Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Clean Power logo

Clean Power

Energy & Power

LA NPDT logo

LA NPDT

Orien Energy logo

Orien Energy

Infrastructure & Construction

Sorption heat pump to recover waste heat from dryer exhaust

Transocean logo

Transocean

Sustainable America logo

Sustainable America

Food, Water, & Land

Acelerex logo

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.

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.

Ignition Packaging logo

Ignition Packaging

About the Company Ignition Packaging is a biomaterials company developing scalable, cost-competitive alternatives to conventional petroleum-based foams. Ignition Packaging’s core technology transforms agricultural byproducts into a high-performance, biodegradable foam engineered […]

Metalex Commodities logo

Metalex Commodities

Manufacturing & Processing

Metalex delivers carbon neutral critical metals needed for the green energy transition.

Carbon Upcycling Technologies logo

Carbon Upcycling Technologies

Manufacturing & Processing

Carbon Upcycling Technologies (Calgary, AB) is a circular decarbonization solution for hard-to-abate industries –- utilizing low-purity industrial CO2 and industrial by-products to decarbonize cement.

FlowCellutions logo

FlowCellutions

Energy & Power

Preventing power outages and improving cost savings for critical battery systems

Terrapin Geothermics logo

Terrapin Geothermics

Energy & Power

Terrapin Geothermics — develops energy projects that reduce the emissions intensity of the industrial sectors.

Understory logo

Understory

Infrastructure & Construction

Weather hardware and analytics

Pika Energy logo

Pika Energy

Energy & Power

AdaViv logo

AdaViv

Food, Water, & Land

Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor

Emerald Cities Collaborative logo

Emerald Cities Collaborative

Infrastructure & Construction

Exakom logo

Exakom

Manufacturing & Processing

Exakom — is a pioneer in developing innovative data analysis products for the industrial automation market.

Realizse logo

Realizse

Energy & Power

Tokenization and product verification for circularity, energy, and the real estate markets

ONEPREDICT logo

ONEPREDICT

Manufacturing & Processing

Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries

Allium Engineering logo

Allium Engineering

Manufacturing & Processing

Allium Engineering — is a US-based startup founded by two MIT Ph.D graduates that designs and manufactures coated rebar technology that will create a more resilient, affordable, and sustainable infrastructure.

Clean Power logo

Clean Power

Energy & Power

LA NPDT logo

LA NPDT

Orien Energy logo

Orien Energy

Infrastructure & Construction

Sorption heat pump to recover waste heat from dryer exhaust

Transocean logo

Transocean

Sustainable America logo

Sustainable America

Food, Water, & Land

Acelerex logo

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.

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.

Ignition Packaging logo

Ignition Packaging

About the Company Ignition Packaging is a biomaterials company developing scalable, cost-competitive alternatives to conventional petroleum-based foams. Ignition Packaging’s core technology transforms agricultural byproducts into a high-performance, biodegradable foam engineered […]

Metalex Commodities logo

Metalex Commodities

Manufacturing & Processing

Metalex delivers carbon neutral critical metals needed for the green energy transition.

Carbon Upcycling Technologies logo

Carbon Upcycling Technologies

Manufacturing & Processing

Carbon Upcycling Technologies (Calgary, AB) is a circular decarbonization solution for hard-to-abate industries –- utilizing low-purity industrial CO2 and industrial by-products to decarbonize cement.

FlowCellutions logo

FlowCellutions

Energy & Power

Preventing power outages and improving cost savings for critical battery systems

Terrapin Geothermics logo

Terrapin Geothermics

Energy & Power

Terrapin Geothermics — develops energy projects that reduce the emissions intensity of the industrial sectors.

Understory logo

Understory

Infrastructure & Construction

Weather hardware and analytics

Pika Energy logo

Pika Energy

Energy & Power

AdaViv logo

AdaViv

Food, Water, & Land

Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor

Emerald Cities Collaborative logo

Emerald Cities Collaborative

Infrastructure & Construction

Exakom logo

Exakom

Manufacturing & Processing

Exakom — is a pioneer in developing innovative data analysis products for the industrial automation market.

