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
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Diffraqtion
Energy & Power
AI cameras powering ultra high-resolution Earth and Space imaging
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Atlas Robotics
Transportation & Logistics
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
PV Nano Cell
Energy & Power
Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
Ignition Packaging
About the Company Ignition Packaging is a biomaterials company developing scalable, cost-competitive alternatives to conventional petroleum-based foams. Ignition Packaging’s core technology transforms agricultural byproducts into a high-performance, biodegradable foam engineered […]
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
BETZ Group
Energy & Power
BETZ Group lead a global team of passionate professionals dedicated to advancing the development and adoption of innovative data technologies,remote sensing technologies and IT solutions in the fields of cleantech and critical infrastructure.
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Diffraqtion
Energy & Power
AI cameras powering ultra high-resolution Earth and Space imaging
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Atlas Robotics
Transportation & Logistics
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
PV Nano Cell
Energy & Power
Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
Ignition Packaging
About the Company Ignition Packaging is a biomaterials company developing scalable, cost-competitive alternatives to conventional petroleum-based foams. Ignition Packaging’s core technology transforms agricultural byproducts into a high-performance, biodegradable foam engineered […]
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
BETZ Group
Energy & Power
BETZ Group lead a global team of passionate professionals dedicated to advancing the development and adoption of innovative data technologies,remote sensing technologies and IT solutions in the fields of cleantech and critical infrastructure.
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
AgZen
Food, Water, & Land
AI that monitors leaf coverage during spraying to reduce pesticide usage
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
EQORE
EQORE is an end-to-end provider of intelligent and autonomous energy storage for commercial and industrial facilities, aimed at minimizing their electricity costs. By offering unprecedented ROIs, EQORE makes adding distributed storage to the grid financially attractive, promoting grid resilience while supporting businesses.
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
FLUIDXLAB Americas Inc.
Manufacturing & Processing
AI-powered microfluidic tools that help control and improve fluid processes across many industries
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
Cocoa Potash
Food, Water, & Land
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Loop CO2
Manufacturing & Processing
Transforming CO₂ into sustainable polymers to create fully recyclable materials
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
AgZen
Food, Water, & Land
AI that monitors leaf coverage during spraying to reduce pesticide usage
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
EQORE
EQORE is an end-to-end provider of intelligent and autonomous energy storage for commercial and industrial facilities, aimed at minimizing their electricity costs. By offering unprecedented ROIs, EQORE makes adding distributed storage to the grid financially attractive, promoting grid resilience while supporting businesses.
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
FLUIDXLAB Americas Inc.
Manufacturing & Processing
AI-powered microfluidic tools that help control and improve fluid processes across many industries
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
Cocoa Potash
Food, Water, & Land
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
Our Startups Have Raised Over $0B
All-time
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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.