Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Julius Education logo

Julius Education

Infrastructure & Construction

Helping green organizations manage the changing workforce through an experience platform for job-seekers

FLUIDXLAB Americas Inc. logo

FLUIDXLAB Americas Inc.

Manufacturing & Processing

AI-powered microfluidic tools that help control and improve fluid processes across many industries

eologix sensor technology logo

eologix sensor technology

Energy & Power

Suyana Climate Insurance logo

Suyana Climate Insurance

FlowCellutions logo

FlowCellutions

Energy & Power

Preventing power outages and improving cost savings for critical battery 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.

Vecarius logo

Vecarius

Infrastructure & Construction

Heat-to-electricity technology to boost energy efficiency in mass markets

SEEDiA logo

SEEDiA

Energy & Power

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

WattSto Energy logo

WattSto Energy

Energy & Power

We are a leading manufacturer of Long Duration Energy Storage (LDES) and Unique Hybrid Design System, providing Fast, Long Duration, Safe, Sustainable, and Cost-effective energy storage solutions at the microgrid and grid levels. Our innovative technology accelerates the integration of renewable energy, reduces carbon emissions, and provides power for a cleaner future.

AllSpice.io logo

AllSpice.io

Infrastructure & Construction

A collaboration hub for hardware teams with revision control, design reviews, and releases

STEM Americas Foundation logo

STEM Americas Foundation

DrinKicks logo

DrinKicks

Food, Water, & Land

Repurposing food waste and recycled materials into shoes

Hibot logo

Hibot

Infrastructure & Construction

Solutions for infrastructures across industries.

Beacon Climate Innovations logo

Beacon Climate Innovations

Energy & Power

Filling gaps between the frontlines of climate change and the emerging technologies that can best address them

Energiency logo

Energiency

Manufacturing & Processing

RUNWITHIT Synthetics Inc. logo

RUNWITHIT Synthetics Inc.

Energy & Power

Molecule Works Inc. logo

Molecule Works Inc.

Manufacturing & Processing

We are developing a low-cost (less than $100/ton) solid sorbent DAC system based on our proprietary reactor/contactor configuration. This design yields very high productivity by delivering low pressure drop, very high heat and mass transfer rates and high sorbent loading. Heat is provided through ls closed loop low temp hot water system so that no steam is needed. After initial charge, no water is consumed. Regeneration is achieved in 20 to 30 minutes.

AeroNero logo

AeroNero

Food, Water, & Land

Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.

Sensible logo

Sensible

Energy & Power

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

Building Envelope Materials logo

Building Envelope Materials

Infrastructure & Construction

Julius Education logo

Julius Education

Infrastructure & Construction

Helping green organizations manage the changing workforce through an experience platform for job-seekers

FLUIDXLAB Americas Inc. logo

FLUIDXLAB Americas Inc.

Manufacturing & Processing

AI-powered microfluidic tools that help control and improve fluid processes across many industries

eologix sensor technology logo

eologix sensor technology

Energy & Power

Suyana Climate Insurance logo

Suyana Climate Insurance

FlowCellutions logo

FlowCellutions

Energy & Power

Preventing power outages and improving cost savings for critical battery 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.

Vecarius logo

Vecarius

Infrastructure & Construction

Heat-to-electricity technology to boost energy efficiency in mass markets

SEEDiA logo

SEEDiA

Energy & Power

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

WattSto Energy logo

WattSto Energy

Energy & Power

We are a leading manufacturer of Long Duration Energy Storage (LDES) and Unique Hybrid Design System, providing Fast, Long Duration, Safe, Sustainable, and Cost-effective energy storage solutions at the microgrid and grid levels. Our innovative technology accelerates the integration of renewable energy, reduces carbon emissions, and provides power for a cleaner future.

AllSpice.io logo

AllSpice.io

Infrastructure & Construction

A collaboration hub for hardware teams with revision control, design reviews, and releases

STEM Americas Foundation logo

STEM Americas Foundation

DrinKicks logo

DrinKicks

Food, Water, & Land

Repurposing food waste and recycled materials into shoes

Hibot logo

Hibot

Infrastructure & Construction

Solutions for infrastructures across industries.

Beacon Climate Innovations logo

Beacon Climate Innovations

Energy & Power

Filling gaps between the frontlines of climate change and the emerging technologies that can best address them

Energiency logo

Energiency

Manufacturing & Processing

RUNWITHIT Synthetics Inc. logo

RUNWITHIT Synthetics Inc.

Energy & Power

Molecule Works Inc. logo

Molecule Works Inc.

Manufacturing & Processing

We are developing a low-cost (less than $100/ton) solid sorbent DAC system based on our proprietary reactor/contactor configuration. This design yields very high productivity by delivering low pressure drop, very high heat and mass transfer rates and high sorbent loading. Heat is provided through ls closed loop low temp hot water system so that no steam is needed. After initial charge, no water is consumed. Regeneration is achieved in 20 to 30 minutes.

