Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
SEAROVER UNDERWATER ROBOTICS logo

SEAROVER UNDERWATER ROBOTICS

Manufacturing & Processing

Enersion logo

Enersion

Energy & Power

Revvit logo

Revvit

Infrastructure & Construction

Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties

BERKM logo

BERKM

Manufacturing & Processing

Salient Energy logo

Salient Energy

Energy & Power

Dsider logo

Dsider

Energy & Power

SaaS platform to accelerate the expansion of energy-transition projects

Kauel logo

Kauel

Energy & Power

Software that detects industrial threats to prevent environmental risks and catastrophes

LiftOFF Technology logo

LiftOFF Technology

Energy & Power

Batteries with breakthrough energy density and safety

Advent Technologies logo

Advent Technologies

Energy & Power

Advent Technologies — makes ht-pem fuel cells that convert hydrogen and other renewable fuels to electricity. This platform technology that addresses needs in numerous markets, including passenger, commercial vehicle, and lightweight aviation (eVTOL).

REI logo

REI

Energy & Power

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Starfield logo

Starfield

Food, Water, & Land

Metalmark Innovations logo

Metalmark Innovations

Transportation & Logistics

Excipio Energy logo

Excipio Energy

Energy & Power

Excipio Energy — is an offshore renewable energy company integrating wind, wave, currents, OTEC, and power-to-fuel in a single floating platform.

SICDrone logo

SICDrone

Transportation & Logistics

CalWave Power Technologies logo

CalWave Power Technologies

Energy & Power

CalWave — CalWave’s mission is to unlock the vast and steady carbon-free power from ocean waves, bringing superior power-generating technology to market with a global reach. CalWave’s proprietary wave energy converter technology achieves high performance while surviving storms and extreme conditions.

Wellbore Consultants logo

Wellbore Consultants

Energy & Power

Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact

MITO Material Solutions logo

MITO Material Solutions

Manufacturing & Processing

Innovator Energy logo

Innovator Energy

Energy & Power

Developing and deploying solutions in cooling, heating, and heat transfer

Rushnu logo

Rushnu

Manufacturing & Processing

Turns waste into carbon-neutral chemistry

SEAROVER UNDERWATER ROBOTICS logo

SEAROVER UNDERWATER ROBOTICS

Manufacturing & Processing

Enersion logo

Enersion

Energy & Power

Revvit logo

Revvit

Infrastructure & Construction

Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties

BERKM logo

BERKM

Manufacturing & Processing

Salient Energy logo

Salient Energy

Energy & Power

Dsider logo

Dsider

Energy & Power

SaaS platform to accelerate the expansion of energy-transition projects

Kauel logo

Kauel

Energy & Power

Software that detects industrial threats to prevent environmental risks and catastrophes

LiftOFF Technology logo

LiftOFF Technology

Energy & Power

Batteries with breakthrough energy density and safety

Advent Technologies logo

Advent Technologies

Energy & Power

Advent Technologies — makes ht-pem fuel cells that convert hydrogen and other renewable fuels to electricity. This platform technology that addresses needs in numerous markets, including passenger, commercial vehicle, and lightweight aviation (eVTOL).

REI logo

REI

Energy & Power

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Starfield logo

Starfield

Food, Water, & Land

Metalmark Innovations logo

Metalmark Innovations

Transportation & Logistics

Excipio Energy logo

Excipio Energy

Energy & Power

Excipio Energy — is an offshore renewable energy company integrating wind, wave, currents, OTEC, and power-to-fuel in a single floating platform.

SICDrone logo

SICDrone

Transportation & Logistics

CalWave Power Technologies logo

CalWave Power Technologies

Energy & Power

CalWave — CalWave’s mission is to unlock the vast and steady carbon-free power from ocean waves, bringing superior power-generating technology to market with a global reach. CalWave’s proprietary wave energy converter technology achieves high performance while surviving storms and extreme conditions.

Wellbore Consultants logo

Wellbore Consultants

Energy & Power

Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact

MITO Material Solutions logo

MITO Material Solutions

Manufacturing & Processing

Innovator Energy logo

Innovator Energy

Energy & Power

Developing and deploying solutions in cooling, heating, and heat transfer

Rushnu logo

Rushnu

Manufacturing & Processing

Turns waste into carbon-neutral chemistry

Geckskin logo

Geckskin

Manufacturing & Processing

MissionPoint Capital Partners logo

MissionPoint Capital Partners

Energy Toolbase logo

Energy Toolbase

Energy & Power

Energy Toolbase — is an industry leading software platform that provides a cohesive suite of project modeling, energy storage control and asset monitoring products that enable solar and energy storage developers to deploy projects more efficiently.

