Helping climatetech startupsTransformindustry faster
ALLY Energy
Infrastructure & Construction
ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
Open Ocean Robotics
Energy & Power
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
MicroAvionics
Transportation & Logistics
Heliotrope Photonics
Energy & Power
Coating technology that enhances solar-panel performance by transforming wasted sunlight
Wise Energie
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
ClearTrace
Energy & Power
Product suite for traceable, end-to-end data management of electricity and certificate transactions
Bodhi
Energy & Power
Bodhi — cultivates the bond between people and the energy that powers their lives. The company’s software platform empowers solar companies to deliver amazing customer experiences with ease. Bodhi automates communication and personalizes the homeowners’ experience, so that installers can focus on what they do best – executing projects, making more sales, and transforming communities around energy.
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
KUBO Greenhouse Projects
Food, Water, & Land
Biosfera
Manufacturing & Processing
Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems
Armada AI
Altaeros
Energy & Power
Newfound Materials
Manufacturing & Processing
The synthesis design layer for making new materials.
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
ALLY Energy
Infrastructure & Construction
ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
Open Ocean Robotics
Energy & Power
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
MicroAvionics
Transportation & Logistics
Heliotrope Photonics
Energy & Power
Coating technology that enhances solar-panel performance by transforming wasted sunlight
Wise Energie
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
ClearTrace
Energy & Power
Product suite for traceable, end-to-end data management of electricity and certificate transactions
Bodhi
Energy & Power
Bodhi — cultivates the bond between people and the energy that powers their lives. The company’s software platform empowers solar companies to deliver amazing customer experiences with ease. Bodhi automates communication and personalizes the homeowners’ experience, so that installers can focus on what they do best – executing projects, making more sales, and transforming communities around energy.
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
KUBO Greenhouse Projects
Food, Water, & Land
Biosfera
Manufacturing & Processing
Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems
Armada AI
Altaeros
Energy & Power
Newfound Materials
Manufacturing & Processing
The synthesis design layer for making new materials.
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
EVLO Energy Storage
Energy & Power
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
Keystone Tower Systems
Energy & Power
WindRays Energy LLC
Energy & Power
WindRays Energy LLC — develops new models of wind energy designs to make widespread implementation in densely populated areas more efficient and profitable.
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
Appollo Wind Technologies
Infrastructure & Construction
CalWave Power Technologies
Energy & Power
CalWave — CalWave’s mission is to unlock the vast and steady carbon-free power from ocean waves, bringing superior power-generating technology to market with a global reach. CalWave’s proprietary wave energy converter technology achieves high performance while surviving storms and extreme conditions.
AeroNero
Food, Water, & Land
Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
eSki Watercraft
Energy & Power
Electric personal watercraft
Endeavor Composites
Manufacturing & Processing
Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
SiTration
Manufacturing & Processing
SiTration — is developing a novel membrane filtration technology that combines durability and performance at low cost to enable highly efficient separations in today’s mega-industries.
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
HyperKelp
Food, Water, & Land
HyperKelp — produces the Kelp Smart Buoy—a hosted payload platform capable of carrying hundreds of sensors—that collects and transmits marine-level data for wind farmers, climate scientists, and military intelligence officials.
Kuva Systems
Manufacturing & Processing
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Aeon Blue Technologies
Manufacturing & Processing
By matching chemical plant production with green variable power, ABT offers a solution that can boost profit margins by reducing electricity costs, making plants safer for employees and surrounding communities, and solving one of the most pressing challenges faced by the industrial sector: manufacturing without carbon. Aeon Blue aims for swift deployment of its advanced intermittency technology through licensing and EPC support with a fee and royalties model.
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
EVLO Energy Storage
Energy & Power
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
Keystone Tower Systems
Energy & Power
WindRays Energy LLC
Energy & Power
WindRays Energy LLC — develops new models of wind energy designs to make widespread implementation in densely populated areas more efficient and profitable.
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
Appollo Wind Technologies
Infrastructure & Construction
CalWave Power Technologies
Energy & Power
CalWave — CalWave’s mission is to unlock the vast and steady carbon-free power from ocean waves, bringing superior power-generating technology to market with a global reach. CalWave’s proprietary wave energy converter technology achieves high performance while surviving storms and extreme conditions.
AeroNero
Food, Water, & Land
Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
eSki Watercraft
Energy & Power
Electric personal watercraft
Endeavor Composites
Manufacturing & Processing
Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
SiTration
Manufacturing & Processing
SiTration — is developing a novel membrane filtration technology that combines durability and performance at low cost to enable highly efficient separations in today’s mega-industries.
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
HyperKelp
Food, Water, & Land
HyperKelp — produces the Kelp Smart Buoy—a hosted payload platform capable of carrying hundreds of sensors—that collects and transmits marine-level data for wind farmers, climate scientists, and military intelligence officials.
Kuva Systems
Manufacturing & Processing
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Aeon Blue Technologies
Manufacturing & Processing
By matching chemical plant production with green variable power, ABT offers a solution that can boost profit margins by reducing electricity costs, making plants safer for employees and surrounding communities, and solving one of the most pressing challenges faced by the industrial sector: manufacturing without carbon. Aeon Blue aims for swift deployment of its advanced intermittency technology through licensing and EPC support with a fee and royalties model.
Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen
The way the world makes energy, materials, and food is changing — and the next decade will decide whether that change makes life better: more energy with fewer emissions, more industry with cleaner air, more good jobs.
That future comes from entrepreneurs — the heroes who turn ideas into real products, real companies, and the jobs of the future. And the ones who make it are the ones with a community behind them.
For 15 years, Greentown has been that community — leaning in with the space, the people, the funding, and the first customers they need. Get behind the entrepreneurs building our future.
Our Startups Have Raised Over $0B
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Startups Operate
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New Jobs Created by Our Members, and Counting
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.
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Tap into deal flow with the world’s largest community of climate and energy startups.