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
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
ClearTrace
Energy & Power
Product suite for traceable, end-to-end data management of electricity and certificate transactions
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Trellis Air
Infrastructure & Construction
Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency
ClearTrace
Energy & Power
Product suite for traceable, end-to-end data management of electricity and certificate transactions
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Trellis Air
Infrastructure & Construction
Membrane-based dehumidifiers that are vastly more energy-efficient than desiccant wheels and standalone dehumidifiers
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
QuantAQ
Infrastructure & Construction
Air quality-monitoring networks that combine IoT hardware, machine learning, and user-friendly software design
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Kanin Energy
Energy & Power
Monetizing industrial waste heat with reduced deployment risk via third-party financing
De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals
Imperium Technologies
Energy & Power
Reducing industrial heating emissions with electrochemical processes
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Solas Capture
Solas Capture is developing a sunlight-powered process for sustainable lithium carbonate production using novel photobase chemistry. Our technology converts lithium brines and CO₂ into battery-grade materials with lower energy use, reduced waste, and a significantly smaller environmental footprint than conventional methods.
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Aelun
Mithril Technologies
Infrastructure & Construction
Reshapable reflectors for advanced antennas & radars for space-based earth and severe weather monitoring
Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup
Atlas Robotics
Transportation & Logistics
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Newfound Materials
Manufacturing & Processing
Predictive engine for materials R&D for new pathways to critical minerals
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
GeoTeknica
Manufacturing & Processing
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
Solas Capture
Solas Capture is developing a sunlight-powered process for sustainable lithium carbonate production using novel photobase chemistry. Our technology converts lithium brines and CO₂ into battery-grade materials with lower energy use, reduced waste, and a significantly smaller environmental footprint than conventional methods.
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Aelun
Mithril Technologies
Infrastructure & Construction
Reshapable reflectors for advanced antennas & radars for space-based earth and severe weather monitoring
Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup
Atlas Robotics
Transportation & Logistics
Verde Technologies
Energy & Power
Lightweight, flexible perovskite solar panels for mass industrial and commercial adoption
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Newfound Materials
Manufacturing & Processing
Predictive engine for materials R&D for new pathways to critical minerals
Haystack Ag
Food, Water, & Land
High-accuracy carbon-measurement systems for soil to drive affordable regenerative farming practices
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
GeoTeknica
Manufacturing & Processing
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
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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.