AeroNero logo

AeroNero

Food, Water, & Land

Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.

Sensible logo

Sensible

Energy & Power

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

Building Envelope Materials logo

Building Envelope Materials

Infrastructure & Construction

CarbonBlue logo

CarbonBlue

Food, Water, & Land

Blue Atlas Robotics logo

Blue Atlas Robotics

Manufacturing & Processing

Radical Plastics logo

Radical Plastics

Manufacturing & Processing

Radical Plastics — is commercializing a patented technology for producing economical, biodegradable plastics that are a drop-in replacement for conventional, persistent plastics.

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Starfield logo

Starfield

Food, Water, & Land

247Solar logo

247Solar

Energy & Power

High-temp solar power with heat storage for clean industrial heat and renewable power

BETZ Group logo

BETZ Group

Energy & Power

BETZ Group lead a global team of passionate professionals dedicated to advancing the development and adoption of innovative data technologies,remote sensing technologies and IT solutions in the fields of cleantech and critical infrastructure.

RailState logo

RailState

Transportation & Logistics

RailState — answers an increasing demand among freight customers, commodity traders, financial analysts, and government agencies for more current and granular visibility on railway volumes, performance, and condition.

HKG Energy logo

HKG Energy

Energy & Power

Silicon materials that increase battery energy density

Invested Development logo

Invested Development

Food, Water, & Land

AdaViv logo

AdaViv

Food, Water, & Land

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

String Data Motion logo

String Data Motion

Infrastructure & Construction

Agentic AI for energy companies. Agents in motion. Outcomes delivered.

Energy Well Texas logo

Energy Well Texas

Energy & Power

Our mission is to strengthen communities by helping millions of people switch to fairer, more resilient, 100% clean energy.

JURA Bio logo

JURA Bio

Food, Water, & Land

Monadnock Energy logo

Monadnock Energy

Energy & Power

PurposeEnergy logo

PurposeEnergy

Food, Water, & Land

Capro-X logo

Capro-X

Food, Water, & Land

Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals

Canetia Analytics logo

Canetia Analytics

Transportation & Logistics

Canetia Analytics — monitors structures and their natural vibration signature through IoT, artificial intelligence and machine learning to enable a building to be seen from the inside to the outside, continuously and automatically.

Ecobrew logo

Ecobrew

Food, Water, & Land

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

Moonshot Compost logo

Moonshot Compost

Manufacturing & Processing

Moonshot Compost — collects and consolidates food waste for composting from businesses and residents, with a focus on data creation and management.

CarbonBlue logo

CarbonBlue

Food, Water, & Land

Blue Atlas Robotics logo

Blue Atlas Robotics

Manufacturing & Processing

Radical Plastics logo

Radical Plastics

Manufacturing & Processing

Radical Plastics — is commercializing a patented technology for producing economical, biodegradable plastics that are a drop-in replacement for conventional, persistent plastics.

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Starfield logo

Starfield

Food, Water, & Land

247Solar logo

247Solar

Energy & Power

High-temp solar power with heat storage for clean industrial heat and renewable power

BETZ Group logo

BETZ Group

Energy & Power

BETZ Group lead a global team of passionate professionals dedicated to advancing the development and adoption of innovative data technologies,remote sensing technologies and IT solutions in the fields of cleantech and critical infrastructure.

RailState logo

RailState

Transportation & Logistics

RailState — answers an increasing demand among freight customers, commodity traders, financial analysts, and government agencies for more current and granular visibility on railway volumes, performance, and condition.

HKG Energy logo

HKG Energy

Energy & Power

Silicon materials that increase battery energy density

Invested Development logo

Invested Development

Food, Water, & Land

AdaViv logo

AdaViv

Food, Water, & Land

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

String Data Motion logo

String Data Motion

Infrastructure & Construction

Agentic AI for energy companies. Agents in motion. Outcomes delivered.

Energy Well Texas logo

Energy Well Texas

Energy & Power

Our mission is to strengthen communities by helping millions of people switch to fairer, more resilient, 100% clean energy.

JURA Bio logo

JURA Bio

Food, Water, & Land

Monadnock Energy logo

Monadnock Energy

Energy & Power

PurposeEnergy logo

PurposeEnergy

Food, Water, & Land

Capro-X logo

Capro-X

Food, Water, & Land

Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals

Canetia Analytics logo

Canetia Analytics

Transportation & Logistics

Canetia Analytics — monitors structures and their natural vibration signature through IoT, artificial intelligence and machine learning to enable a building to be seen from the inside to the outside, continuously and automatically.

Ecobrew logo

Ecobrew

Food, Water, & Land

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

Moonshot Compost logo

Moonshot Compost

Manufacturing & Processing

Moonshot Compost — collects and consolidates food waste for composting from businesses and residents, with a focus on data creation and management.

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