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
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
AgZen
Food, Water, & Land
AI that monitors leaf coverage during spraying to reduce pesticide usage
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
FLUIDXLAB Americas Inc.
Manufacturing & Processing
AI-powered microfluidic tools that help control and improve fluid processes across many industries
Nomadic Drones
Energy & Power
The first autonomos drone allowing continuous and relocatable high-voltage power line monitoring
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
Raptor Maps
Energy & Power
AI software to increase solar farm power production, reduce operational risk, and lower costs
Cellen
Transportation & Logistics
Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
AgZen
Food, Water, & Land
AI that monitors leaf coverage during spraying to reduce pesticide usage
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
FLUIDXLAB Americas Inc.
Manufacturing & Processing
AI-powered microfluidic tools that help control and improve fluid processes across many industries
Nomadic Drones
Energy & Power
The first autonomos drone allowing continuous and relocatable high-voltage power line monitoring
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
Raptor Maps
Energy & Power
AI software to increase solar farm power production, reduce operational risk, and lower costs
Cellen
Transportation & Logistics
Hydrogen-powered drones, combining UAV technology with hydrogen refueling solutions
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Provocative
Manufacturing & Processing
Replacing data centers’ cooling systems with carbon capture
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
TransOceans Clean Energy Risk, LLC
Energy & Power
Risk management solutions for global clean tech risk portfolios
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Provocative
Manufacturing & Processing
Replacing data centers’ cooling systems with carbon capture
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
TransOceans Clean Energy Risk, LLC
Energy & Power
Risk management solutions for global clean tech risk portfolios
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
Our Startups Have Raised Over $0B
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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.