Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Parasanti logo

Parasanti

Parasanti — is a data orchestration/edge computing firm, specializing in extreme operating environments within both the federal space and advanced energy solutions.

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.

ALGBIO logo

ALGBIO

Manufacturing & Processing

ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.

LNK Energies logo

LNK Energies

Energy & Power

LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.

Return To Vendor logo

Return To Vendor

Manufacturing & Processing

Next Rung Technology logo

Next Rung Technology

Manufacturing & Processing

Supporting clean technologies in their commercialization journeys with expert engineering consulting

Ohm Analytics logo

Ohm Analytics

Energy & Power

Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market

Elementium Materials logo

Elementium Materials

Energy & Power

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

Adaion logo

Adaion

Energy & Power

AI-driven grid optimization & integrated system planning platform

CLS Wind logo

CLS Wind

Energy & Power

Self-erecting system for installing wind turbines

Appollo Wind Technologies logo

Appollo Wind Technologies

Infrastructure & Construction

Phoenix Tailings logo

Phoenix Tailings

Manufacturing & Processing

Waste-free, net-zero, cost-competitive rare-earth-metal refining

Desktop Health logo

Desktop Health

Manufacturing & Processing

Desktop Health (formerly Beacon Bio) — is designing biodegradable and biomimetic tissue grafts using novel materials science and 3D printing technologies.

Helix Earth Technologies logo

Helix Earth Technologies

Infrastructure & Construction

Improving energy efficiency and minimizing emissions through a droplet-capture filtration system

It's Electric logo

It's Electric

Infrastructure & Construction

it's electric accelerates the adoption of EVs with a scalable and simple Level-2 curbside charging solution, ensuring that every community has access to clean, sustainable transportation options. it's electric's "behind the meter" approach simplifies the installation process by eliminating the need for utility coordination, and is the first in the country to offer EVSE hardware with a detachable cord.

Enviro Power Technologies logo

Enviro Power Technologies

Energy & Power

Enviro Power Technologies — is replacing aging heating equipment with their breakthrough SmartWatt heat & power technology providing energy solutions servicing millions of homes, businesses and their power utilities in lowering ever increasing utility bills and increasing resiliency and reliability.

Maxwellian logo

Maxwellian

Energy & Power

Maxwellian — empowers mobility, energy, and agricultural industries by providing autonomous sanitization and monitoring solutions using unique optical IoT technology to ensure data accessibility for safety and asset management.

ThermaFuels logo

ThermaFuels

Transportation & Logistics

Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure

Folia Materials logo

Folia Materials

Manufacturing & Processing

Folia Materials — is creating a safer, cleaner, and healthier world with its antiviral paper.

ALLY Energy logo

ALLY Energy

Infrastructure & Construction

ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.

Parasanti logo

Parasanti

Parasanti — is a data orchestration/edge computing firm, specializing in extreme operating environments within both the federal space and advanced energy solutions.

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.

ALGBIO logo

ALGBIO

Manufacturing & Processing

ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.

LNK Energies logo

LNK Energies

Energy & Power

LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.

Return To Vendor logo

Return To Vendor

Manufacturing & Processing

Next Rung Technology logo

Next Rung Technology

Manufacturing & Processing

Supporting clean technologies in their commercialization journeys with expert engineering consulting

Ohm Analytics logo

Ohm Analytics

Energy & Power

Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market

Elementium Materials logo

Elementium Materials

Energy & Power

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

Adaion logo

Adaion

Energy & Power

AI-driven grid optimization & integrated system planning platform

CLS Wind logo

CLS Wind

Energy & Power

Self-erecting system for installing wind turbines

Appollo Wind Technologies logo

Appollo Wind Technologies

Infrastructure & Construction

Phoenix Tailings logo

Phoenix Tailings

Manufacturing & Processing

Waste-free, net-zero, cost-competitive rare-earth-metal refining

Desktop Health logo

Desktop Health

Manufacturing & Processing

Desktop Health (formerly Beacon Bio) — is designing biodegradable and biomimetic tissue grafts using novel materials science and 3D printing technologies.

Helix Earth Technologies logo

Helix Earth Technologies

Infrastructure & Construction

Improving energy efficiency and minimizing emissions through a droplet-capture filtration system

It's Electric logo

It's Electric

Infrastructure & Construction

it's electric accelerates the adoption of EVs with a scalable and simple Level-2 curbside charging solution, ensuring that every community has access to clean, sustainable transportation options. it's electric's "behind the meter" approach simplifies the installation process by eliminating the need for utility coordination, and is the first in the country to offer EVSE hardware with a detachable cord.

