Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Exakom logo

Exakom

Manufacturing & Processing

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

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.

Agira logo

Agira

Energy & Power

Agira Photonics — designs optical films for superior light management. Applications requiring highly collimated light with minimal chromatic aberration, such as LED lighting and displays, can be made more efficient with Agira’s film technology.

Spec Sensors LLC logo

Spec Sensors LLC

Energy & Power

Hydrogen sensor nodes to monitor and characterize leaks and emissions in hydrogen infrastructure

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.

Trellis Air logo

Trellis Air

Infrastructure & Construction

Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers

eologix sensor technology logo

eologix sensor technology

Energy & Power

Energy-autonomous sensors for ice detection and temperature measurement

SnoFox Sciences logo

SnoFox Sciences

Transportation & Logistics

SnoFox Sciences — is developing a platform that provides actionable insights such as fault classification and predictive maintenance recommendations to the operators and stakeholders responsible for the performance and reliability of refrigerated spaces.

Turnover Labs logo

Turnover Labs

Manufacturing & Processing

Modular electrolyzers converting dirty onsite CO₂ into basic chemicals

Bodhi logo

Bodhi

Energy & Power

Bodhi — cultivates the bond between people and the energy that powers their lives. The company’s software platform empowers solar companies to deliver amazing customer experiences with ease. Bodhi automates communication and personalizes the homeowners’ experience, so that installers can focus on what they do best – executing projects, making more sales, and transforming communities around energy.

RenewCO₂ logo

RenewCO₂

Manufacturing & Processing

Electrochemical process to convert CO₂ into fuels and chemicals, such as SAF and propylene glycol

Blue Atlas Robotics logo

Blue Atlas Robotics

Manufacturing & Processing

Rapid, large-scale data collection and 3D-modeling of underwater assets

Renu Energy logo

Renu Energy

Manufacturing & Processing

Converting waste and converting it into fuels and energy helping to create a more responsible environment

SWTCH Energy Inc. logo

SWTCH Energy Inc.

Transportation & Logistics

Supplies, installs, and manages EV charging infrastructure based on client- and site-specific requirements

Autonomous Marine Systems logo

Autonomous Marine Systems

Food, Water, & Land

Wind- and solar-powered robotic boats to collect data from oceans with zero emissions

Revvit logo

Revvit

Infrastructure & Construction

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

R3 Energy logo

R3 Energy

Energy & Power

Energy efficiency management for buildings

ZwitterCo logo

ZwitterCo

Food, Water, & Land

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

Moonflower Farms logo

Moonflower Farms

Food, Water, & Land

Moonflower Technologies uses space age technology to solve real world problems.

DirtSat logo

DirtSat

Food, Water, & Land

DirtSat — looks at ways space resources can have profound impacts on some of our planet’s biggest challenges and is reframing urban food production pathways and climate resilience for Smart City adoption.

Exakom logo

Exakom

Manufacturing & Processing

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

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.

Agira logo

Agira

Energy & Power

Agira Photonics — designs optical films for superior light management. Applications requiring highly collimated light with minimal chromatic aberration, such as LED lighting and displays, can be made more efficient with Agira’s film technology.

Spec Sensors LLC logo

Spec Sensors LLC

Energy & Power

Hydrogen sensor nodes to monitor and characterize leaks and emissions in hydrogen infrastructure

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.

Trellis Air logo

Trellis Air

Infrastructure & Construction

Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers

eologix sensor technology logo

eologix sensor technology

Energy & Power

Energy-autonomous sensors for ice detection and temperature measurement

SnoFox Sciences logo

SnoFox Sciences

Transportation & Logistics

SnoFox Sciences — is developing a platform that provides actionable insights such as fault classification and predictive maintenance recommendations to the operators and stakeholders responsible for the performance and reliability of refrigerated spaces.

Turnover Labs logo

Turnover Labs

Manufacturing & Processing

Modular electrolyzers converting dirty onsite CO₂ into basic chemicals

Bodhi logo

Bodhi

Energy & Power

Bodhi — cultivates the bond between people and the energy that powers their lives. The company’s software platform empowers solar companies to deliver amazing customer experiences with ease. Bodhi automates communication and personalizes the homeowners’ experience, so that installers can focus on what they do best – executing projects, making more sales, and transforming communities around energy.

RenewCO₂ logo

RenewCO₂

Manufacturing & Processing

Electrochemical process to convert CO₂ into fuels and chemicals, such as SAF and propylene glycol

Blue Atlas Robotics logo

Blue Atlas Robotics

Manufacturing & Processing

Rapid, large-scale data collection and 3D-modeling of underwater assets

Renu Energy logo

Renu Energy

Manufacturing & Processing

Converting waste and converting it into fuels and energy helping to create a more responsible environment

SWTCH Energy Inc. logo

SWTCH Energy Inc.

Transportation & Logistics

Supplies, installs, and manages EV charging infrastructure based on client- and site-specific requirements

Autonomous Marine Systems logo

Autonomous Marine Systems

Food, Water, & Land

Wind- and solar-powered robotic boats to collect data from oceans with zero emissions

Revvit logo

Revvit

Infrastructure & Construction

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

R3 Energy logo

R3 Energy

Energy & Power

Energy efficiency management for buildings

ZwitterCo logo

ZwitterCo

Food, Water, & Land

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

Moonflower Farms logo

Moonflower Farms

Food, Water, & Land

Moonflower Technologies uses space age technology to solve real world problems.

