Transforming industry

We support climatetech startups working on innovations to transform our key industrial and energy systems for a sustainable future.

Membership Benefits
Greentown member explaining a prototype to a partner
[ 01 ]Who We Are

We're big believers in the power of entrepreneurship.

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

But 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.

[ 03 ]Our Startups

Our Member Companies

View All Startups
Clarity Castle logo

Clarity Castle

Infrastructure & Construction

Modular, soundproof work pods made from recycled materials

Fluor Enterprises, Inc. logo

Fluor Enterprises, Inc.

Energy & Power

Leading global engineering, procurement and construction (EPC) company

Andros Innovations logo

Andros Innovations

Manufacturing & Processing

Reducing the costs and energy demands of ammonia production through advanced reactor technology

Haffner Energy logo

Haffner Energy

Energy & Power

Producing renewable energy via waste-biomass thermolysis

Vertical Semiconductor logo

Vertical Semiconductor

Energy & Power

Power supply units designed to unleash the full potential of AI & HPC

Enel (Member Account) logo

Enel (Member Account)

Energy & Power

One of the world’s leading integrated utilities and the largest private producer of clean energy

Nebumi logo

Nebumi

Energy & Power

Emissions intelligence platform, monitoring pollution with satellite data and AI

Manatee Energy logo

Manatee Energy

Infrastructure & Construction

Rigorous and automated system design for affordable home heat pumps

Wootz logo

Wootz

Manufacturing & Processing

Carbon nanotube supermaterials to replace or augment traditional metallic conductors

A&I Power Group logo

A&I Power Group

Energy & Power

Electricity-generation systems that convert electromagnetic energy into electrical potential

Priority Investor Loans logo

Priority Investor Loans

Infrastructure & Construction

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

Form Energy logo

Form Energy

Energy & Power

Cost-effective, multi-day energy-storage solutions

KP Labs logo

KP Labs

Manufacturing & Processing

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

Resollant logo

Resollant

Manufacturing & Processing

Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale

Kanin Energy logo

Kanin Energy

Energy & Power

Monetizing industrial waste heat with reduced deployment risk via third-party financing

Highland Park Technologies logo

Highland Park Technologies

Infrastructure & Construction

Insulated cladding and building envelope retrofits at a fraction of the cost

Optigon logo

Optigon

Energy & Power

Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication

ONEPREDICT logo

ONEPREDICT

Manufacturing & Processing

Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries

Ecobrew logo

Ecobrew

Food, Water, & Land

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

Verdicity logo

Verdicity

Infrastructure & Construction

AI-enabled, customizable smart building, information, and facility services for building vendors

Clarity Castle logo

Clarity Castle

Infrastructure & Construction

Modular, soundproof work pods made from recycled materials

Fluor Enterprises, Inc. logo

Fluor Enterprises, Inc.

Energy & Power

Leading global engineering, procurement and construction (EPC) company

Andros Innovations logo

Andros Innovations

Manufacturing & Processing

Reducing the costs and energy demands of ammonia production through advanced reactor technology

Haffner Energy logo

Haffner Energy

Energy & Power

Producing renewable energy via waste-biomass thermolysis

Vertical Semiconductor logo

Vertical Semiconductor

Energy & Power

Power supply units designed to unleash the full potential of AI & HPC

Enel (Member Account) logo

Enel (Member Account)

Energy & Power

One of the world’s leading integrated utilities and the largest private producer of clean energy

Nebumi logo

Nebumi

Energy & Power

Emissions intelligence platform, monitoring pollution with satellite data and AI

Manatee Energy logo

Manatee Energy

Infrastructure & Construction

Rigorous and automated system design for affordable home heat pumps

Wootz logo

Wootz

Manufacturing & Processing

Carbon nanotube supermaterials to replace or augment traditional metallic conductors

A&I Power Group logo

A&I Power Group

Energy & Power

Electricity-generation systems that convert electromagnetic energy into electrical potential

Priority Investor Loans logo

Priority Investor Loans

Infrastructure & Construction

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

Form Energy logo

Form Energy

Energy & Power

Cost-effective, multi-day energy-storage solutions

KP Labs logo

KP Labs

Manufacturing & Processing

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

Resollant logo

Resollant

Manufacturing & Processing

Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale

Kanin Energy logo

Kanin Energy

Energy & Power

Monetizing industrial waste heat with reduced deployment risk via third-party financing

