Helping climatetech startupsTransformindustry faster
Salient Energy
Energy & Power
Cellen
Transportation & Logistics
Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions
Newfound Materials
Manufacturing & Processing
The synthesis design layer for making new materials.
Enerbrain
Infrastructure & Construction
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
EcoForge
Food, Water, & Land
-- is a building material technology company developing affordable, high-performance building materials from local agricultural residues, replacing energy-intensive, fossil-based materials. This sustainable approach increases resilience to climate and supply chain risks, supports local farming, and job creation. Moreover, EcoForge’s toxic chemical-free material recipe promotes healthier indoor environments.
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
MITO Material Solutions
Manufacturing & Processing
SICDrone
Transportation & Logistics
SWTCH Energy Inc.
Transportation & Logistics
Spare-it
Manufacturing & Processing
Spare-it — is a catalyst for sustainability in the workplace.
Raise Green
Energy & Power
Raise Green — helps make it easy to start your own solar energy project or climate action company. Anyone can start a project on Raise Green and bring clean energy to their business or community.
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
RepAir Carbon
Manufacturing & Processing
RepAir - the most efficient, scalable and affordable carbon capture solution, designed for the gigaton scale
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
REI
Energy & Power
CemCycle
Manufacturing & Processing
Ohmium International
Energy & Power
Excipio Energy
Energy & Power
Excipio Energy — is an offshore renewable energy company integrating wind, wave, currents, OTEC, and power-to-fuel in a single floating platform.
Salient Energy
Energy & Power
Cellen
Transportation & Logistics
Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions
Newfound Materials
Manufacturing & Processing
The synthesis design layer for making new materials.
Enerbrain
Infrastructure & Construction
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
EcoForge
Food, Water, & Land
-- is a building material technology company developing affordable, high-performance building materials from local agricultural residues, replacing energy-intensive, fossil-based materials. This sustainable approach increases resilience to climate and supply chain risks, supports local farming, and job creation. Moreover, EcoForge’s toxic chemical-free material recipe promotes healthier indoor environments.
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
MITO Material Solutions
Manufacturing & Processing
SICDrone
Transportation & Logistics
SWTCH Energy Inc.
Transportation & Logistics
Spare-it
Manufacturing & Processing
Spare-it — is a catalyst for sustainability in the workplace.
Raise Green
Energy & Power
Raise Green — helps make it easy to start your own solar energy project or climate action company. Anyone can start a project on Raise Green and bring clean energy to their business or community.
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
RepAir Carbon
Manufacturing & Processing
RepAir - the most efficient, scalable and affordable carbon capture solution, designed for the gigaton scale
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
REI
Energy & Power
CemCycle
Manufacturing & Processing
Ohmium International
Energy & Power
Excipio Energy
Energy & Power
Excipio Energy — is an offshore renewable energy company integrating wind, wave, currents, OTEC, and power-to-fuel in a single floating platform.
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Advent Technologies
Energy & Power
Advent Technologies — makes ht-pem fuel cells that convert hydrogen and other renewable fuels to electricity. This platform technology that addresses needs in numerous markets, including passenger, commercial vehicle, and lightweight aviation (eVTOL).
AIRCO
Energy & Power
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
AquaNRG
Energy & Power
AquaNRG is provider of advanced technologies for subsurface energy and environmental applications. AquaNRG's technology has been funded through $1.4M grants by the US Department of Energy and National Science Foundation.
CarbonBlue
Food, Water, & Land
Pressure Core
Manufacturing & Processing
Pressure Core — is a development company focused on transforming industrial waste pressure into emission-free power. The company simplifies project development for host facilities by offering to buy their waste stream instead of selling them a project.
Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
Capture6
Manufacturing & Processing
Capture6 — removes carbon from the atmosphere while producing clean water and other industrial products from seawater or other saltwater inputs.
SteamIQ
Manufacturing & Processing
SWERV
Infrastructure & Construction
Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation
Hertha Metals Inc.
Energy & Power
Green Path Strategies
Energy & Power
Resonant Energy
Energy & Power
Apitronics
Food, Water, & Land
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
ALGBIO
Manufacturing & Processing
ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.
Solomon Group
Energy & Power
Solomon Group LLC — delivers solutions for engaging diverse communities, whether urban or rural, with workforce development, language access planning and energy efficiency infrastructure solutions in order to drive understanding and adoption of clean energy and energy-efficiency benefits and opportunities available to the general public.
Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Advent Technologies
Energy & Power
Advent Technologies — makes ht-pem fuel cells that convert hydrogen and other renewable fuels to electricity. This platform technology that addresses needs in numerous markets, including passenger, commercial vehicle, and lightweight aviation (eVTOL).
AIRCO
Energy & Power
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
AquaNRG
Energy & Power
AquaNRG is provider of advanced technologies for subsurface energy and environmental applications. AquaNRG's technology has been funded through $1.4M grants by the US Department of Energy and National Science Foundation.
CarbonBlue
Food, Water, & Land
Pressure Core
Manufacturing & Processing
Pressure Core — is a development company focused on transforming industrial waste pressure into emission-free power. The company simplifies project development for host facilities by offering to buy their waste stream instead of selling them a project.
Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
Capture6
Manufacturing & Processing
Capture6 — removes carbon from the atmosphere while producing clean water and other industrial products from seawater or other saltwater inputs.
SteamIQ
Manufacturing & Processing
SWERV
Infrastructure & Construction
Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation
Hertha Metals Inc.
Energy & Power
Green Path Strategies
Energy & Power
Resonant Energy
Energy & Power
Apitronics
Food, Water, & Land
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
ALGBIO
Manufacturing & Processing
ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.
Solomon Group
Energy & Power
Solomon Group LLC — delivers solutions for engaging diverse communities, whether urban or rural, with workforce development, language access planning and energy efficiency infrastructure solutions in order to drive understanding and adoption of clean energy and energy-efficiency benefits and opportunities available to the general public.
Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems
The way the world makes energy, materials, and food is changing — and the next decade will decide whether that change makes life better: more energy with fewer emissions, more industry with cleaner air, more good jobs.
That future comes from entrepreneurs — the heroes who turn ideas into real products, real companies, and the jobs of the future. And the ones who make it are the ones with a community behind them.
For 15 years, Greentown has been that community — leaning in with the space, the people, the funding, and the first customers they need. Get behind the entrepreneurs building our future.
Our Startups Have Raised Over $0B
All-time
0
Currently home to
0
0+
Countries Where
Startups Operate
0
New Jobs Created by Our Members, and Counting
Startups bring the breakthroughs. Corporate partners bring the scale, infrastructure, expertise, and capital to make them matter.
Ready to take your technology to the next level? Join the world's largest community of climatetech and energy entrepreneurs and fast-track your speed to market.
Become a Partner
Access the most concentrated pipeline of vetted climatetech companies in North America. Partner on pilots, invest, or join as a corporate sponsor.
Get Involved
We pride ourselves on being a convener of the climatetech ecosystem. Join us at an upcoming event to explore all things climate action and collaboration.
Explore Investing
Tap into deal flow with the world’s largest community of climate and energy startups.