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
Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
PV Nano Cell
Energy & Power
Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Upgraid RE
Infrastructure & Construction
AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals
Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
PV Nano Cell
Energy & Power
Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Upgraid RE
Infrastructure & Construction
AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals
Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
GeoTeknica
Manufacturing & Processing
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Circulus Air
Infrastructure & Construction
Clean air systems to directly remove harmful gases and pollutants
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
Keysight Technologies (Member Account)
Manufacturing & Processing
World’s leading electronic measurement company
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Harmony Desalting
Food, Water, & Land
Batch-process reverse osmosis for low-cost water desalination
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
GeoTeknica
Manufacturing & Processing
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Circulus Air
Infrastructure & Construction
Clean air systems to directly remove harmful gases and pollutants
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
Keysight Technologies (Member Account)
Manufacturing & Processing
World’s leading electronic measurement company
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
InnoEnergy (Member Account)
Energy & Power
Industrializing cleantech innovation to enable and grow a global net-zero economy
Harmony Desalting
Food, Water, & Land
Batch-process reverse osmosis for low-cost water desalination
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
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.