Helping climatetech startupsTransformindustry faster

Skytree
Food, Water, & Land
Skytree — harnesses carbon through the power of decentralized direct air capture technology. They create one of the world’s smallest and simplest circular carbon solution to transform how food is grown to provide cleaner water.

Hibot
Infrastructure & Construction
Solutions for infrastructures across industries.

Visolis
Infrastructure & Construction

Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits

PolyJoule
Energy & Power
PolyJoule — develops low-cost, high-power energy storage designed to strengthen the power grid.

Public Grid
Energy & Power

Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity

change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities

Geckskin
Manufacturing & Processing

Carbonbase

Transocean

Spec Sensors LLC
Energy & Power

ATOM-X
Energy & Power
Transforming CO₂ into sustainable fuels like green methanol

Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns

Renewell Energy
Energy & Power
Gravitational energy storage

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.

Renu Energy
Manufacturing & Processing
Converting waste and converting it into fuels and energy helping to create a more responsible environment

PV Nano Cell
Energy & Power
Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells

L3 Open Water Power
Energy & Power

CLS Wind
Energy & Power
Self-erecting system for installing wind turbines

Skytree
Food, Water, & Land
Skytree — harnesses carbon through the power of decentralized direct air capture technology. They create one of the world’s smallest and simplest circular carbon solution to transform how food is grown to provide cleaner water.

Hibot
Infrastructure & Construction
Solutions for infrastructures across industries.

Visolis
Infrastructure & Construction

Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits

PolyJoule
Energy & Power
PolyJoule — develops low-cost, high-power energy storage designed to strengthen the power grid.

Public Grid
Energy & Power

Clean Crop Technologies
Food, Water, & Land
Improving food safety and reducing food waste by removing contaminants with food-grade gasses and electricity

change:WATER Labs
Food, Water, & Land
Low-cost, compact, waterless toilet for non-sewered households and communities

Geckskin
Manufacturing & Processing

Carbonbase

Transocean

Spec Sensors LLC
Energy & Power

ATOM-X
Energy & Power
Transforming CO₂ into sustainable fuels like green methanol

Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns

Renewell Energy
Energy & Power
Gravitational energy storage

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.

Renu Energy
Manufacturing & Processing
Converting waste and converting it into fuels and energy helping to create a more responsible environment

PV Nano Cell
Energy & Power
Advanced nano conductive pastes enabling finer, faster, and more efficient metallization for next-gen solar cells

L3 Open Water Power
Energy & Power

CLS Wind
Energy & Power
Self-erecting system for installing wind turbines

SpadXTech
Food, Water, & Land
SpadXTech — seeks to significantly reduce CO2 emissions through the manufacturing of various carbon negative cellulose-based materials.

Agira
Energy & Power
Agira Photonics — designs optical films for superior light management. Applications requiring highly collimated light with minimal chromatic aberration, such as LED lighting and displays, can be made more efficient with Agira’s film technology.

Keystone Tower Systems
Energy & Power

GreenLabs Recycling
Manufacturing & Processing

AIRCO
Energy & Power

Arbon
Energy & Power
Low energy humidity-driven modular tech capturing and releasing CO2 for practical decarbonization

ClearTrace
Energy & Power
Product suite for traceable, end-to-end data management of electricity and certificate transactions

SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management

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.

SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers

Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂

Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals

MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology

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.

Endeavor Composites
Manufacturing & Processing
Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry

Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar

EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle

Carbonova
Manufacturing & Processing
Carbonova has a unique solution to solidify carbon emissions and lock them permanently in solid carbon nanofibers. To date, 2980 businesses and financial institutions are taking action toward net-zero emissions by 2040 working with the Science-Based Targets initiative (SBTi). Our solution monetizes carbon emissions into solid carbon for our everyday products such as building materials and plastics. Currently solid carbon is extracted from naturally occurring and confined resources such as graphite or oils.

Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features

Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces

SpadXTech
Food, Water, & Land
SpadXTech — seeks to significantly reduce CO2 emissions through the manufacturing of various carbon negative cellulose-based materials.

Agira
Energy & Power
Agira Photonics — designs optical films for superior light management. Applications requiring highly collimated light with minimal chromatic aberration, such as LED lighting and displays, can be made more efficient with Agira’s film technology.

Keystone Tower Systems
Energy & Power

GreenLabs Recycling
Manufacturing & Processing

AIRCO
Energy & Power

Arbon
Energy & Power
Low energy humidity-driven modular tech capturing and releasing CO2 for practical decarbonization

ClearTrace
Energy & Power
Product suite for traceable, end-to-end data management of electricity and certificate transactions

SBD Technologies
Transportation & Logistics
Fully automated, scalable EV home charging and energy optimization solutions for sustainable fleet management

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.

SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers

Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂

Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals

MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology

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.

Endeavor Composites
Manufacturing & Processing
Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry

Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar

EarthEn
Energy & Power
Enabling electrification through CO₂-based thermodynamic cycle

Carbonova
Manufacturing & Processing
Carbonova has a unique solution to solidify carbon emissions and lock them permanently in solid carbon nanofibers. To date, 2980 businesses and financial institutions are taking action toward net-zero emissions by 2040 working with the Science-Based Targets initiative (SBTi). Our solution monetizes carbon emissions into solid carbon for our everyday products such as building materials and plastics. Currently solid carbon is extracted from naturally occurring and confined resources such as graphite or oils.

Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features

Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces




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.
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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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