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
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Aramco Ventures (Member Account)
Energy & Power
Strategic technology-venturing program of Saudi Aramco
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Aramco Ventures (Member Account)
Energy & Power
Strategic technology-venturing program of Saudi Aramco
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management
Conduit Tech
Infrastructure & Construction
Supporting HVAC contractors through design, sales, and installation
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Beacon Climate Innovations
Energy & Power
Filling gaps between the frontlines of climate change and the emerging technologies that can best address them
Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management
Conduit Tech
Infrastructure & Construction
Supporting HVAC contractors through design, sales, and installation
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Beacon Climate Innovations
Energy & Power
Filling gaps between the frontlines of climate change and the emerging technologies that can best address them
Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
Our Startups Have Raised Over $0B
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Currently home to
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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.