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
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
GeoTeknica
Manufacturing & Processing
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
Rafi Properties
Infrastructure & Construction
SUPERGirls Shine Foundation
Energy & Power
Developing underserved girls in STEM to support equity in the emerging workforce
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
ETAK
ETAK transforms waste into clean energy. Our modular technology converts unsorted municipal and industrial waste into high-calorific gas, offering a decentralized, 24/7 alternative to fossil fuels and traditional incineration.
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
GeoTeknica
Manufacturing & Processing
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile
Rafi Properties
Infrastructure & Construction
SUPERGirls Shine Foundation
Energy & Power
Developing underserved girls in STEM to support equity in the emerging workforce
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
ETAK
ETAK transforms waste into clean energy. Our modular technology converts unsorted municipal and industrial waste into high-calorific gas, offering a decentralized, 24/7 alternative to fossil fuels and traditional incineration.
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Trellis Air
Infrastructure & Construction
Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
WISE ENERGIE
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety
BluBridge Energy Solutions
Energy & Power
Removing undesired elements from pre- and post-combustion gas streams
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Trellis Air
Infrastructure & Construction
Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
WISE ENERGIE
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety
BluBridge Energy Solutions
Energy & Power
Removing undesired elements from pre- and post-combustion gas streams
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
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.