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
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Elementa Partners
Infrastructure & Construction
Uniting global talent to unlock high-conviction, institutional-grade investments across Texas growth sectors
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Ententia
Energy & Power
Trusted, scalable enterprise AI solutions that turn context into competitive advantage
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Diffraqtion
Energy & Power
AI cameras powering ultra high-resolution Earth and Space imaging
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Thola
Energy & Power
On-demand marketplace for commercial building sustainability and safety management
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Elementa Partners
Infrastructure & Construction
Uniting global talent to unlock high-conviction, institutional-grade investments across Texas growth sectors
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Ententia
Energy & Power
Trusted, scalable enterprise AI solutions that turn context into competitive advantage
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Diffraqtion
Energy & Power
AI cameras powering ultra high-resolution Earth and Space imaging
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Thola
Energy & Power
On-demand marketplace for commercial building sustainability and safety management
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
Aramco Ventures (Member Account)
Energy & Power
Strategic technology-venturing program of Saudi Aramco
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Fluor Enterprises, Inc.
Energy & Power
Leading global engineering, procurement and construction (EPC) company
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
Aramco Ventures (Member Account)
Energy & Power
Strategic technology-venturing program of Saudi Aramco
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Fluor Enterprises, Inc.
Energy & Power
Leading global engineering, procurement and construction (EPC) company
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
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.