Helping climate & energy startupsTransformindustries faster
KUBO Greenhouse Projects
Food, Water, & Land
Making sustainable growing accessible with CO₂-negative, smart energy solutions
Terrapin Geothermics
Energy & Power
Geothermal energy systems that convert subsurface heat into emission-free power for industrial operations
Loop CO2
Manufacturing & Processing
Converting CO2 into cosmetic oils, adhesives, and thermoplastic elastomers for sustainable manufacturing
Circular Materials
Manufacturing & Processing
Supercritical water precipitation recovers critical metals from industrial wastewater while eliminating toxic sludge
Accion Systems
Transportation & Logistics
Ion thrusters for precise satellite maneuvering and orbit control
Planckton Data
Manufacturing & Processing
Platform automating carbon data collection and management for net zero decisions
GreenLIB
Manufacturing & Processing
Recycling lithium-ion batteries with water leaching and electrowinning separation
Noteworthy AI
Energy & Power
Edge-mounted computer vision inspects distribution grid assets from utility fleet vehicles
Skytree
Food, Water, & Land
Modular direct air capture that extracts CO₂ and water for reuse in fuels, chemicals, and agriculture
JURA Bio
Food, Water, & Land
Curative, definitive, cell-based therapies for autoimmune diseases housed in a novel therapeutic platform
Salient Predictions
Food, Water, & Land
Machine learning models using ocean data to generate extended-range weather forecasts for temperature and precipitation
Glimpse Engineering
Manufacturing & Processing
Computed tomography scanning and software that visualize battery design features and quality throughout production
CalWave Power Technologies
Energy & Power
Wave energy converter technology that harnesses ocean waves for carbon-free power generation
Altitude
Product design and engineering firm helping companies develop new physical products and services
WattSto Energy
Energy & Power
Long-duration vanadium redox flow batteries paired with lithium systems for grid and microgrid storage
Ranger Solar
Energy & Power
Bringing new utility-scale renewable energy projects throughout the United States
Agrilab Technologies Inc.
Food, Water, & Land
Compost aeration and heat capture systems that accelerate organic waste conversion to fertilizer
Searover Robotics and Software
Manufacturing & Processing
AI, IoT, and robotics solutions for maintenance and health monitoring of energy and underwater assets
Starfield
Food, Water, & Land
Plant-based meat made with unique techniques
BluBridge Energy Solutions
Energy & Power
Gas stream purification systems that remove impurities to enable cleaner fossil fuel combustion on-site
KUBO Greenhouse Projects
Food, Water, & Land
Making sustainable growing accessible with CO₂-negative, smart energy solutions
Terrapin Geothermics
Energy & Power
Geothermal energy systems that convert subsurface heat into emission-free power for industrial operations
Loop CO2
Manufacturing & Processing
Converting CO2 into cosmetic oils, adhesives, and thermoplastic elastomers for sustainable manufacturing
Circular Materials
Manufacturing & Processing
Supercritical water precipitation recovers critical metals from industrial wastewater while eliminating toxic sludge
Accion Systems
Transportation & Logistics
Ion thrusters for precise satellite maneuvering and orbit control
Planckton Data
Manufacturing & Processing
Platform automating carbon data collection and management for net zero decisions
GreenLIB
Manufacturing & Processing
Recycling lithium-ion batteries with water leaching and electrowinning separation
Noteworthy AI
Energy & Power
Edge-mounted computer vision inspects distribution grid assets from utility fleet vehicles
Skytree
Food, Water, & Land
Modular direct air capture that extracts CO₂ and water for reuse in fuels, chemicals, and agriculture
JURA Bio
Food, Water, & Land
Curative, definitive, cell-based therapies for autoimmune diseases housed in a novel therapeutic platform
Salient Predictions
Food, Water, & Land
Machine learning models using ocean data to generate extended-range weather forecasts for temperature and precipitation
Glimpse Engineering
Manufacturing & Processing
Computed tomography scanning and software that visualize battery design features and quality throughout production
CalWave Power Technologies
Energy & Power
Wave energy converter technology that harnesses ocean waves for carbon-free power generation
Altitude
Product design and engineering firm helping companies develop new physical products and services
WattSto Energy
Energy & Power
Long-duration vanadium redox flow batteries paired with lithium systems for grid and microgrid storage
Ranger Solar
Energy & Power
Bringing new utility-scale renewable energy projects throughout the United States
Agrilab Technologies Inc.
Food, Water, & Land
Compost aeration and heat capture systems that accelerate organic waste conversion to fertilizer
Searover Robotics and Software
Manufacturing & Processing
AI, IoT, and robotics solutions for maintenance and health monitoring of energy and underwater assets
Starfield
Food, Water, & Land
Plant-based meat made with unique techniques
BluBridge Energy Solutions
Energy & Power
Gas stream purification systems that remove impurities to enable cleaner fossil fuel combustion on-site
Catalyxx
Manufacturing & Processing
Catalysts for converting ethanol into renewable fuels and chemicals that replace petrochemical products
TalkingHeads Wireless
Energy & Power
Software that reduces energy consumption in cellular networks, lowering operator costs and emissions
RenewCO₂
Manufacturing & Processing
Electrochemical process to convert CO₂ into fuels and chemicals, such as SAF and propylene glycol
Noir3 Energy
Energy & Power
Distributed energy consulting for multifamily and commercial real estate owners integrating renewables
Harmony Desalting
Food, Water, & Land
Batch reverse osmosis platform that reduces energy use and maximizes freshwater yield for operators
Geokiln Energy Innovation
Energy & Power
Low-cost hydrogen production by accelerating natural subsurface mineral reactions to reduce carbon emissions
Metalmark Innovations
Transportation & Logistics
The first self-renewing air cleaner for commercial buildings
Littoral Power Systems
Energy & Power
LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.
