Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
KP Labs logo

KP Labs

Manufacturing & Processing

Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues

Anzu Partners logo

Anzu Partners

Manufacturing & Processing

Ensovi logo

Ensovi

Manufacturing & Processing

Cofactor recycling platform for sustainable drug manufacturing

R3 Energy logo

R3 Energy

Energy & Power

Tato Labs logo

Tato Labs

Manufacturing & Processing

Bioplastic products and packaging solutions made from potato starch

Torres Orbital Mining Inc (TOM) logo

Torres Orbital Mining Inc (TOM)

Infrastructure & Construction

Autonomous lunar excavation systems for dust-free regolith mining and space operations

WindRays Energy LLC logo

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 logo

Energy Web Foundation

Energy & Power

Nfinite Nanotech logo

Nfinite Nanotech

Manufacturing & Processing

Clean Crop Technologies logo

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 logo

change:WATER Labs

Food, Water, & Land

Low-cost, compact, waterless toilet for non-sewered households and communities

ALLY Energy logo

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 logo

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 logo

Tycho Solutions

Energy & Power

Florrent logo

Florrent

Food, Water, & Land

High-energy-density supercapacitors for energy storage, made from domestic biomass waste

Allkemie logo

Allkemie

Manufacturing & Processing

Producing tailored graphene and other nanomaterials at scale

SWERV logo

SWERV

Infrastructure & Construction

Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation

Catalyxx logo

Catalyxx

Manufacturing & Processing

Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

LNK Energies logo

LNK Energies

Energy & Power

LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.

KP Labs logo

KP Labs

Manufacturing & Processing

Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues

Anzu Partners logo

Anzu Partners

Manufacturing & Processing

Ensovi logo

Ensovi

Manufacturing & Processing

Cofactor recycling platform for sustainable drug manufacturing

R3 Energy logo

R3 Energy

Energy & Power

Tato Labs logo

Tato Labs

Manufacturing & Processing

Bioplastic products and packaging solutions made from potato starch

Torres Orbital Mining Inc (TOM) logo

Torres Orbital Mining Inc (TOM)

Infrastructure & Construction

Autonomous lunar excavation systems for dust-free regolith mining and space operations

WindRays Energy LLC logo

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 logo

Energy Web Foundation

Energy & Power

Nfinite Nanotech logo

Nfinite Nanotech

Manufacturing & Processing

Clean Crop Technologies logo

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 logo

change:WATER Labs

Food, Water, & Land

Low-cost, compact, waterless toilet for non-sewered households and communities

ALLY Energy logo

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 logo

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 logo

Tycho Solutions

Energy & Power

Florrent logo

Florrent

Food, Water, & Land

High-energy-density supercapacitors for energy storage, made from domestic biomass waste

Allkemie logo

Allkemie

Manufacturing & Processing

Producing tailored graphene and other nanomaterials at scale

SWERV logo

SWERV

Infrastructure & Construction

Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation

Catalyxx logo

Catalyxx

Manufacturing & Processing

Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

LNK Energies logo

LNK Energies

Energy & Power

LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.

Sofar Ocean logo

Sofar Ocean

Food, Water, & Land

Ranger Solar logo

Ranger Solar

Energy & Power

Ebb Carbon logo

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 logo

Freshr Technologies

Food, Water, & Land

Verde Technologies logo

Verde Technologies

Energy & Power

Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption

WattGlass logo

WattGlass

Energy & Power

MissionPoint Capital Partners logo

MissionPoint Capital Partners

REI logo

REI

Energy & Power

XTPL logo

XTPL

Manufacturing & Processing

Additive manufacturing technology for ultra-precise printing of nanomaterials

Voltaware logo

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 logo

Revterra

Energy & Power

Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging

DxLab logo

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 logo

Aelun

Salient Energy logo

Salient Energy

Energy & Power

Littoral Power Systems logo

Littoral Power Systems

Energy & Power

LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.

REON Technology logo

REON Technology

Energy & Power

AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage

Phase Two Chemicals logo

Phase Two Chemicals

Manufacturing & Processing

Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage

CarbonQuest logo

CarbonQuest

Infrastructure & Construction

Kausalyze logo

Kausalyze

Manufacturing & Processing

True root-cause analysis for chemicals, energy, and pharmaceutical companies

Liquid-Charge logo

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 logo

Sofar Ocean

Food, Water, & Land

Ranger Solar logo

Ranger Solar

Energy & Power

Ebb Carbon logo

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 logo

Freshr Technologies

Food, Water, & Land

Verde Technologies logo

Verde Technologies

Energy & Power

Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption

WattGlass logo

WattGlass

Energy & Power

MissionPoint Capital Partners logo

MissionPoint Capital Partners

REI logo

REI

Energy & Power

XTPL logo

XTPL

Manufacturing & Processing

Additive manufacturing technology for ultra-precise printing of nanomaterials

Voltaware logo

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 logo

Revterra

Energy & Power

Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging

DxLab logo

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 logo

Aelun

Salient Energy logo

Salient Energy

Energy & Power

Littoral Power Systems logo

Littoral Power Systems

Energy & Power

LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.

REON Technology logo

REON Technology

Energy & Power

AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage

Phase Two Chemicals logo

Phase Two Chemicals

Manufacturing & Processing

Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage

CarbonQuest logo

CarbonQuest

Infrastructure & Construction

Kausalyze logo

Kausalyze

Manufacturing & Processing

True root-cause analysis for chemicals, energy, and pharmaceutical companies

Liquid-Charge logo

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.

Greentown member working in a wet lab
Greentown community members collaborating
Greentown member pipetting in a lab
Greentown members at work in the incubator
[ 03 ]Who We Are

Greentown is a 501(c)(3) nonprofit helping climate entrepreneurs build faster.

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.

[ 04 ]By The Numbers

Our Impact

Our members aren't just building better ways to operate; they're slashing emissions, boosting efficiency, and transforming how we use resources across the world. Now 15 years and counting, the impact speaks for itself.
Capital Mobilized

Our Startups Have Raised Over $0B

2011Now
Startups Supported

All-time

0

Currently home to

0

Global Footprint

0+

Countries Where
Startups Operate

Jobs Created

0

New Jobs Created by Our Members, and Counting

[ 05 ]Our Partners

Where Industry Meets Innovation

Startups bring the breakthroughs. Corporate partners bring the scale, infrastructure, expertise, and capital to make them matter.

  • Amazon
  • Amrize
  • Aramco
  • BCG
  • Chevron
  • Dassault Systemes
  • Emerson
  • Enel
  • Equinor
  • Foley Hoag
  • Fortescue
  • GeSI
  • GE Vernova
  • OnTerris (fka Montrose)
  • Saint-Gobain
  • Shell
  • TotalEnergies
  • Vinson & Elkins
  • Woodside Energy
For Startups

Apply for Membership

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.

Greentown member prototyping hardware in the lab
For Partners
Greentown partners networking at an event

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.

Explore Partnership
Events
Speaker presenting on stage at a Greentown event

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.

View Calendar
For Investors
Founders and investors connecting at a Greentown incubator

Explore Investing

Tap into deal flow with the world’s largest community of climate and energy startups.

Explore Investing