Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Biobot Analytics logo

Biobot Analytics

Food, Water, & Land

Eclipse Solar Projects logo

Eclipse Solar Projects

Energy & Power

Eclipse Solar Projects is a developer of utility-scale solar assets that generates, and then sells, power/electricity wholesale.

Criterion Energy Partners logo

Criterion Energy Partners

Energy & Power

Criterion Energy Partners — is an exploration and production company developing decentralized direct geothermal energy projects to help customers reduce emissions and improve operating efficiency using heat from the earth.

KP Labs logo

KP Labs

Manufacturing & Processing

Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues

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.

Massachusetts Climatetech Studio logo

Massachusetts Climatetech Studio

Energy & Power

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.

Skylark Wireless logo

Skylark Wireless

Manufacturing & Processing

Far more than 5G: Skylark builds affordable, long-range, and high-speed wireless systems for rural broadband providers.

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.

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

AmpUp logo

AmpUp

Transportation & Logistics

Medley Thermal logo

Medley Thermal

Energy & Power

Medley Thermal — links clean, cheap power to steam heating systems, lowering a customer's energy costs and carbon emissions.

Nfinite Nanotech logo

Nfinite Nanotech

Manufacturing & Processing

Sankofa Dynamics logo

Sankofa Dynamics

Food, Water, & Land

Transport Phenomena Technologies logo

Transport Phenomena Technologies

Manufacturing & Processing

Transport Phenomena Technologies — models software for thermal management of electronics.

Moonflower Farms logo

Moonflower Farms

Food, Water, & Land

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

Green Path Strategies logo

Green Path Strategies

Energy & Power

RISE Robotics logo

RISE Robotics

Manufacturing & Processing

Renewell Energy logo

Renewell Energy

Energy & Power

Gravitational energy storage

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.

Biobot Analytics logo

Biobot Analytics

Food, Water, & Land

Eclipse Solar Projects logo

Eclipse Solar Projects

Energy & Power

Eclipse Solar Projects is a developer of utility-scale solar assets that generates, and then sells, power/electricity wholesale.

Criterion Energy Partners logo

Criterion Energy Partners

Energy & Power

Criterion Energy Partners — is an exploration and production company developing decentralized direct geothermal energy projects to help customers reduce emissions and improve operating efficiency using heat from the earth.

KP Labs logo

KP Labs

Manufacturing & Processing

Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues

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.

Massachusetts Climatetech Studio logo

Massachusetts Climatetech Studio

Energy & Power

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.

Skylark Wireless logo

Skylark Wireless

Manufacturing & Processing

Far more than 5G: Skylark builds affordable, long-range, and high-speed wireless systems for rural broadband providers.

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.

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

AmpUp logo

AmpUp

Transportation & Logistics

Medley Thermal logo

Medley Thermal

Energy & Power

Medley Thermal — links clean, cheap power to steam heating systems, lowering a customer's energy costs and carbon emissions.

Nfinite Nanotech logo

Nfinite Nanotech

Manufacturing & Processing

Sankofa Dynamics logo

Sankofa Dynamics

Food, Water, & Land

Transport Phenomena Technologies logo

Transport Phenomena Technologies

Manufacturing & Processing

Transport Phenomena Technologies — models software for thermal management of electronics.

Moonflower Farms logo

Moonflower Farms

Food, Water, & Land

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

Green Path Strategies logo

Green Path Strategies

Energy & Power

RISE Robotics logo

RISE Robotics

Manufacturing & Processing

Renewell Energy logo

Renewell Energy

Energy & Power

Gravitational energy storage

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.

Riptide Autonomous Solutions logo

Riptide Autonomous Solutions

Transportation & Logistics

CERT Systems logo

CERT Systems

Manufacturing & Processing

R3 Energy logo

R3 Energy

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.

Regenerative Resources logo

Regenerative Resources

Food, Water, & Land

Regenerative Resources — is an ecosystems services company that acquires highly-degraded land and transforms it in order to reuse it for aquaculture.

Giner Labs logo

Giner Labs

Energy & Power

At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.

Sunforge logo

Sunforge

Energy & Power

Sunforge — creates advanced Maximum Power Point Tracking (MPPT) solar charge controllers for off-grid applications. Its controllers are designed to extract the most power possible from your solar panels and maximize system up-time through the worst conditions.

Sense Labs, Inc. logo

Sense Labs, Inc.

Infrastructure & Construction

The Sense Home Energy monitor tells you what devices in your home are on, and how much energy each is consuming.

