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
BlueShift Carbon logo

BlueShift Carbon

Manufacturing & Processing

Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free

EarthEn logo

EarthEn

Energy & Power

Enabling electrification through CO₂-based thermodynamic cycle

Aluminum Technologies logo

Aluminum Technologies

Manufacturing & Processing

Low-GHG primary aluminum production with Carbo-Chloride Reduction

Rafi Properties logo

Rafi Properties

Infrastructure & Construction

ClearTrace logo

ClearTrace

Energy & Power

Product suite for traceable, end-to-end data management of electricity and certificate transactions

Lydian logo

Lydian

Manufacturing & Processing

Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas

Swiss Vault logo

Swiss Vault

Manufacturing & Processing

Revolutionizing Data Infrastructure for the AI Era

ETAK logo

ETAK

ETAK transforms waste into clean energy. Our modular technology converts unsorted municipal and industrial waste into high-calorific gas, offering a decentralized, 24/7 alternative to fossil fuels and traditional incineration.

Tato Labs logo

Tato Labs

Manufacturing & Processing

Bioplastic products and packaging solutions made from potato starch

Sora Fuel Corporation logo

Sora Fuel Corporation

Transportation & Logistics

Cost-effective sustainable aviation fuel

Biospheric AI logo

Biospheric AI

Energy & Power

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

Lite-1 logo

Lite-1

Manufacturing & Processing

Clean, scalable, microbe-made colour to replace toxic dyes

NeuroBionics logo

NeuroBionics

Manufacturing & Processing

Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation

Peak Power logo

Peak Power

Energy & Power

Energy-storage optimization software for commercial and industrial customers and energy storage project developers

Resolute Methane logo

Resolute Methane

Food, Water, & Land

Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design

Element Resources logo

Element Resources

Energy & Power

Developing large-scale green hydrogen projects

Florrent logo

Florrent

Food, Water, & Land

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

eSki Watercraft logo

eSki Watercraft

Energy & Power

Electric personal watercraft

Teal Bio logo

Teal Bio

Manufacturing & Processing

Reusable N95 respirator system for healthcare workers to reduce landfill waste

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

BlueShift Carbon logo

BlueShift Carbon

Manufacturing & Processing

Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free

EarthEn logo

EarthEn

Energy & Power

Enabling electrification through CO₂-based thermodynamic cycle

Aluminum Technologies logo

Aluminum Technologies

Manufacturing & Processing

Low-GHG primary aluminum production with Carbo-Chloride Reduction

Rafi Properties logo

Rafi Properties

Infrastructure & Construction

ClearTrace logo

ClearTrace

Energy & Power

Product suite for traceable, end-to-end data management of electricity and certificate transactions

Lydian logo

Lydian

Manufacturing & Processing

Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas

Swiss Vault logo

Swiss Vault

Manufacturing & Processing

Revolutionizing Data Infrastructure for the AI Era

ETAK logo

ETAK

ETAK transforms waste into clean energy. Our modular technology converts unsorted municipal and industrial waste into high-calorific gas, offering a decentralized, 24/7 alternative to fossil fuels and traditional incineration.

Tato Labs logo

Tato Labs

Manufacturing & Processing

Bioplastic products and packaging solutions made from potato starch

Sora Fuel Corporation logo

Sora Fuel Corporation

Transportation & Logistics

Cost-effective sustainable aviation fuel

Biospheric AI logo

Biospheric AI

Energy & Power

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

Lite-1 logo

Lite-1

Manufacturing & Processing

Clean, scalable, microbe-made colour to replace toxic dyes

NeuroBionics logo

NeuroBionics

Manufacturing & Processing

Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation

Peak Power logo

Peak Power

Energy & Power

Energy-storage optimization software for commercial and industrial customers and energy storage project developers

