Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Emrod logo

Emrod

Energy & Power

Sustainable power with long-range wireless power transfer technology

Newfound Materials logo

Newfound Materials

Manufacturing & Processing

The synthesis design layer for making new materials.

PV Nano Cell logo

PV Nano Cell

Energy & Power

Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells

American Battery Technology Company logo

American Battery Technology Company

Energy & Power

Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company

Footprint logo

Footprint

Heila Technologies logo

Heila Technologies

Energy & Power

Heila Technologies — has developed the next generation of optimization and aggregation technologies for DERs to help accelerate the adoption of clean energy.

CERT Systems logo

CERT Systems

Manufacturing & Processing

enaDyne logo

enaDyne

Manufacturing & Processing

enaDyne — develops non-thermal plasma catalysis reactors to convert CO2 into chemicals and fuels.

LA NPDT logo

LA NPDT

Quantum New Energy logo

Quantum New Energy

Infrastructure & Construction

Quantum New Energy’s platform, EnerWisely, is a science-based solution that integrates IoT with data analytics and behavioral science. Quantum New Energy helps users transform their unused energy consumption data into personalized, actionable insights to maximize their monetary savings and reduce their environmental impacts.

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

REI logo

REI

Energy & Power

Phoenix Tailings logo

Phoenix Tailings

Manufacturing & Processing

Waste-free, net-zero, cost-competitive rare-earth-metal refining

Sweetch Energy logo

Sweetch Energy

Energy & Power

Membrane-based technology that taps into osmotic power

eSki Watercraft logo

eSki Watercraft

Energy & Power

Electric personal watercraft

Candid Intelligence logo

Candid Intelligence

Infrastructure & Construction

Accelerating pre-construction engineering with Agentic AI

AquaNRG logo

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.

Florrent logo

Florrent

Food, Water, & Land

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

frakktal logo

frakktal

Manufacturing & Processing

Biobased polymer process to upend PVC overuse

Adiabatic Materials logo

Adiabatic Materials

Manufacturing & Processing

Unlocking clean, affordable chemical production with electricity

Emrod logo

Emrod

Energy & Power

Sustainable power with long-range wireless power transfer technology

Newfound Materials logo

Newfound Materials

Manufacturing & Processing

The synthesis design layer for making new materials.

PV Nano Cell logo

PV Nano Cell

Energy & Power

Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells

American Battery Technology Company logo

American Battery Technology Company

Energy & Power

Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company

Footprint logo

Footprint

Heila Technologies logo

Heila Technologies

Energy & Power

Heila Technologies — has developed the next generation of optimization and aggregation technologies for DERs to help accelerate the adoption of clean energy.

CERT Systems logo

CERT Systems

Manufacturing & Processing

enaDyne logo

enaDyne

Manufacturing & Processing

enaDyne — develops non-thermal plasma catalysis reactors to convert CO2 into chemicals and fuels.

LA NPDT logo

LA NPDT

Quantum New Energy logo

Quantum New Energy

Infrastructure & Construction

Quantum New Energy’s platform, EnerWisely, is a science-based solution that integrates IoT with data analytics and behavioral science. Quantum New Energy helps users transform their unused energy consumption data into personalized, actionable insights to maximize their monetary savings and reduce their environmental impacts.

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

REI logo

REI

Energy & Power

Phoenix Tailings logo

Phoenix Tailings

Manufacturing & Processing

Waste-free, net-zero, cost-competitive rare-earth-metal refining

Sweetch Energy logo

Sweetch Energy

Energy & Power

Membrane-based technology that taps into osmotic power

eSki Watercraft logo

eSki Watercraft

Energy & Power

Electric personal watercraft

Candid Intelligence logo

Candid Intelligence

Infrastructure & Construction

Accelerating pre-construction engineering with Agentic AI

AquaNRG logo

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.

Florrent logo

Florrent

Food, Water, & Land

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

frakktal logo

frakktal

Manufacturing & Processing

Biobased polymer process to upend PVC overuse

Adiabatic Materials logo

Adiabatic Materials

Manufacturing & Processing

Unlocking clean, affordable chemical production with electricity

SRECTrade logo

SRECTrade

Energy & Power

Management and transaction platform for environmental commodities to reduce costs and increase transparency

Sunwealth logo

Sunwealth

Energy & Power

PolyJoule logo

PolyJoule

Energy & Power

PolyJoule — develops low-cost, high-power energy storage designed to strengthen the power grid.

Reverse Energy Solutions logo

Reverse Energy Solutions

Transportation & Logistics

Our startup implements innovative mobile solutions for solar panel recycling, drastically reducing logistic costs by 90% through streamlined collection and transportation processes.

ZwitterCo logo

ZwitterCo

Food, Water, & Land

Nanofiltration membranes for wastewater treatment with unprecedented fouling-resistance and size-selectivity.

Infinite Cooling logo

Infinite Cooling

Infrastructure & Construction

Infinite Cooling — reduces water consumption in industrial plants by capturing cooling tower plumes. The company has a patent-pending technology developed at MIT that uses electric fields to capture water from the plumes leaving cooling towers.

Verde Technologies logo

Verde Technologies

Energy & Power

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

Enersion logo

Enersion

Energy & Power

Mantel logo

Mantel

Manufacturing & Processing

Mantel — is developing the most thermally efficient and lowest cost carbon capture technology - helping the world reduce atmospheric CO2 levels.

