Clean Energy Ventures

Clean Energy Ventures, established in 2017 and based in Boston, Massachusetts, is a venture capital firm focused on investing in early-stage climate technology companies. It specializes in seed and early-stage investments, primarily in North America, Europe, and Israel. The firm concentrates on advanced energy innovations that address climate change, including energy storage, grid connectivity, renewable energy production, clean transportation, and the water/energy nexus. Clean Energy Ventures not only provides capital but also leverages its network and expertise to support these startups in achieving significant scale and commercial success.

Anne Andrew JD

Partner

Micha Ben-Naim

Investor

John Bobrowich

Venture Partner

Yi Jean Chow

Principal

Yi-Jean Chow

Investment Principal

Matthew Cohen

Principal

Matt Cohen

Principal

Ted Dillon

COO

Ralph Earle III

Managing Director

James Ellis

Partner

James Ellis

Venture Partner

Temple Fennell

Co-Founder and Managing Partner

Virginia Foote

Venture Partner

Dan Goldman

Co-Founder and Managing Partner

Shanbor Gupta

Principal

Renu Gupta

Partner

John Harper

Venture Partner

Ariel Hyre

Analyst

Bradley Jones

Partner

Tal Levy

Partner

Raffi Mardirosian

Partner

David S. Miller

Co-Founder and Managing Director

Francois Odouard

Partner

Willy Osborn

Venture Partner

Jean-Noël Poirier

Venture Partner

Wynston Reed

Investor

Wanda Reindorf

Venture Partner

Peter Schewinfurth

Partner

Louis Schick

Director of Investments

Lou Schick

Director of Investments

Peter Sopher

Investment Partner

Cara Tobin

Venture Partner

Mitchell Tyson

Venture Partner

Jeffrey Weiss

Senior Venture Partner

John Wisniewski

Partner

Amy Zhao

Investor

Zaurie Zimmerman

Partner

David Miller Ph.D

Co-Founder and Managing Partner

Adam de Sola Pool

Partner

Kedar Gupta Ph.D

Partner

Past deals in Sustainability

Queens Carbon

Seed Round in 2025
Queens Carbon is focused on developing a hydrothermal processing technology aimed at significantly reducing energy consumption in industrial applications. This innovative system minimizes the energy required for calcination and material synthesis, which is essential for carbon capture and the production of carbon-neutral cement. By enhancing energy efficiency, Queens Carbon's technology not only lowers operational costs but also contributes to a reduction in greenhouse gas emissions, supporting sustainable development and addressing the challenges posed by climate change.

DG Matrix

Seed Round in 2025
DG Matrix is a pioneering manufacturer specializing in energy storage and solar systems for electric vehicles (EVs). The company's innovative solutions focus on enabling widespread EV charging infrastructure, from single-unit L3 DC fast charging technology to microgrids and fleet charging, all while minimizing material usage and environmental footprint. This approach aims to facilitate gigaton-scale emissions reductions by making EV charging accessible and affordable.

MacroCycle Technologies

Seed Round in 2025
MacroCycle Technologies is a company developing a chemical recycling process to convert polyethylene terephthalate (PET) and polyester-fiber waste into virgin-grade plastics. Their proprietary technology, based on synthesizing cyclic macromolecules, enables the production of recycled PET with lower energy use than traditional methods. This process offers a sustainable, zero-carbon, and cost-competitive solution for plastic upcycling, contributing to a circular economy.

Transaera

Seed Round in 2024
Transaera specializes in the development of energy-efficient cooling systems aimed at minimizing energy consumption and greenhouse gas emissions. The company employs an innovative desiccant material that effectively removes moisture from the air prior to the cooling process, enhancing indoor comfort. Its solutions are designed for both residential and commercial applications, providing affordable and environmentally friendly cooling options that improve indoor climate control. By reducing the energy demands typically associated with conventional air conditioning units, Transaera's technologies support greater productivity while also alleviating strain on local grid infrastructure and contributing to a more sustainable global climate.