Realizse logo

Realizse

Energy & Power

Tokenization and product verification for circularity, energy, and the real estate markets

ONEPREDICT logo

ONEPREDICT

Manufacturing & Processing

Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries

Allium Engineering logo

Allium Engineering

Manufacturing & Processing

Allium Engineering — is a US-based startup founded by two MIT Ph.D graduates that designs and manufactures coated rebar technology that will create a more resilient, affordable, and sustainable infrastructure.

Visolis logo

Visolis

Infrastructure & Construction

Amogy logo

Amogy

Energy & Power

Amogy — is building a novel portable carbon-free energy system using ammonia as a renewable fuel. Their system has 5x higher system-level energy densities compared to lithium batteries.

Next Rung Technology logo

Next Rung Technology

Manufacturing & Processing

Supporting clean technologies in their commercialization journeys with expert engineering consulting

MissionPoint Capital Partners logo

MissionPoint Capital Partners

Aelun logo

Aelun

Ranger Solar logo

Ranger Solar

Energy & Power

Dandelion Energy logo

Dandelion Energy

Infrastructure & Construction

Geothermal heating and cooling systems for homes

Browning the Green Space logo

Browning the Green Space

Food, Water, & Land

Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

AIRCO logo

AIRCO

Energy & Power

QuEra Computing logo

QuEra Computing

Thalon Materials logo

Thalon Materials

GreenChoice logo

GreenChoice

Food, Water, & Land

Corumat logo

Corumat

Manufacturing & Processing

Root AI logo

Root AI

Food, Water, & Land

InventWood logo

InventWood

Infrastructure & Construction

InventWood — offers MettleWood, a super-strong wood material (that's stronger than steel), a highly insulative wood material (as a green substitute for polystyrene) and even a transparent wood material.

Sensible logo

Sensible

Energy & Power

Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC

Monadnock Energy logo

Monadnock Energy

Energy & Power

SeebeckCell Technologies logo

SeebeckCell Technologies

Manufacturing & Processing

SeebeckCell Technologies — develops and manufactures liquid-based thermoelectric modules, power generators, and waste heat recovery systems.

SiTration logo

SiTration

Manufacturing & Processing

SiTration — is developing a novel membrane filtration technology that combines durability and performance at low cost to enable highly efficient separations in today’s mega-industries.

Visolis logo

Visolis

Infrastructure & Construction

Amogy logo

Amogy

Energy & Power

Amogy — is building a novel portable carbon-free energy system using ammonia as a renewable fuel. Their system has 5x higher system-level energy densities compared to lithium batteries.

Next Rung Technology logo

Next Rung Technology

Manufacturing & Processing

Supporting clean technologies in their commercialization journeys with expert engineering consulting

MissionPoint Capital Partners logo

MissionPoint Capital Partners

Aelun logo

Aelun

Ranger Solar logo

Ranger Solar

Energy & Power

Dandelion Energy logo

Dandelion Energy

Infrastructure & Construction

Geothermal heating and cooling systems for homes

Browning the Green Space logo

Browning the Green Space

Food, Water, & Land

Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

AIRCO logo

AIRCO

Energy & Power

QuEra Computing logo

QuEra Computing

Thalon Materials logo

Thalon Materials

GreenChoice logo

GreenChoice

Food, Water, & Land

Corumat logo

Corumat

Manufacturing & Processing

Root AI logo

Root AI

Food, Water, & Land

InventWood logo

InventWood

Infrastructure & Construction

InventWood — offers MettleWood, a super-strong wood material (that's stronger than steel), a highly insulative wood material (as a green substitute for polystyrene) and even a transparent wood material.

Sensible logo

Sensible

Energy & Power

Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC

Monadnock Energy logo

Monadnock Energy

Energy & Power

SeebeckCell Technologies logo

SeebeckCell Technologies

Manufacturing & Processing

SeebeckCell Technologies — develops and manufactures liquid-based thermoelectric modules, power generators, and waste heat recovery systems.

SiTration logo

SiTration

Manufacturing & Processing

SiTration — is developing a novel membrane filtration technology that combines durability and performance at low cost to enable highly efficient separations in today’s mega-industries.

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