Resolute Methane logo

Resolute Methane

Food, Water, & Land

Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design

Element Resources logo

Element Resources

Energy & Power

Developing large-scale green hydrogen projects

Florrent logo

Florrent

Food, Water, & Land

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

eSki Watercraft logo

eSki Watercraft

Energy & Power

Electric personal watercraft

Teal Bio logo

Teal Bio

Manufacturing & Processing

Reusable N95 respirator system for healthcare workers to reduce landfill waste

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

GigaDAC logo

GigaDAC

Energy & Power

Direct air capture optimized for gigaton scale

Swan Impact Network logo

Swan Impact Network

Infrastructure & Construction

Angel investor network focusing on supporting early-stage companies

SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

CLS Wind logo

CLS Wind

Energy & Power

Self-erecting system for installing wind turbines

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Upgraid RE logo

Upgraid RE

Infrastructure & Construction

AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals

Verde Technologies logo

Verde Technologies

Energy & Power

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

Titan Advanced Energy Solutions logo

Titan Advanced Energy Solutions

Energy & Power

Advanced battery management systems for lithium-ion batteries

Singularity Energy logo

Singularity Energy

Energy & Power

Data and software solutions for grid decarbonization

Carbon To Stone logo

Carbon To Stone

Energy & Power

Carbon-mineralization technology with high-value minerals and metals recovery

Phase Two Chemicals logo

Phase Two Chemicals

Manufacturing & Processing

Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage

Zero Homes logo

Zero Homes

Infrastructure & Construction

Automated assessment, design, and procurement platform for residential building retrofits

Cala Systems logo

Cala Systems

Energy & Power

Intelligent heat-pump water heaters

Mocean Energy logo

Mocean Energy

Energy & Power

Hybrid-offshore renewable power stations, combining wave, solar, and battery systems

Harmony Desalting logo

Harmony Desalting

Food, Water, & Land

Batch-process reverse osmosis for low-cost water desalination

AllSpice.io logo

AllSpice.io

Infrastructure & Construction

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

American Battery Technology Company logo

American Battery Technology Company

Energy & Power

Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company

Matterworks logo

Matterworks

Manufacturing & Processing

Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup

Datavedik logo

Datavedik

Energy & Power

Addressing complex optimization challenges in the energy industry

Rushnu logo

Rushnu

Manufacturing & Processing

Turns waste into carbon-neutral chemistry

GigaDAC logo

GigaDAC

Energy & Power

Direct air capture optimized for gigaton scale

Swan Impact Network logo

Swan Impact Network

Infrastructure & Construction

Angel investor network focusing on supporting early-stage companies

SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

CLS Wind logo

CLS Wind

Energy & Power

Self-erecting system for installing wind turbines

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Upgraid RE logo

Upgraid RE

Infrastructure & Construction

AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals

Verde Technologies logo

Verde Technologies

Energy & Power

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

Titan Advanced Energy Solutions logo

Titan Advanced Energy Solutions

Energy & Power

Advanced battery management systems for lithium-ion batteries

Singularity Energy logo

Singularity Energy

Energy & Power

Data and software solutions for grid decarbonization

Carbon To Stone logo

Carbon To Stone

Energy & Power

Carbon-mineralization technology with high-value minerals and metals recovery

Phase Two Chemicals logo

Phase Two Chemicals

Manufacturing & Processing

Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage

Zero Homes logo

Zero Homes

Infrastructure & Construction

Automated assessment, design, and procurement platform for residential building retrofits

Cala Systems logo

Cala Systems

Energy & Power

Intelligent heat-pump water heaters

Mocean Energy logo

Mocean Energy

Energy & Power

Hybrid-offshore renewable power stations, combining wave, solar, and battery systems

Harmony Desalting logo

Harmony Desalting

Food, Water, & Land

Batch-process reverse osmosis for low-cost water desalination

AllSpice.io logo

AllSpice.io

Infrastructure & Construction

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

American Battery Technology Company logo

American Battery Technology Company

Energy & Power

Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company

Matterworks logo

Matterworks

Manufacturing & Processing

Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup

Datavedik logo

Datavedik

Energy & Power

Addressing complex optimization challenges in the energy industry

Rushnu logo

Rushnu

Manufacturing & Processing

Turns waste into carbon-neutral chemistry

[ 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