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
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
TDS Select
Food, Water, & Land
Modular, scalable FCDI system capable of desalinating brackish water using low energy
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Adept Materials
Infrastructure & Construction
Material innovations that improve moisture regulation, comfort, and energy efficiency
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
rStream Recycling LLC
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
TDS Select
Food, Water, & Land
Modular, scalable FCDI system capable of desalinating brackish water using low energy
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Adept Materials
Infrastructure & Construction
Material innovations that improve moisture regulation, comfort, and energy efficiency
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
rStream Recycling LLC
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation
Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation
Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
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.