Helping climatetech startupsTransformindustry faster

ALLY Energy
Infrastructure & Construction
ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.

Mithril Technologies
Infrastructure & Construction
Reshapable reflectors for advanced antennas & radars for space-based earth and severe weather monitoring

Wise Energie
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power

Earthbond
Energy & Power
Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.

Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen

Energy Toolbase
Energy & Power
Energy Toolbase — is an industry leading software platform that provides a cohesive suite of project modeling, energy storage control and asset monitoring products that enable solar and energy storage developers to deploy projects more efficiently.

Circe Bioscience
Food, Water, & Land
Circe Industries circularizes industries with cellular factories.

frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse

MicroAvionics
Transportation & Logistics

Axiom Optics
Manufacturing & Processing
Axiom Optics — provides optical instrumentation for fundamental sciences (astronomy, physics, biology) and industrial quality control.

C16 Biosciences
Manufacturing & Processing

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

Applied Bioplastics
Food, Water, & Land
Applied Bioplastics — is commercializing plant-based polymers that are far healthier and more sustainable, at competitive pricing to their petrochemical-based analogues

AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor

Raise Green
Energy & Power
Raise Green — helps make it easy to start your own solar energy project or climate action company. Anyone can start a project on Raise Green and bring clean energy to their business or community.

FGC Plasma Solutions
Energy & Power

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.

Capture6
Manufacturing & Processing
Capture6 — removes carbon from the atmosphere while producing clean water and other industrial products from seawater or other saltwater inputs.

Accion Systems
Transportation & Logistics
Accion Systems — develops in-space propulsion technologies that optimize scalability, performance, and efficiency to accelerate the exploration of space. Accion’s flagship product, TILE, uses proprietary electrospray thrusters, bringing electric propulsion to satellites of all sizes and redefining in-space capabilities for the 21st century.

Verdox Inc
Manufacturing & Processing
Verdox — is making scalable, cost-effective carbon capture and removal a reality. Founded in late 2019 by Dr. Brian Baynes, Prof. T. Alan Hatton, and Dr. Sahag Voskian, the company is commercializing its electroswing adsorption (ESA) platform technology, originally developed at MIT, to remove carbon dioxide from industrial emissions and the air with 70% energy savings versus conventional approaches.

ALLY Energy
Infrastructure & Construction
ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.

Mithril Technologies
Infrastructure & Construction
Reshapable reflectors for advanced antennas & radars for space-based earth and severe weather monitoring

Wise Energie
Energy & Power
Blending vertical-axis wind, solar PV, and battery storage into a single, silent system generating 24/7 clean power

Earthbond
Energy & Power
Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.

Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen

Energy Toolbase
Energy & Power
Energy Toolbase — is an industry leading software platform that provides a cohesive suite of project modeling, energy storage control and asset monitoring products that enable solar and energy storage developers to deploy projects more efficiently.

Circe Bioscience
Food, Water, & Land
Circe Industries circularizes industries with cellular factories.

frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse

MicroAvionics
Transportation & Logistics

Axiom Optics
Manufacturing & Processing
Axiom Optics — provides optical instrumentation for fundamental sciences (astronomy, physics, biology) and industrial quality control.

C16 Biosciences
Manufacturing & Processing

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

Applied Bioplastics
Food, Water, & Land
Applied Bioplastics — is commercializing plant-based polymers that are far healthier and more sustainable, at competitive pricing to their petrochemical-based analogues

AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor

Raise Green
Energy & Power
Raise Green — helps make it easy to start your own solar energy project or climate action company. Anyone can start a project on Raise Green and bring clean energy to their business or community.

FGC Plasma Solutions
Energy & Power

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.

Capture6
Manufacturing & Processing
Capture6 — removes carbon from the atmosphere while producing clean water and other industrial products from seawater or other saltwater inputs.

Accion Systems
Transportation & Logistics
Accion Systems — develops in-space propulsion technologies that optimize scalability, performance, and efficiency to accelerate the exploration of space. Accion’s flagship product, TILE, uses proprietary electrospray thrusters, bringing electric propulsion to satellites of all sizes and redefining in-space capabilities for the 21st century.

