Cleantech Startups

Carbyon develops direct air capture technology to remove CO2 from the atmosphere and supply it as circular CO2. The company is working toward its first demonstrator and scaling manufacturing capacity for its capture systems.

8 investors

Charm Industrial converts agricultural residues into bio-oil and injects it underground to remove carbon from the atmosphere at scale. The company serves organizations like Stripe, Shopify, and Microsoft seeking carbon removal solutions.

8 investors

Cloverly provides Catalyst, a commercial operating system for carbon credit project developers to manage inventory, pricing, sales, and delivery and to reach sales channels and buyers from one system. It serves developers of nature-based, hybrid, and engineered carbon removal and reduction projects.

8 investors

CruxOCM develops AI-powered automation software for industrial control room operations in energy infrastructure, enabling autonomous monitoring and control to improve throughput and reduce operational risk.

8 investors

Euclid Power provides software and technical services that help renewable energy teams organize project documents, convert them into structured verified data, and manage projects across their lifecycle. It serves renewable energy developers and investors, offering document processing tools alongside a services team for strategic guidance.

8 investors

Harvest Thermal combines high-efficiency heat pumps with a smart thermal battery (water-tank heat storage) and a controller (the Harvest Pod) to provide home heating, hot water, and air conditioning while lowering utility bills and emissions. The company sells to homeowners and offers a lease option (the Harvest Comfort Plan) with no upfront cost.

8 investors

Kelvin builds products to modernize legacy radiator-heated buildings, including a smart radiator cover (the Cozy) and an Adaptive Electrification platform that replaces window ACs with smart heat pumps. Its systems work with a building's existing boiler, controls, radiators, and windows to reduce heating and cooling costs, improve resident comfort, and help buildings comply with local sustainability laws.

8 investors

KoBold Metals applies AI and scientific computing to mineral exploration for critical minerals including copper, cobalt, lithium, and nickel needed for electrification and the clean energy economy. The company combines advanced technology with expert human intelligence to accelerate discovery and reduce the cost per discovery in mineral exploration.

8 investors

Lunar Energy develops home energy technology that converts and stores solar power to provide continuous clean electricity for residential customers. The company focuses on powering homes with solar-derived energy around the clock.

8 investors

MITO Material Solutions develops patented hybrid additive technology that enhances fiber-reinforced composites and thermoplastics by functionalizing materials like graphene oxide and biomaterials, serving the manufacturing industry. The platform improves strength, durability, flexibility, and sustainability without requiring changes to existing manufacturing processes.

8 investors

Nevoya is a fully-electric trucking carrier that moves freight for shippers and third-party logistics providers, combining zero-emission vehicles with AI-driven operations. It operates in the logistics and freight transportation industry.

8 investors

NxLite develops sustainable coatings and glazing solutions for building windows and glass to improve energy efficiency and reduce heating/cooling energy loss. The company serves the building industry with products designed to enhance energy conservation and lower greenhouse gas emissions.

8 investors

Overview Energy develops space-based solar power systems that beam energy from space to Earth, drawing on expertise in aerospace, energy systems, and manufacturing. The company operates in the energy and space technology sector.

8 investors

Proterra designs and manufactures zero-emission battery systems for commercial vehicles. The company provides battery solutions tailored for integration into large commercial and on/off-highway vehicles, along with engineering support, training, and service.

8 investors

Rainmaker uses cloud seeding technology to combat water scarcity by generating freshwater at scale. The company operates in the climate tech and water security sector, positioning cloud seeding as a more efficient alternative to desalination and water pipelines.

8 investors

Rheaply provides a platform that enables organizations to create sharing economies by connecting users with underutilized workplace resources, allowing goods and materials to find new uses rather than be discarded. The company applies circular economy principles across industries to help organizations source goods more efficiently while reducing waste.

8 investors

Surf Air Mobility operates regional air travel across the U.S. through scheduled flights, on-demand private charter booking, and electric aviation technology. It combines air carrier services with software and aircraft electrification aimed at expanding regional air mobility.

8 investors

Sylvera provides carbon credit ratings, pricing intelligence, and market forecasts covering voluntary, CORSIA, and Article 6 markets to help investors identify opportunities, value portfolios, and underwrite delivery risk. Its platform includes pre-issuance ratings, real-time spot pricing, buyer activity data across 40,000+ companies, and a marketplace connecting buyers and suppliers.

8 investors

Thea Energy develops fusion energy systems based on a stellarator architecture that replaces complex 3D magnet coils with arrays of mass-manufacturable planar magnets controlled by software. Its first system, Eos, is a neutron source stellarator intended to demonstrate fusion performance and de-risk its planned fusion power plant, Helios.

8 investors

Turntide develops electrification technology and powertrain components—including motors, inverters, and batteries—for OEMs building electric vehicles and other moving machinery. It positions itself as an end-to-end partner that works with clients' engineering teams from concept through production, adapting components to specific vehicle architectures.

8 investors

Zypp Electric is an India-based EV rental platform that rents electric scooters and loaders to gig-economy delivery workers, providing IoT-enabled vehicles, battery-swapping infrastructure, and 24/7 support. It serves last-mile delivery riders working with platforms like Blinkit and Zepto, aiming to reduce fuel costs and carbon emissions.

8 investors

Aether Fuels develops technology to convert syngas and carbon feedstocks into sustainable fuels, using its Aether Aurora solution built on technology licensed from GTI Energy. The company targets the energy transition and net-zero market through gasification-to-liquids and fuel production projects.

7 investors

Atomic Alchemy developed technology and facilities for producing radioisotopes for medical, industrial, and research applications, planning dedicated isotope-production reactors in Idaho. Acquired by Oklo in 2024.

7 investors

Ayrton Energy develops a hydrogen storage and transport solution based on a proprietary liquid organic hydrogen carrier (LOHC) and electrochemistry, storing hydrogen as a liquid at ambient conditions so it can be moved using existing fuel infrastructure. Its e-LOHC technology serves hydrogen producers, transporters, and end-users in the hydrogen energy supply chain.

7 investors