The Harvard Innovation Labs has selected 38 ventures to join the fifth annual Harvard Climate Entrepreneurs Circle, a year-long accelerator program for high-potential ventures working to address climate change. These ventures focus on a wide range of initiatives globally in clean energy, commercial fleet optimization, chemical manufacturing decarbonization, climate education, sustainable agriculture, and more.
“Each year, the number of Harvard students and alumni using market forces to tackle climate challenges continues to grow exponentially,” said Rebekah Emanuel, senior advisor for climate and social impact at the Harvard Innovation Labs, and chair of the Harvard Climate Entrepreneurs Circle. “The Climate Circle strives to support as many of these extraordinary climate founders as possible. This year, we’re increasing our cohort size by more than 20%, bringing together a group of ventures that are working on everything from powering hospital oxygen machines using solar across Africa, to building infrastructure for a new global carbon market, to reshaping solar panels so they are no longer flat rigid blocks. I can’t wait to work with them all, and see their work have a positive impact on our communities.”
The Climate Entrepreneurs Circle offers world-class coaching, legal counsel, warm connections to industry leaders, and a peer group of Harvard founders who are all working on innovative solutions to tackle climate change. Additionally, ventures get exclusive access to a “first customer program” with Harvard Operations, which gives them the opportunity to pitch their solutions to University operations. Harvard University has initiated procurement with multiple ventures after hearing founders pitch, aiming to turn the university campus into a living laboratory for novel climate solutions. The Climate Circle is spearheaded by the Harvard Innovation Labs, Harvard Business School’s Business and Environment Initiative, and Harvard Alumni for Climate and the Environment.
Since introducing the Climate Entrepreneurs Circle in 2021, the program has supported more than 130 ventures in developing innovative climate solutions. Participants have gone on to take their companies public, form partnerships with governments around the world, receive prestigious recognition such as being named on the Top 100 Climate Leaders list, and collectively scale their ventures to impact the lives of millions. Approximately three quarters of this year’s Climate Entrepreneurs Circle ventures are led by women or people of color.
Members of the 2025 Harvard Entrepreneurs Climate Circle include:
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A1 Power Technologies
Powering Nigeria’s food systems with clean energy across farming, processing, and distribution — improving food security while reducing the environmental footprint of agriculture.
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Active Surfaces, Inc.
Developing a patented, lightweight, flexible solar technology that accelerates adoption in the built environment and rapidly mitigates carbon dioxide emissions at a global scale.
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Adiabatic Materials
Building a novel chemical manufacturing platform to decarbonize the chemical industry by replacing heat obtained from fossil fuels with electricity.
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Applied Impact
Building software for communities, regulators, and developers to forecast air pollution and water impact of energy-intensive sites connected via the grid or on-site power sources.
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Atterriss LLC
Building the infrastructure for a global, high-integrity carbon market — partnering with stock exchanges and regulators to enhance trust and unlock capital flows.
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Authentica AI
Using AI and blockchain to trace rare earth element sourcing, ensuring compliance for manufacturers, labs, and governments needing to verify the climate impact and origin of rare earth materials.
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Birufinery
Creating seaweed-based biostimulants for sustainable agriculture that remediate soil, boost yields, and improve fertilizer efficiency.
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CarbonTag
Offering a SaaS solution for food and beverage companies to manage their products' carbon footprints.
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CliMent
For mothers in underserved, climate-vulnerable communities facing silent mental health risks, we provide EMRI—an offline, AI-powered tool that detects distress early without stigma or internet.
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EmpoderaClima
A youth-led organization from Brazil empowering women and girls to lead climate action across Latin America through education, leadership training, and global advocacy.
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Energenesis, Inc.
Providing an AI-powered agrivoltaic system that co-produces clean energy and crops, enhancing revenue and sustainability.
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EQORE
Providing intelligent battery systems that help commercial and industrial facilities cut electricity costs without changing operations.
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Gridbrid
Helping companies simplify the process, maximize the profits, and reduce the risks of developing renewable energy power plants.
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Gridify
Building software for clean energy markets with the mission to increase transparency for environmental commodity transactions.
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H2BIOSYS
Transforming planet-heating methane into clean and sustainable materials, animal feed, and hydrogen.
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HBTBL
A platform that streamlines pre-development and aligns key players early around real estate projects that benefit people and cities, making high-impact projects happen in the right places.
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HyCO Tech Solutions
Delivering clean hydrogen and high-quality carbon products with reduced water use and a smaller CO₂ footprint.
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HydroHaul
Developing an energy-efficient mechanism for liberating hydrogen from liquid organic hydrogen carriers, enabling a safe and easy-to-use technology for moving and storing hydrogen.
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Jexim
Delivering sustainable, high-performance asphalt technologies to markets worldwide.
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Kykloris
Developing a unique and environmentally friendly method to extract valuable chemicals from seafood waste.
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LymeAlert
Building the world's first home/field testing kit for Lyme and other tick-borne diseases, paired with an app that maps the locations of various tick species and the diseases they carry.
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Mireta Urban Dynamics
Building biology-inspired AI tools to help developers plan more climate-resilient city networks.
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Nixe
Developing a water repellent coating for soft materials that is robust, flexible, breathable, and PFA-free.
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Noetis
Creating a next-gen data layer for waste operations using smart, AI-powered sensors and analytics to transform methane emissions into energy revenue, while driving organic waste diversion and streamlining environmental compliance.
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OmniPath H2
Developing an industrial decarbonization platform. The company's novel reactor can extract hydrogen from any gas streams, reducing costs for production, transportation, and recycling of hydrogen across many industrial sectors.
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Orien Energy
Developing an adsorption heat pump to recover the heat embedded in humidity, maximizing heat pump efficiency.
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PowerNaP Energy
Developing advanced materials to make sodium-ion batteries as efficient as commonly-used lithium-ion batteries, but at half the cost.
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Private Fleet Net Zero
Matching more than $50 billion worth of demand for shipping products to unused cargo space in private truck fleets, which has the potential to save two million tons of carbon dioxide.
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Resilience Investments
Revitalizing housing in America’s heartland by turning overlooked properties into profitable, energy-efficient assets that strengthen communities and deliver solid returns.
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ReThink Packaging Alliance
A consumer product packaging solutions alliance working with CPG brands, retailers, social Influencers, and everyday consumers to reduce packaging waste and make packaging more environmentally friendly.
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Rice Husk Insulation System
Creating a low-cost, readily-available, bio-based insulation for buildings using rice husk — an agricultural waste.
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SkillSeek
Creating accessible and effective training bootcamps to equip individuals with the right skills to enter and build a career in the clean energy industry.
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Skiply
Applying AI-powered solutions to authenticate, score, and automatically route retail returns into circular resale, donation, or refurbishment — turning what was once landfill-bound into climate-positive assets.
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SolarSync
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Sunspan
Commercializing solar panels that incorporate aerodynamic photovoltaic tubes, simplifying support structures and lowering installation costs.
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TARC.Co: The Autonomous Rail Car Company
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Vertical Horizons
Commercializing advanced power semiconductor technology for AI data centers — driving a 30% improvement in efficiency and 50% reduction in carbon footprint.
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Winko Solar
Delivering solar-powered oxygen to hospitals in Africa, with plans to expand globally.