Agrilab Technologies Inc. logo

Agrilab Technologies Inc.

Food, Water, & Land

Modular compost-aeration and heat-recovery systems

Pressure Core logo

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.

Keystone Tower Systems logo

Keystone Tower Systems

Energy & Power

De-Ice logo

De-Ice

Transportation & Logistics

Electric de-icing technology designed to help the aerospace industry eliminate all chemicals

Verdox Inc logo

Verdox Inc

Manufacturing & Processing

Verdox — is making scalable, cost-effective carbon capture and removal a reality. Founded in late 2019 by Dr. Brian Baynes, Prof. T. Alan Hatton, and Dr. Sahag Voskian, the company is commercializing its electroswing adsorption (ESA) platform technology, originally developed at MIT, to remove carbon dioxide from industrial emissions and the air with 70% energy savings versus conventional approaches.

Vertical Semiconductor logo

Vertical Semiconductor

Energy & Power

Power supply units designed to unleash the full potential of AI & HPC

R3 Energy logo

R3 Energy

Energy & Power

Sparkplug Power logo

Sparkplug Power

Energy & Power

Energy-storage-as-a-service for municipal utilities and commercial businesses

Axiom Optics logo

Axiom Optics

Manufacturing & Processing

Axiom Optics — provides optical instrumentation for fundamental sciences (astronomy, physics, biology) and industrial quality control.

Carbonova logo

Carbonova

Manufacturing & Processing

Carbonova has a unique solution to solidify carbon emissions and lock them permanently in solid carbon nanofibers. To date, 2980 businesses and financial institutions are taking action toward net-zero emissions by 2040 working with the Science-Based Targets initiative (SBTi). Our solution monetizes carbon emissions into solid carbon for our everyday products such as building materials and plastics. Currently solid carbon is extracted from naturally occurring and confined resources such as graphite or oils.

Topl logo

Topl

Infrastructure & Construction

Topl is an impact technology company building a blockchain that empowers businesses to prove and monetize ethical and sustainable practices.

SRECTrade logo

SRECTrade

Energy & Power

Management and transaction platform for environmental commodities to reduce costs and increase transparency

Sunwealth logo

Sunwealth

Energy & Power

PolyJoule logo

PolyJoule

Energy & Power

PolyJoule — develops low-cost, high-power energy storage designed to strengthen the power grid.

Reverse Energy Solutions logo

Reverse Energy Solutions

Transportation & Logistics

Our startup implements innovative mobile solutions for solar panel recycling, drastically reducing logistic costs by 90% through streamlined collection and transportation processes.

ZwitterCo logo

ZwitterCo

Food, Water, & Land

Nanofiltration membranes for wastewater treatment with unprecedented fouling-resistance and size-selectivity.

Infinite Cooling logo

Infinite Cooling

Infrastructure & Construction

Infinite Cooling — reduces water consumption in industrial plants by capturing cooling tower plumes. The company has a patent-pending technology developed at MIT that uses electric fields to capture water from the plumes leaving cooling towers.

Verde Technologies logo

Verde Technologies

Energy & Power

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

Enersion logo

Enersion

Energy & Power

Mantel logo

Mantel

Manufacturing & Processing

Mantel — is developing the most thermally efficient and lowest cost carbon capture technology - helping the world reduce atmospheric CO2 levels.

Agrilab Technologies Inc. logo

Agrilab Technologies Inc.

Food, Water, & Land

Modular compost-aeration and heat-recovery systems

Pressure Core logo

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.

Keystone Tower Systems logo

Keystone Tower Systems

Energy & Power

De-Ice logo

De-Ice

Transportation & Logistics

Electric de-icing technology designed to help the aerospace industry eliminate all chemicals

Verdox Inc logo

Verdox Inc

Manufacturing & Processing

Verdox — is making scalable, cost-effective carbon capture and removal a reality. Founded in late 2019 by Dr. Brian Baynes, Prof. T. Alan Hatton, and Dr. Sahag Voskian, the company is commercializing its electroswing adsorption (ESA) platform technology, originally developed at MIT, to remove carbon dioxide from industrial emissions and the air with 70% energy savings versus conventional approaches.

Vertical Semiconductor logo

Vertical Semiconductor

Energy & Power

Power supply units designed to unleash the full potential of AI & HPC

R3 Energy logo

R3 Energy

Energy & Power

Sparkplug Power logo

Sparkplug Power

Energy & Power

Energy-storage-as-a-service for municipal utilities and commercial businesses

Axiom Optics logo

Axiom Optics

Manufacturing & Processing

Axiom Optics — provides optical instrumentation for fundamental sciences (astronomy, physics, biology) and industrial quality control.

Carbonova logo

Carbonova

Manufacturing & Processing

Carbonova has a unique solution to solidify carbon emissions and lock them permanently in solid carbon nanofibers. To date, 2980 businesses and financial institutions are taking action toward net-zero emissions by 2040 working with the Science-Based Targets initiative (SBTi). Our solution monetizes carbon emissions into solid carbon for our everyday products such as building materials and plastics. Currently solid carbon is extracted from naturally occurring and confined resources such as graphite or oils.

Topl logo

Topl

Infrastructure & Construction

Topl is an impact technology company building a blockchain that empowers businesses to prove and monetize ethical and sustainable practices.

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