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
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
TransOceans Clean Energy Risk, LLC
Energy & Power
Risk management solutions for global clean tech risk portfolios
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
Sensible
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
TransOceans Clean Energy Risk, LLC
Energy & Power
Risk management solutions for global clean tech risk portfolios
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
Sensible
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Nomadic Drones
Energy & Power
The first autonomos drone allowing continuous and relocatable high-voltage power line monitoring
10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Deep Anchor Solutions
Infrastructure & Construction
Anchoring solutions for floating applications including energy, aquaculture, and large-scale infrastructure
Singularity Energy
Energy & Power
Data and software solutions for grid decarbonization
SWERV
Infrastructure & Construction
Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Nomadic Drones
Energy & Power
The first autonomos drone allowing continuous and relocatable high-voltage power line monitoring
10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Deep Anchor Solutions
Infrastructure & Construction
Anchoring solutions for floating applications including energy, aquaculture, and large-scale infrastructure
Singularity Energy
Energy & Power
Data and software solutions for grid decarbonization
SWERV
Infrastructure & Construction
Making homes healthier, more comfortable, and more energy efficient through reimagined and easy to install ventilation
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
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.