Helping climatetech startupsTransformindustry faster
Universal Matter Inc.
Manufacturing & Processing
Producing graphene from carbon waste streams
Tycho Solutions
Energy & Power
QD Solar
Energy & Power
SolarFi
Energy & Power
Privé is a unique and blissful experience for social-distanced gathering in a transparent house that combines the arts, renewable energy, and sustainability.
Fysikes Biosolutions
Energy & Power
Fysikes Biosolutions — develops renewable green fuels (methanol, ammonia, and naphtas) via the production of hydrogen and concentrated CO2 from direct air capture and industrial CO2 capture technologies.
SteamIQ
Manufacturing & Processing
Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint
CGIS
Energy & Power
Fervo Energy
Energy & Power
Fervo Energy — is a next-generation geothermal power developer, delivering 24/7 carbon-free energy.
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Public Grid
Energy & Power
ETAK
ETAK transforms waste into clean energy. Our modular technology converts unsorted municipal and industrial waste into high-calorific gas, offering a decentralized, 24/7 alternative to fossil fuels and traditional incineration.
Axis Sky Renewables
Energy & Power
-- creates innovative wind solutions, specializing in vertical axis wind turbines. Its cutting-edge technology is less expensive than traditional wind turbines to produce, deploy and maintain while still producing reliable renewable energy.
BlueTec Energy
Energy & Power
Raptor Maps
Energy & Power
AI software to increase solar farm power production, reduce operational risk, and lower costs
GreenChoice
Food, Water, & Land
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Lobster Robotics
Food, Water, & Land
Lobster Robotics — develops lightweight, low-cost, fast robots for visual surveying to lower the cost of surveying in offshore wind farms.
Universal Matter Inc.
Manufacturing & Processing
Producing graphene from carbon waste streams
Tycho Solutions
Energy & Power
QD Solar
Energy & Power
SolarFi
Energy & Power
Privé is a unique and blissful experience for social-distanced gathering in a transparent house that combines the arts, renewable energy, and sustainability.
Fysikes Biosolutions
Energy & Power
Fysikes Biosolutions — develops renewable green fuels (methanol, ammonia, and naphtas) via the production of hydrogen and concentrated CO2 from direct air capture and industrial CO2 capture technologies.
SteamIQ
Manufacturing & Processing
Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint
CGIS
Energy & Power
Fervo Energy
Energy & Power
Fervo Energy — is a next-generation geothermal power developer, delivering 24/7 carbon-free energy.
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Public Grid
Energy & Power
ETAK
ETAK transforms waste into clean energy. Our modular technology converts unsorted municipal and industrial waste into high-calorific gas, offering a decentralized, 24/7 alternative to fossil fuels and traditional incineration.
Axis Sky Renewables
Energy & Power
-- creates innovative wind solutions, specializing in vertical axis wind turbines. Its cutting-edge technology is less expensive than traditional wind turbines to produce, deploy and maintain while still producing reliable renewable energy.
BlueTec Energy
Energy & Power
Raptor Maps
Energy & Power
AI software to increase solar farm power production, reduce operational risk, and lower costs
GreenChoice
Food, Water, & Land
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Lobster Robotics
Food, Water, & Land
Lobster Robotics — develops lightweight, low-cost, fast robots for visual surveying to lower the cost of surveying in offshore wind farms.
Acelerex
Energy & Power
Acelerex — is a pioneer in providing SaaS-based solutions to the challenges of integrating renewables, energy storage and electric vehicles into the 21st century power grid.
KUBO Greenhouse Projects
Food, Water, & Land
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems
Micronic Technologies
Food, Water, & Land
Micronic Technologies — is a women co-founded and led, clean-tech company that is transforming industrial wastewater into high-value resources.
sweetgreen
Food, Water, & Land
REI
Energy & Power
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Giner Labs
Energy & Power
At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.
Verne
Energy & Power
Verne — develops hydrogen storage systems for zero-emission heavy-duty trucks.
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Malta
Energy & Power
MITO Material Solutions
Manufacturing & Processing
Energy Dome
Energy & Power
EnergyDome — has ideated and patented a revolutionary technology for large-scale and long-duration energy storage: The CO2 Battery.
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
Anzu Partners
Manufacturing & Processing
FibreCoat
Transportation & Logistics
Acelerex
Energy & Power
Acelerex — is a pioneer in providing SaaS-based solutions to the challenges of integrating renewables, energy storage and electric vehicles into the 21st century power grid.
KUBO Greenhouse Projects
Food, Water, & Land
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems
Micronic Technologies
Food, Water, & Land
Micronic Technologies — is a women co-founded and led, clean-tech company that is transforming industrial wastewater into high-value resources.
sweetgreen
Food, Water, & Land
REI
Energy & Power
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Giner Labs
Energy & Power
At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.
Verne
Energy & Power
Verne — develops hydrogen storage systems for zero-emission heavy-duty trucks.
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Malta
Energy & Power
MITO Material Solutions
Manufacturing & Processing
Energy Dome
Energy & Power
EnergyDome — has ideated and patented a revolutionary technology for large-scale and long-duration energy storage: The CO2 Battery.
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
Anzu Partners
Manufacturing & Processing
FibreCoat
Transportation & Logistics
The way the world makes energy, materials, and food is being reinvented right now. What happens over the next decade will decide how much better it gets: more energy with fewer emissions, more industry with cleaner air, more good jobs for people who need them, and more resiliency for communities everywhere.
That future is being built by entrepreneurs—the heroes who turn ideas into real products, real companies, and jobs of the future.
And we know they go further and faster when they're not doing it alone.
For 15 years, Greentown has a home for these founders, leaning in with the space, the people, the connections, and the first customers they need.
Ready to join us?
Our Startups Have Raised Over $0B
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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.