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
Janta Power
Energy & Power
The world’s first 3D solar tower technology
NewGenium
Energy & Power
Advanced brine-to-battery grade LFP technology
MagDrive Technologies Inc.
Manufacturing & Processing
Eliminating fugitive emissions and delivering zero-leak performance and durability
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 […]
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
Arbor Energy Holdings Inc
Energy & Power
Digital-energy platform to help homeowners live more sustainably
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Revterra
Energy & Power
Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging
Janta Power
Energy & Power
The world’s first 3D solar tower technology
NewGenium
Energy & Power
Advanced brine-to-battery grade LFP technology
MagDrive Technologies Inc.
Manufacturing & Processing
Eliminating fugitive emissions and delivering zero-leak performance and durability
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 […]
Sweetch Energy
Energy & Power
Membrane-based technology that taps into osmotic power
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
Arbor Energy Holdings Inc
Energy & Power
Digital-energy platform to help homeowners live more sustainably
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
Infinite Foundry
Manufacturing & Processing
Real-time 3D operational models to improve efficiency, lower costs, and enhance sustainability
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Revterra
Energy & Power
Kinetic stabilizer for instant grid stabilization for industrial manufacturing, data centers, and rapid EV charging
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Dsider
Energy & Power
SaaS platform to accelerate the expansion of energy-transition projects
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Elementa Partners
Infrastructure & Construction
Uniting global talent to unlock high-conviction, institutional-grade investments across Texas growth sectors
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
Dsider
Energy & Power
SaaS platform to accelerate the expansion of energy-transition projects
Rushnu
Manufacturing & Processing
Turns waste into carbon-neutral chemistry
Elementa Partners
Infrastructure & Construction
Uniting global talent to unlock high-conviction, institutional-grade investments across Texas growth sectors
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Solar Mantle
Infrastructure & Construction
Film that reflects sunlight for energy-free passive cooling of structures
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
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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.