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
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
3D Architech, Inc.
Manufacturing & Processing
Ultra-fine and gel-based metal manufacturing, creating high-efficiency microstructures for cooling and clean energy
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Diffraqtion
Energy & Power
AI cameras powering ultra high-resolution Earth and Space imaging
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
Onvector
Infrastructure & Construction
Non-chemical water treatment using plasma to rid water of PFAS and more
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
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.
Intention
Energy & Power
Climate-infrastructure-investment platform
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
3D Architech, Inc.
Manufacturing & Processing
Ultra-fine and gel-based metal manufacturing, creating high-efficiency microstructures for cooling and clean energy
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
Diffraqtion
Energy & Power
AI cameras powering ultra high-resolution Earth and Space imaging
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
Onvector
Infrastructure & Construction
Non-chemical water treatment using plasma to rid water of PFAS and more
MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
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.
Intention
Energy & Power
Climate-infrastructure-investment platform
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
GeoTeknica
Manufacturing & Processing
Adiabatic Materials
Manufacturing & Processing
Unlocking clean, affordable chemical production with electricity
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Dsider
Energy & Power
SaaS platform to accelerate the expansion of energy-transition projects
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
eSki Watercraft
Energy & Power
Electric personal watercraft
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
GeoTeknica
Manufacturing & Processing
Adiabatic Materials
Manufacturing & Processing
Unlocking clean, affordable chemical production with electricity
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Dsider
Energy & Power
SaaS platform to accelerate the expansion of energy-transition projects
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
eSki Watercraft
Energy & Power
Electric personal watercraft
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
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.