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
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Elementium Materials
Energy & Power
Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
Upgraid RE
Infrastructure & Construction
AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals
WISE ENERGIE
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Elementium Materials
Energy & Power
Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Ensovi
Manufacturing & Processing
Cofactor recycling platform for sustainable drug manufacturing
frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse
Nominal
Manufacturing & Processing
Software that lets hardware teams test and iterate as fast as software teams
LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
Upgraid RE
Infrastructure & Construction
AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals
WISE ENERGIE
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation
Trellis Air
Infrastructure & Construction
Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
XMtrace
Manufacturing & Processing
Low-cost methane monitoring with real-time detection and autonomous response
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
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 […]
Onvector
Infrastructure & Construction
Non-chemical water treatment using plasma to rid water of PFAS and more
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation
Trellis Air
Infrastructure & Construction
Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
XMtrace
Manufacturing & Processing
Low-cost methane monitoring with real-time detection and autonomous response
Simlionics
Energy & Power
Physics-aware, advanced AI battery modeling and intelligence for EV and energy-storage systems
NONA Technologies
Food, Water, & Land
Desalinating brackish water with 60% less electricity, fewer chemical inputs, and less downtime
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
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 […]
Onvector
Infrastructure & Construction
Non-chemical water treatment using plasma to rid water of PFAS and more
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
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.