Helping entrepreneursTransformindustry

Greentown member working in a wet lab
Greentown community members collaborating
Greentown member pipetting in a lab
Greentown members at work in the incubator
[ 01 ]Who We Are

Breakthroughs don't scale in isolation.

They scale when entire ecosystems move together: founders, corporates, capital, policy, and communities, united by a shared purpose of propelling groundbreaking technologies to market, at the pace the world requires.

Transforming the systems that power, move, feed, and connect the world is the work of our time, and startups hold the key.

Our Vision

Greentown is a 501(c)(3) non-profit organization

[ 03 ]Our Startups

Our Member Companies

View All Startups
Respire Energy logo

Respire Energy

Energy & Power

Safe, low-cost, and long-duration metal-air battery designed for microgrids

AeroShield Materials logo

AeroShield Materials

Infrastructure & Construction

Insulating, porous aerogels for energy-efficient windows

Decimetrix logo

Decimetrix

Energy & Power

AI platform to help clients measure their carbon footprint

Elementium Materials logo

Elementium Materials

Energy & Power

Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries

GS Vortex Systems logo

GS Vortex Systems

Food, Water, & Land

Hydrodynamic flow technology reducing flow resistance through pipes

Manatee Energy logo

Manatee Energy

Infrastructure & Construction

Rigorous and automated system design for affordable home heat pumps

A&I Power Group logo

A&I Power Group

Energy & Power

Electricity-generation systems that convert electromagnetic energy into electrical potential

SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

Mars Materials logo

Mars Materials

Manufacturing & Processing

Converting CO₂ and biomass into acrylonitrile

NONA Technologies logo

NONA Technologies

Food, Water, & Land

Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime

AmHyTech logo

AmHyTech

Energy & Power

Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions

Circular Materials logo

Circular Materials

Manufacturing & Processing

Critical raw materials from industrial wastewater

Carbion logo

Carbion

Manufacturing & Processing

Affordable and clean biomass transformation to graphite for batteries

Swan Impact Network logo

Swan Impact Network

Infrastructure & Construction

Angel investor network focusing on supporting early-stage companies

Corrolytics logo

Corrolytics

Energy & Power

Corrosion detection through electrochemical innovation, integrated with advanced AI technology

Emrod logo

Emrod

Energy & Power

Sustainable power with long-range wireless power transfer technology

Circulus Air logo

Circulus Air

Infrastructure & Construction

Clean air systems to directly remove harmful gases and pollutants

PlaSene logo

PlaSene

Manufacturing & Processing

Converting plastic waste into liquid fuel and low-carbon hydrogen

Teknobuilt logo

Teknobuilt

Infrastructure & Construction

Cloud-based construction project management software

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

Respire Energy logo

Respire Energy

Energy & Power

Safe, low-cost, and long-duration metal-air battery designed for microgrids

AeroShield Materials logo

AeroShield Materials

Infrastructure & Construction

Insulating, porous aerogels for energy-efficient windows

Decimetrix logo

Decimetrix

Energy & Power

AI platform to help clients measure their carbon footprint

Elementium Materials logo

Elementium Materials

Energy & Power

Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries

GS Vortex Systems logo

GS Vortex Systems

Food, Water, & Land

Hydrodynamic flow technology reducing flow resistance through pipes

Manatee Energy logo

Manatee Energy

Infrastructure & Construction

Rigorous and automated system design for affordable home heat pumps

A&I Power Group logo

A&I Power Group

Energy & Power

Electricity-generation systems that convert electromagnetic energy into electrical potential

SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

Mars Materials logo

Mars Materials

Manufacturing & Processing

Converting CO₂ and biomass into acrylonitrile

NONA Technologies logo

NONA Technologies

Food, Water, & Land

Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime

AmHyTech logo

AmHyTech

Energy & Power

Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions

Circular Materials logo

Circular Materials

Manufacturing & Processing

Critical raw materials from industrial wastewater

Carbion logo

Carbion

Manufacturing & Processing

Affordable and clean biomass transformation to graphite for batteries

Swan Impact Network logo

Swan Impact Network

Infrastructure & Construction

Angel investor network focusing on supporting early-stage companies

Corrolytics logo

Corrolytics

Energy & Power

Corrosion detection through electrochemical innovation, integrated with advanced AI technology

Emrod logo

Emrod

Energy & Power

Sustainable power with long-range wireless power transfer technology

Circulus Air logo

Circulus Air

Infrastructure & Construction

Clean air systems to directly remove harmful gases and pollutants

PlaSene logo

PlaSene

Manufacturing & Processing

Converting plastic waste into liquid fuel and low-carbon hydrogen

Teknobuilt logo

Teknobuilt

Infrastructure & Construction

Cloud-based construction project management software

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

AtmoSpark Technologies logo

AtmoSpark Technologies

Food, Water, & Land

Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations

Realizse logo

Realizse

Energy & Power

Tokenization and product verification for circularity, energy, and the real estate markets

