Climate Tech Startups

Altiro Energy develops an iron-based energy storage system that stores renewable or excess energy as reusable CO2-free iron fuel and later releases it as on-demand heat or power, producing rust that is recharged for the next cycle. It targets large renewable energy producers seeking to stockpile and distribute energy to consumers.

3 investors

Ambient Fuels develops and finances green hydrogen projects across the US and internationally, handling site feasibility through production of hydrogen derivatives such as eFuels and ammonia. It serves industrial customers seeking to buy hydrogen gas or fully financed hydrogen projects for heavy industry use cases.

3 investors

AMPECO provides a software platform that enables retail companies to deploy and manage EV charging stations in their locations, attracting customers and generating revenue while integrating with existing retail systems. The platform includes features for pricing management, payment processing, loyalty program integration, and white-label mobile apps.

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

Aquaai builds bio-inspired, fishlike underwater vehicles equipped with cameras and plug-and-play sensors to collect subsurface water data, offered on a Fish-as-a-Service model. The data is delivered through a web dashboard using AI and computer vision for water quality monitoring and environmental protection.

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

Arable provides in-field sensors (such as the Mark 3) and apps that deliver real-time rainfall, crop water use, and irrigation data to help growers optimize irrigation. It serves farmers and enterprises pursuing water stewardship and conservation goals, combining ground-truth field data with agronomic models for reporting on watershed health and productivity.

3 investors

Arbol provides parametric insurance products that pay out based on objective third-party climate data after qualifying events, covering specific climate risks for clients ranging from smallholder farmers to large corporations. It uses AI/ML and a data platform drawing on sources like NOAA, NASA, and ESA to underwrite coverage and support agents and brokers.

3 investors

Arkadiah develops nature-based investment solutions and monitoring technology for natural capital projects, offering carbon credits and ecosystem services returns primarily in Southeast Asia. The company provides AI-powered asset assessment tools and curates investment opportunities in sustainable land management and environmental conservation.

3 investors

Atlantic Fish produces cultivated seafood by growing fish from muscle cells, offering a domestically produced, contaminant-free alternative to wild-caught fish. The company aims to create a scalable and sustainable source of seafood.

3 investors

The Better Meat Co. develops fermentation-based technology to produce alternative protein ingredients, aiming to build a more sustainable food system. It applies expertise from the food and agriculture industry to create novel proteins.

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

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

Boston Geospatial provides geospatial intelligence tools for risk screening, near real-time alerts, and monitoring of natural and anthropogenic threats such as geohazards, flooding, and fire. It uses curated datasets, optical imaging change detection, and satellite radar interferometry to help organizations identify and manage exposure to natural threats to their assets.

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

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

Burnt Island Ventures is a venture capital firm that invests in and supports startups building water-related technologies, with a focus on addressing water challenges tied to climate change.

3 investors

BuyPower operates a bill payment platform serving African individuals and businesses, offering consumer energy bill payment, vendor payment services for businesses, and an energy data product for lenders conducting credit assessments.

3 investors

Calice builds models that analyze agricultural environmental signals—including climate event timing, soil dynamics, and crop cycle interactions—to explain why agricultural products succeed or fail across different seasons and planting dates.

3 investors

Calyx Global provides independent, science-based ratings and analysis of carbon credits across 30+ project types, along with pre-verification project risk assessments and advisory services. It serves carbon market participants such as buyers and investors evaluating carbon credit quality and integrity, operating on a subscriber-funded model.

3 investors

carbmee provides the Environmental Intelligence System (EIS™), a platform that embeds real-time carbon and environmental data into a company's core business systems for emissions reporting and reduction. It serves enterprises aiming to lower cost, risk, and carbon emissions at scale.

3 investors

Carbo Culture develops carbon removal technology leveraging natural processes combined with advanced engineering to remove carbon dioxide from the atmosphere at scale. The company operates as a project developer focused on climate mitigation solutions for global carbon removal markets.

3 investors

C1 develops a homogeneous catalysis process and containerized reactor to mass-produce high-purity green methanol from non-fossil feedstock at low pressure and temperature, for the shipping and chemical industries. The company operates the Leuna100 pilot plant in Leuna, Germany to validate its technology.

3 investors