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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

Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes

A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential

Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction

GeoTeknica
Manufacturing & Processing

Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications

Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds

Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes

Cala Systems
Energy & Power
Intelligent heat-pump water heaters

MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology

Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process

Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions

Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability

HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning

FLUIDXLAB Americas Inc.
Manufacturing & Processing
AI-powered microfluidic tools that help control and improve fluid processes across many industries

Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns

SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management

Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system

Orien Energy
Infrastructure & Construction
Sorption heat pump to recover waste heat from dryer exhaust

TDS Select
Food, Water, & Land
Modular, scalable FCDI system capable of desalinating brackish water using low energy

Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes

A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential

Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction

GeoTeknica
Manufacturing & Processing

Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications

Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds

Carbonext
Manufacturing & Processing
3D-graphene technology that develops integrated solutions with carbon-coated silicon anodes

Cala Systems
Energy & Power
Intelligent heat-pump water heaters

MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology

Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process

Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions

Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability

HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning

FLUIDXLAB Americas Inc.
Manufacturing & Processing
AI-powered microfluidic tools that help control and improve fluid processes across many industries

Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns

SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management

Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system

Orien Energy
Infrastructure & Construction
Sorption heat pump to recover waste heat from dryer exhaust

TDS Select
Food, Water, & Land
Modular, scalable FCDI system capable of desalinating brackish water using low energy

Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry

Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams

Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems

WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea

Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials

Lasso Labs
Food, Water, & Land
Using natural proteins to create real texture in alternative foods

HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware

Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software

PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor

Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC

LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety

HKG Energy
Energy & Power
Silicon materials that increase battery energy density

Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale

Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era

Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts

Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop

Elementium Materials
Energy & Power
Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries

Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen

Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup

Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors

Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry

Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams

Mocean Energy
Energy & Power
Hybrid-offshore renewable power stations, combining wave, solar, and battery systems

WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea

Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials

Lasso Labs
Food, Water, & Land
Using natural proteins to create real texture in alternative foods

HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware

Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software

PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor

Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC

LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety

HKG Energy
Energy & Power
Silicon materials that increase battery energy density

Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale

Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era

Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts

Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop

Elementium Materials
Energy & Power
Battery-electrolyte technology that unlocks affordable, lightweight, long-lasting, intrinsically safe batteries

Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen

Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup

Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
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.























