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
Candid Intelligence logo

Candid Intelligence

Infrastructure & Construction

Accelerating pre-construction engineering with Agentic AI

HKG Energy logo

HKG Energy

Energy & Power

Silicon materials that increase battery energy density

Studio 3e8 logo

Studio 3e8

Manufacturing & Processing

Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use

Keysight Technologies (Member Account) logo

Keysight Technologies (Member Account)

Manufacturing & Processing

World’s leading electronic measurement company

Wootz logo

Wootz

Manufacturing & Processing

Carbon nanotube supermaterials to replace or augment traditional metallic conductors

FLUIDXLAB Americas Inc. logo

FLUIDXLAB Americas Inc.

Manufacturing & Processing

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

eSki Watercraft logo

eSki Watercraft

Energy & Power

Electric personal watercraft

Biospheric AI logo

Biospheric AI

Energy & Power

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

Rotorvault logo

Rotorvault

Energy & Power

Energy-storage and load-following solutions for grid-scale and commercial applications

SpiralWave logo

SpiralWave

Manufacturing & Processing

Low-cost, scalable, high-quality carbon removal using novel electrochemistry

AeroShield Materials logo

AeroShield Materials

Infrastructure & Construction

Insulating, porous aerogels for energy-efficient windows

Nth Cycle logo

Nth Cycle

Manufacturing & Processing

Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

Steven Winter Associates, Inc. logo

Steven Winter Associates, Inc.

Infrastructure & Construction

Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments

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

Glimpse Engineering logo

Glimpse Engineering

Manufacturing & Processing

Visualizing battery scans and continuously monitoring key battery-design features

NeuraliX logo

NeuraliX

Energy & Power

AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors

Capital Energy logo

Capital Energy

Energy & Power

Helping climatetech companies translate complex work into compelling brands

Florrent logo

Florrent

Food, Water, & Land

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

Candid Intelligence logo

Candid Intelligence

Infrastructure & Construction

Accelerating pre-construction engineering with Agentic AI

HKG Energy logo

HKG Energy

Energy & Power

Silicon materials that increase battery energy density

Studio 3e8 logo

Studio 3e8

Manufacturing & Processing

Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use

Keysight Technologies (Member Account) logo

Keysight Technologies (Member Account)

Manufacturing & Processing

World’s leading electronic measurement company

Wootz logo

Wootz

Manufacturing & Processing

Carbon nanotube supermaterials to replace or augment traditional metallic conductors

FLUIDXLAB Americas Inc. logo

FLUIDXLAB Americas Inc.

Manufacturing & Processing

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

eSki Watercraft logo

eSki Watercraft

Energy & Power

Electric personal watercraft

Biospheric AI logo

Biospheric AI

Energy & Power

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

Rotorvault logo

Rotorvault

Energy & Power

Energy-storage and load-following solutions for grid-scale and commercial applications

SpiralWave logo

SpiralWave

Manufacturing & Processing

Low-cost, scalable, high-quality carbon removal using novel electrochemistry

AeroShield Materials logo

AeroShield Materials

Infrastructure & Construction

Insulating, porous aerogels for energy-efficient windows

Nth Cycle logo

Nth Cycle

Manufacturing & Processing

Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings

HEXAspec logo

HEXAspec

Energy & Power

Thermal management solutions for semiconductor chips, enabling more powerful hardware

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

Steven Winter Associates, Inc. logo

Steven Winter Associates, Inc.

