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
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Adept Materials
Infrastructure & Construction
Material innovations that improve moisture regulation, comfort, and energy efficiency
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
MagDrive Technologies Inc.
Manufacturing & Processing
Eliminating fugitive emissions and delivering zero-leak performance and durability
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
EVident Battery
Transportation & Logistics
Comprehensive, non-destructive inspection solutions for EV battery packs
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
Priority Investor Loans
Infrastructure & Construction
Simplified loan programs to fund real estate investors nationwide with income-producing properties
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
AMPeers
Energy & Power
Advanced MOCVD resulting in high-temp superconductors with higher performance, faster output, and lower cost
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
Studio 3e8
Manufacturing & Processing
Lightspeed metal 3D printing, making professional-grade fabrication affordable, compact, and easy to use
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Adept Materials
Infrastructure & Construction
Material innovations that improve moisture regulation, comfort, and energy efficiency
A&I Power Group
Energy & Power
Electricity-generation systems that convert electromagnetic energy into electrical potential
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
MagDrive Technologies Inc.
Manufacturing & Processing
Eliminating fugitive emissions and delivering zero-leak performance and durability
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
EVident Battery
Transportation & Logistics
Comprehensive, non-destructive inspection solutions for EV battery packs
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
Priority Investor Loans
Infrastructure & Construction
Simplified loan programs to fund real estate investors nationwide with income-producing properties
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Resollant
Manufacturing & Processing
Enables industrial-scale hydrogen & syngas production while capturing carbon as a monetizable solid at scale
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions
Transaera
Infrastructure & Construction
Ultra-efficient air conditioning using a novel desiccant material
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Phase Two Chemicals
Manufacturing & Processing
Advanced electrode and reactor designs for on-site, on-demand chemical generation and energy storage
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
Boot Box Labs
Energy & Power
Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC
Our Startups Have Raised Over $0B
All-time
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Currently home to
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Countries Where
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.