Peelon

Seed Round in 2024
Peelon offers biodegradable packaging solutions aimed at reducing food waste and plastic pollution in the fresh produce supply chain. By utilizing a proprietary blend of natural materials, Peelon creates a microclimate around fresh produce, effectively tripling its shelf life and maintaining its quality for extended periods. This innovation not only minimizes food waste but also decreases the frequency of transportation and storage, contributing to a reduced carbon footprint. Furthermore, Peelon's packaging is fully biodegradable and compostable, presenting an eco-friendly alternative to conventional packaging options.

Travertine

Venture Round in 2024
Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. The company employs a proprietary electrochemical process that transforms carbon dioxide from the atmosphere into stable carbonate minerals, effectively storing carbon permanently. In addition to carbon capture, this process generates sulfuric acid, which is utilized in critical element extraction and fertilizer production. By recycling sulfate waste to produce sulfuric acid and minimizing chemical waste, Travertine supports more sustainable practices in the mining and fertilizer industries while generating high-quality carbon credits through its direct air capture and mineralization efforts.

Carbon Upcycling

Series A in 2023
Carbon Upcycling is a carbon technology company focused on decarbonizing hard-to-abate industries. It utilizes patented technology to permanently store carbon dioxide in industrial byproducts and minerals, converting them into high-performance alternative materials for cement and concrete. This process not only reduces the carbon impact of industrial operations but also diverts materials from landfills, supporting the principles of a circular economy. Carbon Upcycling has garnered global recognition for its innovative approach, earning accolades such as the Carbon XPrize’s X-Factor award and being named one of the most investable cleantech ventures in Canada.

Nitrofix

Seed Round in 2023
NitroFix is focused on reducing the global carbon footprint by producing ammonia through a novel, emission-free manufacturing process. Utilizing an innovative electrochemical reaction facilitated by a new catalyst, the company achieves a production method that generates zero carbon dioxide. This sustainable ammonia production system not only offers a zero-carbon footprint solution but also promotes stable pricing and enables local ammonia production for various applications. NitroFix's green ammonia serves as a renewable energy source, a carrier for hydrogen fuel, and a foundational component for nitrogen fertilizers, contributing to a more sustainable future.

OxCCU

Series A in 2023
OxCCU specializes in renewable energy technology aimed at fostering a circular economy for fuels, chemicals, and plastics. The company’s innovative approach utilizes carbon dioxide extracted from the atmosphere, hydrogen sourced from water, and renewable electricity to produce sustainable fuels, chemicals, and biodegradable plastics. By doing so, OxCCU enables clients to adopt more environmentally friendly products, contributing to a more sustainable future.

GreenPortfolio

Angel Round in 2022
GreenPortfolio is a company focused on sustainable investing, offering tools that help users evaluate the climate impact of their financial assets and providers. Through its innovative rating system, the platform assesses financial products that contribute to climate solutions, providing users with insights into their effectiveness in addressing climate change. Additionally, GreenPortfolio utilizes AI to match users with financial advisors who specialize in sustainable investment strategies. This approach empowers consumers to manage their finances in a climate-friendly manner while aiming to achieve positive financial returns that align with their values.

Travertine

Seed Round in 2022
Travertine is a company focused on carbon dioxide removal and industrial chemical production, aiming to mitigate the environmental impact associated with the extraction of elements for renewable energy. The company employs a proprietary electrochemical process that transforms carbon dioxide from the atmosphere into stable carbonate minerals, effectively storing carbon permanently. In addition to carbon capture, this process generates sulfuric acid, which is utilized in critical element extraction and fertilizer production. By recycling sulfate waste to produce sulfuric acid and minimizing chemical waste, Travertine supports more sustainable practices in the mining and fertilizer industries while generating high-quality carbon credits through its direct air capture and mineralization efforts.

Carbon Upcycling

Venture Round in 2022
Carbon Upcycling is a carbon technology company focused on decarbonizing hard-to-abate industries. It utilizes patented technology to permanently store carbon dioxide in industrial byproducts and minerals, converting them into high-performance alternative materials for cement and concrete. This process not only reduces the carbon impact of industrial operations but also diverts materials from landfills, supporting the principles of a circular economy. Carbon Upcycling has garnered global recognition for its innovative approach, earning accolades such as the Carbon XPrize’s X-Factor award and being named one of the most investable cleantech ventures in Canada.