SolarKal logo

SolarKal

Energy & Power

The largest solar energy marketplace in the U.S., connecting organizations to solar providers

QEA Tech logo

QEA Tech

Energy & Power

Precise, data-driven building-envelope audits using patented AI software, drones, and thermography

ATS Energy logo

ATS Energy

Energy & Power

Converting waste heat into power without any moving parts

Wellbore Consultants logo

Wellbore Consultants

Energy & Power

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

SBD Technologies logo

SBD Technologies

Transportation & Logistics

Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management

Flux Marine logo

Flux Marine

Transportation & Logistics

Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance

Timbergrove logo

Timbergrove

Energy & Power

Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency

Saint-Gobain (Member Account) logo

Saint-Gobain (Member Account)

Infrastructure & Construction

Worldwide leader in light and sustainable construction

Verde Technologies logo

Verde Technologies

Energy & Power

Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption

LOCOAL logo

LOCOAL

Manufacturing & Processing

Turning waste into value, and producing clean energy, biofuels, and carbon credits

ATOM-X logo

ATOM-X

Energy & Power

Transforming CO₂ into sustainable fuels like green methanol

Florrent logo

Florrent

Food, Water, & Land

High-energy-density supercapacitors for energy storage, made from domestic biomass waste

Laminar logo

Laminar

Manufacturing & Processing

IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers

Priority Investor Loans logo

Priority Investor Loans

Infrastructure & Construction

Simplified loan programs to fund real estate investors nationwide with income-producing properties

Biospheric AI logo

Biospheric AI

Energy & Power

High-resolution, building-level energy demand forecasts for utilities and more

PooPoof Inc logo

PooPoof Inc

Food, Water, & Land

The world’s first pocket-sized bioreactor

Elementa Partners logo

Elementa Partners

Infrastructure & Construction

Uniting global talent to unlock high-conviction, institutional-grade investments across Texas growth sectors

Cemvita logo

Cemvita

Manufacturing & Processing

Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop

AtmoSpark Technologies logo

AtmoSpark Technologies

Food, Water, & Land

Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations

Realizse logo

Realizse

Energy & Power

Tokenization and product verification for circularity, energy, and the real estate markets

SolarKal logo

SolarKal

Energy & Power

The largest solar energy marketplace in the U.S., connecting organizations to solar providers

QEA Tech logo

QEA Tech

Energy & Power

Precise, data-driven building-envelope audits using patented AI software, drones, and thermography

ATS Energy logo

ATS Energy

Energy & Power

Converting waste heat into power without any moving parts

Wellbore Consultants logo

Wellbore Consultants

Energy & Power

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

SBD Technologies logo

SBD Technologies

Transportation & Logistics

Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management

Flux Marine logo

Flux Marine

Transportation & Logistics

Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance

Timbergrove logo

Timbergrove

Energy & Power

Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency

Saint-Gobain (Member Account) logo

Saint-Gobain (Member Account)

Infrastructure & Construction

Worldwide leader in light and sustainable construction

Verde Technologies logo

Verde Technologies

Energy & Power

Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption

LOCOAL logo

LOCOAL

Manufacturing & Processing

Turning waste into value, and producing clean energy, biofuels, and carbon credits

ATOM-X logo

ATOM-X

Energy & Power

Transforming CO₂ into sustainable fuels like green methanol

Florrent logo

Florrent

Food, Water, & Land

High-energy-density supercapacitors for energy storage, made from domestic biomass waste

Laminar logo

Laminar

Manufacturing & Processing

IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers

Priority Investor Loans logo

Priority Investor Loans

Infrastructure & Construction

Simplified loan programs to fund real estate investors nationwide with income-producing properties

Biospheric AI logo

Biospheric AI

Energy & Power

High-resolution, building-level energy demand forecasts for utilities and more

PooPoof Inc logo

PooPoof Inc

Food, Water, & Land

The world’s first pocket-sized bioreactor

Elementa Partners logo

Elementa Partners

Infrastructure & Construction

Uniting global talent to unlock high-conviction, institutional-grade investments across Texas growth sectors

Cemvita logo

Cemvita

Manufacturing & Processing

Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop

[ 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

12,915 new jobs created by our members, and counting

Boston

7,492

Houston

5,423

[ 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
  • Microsoft
  • 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
Programs
Two Greentown program participants in the lab

Learn About our Programs

In addition to our Boston and Houston incubators, Greentown runs programs designed to address critical challenges in the climatetech ecosystem.

Explore Programs