Extantia Capital
Extantia Capital is a climate-first venture capital firm dedicated to advancing the transition to a decarbonized world. The company focuses on investing in deep decarbonization technologies that aim to significantly reduce greenhouse gas emissions. Extantia seeks to identify and support mission-driven entrepreneurs and innovative companies with the potential to become "Gigacorns," defined as firms capable of saving over 1 gigaton of CO2e emissions annually. The firm evaluates investment opportunities based on their ability to deliver substantial CO2e reductions, targeting companies that can directly or indirectly mitigate at least 100 megatons of emissions each year. With more than €100 million in assets under management, Extantia Capital employs dual investment strategies: Extantia Flagship, which supports scalable deep decarbonization technologies, and Extantia Allstars, which invests in climate-focused venture capital funds. Through these efforts, Extantia aims to promote sustainable practices that benefit both the planet and humanity.
Top Stages
Past deals in Sustainability
RepAir
Series A in 2025
RepAir is a company focused on developing innovative technology to facilitate carbon removal from the atmosphere, aiming to contribute to a carbon-negative future. The company has created an electrochemical device that efficiently captures carbon dioxide by utilizing electricity. This device streams atmospheric air through a unique membrane that selectively separates carbon dioxide, releasing clean air back into the environment. RepAir's technology is designed for large-scale deployment, emphasizing environmental sustainability through its fully electric operation, which requires minimal energy and generates no hazardous materials or waste. By promoting renewable energy sources and reducing energy costs, RepAir positions itself as a leader in the transition towards more sustainable carbon management solutions.
Epoch Biodesign
Series A in 2025
Epoch Biodesign is focused on creating natural solutions to address climate challenges through innovative biotechnological advancements. The company specializes in the development of plastic-eating enzymes that facilitate biorecycling, a tunable enzymatic process that converts plastic waste into everyday chemicals. By leveraging insights from nature alongside expertise in computational and biological sciences, Epoch Biodesign enables efficient recycling of unrecyclable plastic waste into low-carbon chemicals. Their approach emphasizes intelligent navigation of sequence space to discover and develop products utilizing complex proteins, thereby advancing sustainable practices in waste management.
Modern Synthesis
Seed Round in 2025
Modern Synthesis is a biomaterials company focused on developing sustainable, biobased textiles for the fashion industry. By harnessing the capabilities of bacteria, the company creates customizable bio-textiles and composites that serve as eco-friendly alternatives to traditional materials. Their innovative approach utilizes bacterial nanocellulose, recognized for its strength and versatility, to produce textiles that do not rely on petrochemical binders or harmful chemicals. This process allows for the creation of a wide range of aesthetics and functionalities, meeting the diverse needs of designers while eliminating animal inputs. Modern Synthesis is positioned to transform the fashion industry by providing scalable solutions that integrate seamlessly with existing manufacturing practices, thereby reducing reliance on nonrenewable resources and promoting sustainable material usage.
Reverion
Series A in 2024
Reverion specializes in the development of innovative, reversible, carbon-negative power plants that harness biogas through patented technology. The company’s containerized units are designed for mass manufacturing and achieve remarkable electrical efficiencies of 80% for both power generation and energy storage. By effectively doubling the electricity output of traditional gas engines, Reverion’s technology not only enhances the performance of existing biogas plants but also mitigates greenhouse gas emissions, resulting in a negative CO2 balance. In addition to generating renewable energy, Reverion’s solutions utilize excess solar and wind power, thereby contributing to grid stability and promoting a renewable and decarbonized future.
UP Catalyst
Seed Round in 2024
UP Catalyst is a manufacturer focused on producing sustainable carbon nanomaterials and graphite for the green energy storage industry. The company specializes in utilizing carbon dioxide through electrolysis to recycle waste materials, addressing the growing demand for graphite while ensuring environmentally friendly sourcing of carbon materials. This innovative approach enables clients to incorporate UP Catalyst's nanomaterials into various applications, including battery and supercapacitor technologies, conductive and strengthening coatings, polymer formulations, and water filtration systems. Through its commitment to sustainability, UP Catalyst aims to contribute to the development of greener energy solutions.
SiTration
Seed Round in 2024
SiTration, founded in Cambridge, Massachusetts in 2020 by Brendan Smith, specializes in developing ultra-durable filtration membrane technology. This technology is designed to efficiently separate substances in harsh and challenging industrial environments while reducing energy consumption compared to conventional methods. The company's membranes combine the advantages of various state-of-the-art commercial membranes, offering users resource-efficient operations even in unpleasant industrial settings.
