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
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
Orien Energy
Infrastructure & Construction
Sorption heat pump to recover waste heat from dryer exhaust
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
AgZen
Food, Water, & Land
AI that monitors leaf coverage during spraying to reduce pesticide usage
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Solidec
Manufacturing & Processing
Converting carbon into chemicals using only air, water, and renewable electricity
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
Orien Energy
Infrastructure & Construction
Sorption heat pump to recover waste heat from dryer exhaust
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
AgZen
Food, Water, & Land
AI that monitors leaf coverage during spraying to reduce pesticide usage
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Solidec
Manufacturing & Processing
Converting carbon into chemicals using only air, water, and renewable electricity
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Aramco Ventures (Member Account)
Energy & Power
Strategic technology-venturing program of Saudi Aramco
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Janta Power
Energy & Power
The world’s first 3D solar tower technology
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Aramco Ventures (Member Account)
Energy & Power
Strategic technology-venturing program of Saudi Aramco
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Janta Power
Energy & Power
The world’s first 3D solar tower technology
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Our Startups Have Raised Over $0B
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Currently home to
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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.