Climate Tech Startups

AlphaGeo builds a large spatial and temporal database of geocoded variables and applies geospatial modeling, machine learning, and generative AI to forecast the impact of geopolitical, climate, demographic, and economic trends on locations and real estate. It serves asset managers, real estate developers, and other stakeholders making location and resilience-focused investment decisions.

2 investors

Altum Technologies develops ultrasound technology for industrial cleaning, fouling prevention, and separation in production processes. The system is installed externally on existing equipment without requiring process modifications and can be remotely monitored via IoT.

2 investors

Anaconda Systems designs and builds in-vessel composting facilities that convert urban organic waste into fertilizer soil amendment in under 10 days without mechanical agitation. It provides turnkey organic waste processing infrastructure for municipalities and private waste services, with a pilot facility in Vancouver, BC.

2 investors

Anesco develops, builds, operates and optimises grid-scale solar and battery storage assets, and provides energy efficiency services to UK utilities, local authorities and social housing through the ECO scheme. It serves renewable energy investors and works across the UK and northern Europe including Ireland, the Netherlands, Denmark and Belgium.

2 investors

Another Earth builds an AI-powered simulation and synthetic data engine that generates annotated variations of synthetic satellite imagery to train and scale AI models for Earth Observation. It serves geospatial and remote-sensing use cases in areas such as mining and raw materials exploration and environmental monitoring.

2 investors

Xpansiv (formerly APX) operates an integrated platform for trading, tracking, and monetizing energy and environmental commodities, including renewable energy certificates, carbon credits, and clean fuel credits. It serves financial institutions, corporations, governments, and power producers, offering trading, brokerage, registry, and wholesale power services worldwide.

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

Aquanzo is a company focused on marine life preservation and improving the food chain, working on feed as part of aquaculture and food sustainability. The page references RAS (recirculating aquaculture system) engineering and food chain sustainability.

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

Arariwa is a Peruvian organization that works with rural communities to promote sustainable development through environmental management, sustainable local economic development, strengthening of local and regional institutions, and inclusive community social development.

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

Arevo develops a proprietary crop nutrition technology (Arginex) that activates the plant root zone to improve nutrient uptake, offering growers an alternative to conventional mineral fertilisers. Based on research from the Swedish University of Agricultural Sciences, it serves agricultural producers and formulators seeking to reduce reliance on chemical inputs.

2 investors

Ashored develops fixed-gear fishing technology aimed at reducing marine animal entanglements caused by traditional buoy-and-rope trap systems. The company targets the commercial fishing industry with gear designed to lower risks to protected species such as the North Atlantic Right Whale.

2 investors

GreenFi (formerly Aspiration's consumer finance brand) offers climate-friendly banking and investing, including checking, savings, and investment accounts whose deposits avoid funding fossil fuels. Planned products include high-yield savings, climate-friendly credit cards, impact investments, and sustainable loans for environmentally conscious consumers.

2 investors

Astral Systems develops fusion technology to produce medical isotopes and power decentralised energy solutions for healthcare providers and researchers.

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

Atmen is a regulatory technology company that provides a data platform automating certification and compliance workflows for renewable fuel producers, covering green hydrogen, e-methane, ammonia, biomethane, HVO and SAF. Its software turns operational supply chain data into auditable sustainability proofs and audit-ready reports for producers navigating schemes like RFNBO and low-carbon fuel standards across energy-intensive industries.

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

Attributes™ provides a blockchain-based digital registry that tracks the origin and ESG attributes of energy from production to end users. It offers a web application for companies to gain visibility into their energy value chain, with features for data upload automation, security, and certification.

2 investors

B Lab is a global nonprofit that certifies businesses as B Corporations against verified social, environmental, and governance standards, and operates the B Impact platform for companies to measure their impact. It runs a worldwide community and movement working toward a more inclusive and equitable economic system, with local teams in over 100 countries.

2 investors

Boomerang is a platform or service focused on carbon capture and climate research, supporting mitigation of industrial emissions through research funding and donations to environmental initiatives.

2 investors