Infrastructure & Construction

Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments

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

Glimpse Engineering logo

Glimpse Engineering

Manufacturing & Processing

Visualizing battery scans and continuously monitoring key battery-design features

NeuraliX logo

NeuraliX

Energy & Power

AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors

Capital Energy logo

Capital Energy

Energy & Power

Helping climatetech companies translate complex work into compelling brands

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

Alma Energy logo

Alma Energy

Energy & Power

Geothermal exploration to deliver scaled renewable energy production at economic levels

rStream Recycling LLC logo

rStream Recycling LLC

Manufacturing & Processing

Autonomous waste-sorting system for non-industrial settings with critical waste volumes

BluBridge Energy Solutions logo

BluBridge Energy Solutions

Energy & Power

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

Packwise logo

Packwise

Manufacturing & Processing

IIoT sensors combined with a software and analytics platform to optimize industrial supply chains

Cellen logo

Cellen

Transportation & Logistics

Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions

Geokiln Energy Innovation logo

Geokiln Energy Innovation

Energy & Power

Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions

BiaTech Corporation logo

BiaTech Corporation

Energy & Power

Energy and natural resource infrastructure immersion with AI-enabled edge and cloud technology

Phase Two Chemicals logo

Phase Two Chemicals

Manufacturing & Processing

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

3D Architech, Inc. logo

3D Architech, Inc.

Manufacturing & Processing

Ultra-fine and gel-based metal manufacturing, creating high-efficiency microstructures for cooling and clean energy

MoveEV logo

MoveEV

Transportation & Logistics

Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees

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

String Data Motion logo

String Data Motion

Infrastructure & Construction

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

Rafi Properties logo

Rafi Properties

Infrastructure & Construction

PlaSene logo

PlaSene

Manufacturing & Processing

Converting plastic waste into liquid fuel and low-carbon hydrogen

EnergyGigs logo

EnergyGigs

Food, Water, & Land

Talent and freelance platform for the energy industry

Circulus Air logo

Circulus Air

Infrastructure & Construction

Clean air systems to directly remove harmful gases and pollutants

Verdicity logo

Verdicity

Infrastructure & Construction

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

PooPoof Inc logo

PooPoof Inc

Food, Water, & Land

The world’s first pocket-sized bioreactor

Verde Technologies logo

Verde Technologies

Energy & Power

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

Laminar logo

Laminar

Manufacturing & Processing

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

Alma Energy logo

Alma Energy

Energy & Power

Geothermal exploration to deliver scaled renewable energy production at economic levels

rStream Recycling LLC logo

rStream Recycling LLC

Manufacturing & Processing

Autonomous waste-sorting system for non-industrial settings with critical waste volumes

BluBridge Energy Solutions logo

BluBridge Energy Solutions

Energy & Power

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

Packwise logo

Packwise

Manufacturing & Processing

IIoT sensors combined with a software and analytics platform to optimize industrial supply chains

Cellen logo

Cellen

Transportation & Logistics

Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions

Geokiln Energy Innovation logo

Geokiln Energy Innovation

Energy & Power

Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions

BiaTech Corporation logo

BiaTech Corporation

Energy & Power

Energy and natural resource infrastructure immersion with AI-enabled edge and cloud technology

Phase Two Chemicals logo

Phase Two Chemicals

Manufacturing & Processing

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

3D Architech, Inc. logo

3D Architech, Inc.

Manufacturing & Processing

Ultra-fine and gel-based metal manufacturing, creating high-efficiency microstructures for cooling and clean energy

MoveEV logo

MoveEV

Transportation & Logistics

Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees

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

String Data Motion logo

String Data Motion

Infrastructure & Construction

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

Rafi Properties logo

Rafi Properties

Infrastructure & Construction

PlaSene logo

PlaSene

Manufacturing & Processing

Converting plastic waste into liquid fuel and low-carbon hydrogen

EnergyGigs logo

EnergyGigs

Food, Water, & Land

Talent and freelance platform for the energy industry

Circulus Air logo

Circulus Air

Infrastructure & Construction

Clean air systems to directly remove harmful gases and pollutants

Verdicity logo

Verdicity

Infrastructure & Construction

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

PooPoof Inc logo

PooPoof Inc

Food, Water, & Land

The world’s first pocket-sized bioreactor

Verde Technologies logo

Verde Technologies

Energy & Power

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

[ 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