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
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
Latitude Media
News, podcasts, market intelligence, and events for the climatetech industry
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
Dsider
Energy & Power
SaaS platform to accelerate the expansion of energy-transition projects
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
Torres Orbital Mining Inc (TOM)
Infrastructure & Construction
Autonomous lunar excavation systems for dust-free regolith mining and space operations
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
Latitude Media
News, podcasts, market intelligence, and events for the climatetech industry
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
Dsider
Energy & Power
SaaS platform to accelerate the expansion of energy-transition projects
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
Torres Orbital Mining Inc (TOM)
Infrastructure & Construction
Autonomous lunar excavation systems for dust-free regolith mining and space operations
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality
Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
Keysight Technologies (Member Account)
Manufacturing & Processing
World’s leading electronic measurement company
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Cellen
Transportation & Logistics
Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality
Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
Keysight Technologies (Member Account)
Manufacturing & Processing
World’s leading electronic measurement company
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Cellen
Transportation & Logistics
Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Our Startups Have Raised Over $0B
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Currently home to
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Countries Where
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.