Helping entrepreneursTransformindustry faster
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.
Greentown is a 501(c)(3) non-profit organization
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
Upgraid RE
Infrastructure & Construction
AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
Elementium Materials
Energy & Power
Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
Julius Education
Infrastructure & Construction
Helping green organizations manage the changing workforce through an experience platform for job-seekers
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
Upgraid RE
Infrastructure & Construction
AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
Elementium Materials
Energy & Power
Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
Julius Education
Infrastructure & Construction
Helping green organizations manage the changing workforce through an experience platform for job-seekers
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
ATOM-X
Energy & Power
Transforming CO₂ into sustainable fuels like green methanol
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Thalon Materials
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
ATOM-X
Energy & Power
Transforming CO₂ into sustainable fuels like green methanol
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Thalon Materials
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Our Startups Have Raised Over $0B
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Startups Operate
12,915 new jobs created by our members, and counting
Boston
7,492
Houston
5,423
Startups bring the breakthroughs. Corporate partners bring the scale, infrastructure, expertise, and capital to make them matter.
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.
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.
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.
Learn About our Programs
In addition to our Boston and Houston incubators, Greentown runs programs designed to address critical challenges in the climatetech ecosystem.