Enviro Power Technologies logo

Enviro Power Technologies

Energy & Power

Enviro Power Technologies — is replacing aging heating equipment with their breakthrough SmartWatt heat & power technology providing energy solutions servicing millions of homes, businesses and their power utilities in lowering ever increasing utility bills and increasing resiliency and reliability.

Maxwellian logo

Maxwellian

Energy & Power

Maxwellian — empowers mobility, energy, and agricultural industries by providing autonomous sanitization and monitoring solutions using unique optical IoT technology to ensure data accessibility for safety and asset management.

ThermaFuels logo

ThermaFuels

Transportation & Logistics

Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure

Folia Materials logo

Folia Materials

Manufacturing & Processing

Folia Materials — is creating a safer, cleaner, and healthier world with its antiviral paper.

ALLY Energy logo

ALLY Energy

Infrastructure & Construction

ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.

Stork, a Fluor Company logo

Stork, a Fluor Company

Freshr Technologies logo

Freshr Technologies

Food, Water, & Land

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

Autonomous Marine Systems logo

Autonomous Marine Systems

Food, Water, & Land

MCatalysis logo

MCatalysis

Manufacturing & Processing

Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology

Inovues logo

Inovues

Infrastructure & Construction

Fervo Energy logo

Fervo Energy

Energy & Power

Fervo Energy — is a next-generation geothermal power developer, delivering 24/7 carbon-free energy.

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Searover Robotics and Software logo

Searover Robotics and Software

Manufacturing & Processing

Full Cycle Bioplastics logo

Full Cycle Bioplastics

Manufacturing & Processing

XMtrace logo

XMtrace

Manufacturing & Processing

Low-cost methane monitoring with real-time detection and autonomous response

Mass Magnetics logo

Mass Magnetics

Manufacturing & Processing

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

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.

Ententia logo

Ententia

Energy & Power

Trusted, scalable enterprise AI solutions that turn context into competitive advantage

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

Carbion logo

Carbion

Manufacturing & Processing

Affordable and clean biomass transformation to graphite for batteries

Kuva Systems logo

Kuva Systems

Manufacturing & Processing

Transaera logo

Transaera

Infrastructure & Construction

Ultra-efficient air conditioning using a novel desiccant material

BERKM logo

BERKM

Manufacturing & Processing

Verdox Inc logo

Verdox Inc

Manufacturing & Processing

Verdox — is making scalable, cost-effective carbon capture and removal a reality. Founded in late 2019 by Dr. Brian Baynes, Prof. T. Alan Hatton, and Dr. Sahag Voskian, the company is commercializing its electroswing adsorption (ESA) platform technology, originally developed at MIT, to remove carbon dioxide from industrial emissions and the air with 70% energy savings versus conventional approaches.

Stork, a Fluor Company logo

Stork, a Fluor Company

Freshr Technologies logo

Freshr Technologies

Food, Water, & Land

Planetary Hydrogen logo

Planetary Hydrogen

Manufacturing & Processing

Autonomous Marine Systems logo

Autonomous Marine Systems

Food, Water, & Land

MCatalysis logo

MCatalysis

Manufacturing & Processing

Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology

Inovues logo

Inovues

Infrastructure & Construction

Fervo Energy logo

Fervo Energy

Energy & Power

Fervo Energy — is a next-generation geothermal power developer, delivering 24/7 carbon-free energy.

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Searover Robotics and Software logo

Searover Robotics and Software

Manufacturing & Processing

Full Cycle Bioplastics logo

Full Cycle Bioplastics

Manufacturing & Processing

XMtrace logo

XMtrace

Manufacturing & Processing

Low-cost methane monitoring with real-time detection and autonomous response

Mass Magnetics logo

Mass Magnetics

Manufacturing & Processing

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

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.

Ententia logo

Ententia

Energy & Power

Trusted, scalable enterprise AI solutions that turn context into competitive advantage

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

Carbion logo

Carbion

Manufacturing & Processing

Affordable and clean biomass transformation to graphite for batteries

Kuva Systems logo

Kuva Systems

Manufacturing & Processing

Transaera logo

Transaera

Infrastructure & Construction

Ultra-efficient air conditioning using a novel desiccant material

BERKM logo

BERKM

Manufacturing & Processing

Verdox Inc logo

Verdox Inc

Manufacturing & Processing

Verdox — is making scalable, cost-effective carbon capture and removal a reality. Founded in late 2019 by Dr. Brian Baynes, Prof. T. Alan Hatton, and Dr. Sahag Voskian, the company is commercializing its electroswing adsorption (ESA) platform technology, originally developed at MIT, to remove carbon dioxide from industrial emissions and the air with 70% energy savings versus conventional approaches.

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