Spare-it
Manufacturing & Processing
Waste reduction platform optimizing material and resource efficiency in manufacturing operations
SensorEra
Food, Water, & Land
Wireless sensor networks that collect and process remote data to enable data-driven decision-making across industries
ToPerform
Manufacturing & Processing
Physics-informed AI with embedded sensors detects fouling and flow disruption in industrial pipelines
PooPoof Inc
Food, Water, & Land
Biomimetic technology that dissolves organic waste at the source, eliminating bins and landfills
Monadnock Energy
Energy & Power
Financing, building, and managing utility-scale renewable-energy facilities, augmented by storage
Forty Acres Consulting
Transportation & Logistics
Forty Acres Consulting — consults for both large Fortune 500 companies and startups big and small. They specialize in scaling, supply chain, logistics, business development and healthcare.
Applied Gaia
Food, Water, & Land
Sequestering carbon in the soil
Folia Materials
Manufacturing & Processing
Silver and copper particle integration into paper creates antimicrobial surfaces using standard manufacturing equipment
De-Ice
Transportation & Logistics
Electric ice protection system for aircraft that eliminates chemical de-icing fluid dependency
Massachusetts Materials Technologies
Energy & Power
Non-destructive testing system for measuring pipeline mechanical properties during operation
Transocean
Leading offshore drilling company
Daniel Consulting Group, LLC
Energy & Power
Battery consulting spanning lab design and electric aircraft propulsion pack development
Catalyxx
Manufacturing & Processing
Catalysts for converting ethanol into renewable fuels and chemicals that replace petrochemical products
TalkingHeads Wireless
Energy & Power
Software that reduces energy consumption in cellular networks, lowering operator costs and emissions
RenewCO₂
Manufacturing & Processing
Electrochemical process to convert CO₂ into fuels and chemicals, such as SAF and propylene glycol
Noir3 Energy
Energy & Power
Distributed energy consulting for multifamily and commercial real estate owners integrating renewables
Harmony Desalting
Food, Water, & Land
Batch reverse osmosis platform that reduces energy use and maximizes freshwater yield for operators
Geokiln Energy Innovation
Energy & Power
Low-cost hydrogen production by accelerating natural subsurface mineral reactions to reduce carbon emissions
Metalmark Innovations
Transportation & Logistics
The first self-renewing air cleaner for commercial buildings
Littoral Power Systems
Energy & Power
LPS sells and maintains innovative, cost-effective, low impact hydropower and ocean power equipment.
Spare-it
Manufacturing & Processing
Waste reduction platform optimizing material and resource efficiency in manufacturing operations
SensorEra
Food, Water, & Land
Wireless sensor networks that collect and process remote data to enable data-driven decision-making across industries
ToPerform
Manufacturing & Processing
Physics-informed AI with embedded sensors detects fouling and flow disruption in industrial pipelines
PooPoof Inc
Food, Water, & Land
Biomimetic technology that dissolves organic waste at the source, eliminating bins and landfills
Monadnock Energy
Energy & Power
Financing, building, and managing utility-scale renewable-energy facilities, augmented by storage
Forty Acres Consulting
Transportation & Logistics
Forty Acres Consulting — consults for both large Fortune 500 companies and startups big and small. They specialize in scaling, supply chain, logistics, business development and healthcare.
Applied Gaia
Food, Water, & Land
Sequestering carbon in the soil
Folia Materials
Manufacturing & Processing
Silver and copper particle integration into paper creates antimicrobial surfaces using standard manufacturing equipment
De-Ice
Transportation & Logistics
Electric ice protection system for aircraft that eliminates chemical de-icing fluid dependency
Massachusetts Materials Technologies
Energy & Power
Non-destructive testing system for measuring pipeline mechanical properties during operation
Transocean
Leading offshore drilling company
Daniel Consulting Group, LLC
Energy & Power
Battery consulting spanning lab design and electric aircraft propulsion pack development
The way the world makes energy, materials, and food is being reinvented right now. What happens over the next decade will decide how much better it gets: more energy with fewer emissions, more industry with cleaner air, and more resiliency for communities everywhere.
That future is being built by entrepreneurs, the heroes who turn ideas into real products, real companies, and jobs of the future.
And we know they go further & faster when they're not doing it alone.
For 15 years, Greentown Labs has a home for founders, leaning in with the space, the people, the connections, and the first customers they need.
With Greentown, Our Startups Have Raised Over $0B
All-time
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Currently home to
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Countries Where
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 help innovation move faster, from lab to market.
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.