Helping climatetech startupsTransformindustry faster

Moment Energy
Energy & Power

Corrolytics
Energy & Power
Patented corrosion intelligence platform delivering near real-time corrosion detection and actionable insights

QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography

Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions

Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets

Sustonable
Manufacturing & Processing
Sustonable — mixes post-consumer recycled plastic bottles, recycled glass and natural stone to create a circular, high-quality surface material, that can be used for kitchen tops, wall panels and furniture purposes.

Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater

Sheetak
Manufacturing & Processing
Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.

CZAR Power
Energy & Power

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

Cyvl
Infrastructure & Construction
Cyvl.ai (formerly Roadgnar) — helps cities and businesses better manage their physical infrastructure assets like roads, bridges, sidewalks, buildings, and more with distributed data collection devices and machine learning.

AeroShield Materials
Infrastructure & Construction
Insulating, porous aerogels for energy-efficient windows

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

Sankofa Dynamics
Food, Water, & Land

Stepwise
Energy & Power
Stepwise — makes home electrification effortless and affordable by reducing the infrastructure upgrades costs associated with installations and helping homeowners save money on their electricity bills through energy management.

Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software

Opus One Solutions
Energy & Power

Future
Future — simplifies the transition to a net-zero economy for individuals and families. Future offers a set of financial tools and incentives for climate smart living. Future takes a 360°view of spending and generates individualized options to save money and reduce carbon emissions with their decision-engine.

Beantrust
Food, Water, & Land

Maxwellian
Energy & Power
Maxwellian — empowers mobility, energy, and agricultural industries by providing autonomous sanitization and monitoring solutions using unique optical IoT technology to ensure data accessibility for safety and asset management.

Moment Energy
Energy & Power

Corrolytics
Energy & Power
Patented corrosion intelligence platform delivering near real-time corrosion detection and actionable insights

QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography

Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions

Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets

Sustonable
Manufacturing & Processing
Sustonable — mixes post-consumer recycled plastic bottles, recycled glass and natural stone to create a circular, high-quality surface material, that can be used for kitchen tops, wall panels and furniture purposes.

Circular Materials
Manufacturing & Processing
Critical raw materials from industrial wastewater

Sheetak
Manufacturing & Processing
Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.

CZAR Power
Energy & Power

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

Cyvl
Infrastructure & Construction
Cyvl.ai (formerly Roadgnar) — helps cities and businesses better manage their physical infrastructure assets like roads, bridges, sidewalks, buildings, and more with distributed data collection devices and machine learning.

AeroShield Materials
Infrastructure & Construction
Insulating, porous aerogels for energy-efficient windows

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

Sankofa Dynamics
Food, Water, & Land

Stepwise
Energy & Power
Stepwise — makes home electrification effortless and affordable by reducing the infrastructure upgrades costs associated with installations and helping homeowners save money on their electricity bills through energy management.

Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software

Opus One Solutions
Energy & Power

Future
Future — simplifies the transition to a net-zero economy for individuals and families. Future offers a set of financial tools and incentives for climate smart living. Future takes a 360°view of spending and generates individualized options to save money and reduce carbon emissions with their decision-engine.

Beantrust
Food, Water, & Land

Maxwellian
Energy & Power
Maxwellian — empowers mobility, energy, and agricultural industries by providing autonomous sanitization and monitoring solutions using unique optical IoT technology to ensure data accessibility for safety and asset management.

WattGlass
Energy & Power

3D Architech, Inc.
Manufacturing & Processing
Ultra-fine and gel-based metal manufacturing, creating high-efficiency microstructures for cooling and clean energy

Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology

Atlas Robotics
Transportation & Logistics

Ohmium International
Energy & Power

Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint

Quantum Diamond Technologies
Manufacturing & Processing

Starfire Energy
Energy & Power

Cala Systems
Energy & Power
Intelligent heat-pump water heaters

Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste

TalkingHeads Wireless
Energy & Power
TalkingHeads Wireless — develops Smart Network Towers, starting with the world’s most energy-efficient remote radio heads (RRH), which is the hardware box that sits at the top of the cell tower.

Carbfix
Manufacturing & Processing

Thola
Energy & Power
On-demand marketplace for commercial building sustainability and safety management

REI
Energy & Power

AIRCO
Energy & Power

Malta
Energy & Power

Harmony Desalting
Food, Water, & Land
Batch reverse osmosis process for low-cost water desalination

Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile

Adiabatic Materials
Manufacturing & Processing
Unlocking clean, affordable chemical production with electricity

Footprint

WattGlass
Energy & Power

3D Architech, Inc.
Manufacturing & Processing
Ultra-fine and gel-based metal manufacturing, creating high-efficiency microstructures for cooling and clean energy

Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology

Atlas Robotics
Transportation & Logistics

Ohmium International
Energy & Power

Decimetrix
Energy & Power
AI platform to help clients measure their carbon footprint

Quantum Diamond Technologies
Manufacturing & Processing

Starfire Energy
Energy & Power

Cala Systems
Energy & Power
Intelligent heat-pump water heaters

Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste

TalkingHeads Wireless
Energy & Power
TalkingHeads Wireless — develops Smart Network Towers, starting with the world’s most energy-efficient remote radio heads (RRH), which is the hardware box that sits at the top of the cell tower.

Carbfix
Manufacturing & Processing

Thola
Energy & Power
On-demand marketplace for commercial building sustainability and safety management

REI
Energy & Power

AIRCO
Energy & Power

Malta
Energy & Power

Harmony Desalting
Food, Water, & Land
Batch reverse osmosis process for low-cost water desalination

Mars Materials
Manufacturing & Processing
Converting CO₂ and biomass into acrylonitrile

Adiabatic Materials
Manufacturing & Processing
Unlocking clean, affordable chemical production with electricity

Footprint




The way the world makes energy, materials, and food is changing — and the next decade will decide whether that change makes life better: more energy with fewer emissions, more industry with cleaner air, more good jobs.
That future comes from entrepreneurs — the heroes who turn ideas into real products, real companies, and the jobs of the future. And the ones who make it are the ones with a community behind them.
For 15 years, Greentown has been that community — leaning in with the space, the people, the funding, and the first customers they need. Get behind the entrepreneurs building our future.
Our Startups Have Raised Over $0B
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New Jobs Created by Our Members, and Counting
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.


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Access the most concentrated pipeline of vetted climatetech companies in North America. Partner on pilots, invest, or join as a corporate sponsor.

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