Pearl Certification

Series A in 2021
Pearl Certification, established in 2015 and headquartered in Vienna, Virginia, specializes in third-party certification of residential properties. The company assesses and documents homes' energy efficiency, comfort, indoor air quality, and safety features. By working with real estate agents, contractors, and builders, Pearl helps homeowners recoup investment costs and increases buyer confidence during property transactions. This promotes sustainable building practices, benefiting homeowners, the real estate market, and the environment.

Cleartrace

Series A in 2020
ClearTrace Technologies, Inc., established in 2017 and based in Austin, Texas, specializes in developing a blockchain-based carbon accounting and automated energy platform. The company's core product, ClearTrace, is a cloud-based SaaS platform that creates verifiable digital records of energy usage and tracks various energy-related activities, such as third-party energy supply, power purchase agreements, and demand response programs. ClearTrace serves renewable energy suppliers, corporations, and commercial real estate clients, providing reporting, auditing, and compliance services for energy supply chains. By leveraging blockchain technology, ClearTrace aims to enhance transparency, immutability, and trust in energy and carbon data, facilitating corporate decarbonization and preventing greenwashing.

Rebound Technologies

Series A in 2020
Rebound Technologies, Inc. specializes in the manufacturing and supply of advanced thermal energy storage systems tailored for commercial refrigeration and off-grid cooling applications. Founded in 2012 and based in Commerce City, Colorado, the company offers innovative products such as IcePoint, which integrates an embedded thermal energy storage system to significantly reduce cooling costs for supermarkets, and SunChill, designed for agricultural needs in developing regions. SunChill effectively converts solar thermal energy into refrigeration, enhancing agricultural productivity by rapidly cooling harvested crops and maintaining their quality at local markets. Rebound Technologies emphasizes customized solutions that utilize renewable resources and waste heat capture, aiming to improve energy efficiency and reduce costs while supporting self-sustaining business models. The company's initiatives are currently backed by research grants from the U.S. Federal Government.

Pearl Certification

Series A in 2019
Pearl Certification, established in 2015 and headquartered in Vienna, Virginia, specializes in third-party certification of residential properties. The company assesses and documents homes' energy efficiency, comfort, indoor air quality, and safety features. By working with real estate agents, contractors, and builders, Pearl helps homeowners recoup investment costs and increases buyer confidence during property transactions. This promotes sustainable building practices, benefiting homeowners, the real estate market, and the environment.

Rebound Technologies

Series A in 2019
Rebound Technologies, Inc. specializes in the manufacturing and supply of advanced thermal energy storage systems tailored for commercial refrigeration and off-grid cooling applications. Founded in 2012 and based in Commerce City, Colorado, the company offers innovative products such as IcePoint, which integrates an embedded thermal energy storage system to significantly reduce cooling costs for supermarkets, and SunChill, designed for agricultural needs in developing regions. SunChill effectively converts solar thermal energy into refrigeration, enhancing agricultural productivity by rapidly cooling harvested crops and maintaining their quality at local markets. Rebound Technologies emphasizes customized solutions that utilize renewable resources and waste heat capture, aiming to improve energy efficiency and reduce costs while supporting self-sustaining business models. The company's initiatives are currently backed by research grants from the U.S. Federal Government.

Pearl Certification

Series A in 2019
Pearl Certification, established in 2015 and headquartered in Vienna, Virginia, specializes in third-party certification of residential properties. The company assesses and documents homes' energy efficiency, comfort, indoor air quality, and safety features. By working with real estate agents, contractors, and builders, Pearl helps homeowners recoup investment costs and increases buyer confidence during property transactions. This promotes sustainable building practices, benefiting homeowners, the real estate market, and the environment.

