Transforming industry faster
Transforming the systems that power, move, feed, and connect the world is the work of our time, and startups hold the key.
But breakthroughs don't scale in isolation.
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.
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Fluor Enterprises, Inc.
Energy & Power
Leading global engineering, procurement and construction (EPC) company
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
Priority Investor Loans
Infrastructure & Construction
Simplified loan programs to fund real estate investors nationwide with income-producing properties
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Fluor Enterprises, Inc.
Energy & Power
Leading global engineering, procurement and construction (EPC) company
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
Priority Investor Loans
Infrastructure & Construction
Simplified loan programs to fund real estate investors nationwide with income-producing properties
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
BluBridge Energy Solutions
Energy & Power
Removing undesired elements from pre- and post-combustion gas streams
NewGrid
Energy & Power
Software and services to enable system operators, utilities, and power market participants to reduce grid congestion
LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
WISE ENERGIE
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
Julius Education
Infrastructure & Construction
Helping green organizations manage the changing workforce through an experience platform for job-seekers
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
BluBridge Energy Solutions
Energy & Power
Removing undesired elements from pre- and post-combustion gas streams
NewGrid
Energy & Power
Software and services to enable system operators, utilities, and power market participants to reduce grid congestion
LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
WISE ENERGIE
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power
Julius Education
Infrastructure & Construction
Helping green organizations manage the changing workforce through an experience platform for job-seekers
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
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.