PolyQor (Innova8e) logo

PolyQor (Innova8e)

Manufacturing & Processing

Concept Loop is dedicated to repurposing low-value post-industrial and post-consumer plastic waste into sustainable building materials. Our flagship product, EcoGrete, is used in the production of high-strength paver blocks and tiles, offering an eco-friendly solution while reducing environmental impact.

SEAROVER UNDERWATER ROBOTICS logo

SEAROVER UNDERWATER ROBOTICS

Manufacturing & Processing

ConnectDER logo

ConnectDER

Energy & Power

ConnectDER — unlocks the massive potential of DERs by turning the meter socket into the utility’s all-in-one plug-in point for solar, storage, EVs, and beyond.

Stash Energy logo

Stash Energy

Energy & Power

Stash Energy makes home heating and cooling affordable and sustainable with the first smart heat pump with built-in thermal energy storage.

Tank Utility logo

Tank Utility

Energy & Power

Metalex Commodities logo

Metalex Commodities

Manufacturing & Processing

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

Open Ocean Robotics logo

Open Ocean Robotics

Energy & Power

Voltaware logo

Voltaware

Energy & Power

Voltaware is an AI-powered energy intelligence company that helps utilities, energy innovators, and service providers unlock the full potential of energy data to drive energy efficiency and decarbonization.

Piaggio Fast Forward logo

Piaggio Fast Forward

Transportation & Logistics

Accion Systems logo

Accion Systems

Transportation & Logistics

Accion Systems — develops in-space propulsion technologies that optimize scalability, performance, and efficiency to accelerate the exploration of space. Accion’s flagship product, TILE, uses proprietary electrospray thrusters, bringing electric propulsion to satellites of all sizes and redefining in-space capabilities for the 21st century.

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

SWTCH Energy Inc. logo

SWTCH Energy Inc.

Transportation & Logistics

Riptide Autonomous Solutions logo

Riptide Autonomous Solutions

Transportation & Logistics

CERT Systems logo

CERT Systems

Manufacturing & Processing

R3 Energy logo

R3 Energy

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.

Regenerative Resources logo

Regenerative Resources

Food, Water, & Land

Regenerative Resources — is an ecosystems services company that acquires highly-degraded land and transforms it in order to reuse it for aquaculture.

Giner Labs logo

Giner Labs

Energy & Power

At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.

Sunforge logo

Sunforge

Energy & Power

Sunforge — creates advanced Maximum Power Point Tracking (MPPT) solar charge controllers for off-grid applications. Its controllers are designed to extract the most power possible from your solar panels and maximize system up-time through the worst conditions.

Sense Labs, Inc. logo

Sense Labs, Inc.

Infrastructure & Construction

The Sense Home Energy monitor tells you what devices in your home are on, and how much energy each is consuming.

PolyQor (Innova8e) logo

PolyQor (Innova8e)

Manufacturing & Processing

Concept Loop is dedicated to repurposing low-value post-industrial and post-consumer plastic waste into sustainable building materials. Our flagship product, EcoGrete, is used in the production of high-strength paver blocks and tiles, offering an eco-friendly solution while reducing environmental impact.

SEAROVER UNDERWATER ROBOTICS logo

SEAROVER UNDERWATER ROBOTICS

Manufacturing & Processing

ConnectDER logo

ConnectDER

Energy & Power

ConnectDER — unlocks the massive potential of DERs by turning the meter socket into the utility’s all-in-one plug-in point for solar, storage, EVs, and beyond.

Stash Energy logo

Stash Energy

Energy & Power

Stash Energy makes home heating and cooling affordable and sustainable with the first smart heat pump with built-in thermal energy storage.

Tank Utility logo

Tank Utility

Energy & Power

Metalex Commodities logo

Metalex Commodities

Manufacturing & Processing

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

Open Ocean Robotics logo

Open Ocean Robotics

Energy & Power

Voltaware logo

Voltaware

Energy & Power

Voltaware is an AI-powered energy intelligence company that helps utilities, energy innovators, and service providers unlock the full potential of energy data to drive energy efficiency and decarbonization.

Piaggio Fast Forward logo

Piaggio Fast Forward

Transportation & Logistics

Accion Systems logo

Accion Systems

Transportation & Logistics

Accion Systems — develops in-space propulsion technologies that optimize scalability, performance, and efficiency to accelerate the exploration of space. Accion’s flagship product, TILE, uses proprietary electrospray thrusters, bringing electric propulsion to satellites of all sizes and redefining in-space capabilities for the 21st century.

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

SWTCH Energy Inc. logo

SWTCH Energy Inc.

Transportation & Logistics

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