WASE
Venture Round in 2024
WASE is a London-based company founded in 2017, specializing in decentralized sanitation solutions aimed at promoting the global adoption of circular waste treatment. The company focuses on enhancing energy recovery from previously non-viable waste streams through its innovative waste-to-energy technology. In addition to energy recovery, WASE's system facilitates the recovery of water and nutrients, allowing for the production of fertilizers. By transforming waste into valuable resources, WASE empowers clients to harness the potential of waste to support sustainable practices and drive future growth.
UP Catalyst
Seed Round in 2023
UP Catalyst is a manufacturer focused on producing sustainable carbon nanomaterials and graphite for the green energy storage industry. The company specializes in utilizing carbon dioxide through electrolysis to recycle waste materials, addressing the growing demand for graphite while ensuring environmentally friendly sourcing of carbon materials. This innovative approach enables clients to incorporate UP Catalyst's nanomaterials into various applications, including battery and supercapacitor technologies, conductive and strengthening coatings, polymer formulations, and water filtration systems. Through its commitment to sustainability, UP Catalyst aims to contribute to the development of greener energy solutions.
Reverion
Seed Round in 2023
Reverion specializes in the development of innovative, reversible, carbon-negative power plants that harness biogas through patented technology. The company’s containerized units are designed for mass manufacturing and achieve remarkable electrical efficiencies of 80% for both power generation and energy storage. By effectively doubling the electricity output of traditional gas engines, Reverion’s technology not only enhances the performance of existing biogas plants but also mitigates greenhouse gas emissions, resulting in a negative CO2 balance. In addition to generating renewable energy, Reverion’s solutions utilize excess solar and wind power, thereby contributing to grid stability and promoting a renewable and decarbonized future.
RepAir
Series A in 2022
RepAir is a company focused on developing innovative technology to facilitate carbon removal from the atmosphere, aiming to contribute to a carbon-negative future. The company has created an electrochemical device that efficiently captures carbon dioxide by utilizing electricity. This device streams atmospheric air through a unique membrane that selectively separates carbon dioxide, releasing clean air back into the environment. RepAir's technology is designed for large-scale deployment, emphasizing environmental sustainability through its fully electric operation, which requires minimal energy and generates no hazardous materials or waste. By promoting renewable energy sources and reducing energy costs, RepAir positions itself as a leader in the transition towards more sustainable carbon management solutions.
Reverion
Seed Round in 2022
Reverion specializes in the development of innovative, reversible, carbon-negative power plants that harness biogas through patented technology. The company’s containerized units are designed for mass manufacturing and achieve remarkable electrical efficiencies of 80% for both power generation and energy storage. By effectively doubling the electricity output of traditional gas engines, Reverion’s technology not only enhances the performance of existing biogas plants but also mitigates greenhouse gas emissions, resulting in a negative CO2 balance. In addition to generating renewable energy, Reverion’s solutions utilize excess solar and wind power, thereby contributing to grid stability and promoting a renewable and decarbonized future.
INERATEC
Series A in 2022
INERATEC is a company dedicated to developing innovative synthetic fuels and power-to-X plants that aim to replace fossil fuels with carbon-neutral alternatives. By focusing on sustainable energy solutions, INERATEC produces renewable hydrogen and utilizes greenhouse gases like carbon dioxide to create e-kerosene, carbon dioxide-neutral diesel, synthetic waxes, and methanol. These products allow chemical plant operators to power their facilities with synthetic fuels derived from climate-neutral energy sources, thereby reducing chemical waste and enhancing climate protection. Through its efforts, INERATEC contributes to the advancement of a post-fossil fuel economy and supports the transition to sustainable energy in transportation and everyday products.
Betteries
Seed Round in 2021
Betteries is a provider of innovative power solutions that focus on delivering mobile and affordable energy. The company offers multipurpose power systems capable of storing between 3 kWh to 12 kWh of energy, featuring fast charging capabilities and the ability to deliver up to 5 kW of both DC and AC power. Its modular design allows for horizontal or vertical stacking and is compatible with various energy sources for charging. Equipped with smart electronics, including Wi-Fi and GPS, Betteries systems can be monitored and controlled remotely via an IoT platform. The rugged and waterproof design makes them suitable for diverse applications such as e-mobility, off-grid productive use, and on-grid backup power. Betteries emphasizes sustainability by adhering to circular economy principles, ensuring recycling of batteries at the end of their lifecycle while providing cost-effective battery-as-a-service solutions.
Bloom Biorenewables
Seed Round in 2021
Bloom Biorenewables Ltd is a Swiss company established in 2019, specializing in the development of innovative technologies that convert wood and agricultural waste into renewable materials as substitutes for petroleum-based products. The company focuses on producing bio-based materials for various sectors, including fragrances, plastics, and textiles, thereby offering sustainable alternatives to fossil fuels. By introducing a novel approach to the production of biorenewable products and fuels, Bloom Biorenewables aims to make a significant impact in promoting the use of sustainable resources and addressing climate change challenges.
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