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
Raptor Maps logo

Raptor Maps

Energy & Power

AI software to increase solar farm power production, reduce operational risk, and lower costs

Kausalyze logo

Kausalyze

Manufacturing & Processing

True root-cause analysis for chemicals, energy, and pharmaceutical companies

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Biosimo logo

Biosimo

Manufacturing & Processing

Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process

KP Labs logo

KP Labs

Manufacturing & Processing

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

MCatalysis logo

MCatalysis

Manufacturing & Processing

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

SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

QuantAQ logo

QuantAQ

Infrastructure & Construction

Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design

HarvestAi logo

HarvestAi

Food, Water, & Land

Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning

RIVSAL HOLDINGS INC. logo

RIVSAL HOLDINGS INC.

Energy & Power

Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility

Timbergrove logo

Timbergrove

Energy & Power

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

Conduit Tech logo

Conduit Tech

Infrastructure & Construction

Supporting HVAC contractors through design, sales, and installation

AllSpice.io logo

AllSpice.io

Infrastructure & Construction

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

AmHyTech logo

AmHyTech

Energy & Power

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

Alma Energy logo

Alma Energy

Energy & Power

Geothermal exploration to deliver scaled renewable energy production at economic levels

Phlair logo

Phlair

Manufacturing & Processing

Renewable-energy-powered DAC system using an electrochemical process for acid and base generation

Geokiln Energy Innovation logo

Geokiln Energy Innovation

Energy & Power

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

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.

BlueShift Carbon logo

BlueShift Carbon

Manufacturing & Processing

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

Highland Park Technologies logo

Highland Park Technologies

Infrastructure & Construction

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

Raptor Maps logo

Raptor Maps

Energy & Power

AI software to increase solar farm power production, reduce operational risk, and lower costs

Kausalyze logo

Kausalyze

Manufacturing & Processing

True root-cause analysis for chemicals, energy, and pharmaceutical companies

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Biosimo logo

Biosimo

Manufacturing & Processing

Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process

KP Labs logo

KP Labs

Manufacturing & Processing

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

MCatalysis logo

MCatalysis

Manufacturing & Processing

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

SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

QuantAQ logo

QuantAQ

Infrastructure & Construction

Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design

HarvestAi logo

HarvestAi

Food, Water, & Land

Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning

RIVSAL HOLDINGS INC. logo

RIVSAL HOLDINGS INC.

Energy & Power

Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility

Timbergrove logo

Timbergrove

Energy & Power

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

Conduit Tech logo

Conduit Tech

Infrastructure & Construction

Supporting HVAC contractors through design, sales, and installation

AllSpice.io logo

AllSpice.io

Infrastructure & Construction

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

AmHyTech logo

AmHyTech

Energy & Power

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

Alma Energy logo

Alma Energy

Energy & Power

Geothermal exploration to deliver scaled renewable energy production at economic levels

Phlair logo

Phlair

Manufacturing & Processing

Renewable-energy-powered DAC system using an electrochemical process for acid and base generation

Geokiln Energy Innovation logo

Geokiln Energy Innovation

Energy & Power

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

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.

BlueShift Carbon logo

BlueShift Carbon

Manufacturing & Processing

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

Highland Park Technologies logo

Highland Park Technologies

Infrastructure & Construction

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

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

Thalon Materials logo

Thalon Materials

SRECTrade logo

SRECTrade

Energy & Power

Management and transaction platform for environmental commodities to reduce costs and increase transparency

Resollant logo

Resollant

Manufacturing & Processing

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

Glimpse Engineering logo

Glimpse Engineering

Manufacturing & Processing

Visualizing battery scans and continuously monitoring key battery-design features

Catalyxx logo

Catalyxx

Manufacturing & Processing

Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Circular Materials logo

Circular Materials

Manufacturing & Processing

Critical raw materials from industrial wastewater

NeuroBionics logo

NeuroBionics

Manufacturing & Processing

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

Pike Robotics logo

Pike Robotics

Energy & Power

Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces

Haffner Energy logo

Haffner Energy

Energy & Power

Producing renewable energy via waste-biomass thermolysis

Mission Zero Technologies logo

Mission Zero Technologies

Manufacturing & Processing

Efficient electrochemistry to capture CO₂

NewGrid logo

NewGrid

Energy & Power

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

Janta Power logo

Janta Power

Energy & Power

The world’s first 3D solar tower technology

Ignition Packaging logo

Ignition Packaging

About the Company Ignition Packaging is a biomaterials company developing scalable, cost-competitive alternatives to conventional petroleum-based foams. Ignition Packaging’s core technology transforms agricultural byproducts into a high-performance, biodegradable foam engineered […]

Revterra logo

Revterra

Energy & Power

Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Elemental Advanced Materials logo

Elemental Advanced Materials

Manufacturing & Processing

Graphene and hydrogen from mixed and contaminated waste plastics and other organic materials

Octavia Carbon Co logo

Octavia Carbon Co

Manufacturing & Processing

Geothermal heat to capture and mineralize CO₂

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

Gaia AI logo

Gaia AI

Food, Water, & Land

Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision

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

Thalon Materials logo

Thalon Materials

SRECTrade logo

SRECTrade

Energy & Power

Management and transaction platform for environmental commodities to reduce costs and increase transparency

Resollant logo

Resollant

Manufacturing & Processing

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

Glimpse Engineering logo

Glimpse Engineering

Manufacturing & Processing

Visualizing battery scans and continuously monitoring key battery-design features

Catalyxx logo

Catalyxx

Manufacturing & Processing

Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Circular Materials logo

Circular Materials

Manufacturing & Processing

Critical raw materials from industrial wastewater

NeuroBionics logo

NeuroBionics

Manufacturing & Processing

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

Pike Robotics logo

Pike Robotics

Energy & Power

Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces

Haffner Energy logo

Haffner Energy

Energy & Power

Producing renewable energy via waste-biomass thermolysis

Mission Zero Technologies logo

Mission Zero Technologies

Manufacturing & Processing

Efficient electrochemistry to capture CO₂

NewGrid logo

NewGrid

Energy & Power

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

Janta Power logo

Janta Power

Energy & Power

The world’s first 3D solar tower technology

Ignition Packaging logo

Ignition Packaging

About the Company Ignition Packaging is a biomaterials company developing scalable, cost-competitive alternatives to conventional petroleum-based foams. Ignition Packaging’s core technology transforms agricultural byproducts into a high-performance, biodegradable foam engineered […]

Revterra logo

Revterra

Energy & Power

Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging

Massachusetts Materials Technologies logo

Massachusetts Materials Technologies

Energy & Power

Seamlessly measuring the mechanical properties of pipelines without interruption

Elemental Advanced Materials logo

Elemental Advanced Materials

Manufacturing & Processing

Graphene and hydrogen from mixed and contaminated waste plastics and other organic materials

Octavia Carbon Co logo

Octavia Carbon Co

Manufacturing & Processing

Geothermal heat to capture and mineralize CO₂

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

Gaia AI logo

Gaia AI

Food, Water, & Land

Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision

[ 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