Helping climatetech startupsTransformindustry faster
Black Mountain Metals
Manufacturing & Processing
Black Mountain Metals is a global battery metals mining company, specifically focused on sustainable nickel and copper mining for lithium ion battery cathodes.
Criaterra
Micronic Technologies
Food, Water, & Land
Micronic Technologies — is a women co-founded and led, clean-tech company that is transforming industrial wastewater into high-value resources.
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Seabound
Transportation & Logistics
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Kornit Digital
Manufacturing & Processing
Kornit Digital (formerly Voxel8) — is developing digital manufacturing systems that revolutionize how footwear and athletic apparel are designed, manufactured, and delivered to consumers.
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
Desktop Health
Manufacturing & Processing
Desktop Health (formerly Beacon Bio) — is designing biodegradable and biomimetic tissue grafts using novel materials science and 3D printing technologies.
INpower
INpower — is a specialty insurance brokerage & risk management firm that knows that business innovation generates risk. Their risk management mission is simple: to provide their clients with deep insurance expertise, thoughtful enterprise risk management counsel, and fierce claims advocacy supported by offices in: Houston, Boston and Irvine, California.
energyGuard
Infrastructure & Construction
Corumat
Manufacturing & Processing
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Criterion Energy Partners
Energy & Power
Criterion Energy Partners — is an exploration and production company developing decentralized direct geothermal energy projects to help customers reduce emissions and improve operating efficiency using heat from the earth.
NBD Nano
Manufacturing & Processing
NBD Nano — utilizes biomimicry to create functional and durable surface coatings that improve water collection, transport, and repellency.
Circe Bioscience
Food, Water, & Land
Circe Industries circularizes industries with cellular factories.
Return To Vendor
Manufacturing & Processing
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Black Mountain Metals
Manufacturing & Processing
Black Mountain Metals is a global battery metals mining company, specifically focused on sustainable nickel and copper mining for lithium ion battery cathodes.
Criaterra
Micronic Technologies
Food, Water, & Land
Micronic Technologies — is a women co-founded and led, clean-tech company that is transforming industrial wastewater into high-value resources.
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Seabound
Transportation & Logistics
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Kornit Digital
Manufacturing & Processing
Kornit Digital (formerly Voxel8) — is developing digital manufacturing systems that revolutionize how footwear and athletic apparel are designed, manufactured, and delivered to consumers.
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
Desktop Health
Manufacturing & Processing
Desktop Health (formerly Beacon Bio) — is designing biodegradable and biomimetic tissue grafts using novel materials science and 3D printing technologies.
INpower
INpower — is a specialty insurance brokerage & risk management firm that knows that business innovation generates risk. Their risk management mission is simple: to provide their clients with deep insurance expertise, thoughtful enterprise risk management counsel, and fierce claims advocacy supported by offices in: Houston, Boston and Irvine, California.
energyGuard
Infrastructure & Construction
Corumat
Manufacturing & Processing
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Criterion Energy Partners
Energy & Power
Criterion Energy Partners — is an exploration and production company developing decentralized direct geothermal energy projects to help customers reduce emissions and improve operating efficiency using heat from the earth.
NBD Nano
Manufacturing & Processing
NBD Nano — utilizes biomimicry to create functional and durable surface coatings that improve water collection, transport, and repellency.
Circe Bioscience
Food, Water, & Land
Circe Industries circularizes industries with cellular factories.
Return To Vendor
Manufacturing & Processing
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Littoral Power Systems
Energy & Power
LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.
Solidec
Manufacturing & Processing
Using air, water, and electricity, Solidec generates the world's most essential chemicals, on-site and on-demand.
Energy Web Foundation
Energy & Power
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
Searover Robotics and Software
Manufacturing & Processing
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Earthbond
Energy & Power
Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.
Hempitecture
Manufacturing & Processing
Hempitecture (Ketchum, ID) is a manufacturer and distributor of biobased building materials, including their low embodied carbon insulation, HempWool®.
Wiggins Manufacturing & Logistics Consulting
Manufacturing & Processing
Help US manufacturers and supply chain companies design new facilities and Lean out existing ones.
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Prime Lightworks
Energy & Power
Prime Lightworks — makes breakthrough electric propulsion systems for space satellites that are solar-powered, fully renewable, and consume zero fuel. The company’s goal is to eliminate fuel emissions from space propulsion while drastically reducing cost and waste.
FGC Plasma Solutions
Energy & Power
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
CF Tech
Energy & Power
CF Technologies — are experts in Critical Fluid processes turning rancid restaurant and sewer trap grease into advanced renewable fuel.
Katz Water Technologies
Energy & Power
Katz Water Technologies — recycles their customers’ waste water instead of disposing it and sells the components as valuable materials.
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Littoral Power Systems
Energy & Power
LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.
Solidec
Manufacturing & Processing
Using air, water, and electricity, Solidec generates the world's most essential chemicals, on-site and on-demand.
Energy Web Foundation
Energy & Power
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
Searover Robotics and Software
Manufacturing & Processing
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Earthbond
Energy & Power
Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.
Hempitecture
Manufacturing & Processing
Hempitecture (Ketchum, ID) is a manufacturer and distributor of biobased building materials, including their low embodied carbon insulation, HempWool®.
Wiggins Manufacturing & Logistics Consulting
Manufacturing & Processing
Help US manufacturers and supply chain companies design new facilities and Lean out existing ones.
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Prime Lightworks
Energy & Power
Prime Lightworks — makes breakthrough electric propulsion systems for space satellites that are solar-powered, fully renewable, and consume zero fuel. The company’s goal is to eliminate fuel emissions from space propulsion while drastically reducing cost and waste.
FGC Plasma Solutions
Energy & Power
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
CF Tech
Energy & Power
CF Technologies — are experts in Critical Fluid processes turning rancid restaurant and sewer trap grease into advanced renewable fuel.
Katz Water Technologies
Energy & Power
Katz Water Technologies — recycles their customers’ waste water instead of disposing it and sells the components as valuable materials.
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
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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Currently home to
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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.