Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Reframe Systems logo

Reframe Systems

Infrastructure & Construction

Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories

Sealed logo

Sealed

Infrastructure & Construction

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

Alma Energy logo

Alma Energy

Energy & Power

Geothermal exploration to deliver scaled renewable energy production at economic levels

Newfound Materials logo

Newfound Materials

Manufacturing & Processing

The synthesis design layer for making new materials.

Dottir Labs logo

Dottir Labs

Food, Water, & Land

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

Exakom logo

Exakom

Manufacturing & Processing

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

Encore CO2 logo

Encore CO2

Manufacturing & Processing

Converting captured CO₂ into valuable industrial molecules

Applied Gaia logo

Applied Gaia

Food, Water, & Land

Sequestering carbon in the soil

Ecobrew logo

Ecobrew

Food, Water, & Land

Recycling clean CO₂ at the source for a circular supply, local reuse, or sale

Intention logo

Intention

Energy & Power

Climate-infrastructure-investment platform

Corvus Robotics logo

Corvus Robotics

Manufacturing & Processing

Green Path Strategies logo

Green Path Strategies

Energy & Power

DrinKicks logo

DrinKicks

Food, Water, & Land

Repurposing food waste and recycled materials into shoes

Daniel Consulting Group, LLC logo

Daniel Consulting Group, LLC

Energy & Power

Helping researchers improve battery and cell testing and providing due diligence for potential investors

Emerald Cities Collaborative logo

Emerald Cities Collaborative

Infrastructure & Construction

VesprSolar logo

VesprSolar

Energy & Power

VesprSolar — is transforming how solar panels are installed. VesprSolar V-Clamp™ is a low-cost fastener that makes solar arrays more secure and faster to install.

Visolis logo

Visolis

Infrastructure & Construction

Onvector logo

Onvector

Infrastructure & Construction

Non-chemical water treatment using plasma to rid water of PFAS and more

Mission Zero Technologies logo

Mission Zero Technologies

Manufacturing & Processing

Efficient electrochemistry to capture CO₂

Reframe Systems logo

Reframe Systems

Infrastructure & Construction

Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories

Sealed logo

Sealed

Infrastructure & Construction

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

Alma Energy logo

Alma Energy

Energy & Power

Geothermal exploration to deliver scaled renewable energy production at economic levels

Newfound Materials logo

Newfound Materials

Manufacturing & Processing

The synthesis design layer for making new materials.

Dottir Labs logo

Dottir Labs

Food, Water, & Land

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

Exakom logo

Exakom

Manufacturing & Processing

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

Encore CO2 logo

Encore CO2

Manufacturing & Processing

Converting captured CO₂ into valuable industrial molecules

Applied Gaia logo

Applied Gaia

Food, Water, & Land

Sequestering carbon in the soil

Ecobrew logo

Ecobrew

Food, Water, & Land

Recycling clean CO₂ at the source for a circular supply, local reuse, or sale

Intention logo

Intention

Energy & Power

Climate-infrastructure-investment platform

Corvus Robotics logo

Corvus Robotics

Manufacturing & Processing

Green Path Strategies logo

Green Path Strategies

Energy & Power

DrinKicks logo

DrinKicks

Food, Water, & Land

Repurposing food waste and recycled materials into shoes

Daniel Consulting Group, LLC logo

Daniel Consulting Group, LLC

Energy & Power

Helping researchers improve battery and cell testing and providing due diligence for potential investors

Emerald Cities Collaborative logo

Emerald Cities Collaborative

Infrastructure & Construction

VesprSolar logo

VesprSolar

Energy & Power

VesprSolar — is transforming how solar panels are installed. VesprSolar V-Clamp™ is a low-cost fastener that makes solar arrays more secure and faster to install.

Visolis logo

Visolis

Infrastructure & Construction

Onvector logo

Onvector

Infrastructure & Construction

Non-chemical water treatment using plasma to rid water of PFAS and more

Mission Zero Technologies logo

Mission Zero Technologies

Manufacturing & Processing

Efficient electrochemistry to capture CO₂

CarTwin logo

CarTwin

Transportation & Logistics

CarTwin is unlocking the value of automative data by creating an integrated data ecosystem to drive actionable insight and predictive analytics to address the industry’s most pressing challenges. Its digital twin technology enables a diverse set of automotive use cases that power new innovations by connecting physical and digital worlds providing real-time operational awareness of vehicle, component, and manufacturing performance.