DirtSat logo

DirtSat

Food, Water, & Land

DirtSat — looks at ways space resources can have profound impacts on some of our planet’s biggest challenges and is reframing urban food production pathways and climate resilience for Smart City adoption.

Hygen logo

Hygen

Energy & Power

Supercharger that fuels gas-powered vehicles efficiently

Root AI logo

Root AI

Food, Water, & Land

Intelligent robots to help growers manage efficient indoor farms

PURGIT logo

PURGIT

Transportation & Logistics

Build a verifiable vapor control system that makes no pollution and recovers the VOC for recycling. Reduce air pollution and claim carbon credits.

Alloy Enterprises logo

Alloy Enterprises

Manufacturing & Processing

Alloy Enterprises — is developing a new manufacturing method to change the way the world makes aluminum parts.

CERT Systems logo

CERT Systems

Manufacturing & Processing

Converting CO₂ into renewable chemical fuels and feedstocks using water and electricity

Octavia Carbon Co logo

Octavia Carbon Co

Manufacturing & Processing

Geothermal heat to capture and mineralize CO₂

pH Matter logo

pH Matter

Energy & Power

Developing, manufacturing, and commercializing carbon-based materials for electrochemical applications

Save Energy Systems logo

Save Energy Systems

Infrastructure & Construction

Intelligent control for multiple HVAC systems in small- to medium-sized facilities

Osmoses logo

Osmoses

Manufacturing & Processing

Osmoses — develops advanced membrane technology for efficient gas and vapor separations.

Biosfera logo

Biosfera

Manufacturing & Processing

Production of isoprene from CO₂ for rubber manufacturing, solvents, and fuels

Polymer-X logo

Polymer-X

Manufacturing & Processing

Electrifying sustainable chemical production from waste and hydrocarbons

Massachusetts Climatetech Studio logo

Massachusetts Climatetech Studio

Energy & Power

Matching teams of entrepreneurs with cutting-edge university and federal lab technologies

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.

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.

SpadXTech logo

SpadXTech

Food, Water, & Land

SpadXTech — seeks to significantly reduce CO2 emissions through the manufacturing of various carbon negative cellulose-based materials.

FluxWorks logo

FluxWorks

Manufacturing & Processing

Mechatronics company offering dual-use magnetic gears, magnetically geared actuators, sensors, and software

Stork, a Fluor Company logo

Stork, a Fluor Company

Asset lifecycle-monitoring solutions

FibreCoat logo

FibreCoat

Transportation & Logistics

Thermoplastic-coated glass fibers for use in fiber composites for the automotive and consumer sectors

Earthbond logo

Earthbond

Energy & Power

Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.

Appollo Wind Technologies logo

Appollo Wind Technologies

Infrastructure & Construction

Improving operation efficiency for HVAC systems

Hygen logo

Hygen

Energy & Power

Supercharger that fuels gas-powered vehicles efficiently

Root AI logo

Root AI

Food, Water, & Land

Intelligent robots to help growers manage efficient indoor farms

PURGIT logo

PURGIT

Transportation & Logistics

Build a verifiable vapor control system that makes no pollution and recovers the VOC for recycling. Reduce air pollution and claim carbon credits.

Alloy Enterprises logo

Alloy Enterprises

Manufacturing & Processing

Alloy Enterprises — is developing a new manufacturing method to change the way the world makes aluminum parts.

CERT Systems logo

CERT Systems

Manufacturing & Processing

Converting CO₂ into renewable chemical fuels and feedstocks using water and electricity

Octavia Carbon Co logo

Octavia Carbon Co

Manufacturing & Processing

Geothermal heat to capture and mineralize CO₂

pH Matter logo

pH Matter

Energy & Power

Developing, manufacturing, and commercializing carbon-based materials for electrochemical applications

Save Energy Systems logo

Save Energy Systems

Infrastructure & Construction

Intelligent control for multiple HVAC systems in small- to medium-sized facilities

Osmoses logo

Osmoses

Manufacturing & Processing

Osmoses — develops advanced membrane technology for efficient gas and vapor separations.

Biosfera logo

Biosfera

Manufacturing & Processing

Production of isoprene from CO₂ for rubber manufacturing, solvents, and fuels

Polymer-X logo

Polymer-X

Manufacturing & Processing

Electrifying sustainable chemical production from waste and hydrocarbons

Massachusetts Climatetech Studio logo

Massachusetts Climatetech Studio

Energy & Power

Matching teams of entrepreneurs with cutting-edge university and federal lab technologies

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.

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.

SpadXTech logo

SpadXTech

Food, Water, & Land

SpadXTech — seeks to significantly reduce CO2 emissions through the manufacturing of various carbon negative cellulose-based materials.

FluxWorks logo

FluxWorks

Manufacturing & Processing

Mechatronics company offering dual-use magnetic gears, magnetically geared actuators, sensors, and software

Stork, a Fluor Company logo

Stork, a Fluor Company

Asset lifecycle-monitoring solutions

FibreCoat logo

FibreCoat

Transportation & Logistics

Thermoplastic-coated glass fibers for use in fiber composites for the automotive and consumer sectors

Earthbond logo

Earthbond

Energy & Power

Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.

Appollo Wind Technologies logo

Appollo Wind Technologies

Infrastructure & Construction

Improving operation efficiency for HVAC systems

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