SmartAC.com logo

SmartAC.com

Infrastructure & Construction

SmartAC.com — is on a mission to perfect the experience of home comfort. The company helps its partners offer next-level service with a more proactive approach to HVAC & plumbing.

Metalex Commodities logo

Metalex Commodities

Manufacturing & Processing

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

QuEra Computing logo

QuEra Computing

Nebumi logo

Nebumi

Energy & Power

Emissions intelligence platform, monitoring pollution with satellite data and AI

Via Separations logo

Via Separations

Manufacturing & Processing

Via Separations — is developing a new membrane material to make manufacturing processes more energy efficient—transforming the production of things like fertilizer and nylon, and with the potential to save a gigaton of carbon each year.

Aja Labs logo

Aja Labs

Manufacturing & Processing

Veloce Energy logo

Veloce Energy

Energy & Power

Veloce Energy — develops technology to create intelligent, flexible, and scalable grid-edge energy networks (GrEEN). Initially focused on cost-reduction in EV charging stations, the Veloce FastGrid™ system uniquely combines energy storage, intelligence, a streamlined installation system, and a unique charging-infrastructure-as-a-service model to maximize and deliver customer value.

SEEDiA logo

SEEDiA

Energy & Power

SEEDiA — is making cities sustainable by reducing CO2 emissions and keeping citizen connected and charged up.

Powerhouse Ventures logo

Powerhouse Ventures

Infrastructure & Construction

Investing in software to advance clean energy, mobility, and industry

Ohmium International logo

Ohmium International

Energy & Power

R3 Energy logo

R3 Energy

Energy & Power

Hibot logo

Hibot

Infrastructure & Construction

Solutions for infrastructures across industries.

Dottir Labs logo

Dottir Labs

Food, Water, & Land

Sensor technology that provides real-time, detailed chemical analysis of water

RailPod logo

RailPod

Transportation & Logistics

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Hertha Metals Inc. logo

Hertha Metals Inc.

Energy & Power

Next Rung Technology logo

Next Rung Technology

Manufacturing & Processing

Supporting clean technologies in their commercialization journeys with expert engineering consulting

Geckskin logo

Geckskin

Manufacturing & Processing

MissionPoint Capital Partners logo

MissionPoint Capital Partners

Energy Toolbase logo

Energy Toolbase

Energy & Power

Energy Toolbase — is an industry leading software platform that provides a cohesive suite of project modeling, energy storage control and asset monitoring products that enable solar and energy storage developers to deploy projects more efficiently.

SmartAC.com logo

SmartAC.com

Infrastructure & Construction

SmartAC.com — is on a mission to perfect the experience of home comfort. The company helps its partners offer next-level service with a more proactive approach to HVAC & plumbing.

Metalex Commodities logo

Metalex Commodities

Manufacturing & Processing

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

QuEra Computing logo

QuEra Computing

Nebumi logo

Nebumi

Energy & Power

Emissions intelligence platform, monitoring pollution with satellite data and AI

Via Separations logo

Via Separations

Manufacturing & Processing

Via Separations — is developing a new membrane material to make manufacturing processes more energy efficient—transforming the production of things like fertilizer and nylon, and with the potential to save a gigaton of carbon each year.

Aja Labs logo

Aja Labs

Manufacturing & Processing

Veloce Energy logo

Veloce Energy

Energy & Power

Veloce Energy — develops technology to create intelligent, flexible, and scalable grid-edge energy networks (GrEEN). Initially focused on cost-reduction in EV charging stations, the Veloce FastGrid™ system uniquely combines energy storage, intelligence, a streamlined installation system, and a unique charging-infrastructure-as-a-service model to maximize and deliver customer value.

SEEDiA logo

SEEDiA

Energy & Power

SEEDiA — is making cities sustainable by reducing CO2 emissions and keeping citizen connected and charged up.

Powerhouse Ventures logo

Powerhouse Ventures

Infrastructure & Construction

Investing in software to advance clean energy, mobility, and industry

Ohmium International logo

Ohmium International

Energy & Power

R3 Energy logo

R3 Energy

Energy & Power

Hibot logo

Hibot

Infrastructure & Construction

Solutions for infrastructures across industries.

Dottir Labs logo

Dottir Labs

Food, Water, & Land

Sensor technology that provides real-time, detailed chemical analysis of water

RailPod logo

RailPod

Transportation & Logistics

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Hertha Metals Inc. logo

Hertha Metals Inc.

Energy & Power

Next Rung Technology logo

Next Rung Technology

Manufacturing & Processing

Supporting clean technologies in their commercialization journeys with expert engineering consulting

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