Helping climatetech startupsTransformindustry faster
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
Circe Bioscience
Food, Water, & Land
Circe Industries circularizes industries with cellular factories.
Apitronics
Food, Water, & Land
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
ZS2 Technologies
Manufacturing & Processing
ZS2 Technologies (Calgary, AB) creates magnesium-based advanced building products that can store up to 20 wt.% CO2 from proprietary carbon capture technology.
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Conduit Tech
Infrastructure & Construction
Supporting HVAC contractors through design, sales, and installation
SeaSatellites
Transportation & Logistics
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
TerraFixing
Manufacturing & Processing
TerraFixing — develops a direct-air-capture technology for cold climates using zeolite-based adsorbent materials.
Focis AI
FocisAI uses AI and 3D scan data to automatically identify and map infrastructure in industrial facilities, turning complex environments into actionable digital intelligence. Our platform enables faster inspections, improved safety, and more efficient operations across heavy industry.
Circularise
Manufacturing & Processing
RailPod
Transportation & Logistics
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
Circe Bioscience
Food, Water, & Land
Circe Industries circularizes industries with cellular factories.
Apitronics
Food, Water, & Land
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
ZS2 Technologies
Manufacturing & Processing
ZS2 Technologies (Calgary, AB) creates magnesium-based advanced building products that can store up to 20 wt.% CO2 from proprietary carbon capture technology.
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Conduit Tech
Infrastructure & Construction
Supporting HVAC contractors through design, sales, and installation
SeaSatellites
Transportation & Logistics
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
TerraFixing
Manufacturing & Processing
TerraFixing — develops a direct-air-capture technology for cold climates using zeolite-based adsorbent materials.
Focis AI
FocisAI uses AI and 3D scan data to automatically identify and map infrastructure in industrial facilities, turning complex environments into actionable digital intelligence. Our platform enables faster inspections, improved safety, and more efficient operations across heavy industry.
Circularise
Manufacturing & Processing
RailPod
Transportation & Logistics
Metalmark Innovations
Transportation & Logistics
Beantrust
Food, Water, & Land
QD Solar
Energy & Power
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
ALGBIO
Manufacturing & Processing
ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.
Keystone Tower Systems
Energy & Power
Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
Nfinite Nanotech
Manufacturing & Processing
Agira
Energy & Power
Agira Photonics — designs optical films for superior light management. Applications requiring highly collimated light with minimal chromatic aberration, such as LED lighting and displays, can be made more efficient with Agira’s film technology.
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
SomEV
Energy & Power
SomEV — provides a wait-less charging network for light electric vehicles, using swappable batteries paired with a smart battery swap kiosk.
Mass Magnetics
Manufacturing & Processing
MECo specializes in the automated manufacture of structured functional materials for magnetic and electrochemical applications.
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
L3 Open Water Power
Energy & Power
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
GreenIRR
Transportation & Logistics
Arista Solutions
Giner Labs
Energy & Power
At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.
OhmConnect
Energy & Power
OhmConnect improve the lives of people and the health of the planet by reimagining the way we (collectively) use energy.
Metalmark Innovations
Transportation & Logistics
Beantrust
Food, Water, & Land
QD Solar
Energy & Power
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
ALGBIO
Manufacturing & Processing
ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.
Keystone Tower Systems
Energy & Power
Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
Nfinite Nanotech
Manufacturing & Processing
Agira
Energy & Power
Agira Photonics — designs optical films for superior light management. Applications requiring highly collimated light with minimal chromatic aberration, such as LED lighting and displays, can be made more efficient with Agira’s film technology.
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
SomEV
Energy & Power
SomEV — provides a wait-less charging network for light electric vehicles, using swappable batteries paired with a smart battery swap kiosk.
Mass Magnetics
Manufacturing & Processing
MECo specializes in the automated manufacture of structured functional materials for magnetic and electrochemical applications.
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
L3 Open Water Power
Energy & Power
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
GreenIRR
Transportation & Logistics
Arista Solutions
Giner Labs
Energy & Power
At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.
OhmConnect
Energy & Power
OhmConnect improve the lives of people and the health of the planet by reimagining the way we (collectively) use energy.
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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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.
Explore Investing
Tap into deal flow with the world’s largest community of climate and energy startups.