CleanFiber

Venture Round in 2018
CleanFiber, LLC specializes in producing high-performance cellulose insulation materials made from recycled corrugated cardboard for residential and commercial construction. Founded in 2013 and based in Blasdell, New York, with an additional office in Buffalo, CleanFiber transitioned from its previous name, UltraCell Insulation, in September 2018. The company focuses on providing sustainable, carbon-negative insulation solutions that can be applied in attics, walls, and floors, catering to both new construction and retrofit projects. CleanFiber's products not only enhance fire resistance in buildings but also offer a cost-competitive alternative for construction companies, supporting environmentally friendly building practices. The company is currently expanding its production capabilities to meet growing demand.

CleanFiber

Venture Round in 2018
CleanFiber, LLC specializes in producing high-performance cellulose insulation materials made from recycled corrugated cardboard for residential and commercial construction. Founded in 2013 and based in Blasdell, New York, with an additional office in Buffalo, CleanFiber transitioned from its previous name, UltraCell Insulation, in September 2018. The company focuses on providing sustainable, carbon-negative insulation solutions that can be applied in attics, walls, and floors, catering to both new construction and retrofit projects. CleanFiber's products not only enhance fire resistance in buildings but also offer a cost-competitive alternative for construction companies, supporting environmentally friendly building practices. The company is currently expanding its production capabilities to meet growing demand.

WeSpire

Series A in 2014
WeSpire Inc. is an engagement platform based in Boston, Massachusetts, that specializes in sustainability and corporate responsibility programs for global corporations. Founded in 2010, the company, formerly known as Practically Green, LLC, empowers organizations to engage their employees in impactful initiatives through persuasive technology. WeSpire's platform incorporates dynamic content, social levers, and gamification, utilizing applied behavioral science to drive participation and measure outcomes across various areas, including energy, water, waste, transportation, food, volunteerism, and corporate citizenship. The company collaborates with prominent brands such as Unilever, MGM Resorts International, and Sony to foster engagement in sustainability and well-being programs, helping organizations achieve measurable positive impacts.

MyEnergy

Series A in 2011
MyEnergy operates as a personalized platform that assists households in the United States in reducing energy consumption and lowering utility bills. By accessing the free site, users can benefit from energy-saving tips, incentives, and the ability to compare their energy usage with others. The platform also enables users to set personal goals and monitor their progress, while offering rewards for successful reductions in energy bills. MyEnergy's technology incorporates advanced algorithms that analyze utility energy data, enhancing its ability to provide tailored recommendations. The service is compatible with numerous utilities nationwide and is expanding to reach over 90% of the U.S. population, making it a valuable resource for energy savings.

Next Step Living

Series B in 2010
Next Step Living provides home energy evaluations and solutions for individuals and organizations. It offers energy assessment and diagnostics, air sealing and insulation, and multi-family retrofit services. The company also provides customized solutions, such as HVAC repair and replacement, window replacement and installation, solar or geothermal systems installation, building automation, interior and exterior lighting design, and custom retrofit services. Its sustainability solutions include water efficiency and purification, landscape design and management, and indoor air quality services. The company provides assessment and diagnostic processes to heating and cooling, domestic hot water, and electricity and lighting needs. Next Step Living partners with more than 400 municipalities, civic organizations, contractors, and corporations to deliver energy-efficient and environmental-friendly solutions to its customers. Those solutions include home energy assessments, weatherization work, energy-efficient windows, efficient heating, and cooling solutions, and access to solar solutions. Next Step Living was founded in 2008 by Geoff Chapin and is based in Boston, Massachusetts.

eQuilibrium Solutions

Seed Round in 2007
socially responsible investing

Exterra Carbon Solutions

Exterra Carbon Solutions is a negative emissions technology company focused on developing effective methods for durable carbon dioxide storage through the use of mineral waste. The company has created a platform that accelerates the natural weathering of rocks, transforming mineral waste into substantial carbon sinks capable of permanently storing CO2. Exterra offers comprehensive solutions for industrial emitters and direct capture companies, facilitating verifiable storage of captured carbon through mineral carbonation. Additionally, the company enables the generation of trusted carbon credits in collaboration with standard bodies, while implementing robust accounting frameworks for various CO2 mineralization technologies worldwide.
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