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Sheetak logo

Sheetak

Manufacturing & Processing

Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.

Blue Atlas Robotics logo

Blue Atlas Robotics

Manufacturing & Processing

EcoForge logo

EcoForge

Food, Water, & Land

-- is a building material technology company developing affordable, high-performance building materials from local agricultural residues, replacing energy-intensive, fossil-based materials. This sustainable approach increases resilience to climate and supply chain risks, supports local farming, and job creation. Moreover, EcoForge’s toxic chemical-free material recipe promotes healthier indoor environments.

MoveEV logo

MoveEV

Transportation & Logistics

Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees

Building Envelope Materials logo

Building Envelope Materials

Infrastructure & Construction

Innoveering logo

Innoveering

Manufacturing & Processing

InnoSepra logo

InnoSepra

Energy & Power

Hunt Energy Enterprises logo

Hunt Energy Enterprises

Energy & Power

Mass Magnetics logo

Mass Magnetics

Manufacturing & Processing

MECo specializes in the automated manufacture of structured functional materials for magnetic and electrochemical applications.

INpower logo

INpower

INpower — is a specialty insurance brokerage & risk management firm that knows that business innovation generates risk. Their risk management mission is simple: to provide their clients with deep insurance expertise, thoughtful enterprise risk management counsel, and fierce claims advocacy supported by offices in: Houston, Boston and Irvine, California.

NeuroBionics logo

NeuroBionics

Manufacturing & Processing

Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation

Upstream Tech logo

Upstream Tech

Energy & Power

Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts

Nebumi logo

Nebumi

Energy & Power

Emissions intelligence platform, monitoring pollution with satellite data and AI

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Lite-1 logo

Lite-1

Manufacturing & Processing

Clean, scalable, microbe-made colour to replace toxic dyes

ZwitterCo logo

ZwitterCo

Food, Water, & Land

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

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

Halo Energy logo

Halo Energy

Energy & Power

CarTwin logo

CarTwin

Transportation & Logistics

CarTwin is unlocking the value of automative data by creating an integrated data ecosystem to drive actionable insight and predictive analytics to address the industry’s most pressing challenges. Its digital twin technology enables a diverse set of automotive use cases that power new innovations by connecting physical and digital worlds providing real-time operational awareness of vehicle, component, and manufacturing performance.

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Sheetak logo

Sheetak

Manufacturing & Processing

Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.

Blue Atlas Robotics logo

Blue Atlas Robotics

Manufacturing & Processing

EcoForge logo

EcoForge

Food, Water, & Land

-- is a building material technology company developing affordable, high-performance building materials from local agricultural residues, replacing energy-intensive, fossil-based materials. This sustainable approach increases resilience to climate and supply chain risks, supports local farming, and job creation. Moreover, EcoForge’s toxic chemical-free material recipe promotes healthier indoor environments.

MoveEV logo

MoveEV

Transportation & Logistics

Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees

Building Envelope Materials logo

Building Envelope Materials

Infrastructure & Construction

Innoveering logo

Innoveering

Manufacturing & Processing

InnoSepra logo

InnoSepra

Energy & Power

Hunt Energy Enterprises logo

Hunt Energy Enterprises

Energy & Power

Mass Magnetics logo

Mass Magnetics

Manufacturing & Processing

MECo specializes in the automated manufacture of structured functional materials for magnetic and electrochemical applications.

INpower logo

INpower

INpower — is a specialty insurance brokerage & risk management firm that knows that business innovation generates risk. Their risk management mission is simple: to provide their clients with deep insurance expertise, thoughtful enterprise risk management counsel, and fierce claims advocacy supported by offices in: Houston, Boston and Irvine, California.

NeuroBionics logo

NeuroBionics

Manufacturing & Processing

Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation

Upstream Tech logo

Upstream Tech

Energy & Power

Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts

Nebumi logo

Nebumi

Energy & Power

Emissions intelligence platform, monitoring pollution with satellite data and AI

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Lite-1 logo

Lite-1

Manufacturing & Processing

Clean, scalable, microbe-made colour to replace toxic dyes

ZwitterCo logo

ZwitterCo

Food, Water, & Land

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

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

Halo Energy logo

Halo Energy

Energy & Power

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