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
Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Sheetak
Manufacturing & Processing
Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Gemini Energy
We are building the world first unified system for hydrogen compression and purification at 100% recovery rate and 99.999% purity.
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Solidec
Manufacturing & Processing
Converting carbon into chemicals using only air, water, and renewable electricity
10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety
Rafi Properties
Infrastructure & Construction
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Newfound Materials
Manufacturing & Processing
Predictive engine for materials R&D for new pathways to critical minerals
Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint
Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Sheetak
Manufacturing & Processing
Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Gemini Energy
We are building the world first unified system for hydrogen compression and purification at 100% recovery rate and 99.999% purity.
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Solidec
Manufacturing & Processing
Converting carbon into chemicals using only air, water, and renewable electricity
10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety
Rafi Properties
Infrastructure & Construction
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Newfound Materials
Manufacturing & Processing
Predictive engine for materials R&D for new pathways to critical minerals
Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments
Revterra
Energy & Power
Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging
SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Singularity Energy
Energy & Power
Data and software solutions for grid decarbonization
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
KVD
QED produces the world's brightest source of quantum light, addressing the two challenges facing quantum communications networks: range and cost.
Lasso Labs
Food, Water, & Land
Using natural proteins to create real texture in alternative foods
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
Intention
Energy & Power
Climate-infrastructure-investment platform
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments
Revterra
Energy & Power
Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging
SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Singularity Energy
Energy & Power
Data and software solutions for grid decarbonization
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
KVD
QED produces the world's brightest source of quantum light, addressing the two challenges facing quantum communications networks: range and cost.
Lasso Labs
Food, Water, & Land
Using natural proteins to create real texture in alternative foods
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
Intention
Energy & Power
Climate-infrastructure-investment platform
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
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.