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
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Ententia
Energy & Power
Trusted, scalable enterprise AI solutions that turn context into competitive advantage
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Terralytiq
Manufacturing & Processing
Digital models that deliver Scope 3 hotspots, actionable initiatives, and supplier engagement to cut cost and carbon
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
GeoTeknica
Manufacturing & Processing
Cala Systems
Energy & Power
Intelligent heat-pump water heaters
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 […]
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Conduit Tech
Infrastructure & Construction
Supporting HVAC contractors through design, sales, and installation
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Ententia
Energy & Power
Trusted, scalable enterprise AI solutions that turn context into competitive advantage
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Terralytiq
Manufacturing & Processing
Digital models that deliver Scope 3 hotspots, actionable initiatives, and supplier engagement to cut cost and carbon
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
GeoTeknica
Manufacturing & Processing
Cala Systems
Energy & Power
Intelligent heat-pump water heaters
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 […]
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Conduit Tech
Infrastructure & Construction
Supporting HVAC contractors through design, sales, and installation
Encore CO2
Manufacturing & Processing
Converting captured CO₂ into valuable industrial molecules
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability
Intention
Energy & Power
Climate-infrastructure-investment platform
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Provocative
Manufacturing & Processing
Replacing data centers’ cooling systems with carbon capture
Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality
Intention
Energy & Power
Climate-infrastructure-investment platform
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Provocative
Manufacturing & Processing
Replacing data centers’ cooling systems with carbon capture
Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality
Our Startups Have Raised Over $0B
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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.