Highland Park Technologies logo

Highland Park Technologies

Infrastructure & Construction

Insulated cladding and building envelope retrofits at a fraction of the cost

Optigon logo

Optigon

Energy & Power

Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication

ONEPREDICT logo

ONEPREDICT

Manufacturing & Processing

Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries

Ecobrew logo

Ecobrew

Food, Water, & Land

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

Verdicity logo

Verdicity

Infrastructure & Construction

AI-enabled, customizable smart building, information, and facility services for building vendors

Anning Corporation logo

Anning Corporation

Energy & Power

Targeting iron-rich rocks to produce hydrogen

Dottir Labs logo

Dottir Labs

Food, Water, & Land

Sensor technology that provides real-time, detailed chemical analysis of water

Fleet Robotics logo

Fleet Robotics

Transportation & Logistics

Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships

Clean Crop Technologies logo

Clean Crop Technologies

Food, Water, & Land

Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity

Verde Technologies logo

Verde Technologies

Energy & Power

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

BluBridge Energy Solutions logo

BluBridge Energy Solutions

Energy & Power

Removing undesired elements from pre- and post-combustion gas streams

NewGrid logo

NewGrid

Energy & Power

Software and services to enable system operators, utilities, and power market participants to reduce grid congestion

LiftOFF Technology logo

LiftOFF Technology

Energy & Power

Batteries with breakthrough energy density and safety

Solar Materials logo

Solar Materials

Energy & Power

Recovered and recycled secondary solar panel materials

Boxes logo

Boxes

Manufacturing & Processing

Smart, affordable, and sustainable retail combining the physical and digital worlds

Clear Sky Innovations logo

Clear Sky Innovations

Manufacturing & Processing

A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Carbon To Stone logo

Carbon To Stone

Energy & Power

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

Turnover Labs logo

Turnover Labs

Manufacturing & Processing

Modular electrolyzers converting dirty onsite CO₂ into basic chemicals

WISE ENERGIE logo

WISE ENERGIE

Energy & Power

Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power

Julius Education logo

Julius Education

Infrastructure & Construction

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

MCatalysis logo

MCatalysis

Manufacturing & Processing

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

Capital Energy logo

Capital Energy

Energy & Power

Helping climatetech companies translate complex work into compelling brands

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

FlowCellutions logo

FlowCellutions

Energy & Power

Preventing power outages and improving cost savings for critical battery systems

Anning Corporation logo

Anning Corporation

Energy & Power

Targeting iron-rich rocks to produce hydrogen

Dottir Labs logo

Dottir Labs

Food, Water, & Land

Sensor technology that provides real-time, detailed chemical analysis of water

Fleet Robotics logo

Fleet Robotics

Transportation & Logistics

Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships

Clean Crop Technologies logo

Clean Crop Technologies

Food, Water, & Land

Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity

Verde Technologies logo

Verde Technologies

Energy & Power

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

BluBridge Energy Solutions logo

BluBridge Energy Solutions

Energy & Power

Removing undesired elements from pre- and post-combustion gas streams

NewGrid logo

NewGrid

Energy & Power

Software and services to enable system operators, utilities, and power market participants to reduce grid congestion

LiftOFF Technology logo

LiftOFF Technology

Energy & Power

Batteries with breakthrough energy density and safety

Solar Materials logo

Solar Materials

Energy & Power

Recovered and recycled secondary solar panel materials

Boxes logo

Boxes

Manufacturing & Processing

Smart, affordable, and sustainable retail combining the physical and digital worlds

Clear Sky Innovations logo

Clear Sky Innovations

Manufacturing & Processing

A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Carbon To Stone logo

Carbon To Stone

Energy & Power

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

Turnover Labs logo

Turnover Labs

Manufacturing & Processing

Modular electrolyzers converting dirty onsite CO₂ into basic chemicals

WISE ENERGIE logo

WISE ENERGIE

Energy & Power

Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power

Julius Education logo

Julius Education

Infrastructure & Construction

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

MCatalysis logo

MCatalysis

Manufacturing & Processing

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

Capital Energy logo

Capital Energy

Energy & Power

Helping climatetech companies translate complex work into compelling brands

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

FlowCellutions logo

FlowCellutions

Energy & Power

Preventing power outages and improving cost savings for critical battery systems

[ 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