paper, and paints & coatings industries. The company produces these ingredients at industrial multi-ton scale as an alternative to conventional petroleum-based materials.
3 investors
BlueLayer provides software for the carbon and climate markets, serving climate investors, project developers, and other industry participants. The company combines a platform with access to a community of climate investors and executives.
3 investors
Bodhi is a design-focused software company that provides customer experience software for the residential solar industry, using data automation and behavioral science to engage homeowners. Its platform helps solar providers manage and improve the customer experience.
3 investors
Boldr provides a mobile app and energy-saving home climate products that help homeowners monitor and control their HVAC systems, reduce energy consumption, and track usage through real-time data. The company also offers appliance health monitoring for mini split systems to extend equipment lifespan and prevent cooling issues.
3 investors
BoxPower provides turnkey solar microgrid systems that combine solar, battery storage, and backup generators, handling project development, engineering, installation, monitoring, and maintenance. It uses its EASI software for energy audits and system design to deploy standardized, prefabricated microgrids for rural businesses, communities, and utilities in off-grid, grid-tied, and hybrid environments.
3 investors
BrightSource Energy develops OASES, a cloud-based energy management and optimization platform that uses AI and physics-based modeling to optimize renewable energy and storage portfolios including photovoltaics, battery storage, microgrids, wind turbines, and EV charging. It serves energy providers and asset operators with forecasting, automated market bidding, and real-time revenue optimization across their renewable and grid assets.
3 investors
Brineworks develops an electrochemical Direct Air Capture system that uses electrolyzer technology and renewably powered intermittent operation to capture CO₂ at low cost. Its CO₂ is aimed at e-fuel producers (e-SAF, e-NG, e-Methanol), carbon dioxide removal, and other CCUS applications.
3 investors