Helping climatetech startupsTransformindustry faster
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Anzu Partners
Manufacturing & Processing
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
R3 Energy
Energy & Power
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Torres Orbital Mining Inc (TOM)
Infrastructure & Construction
Autonomous lunar excavation systems for dust-free regolith mining and space operations
WindRays Energy LLC
Energy & Power
WindRays Energy LLC — develops new models of wind energy designs to make widespread implementation in densely populated areas more efficient and profitable.
Energy Web Foundation
Energy & Power
Nfinite Nanotech
Manufacturing & Processing
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities
ALLY Energy
Infrastructure & Construction
ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.
Armeta
Armeta AI is the structured data layer for industrial facilities, turning legacy P&IDs into Material Take-Offs and EPA/OSHA regulatory inventories that power brownfield retrofits, LDAR programs, and energy transition projects across the installed base.
Tycho Solutions
Energy & Power
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
SWERV
Infrastructure & Construction
Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Planetary Hydrogen
Manufacturing & Processing
LNK Energies
Energy & Power
LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Anzu Partners
Manufacturing & Processing
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
R3 Energy
Energy & Power
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Torres Orbital Mining Inc (TOM)
Infrastructure & Construction
Autonomous lunar excavation systems for dust-free regolith mining and space operations
WindRays Energy LLC
Energy & Power
WindRays Energy LLC — develops new models of wind energy designs to make widespread implementation in densely populated areas more efficient and profitable.
Energy Web Foundation
Energy & Power
Nfinite Nanotech
Manufacturing & Processing
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities
ALLY Energy
Infrastructure & Construction
ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.
Armeta
Armeta AI is the structured data layer for industrial facilities, turning legacy P&IDs into Material Take-Offs and EPA/OSHA regulatory inventories that power brownfield retrofits, LDAR programs, and energy transition projects across the installed base.
Tycho Solutions
Energy & Power
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
SWERV
Infrastructure & Construction
Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Planetary Hydrogen
Manufacturing & Processing
LNK Energies
Energy & Power
LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.
Sofar Ocean
Food, Water, & Land
Ranger Solar
Energy & Power
Ebb Carbon
Food, Water, & Land
Ebb Carbon — removes atmospheric CO2 and reduces ocean acidification. Using a proprietary electrochemical system to separate acid out of salty water, Ebb de-acidifies the ocean and enhances its natural ability to capture CO2 from the air and store it safely and stably as bicarbonate for at least 10,000 years.
Freshr Technologies
Food, Water, & Land
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
WattGlass
Energy & Power
MissionPoint Capital Partners
REI
Energy & Power
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
Voltaware
Energy & Power
Voltaware is an AI-powered energy intelligence company that helps utilities, energy innovators, and service providers unlock the full potential of energy data to drive energy efficiency and decarbonization.
Revterra
Energy & Power
Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging
DxLab
Food, Water, & Land
DxLab — consists of engineers, physicists, biologists, and chemists working together to provide rapid and affordable detection of diseases with new diagnostic platforms that can be used where they are needed the most. By providing means for easy and accurate disease detection, they aim to make diagnostic testing available to anyone who wants or needs it.
Aelun
Salient Energy
Energy & Power
Littoral Power Systems
Energy & Power
LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.
REON Technology
Energy & Power
AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
CarbonQuest
Infrastructure & Construction
Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies
Liquid-Charge
Energy & Power
Liquid-Charge — will manufacture mobile Solid Oxide Fuel Cell (SOFC) range extenders for battery electric vehicles, using them to trickle-charge batteries while effortlessly retaining CO2 for sequestration and recycling.
Sofar Ocean
Food, Water, & Land
Ranger Solar
Energy & Power
Ebb Carbon
Food, Water, & Land
Ebb Carbon — removes atmospheric CO2 and reduces ocean acidification. Using a proprietary electrochemical system to separate acid out of salty water, Ebb de-acidifies the ocean and enhances its natural ability to capture CO2 from the air and store it safely and stably as bicarbonate for at least 10,000 years.
Freshr Technologies
Food, Water, & Land
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
WattGlass
Energy & Power
MissionPoint Capital Partners
REI
Energy & Power
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
Voltaware
Energy & Power
Voltaware is an AI-powered energy intelligence company that helps utilities, energy innovators, and service providers unlock the full potential of energy data to drive energy efficiency and decarbonization.
Revterra
Energy & Power
Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging
DxLab
Food, Water, & Land
DxLab — consists of engineers, physicists, biologists, and chemists working together to provide rapid and affordable detection of diseases with new diagnostic platforms that can be used where they are needed the most. By providing means for easy and accurate disease detection, they aim to make diagnostic testing available to anyone who wants or needs it.
Aelun
Salient Energy
Energy & Power
Littoral Power Systems
Energy & Power
LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.
REON Technology
Energy & Power
AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
CarbonQuest
Infrastructure & Construction
Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies
Liquid-Charge
Energy & Power
Liquid-Charge — will manufacture mobile Solid Oxide Fuel Cell (SOFC) range extenders for battery electric vehicles, using them to trickle-charge batteries while effortlessly retaining CO2 for sequestration and recycling.
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
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Startups Operate
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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.
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Tap into deal flow with the world’s largest community of climate and energy startups.