Verdox Inc
Manufacturing & Processing
Verdox — is making scalable, cost-effective carbon capture and removal a reality. Founded in late 2019 by Dr. Brian Baynes, Prof. T. Alan Hatton, and Dr. Sahag Voskian, the company is commercializing its electroswing adsorption (ESA) platform technology, originally developed at MIT, to remove carbon dioxide from industrial emissions and the air with 70% energy savings versus conventional approaches.

Kornit Digital
Manufacturing & Processing
Kornit Digital (formerly Voxel8) — is developing digital manufacturing systems that revolutionize how footwear and athletic apparel are designed, manufactured, and delivered to consumers.

Bodhi
Energy & Power
Bodhi — cultivates the bond between people and the energy that powers their lives. The company’s software platform empowers solar companies to deliver amazing customer experiences with ease. Bodhi automates communication and personalizes the homeowners’ experience, so that installers can focus on what they do best – executing projects, making more sales, and transforming communities around energy.

Moonflower Farms
Food, Water, & Land
Moonflower Technologies uses space age technology to solve real world problems.

MacroCycle Technologies
Manufacturing & Processing

It's Electric
Infrastructure & Construction
it's electric accelerates the adoption of EVs with a scalable and simple Level-2 curbside charging solution, ensuring that every community has access to clean, sustainable transportation options. it's electric's "behind the meter" approach simplifies the installation process by eliminating the need for utility coordination, and is the first in the country to offer EVSE hardware with a detachable cord.

L3 Open Water Power
Energy & Power

Mass Magnetics
Manufacturing & Processing
MECo specializes in the automated manufacture of structured functional materials for magnetic and electrochemical applications.

Public Grid
Energy & Power

Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision

Felixfusion

STEM Americas Foundation

AllSpice.io
Infrastructure & Construction
A collaboration hub for hardware teams with revision control, design reviews, and releases

AeroNero
Food, Water, & Land
Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.

Varea Energy
Energy & Power
Varea Energy — aims to help enable the world’s transition to an energy-efficient and sustainable future by rooting out inefficient waste, water, and energy systems to increase sustainability and decrease operational costs for commercial facilities.

Piaggio Fast Forward
Transportation & Logistics

De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals

Electra
Manufacturing & Processing
ElectraSteel's — mission is to electrify and decarbonize steelmaking using renewable energy with zero carbon dioxide emissions while lowering the energy intensity and cost.

Emerald Cities Collaborative
Infrastructure & Construction

Solarflux
Energy & Power
SolarFlux — makes the FOCUS, a parabolic dish concentrator capable of delivering flexible, clean, inexpensive solar thermal power for a wide range of applications.

Understory
Infrastructure & Construction
Weather hardware and analytics

Kornit Digital
Manufacturing & Processing
Kornit Digital (formerly Voxel8) — is developing digital manufacturing systems that revolutionize how footwear and athletic apparel are designed, manufactured, and delivered to consumers.

Bodhi
Energy & Power
Bodhi — cultivates the bond between people and the energy that powers their lives. The company’s software platform empowers solar companies to deliver amazing customer experiences with ease. Bodhi automates communication and personalizes the homeowners’ experience, so that installers can focus on what they do best – executing projects, making more sales, and transforming communities around energy.

Moonflower Farms
Food, Water, & Land
Moonflower Technologies uses space age technology to solve real world problems.

MacroCycle Technologies
Manufacturing & Processing

It's Electric
Infrastructure & Construction
it's electric accelerates the adoption of EVs with a scalable and simple Level-2 curbside charging solution, ensuring that every community has access to clean, sustainable transportation options. it's electric's "behind the meter" approach simplifies the installation process by eliminating the need for utility coordination, and is the first in the country to offer EVSE hardware with a detachable cord.

L3 Open Water Power
Energy & Power

Mass Magnetics
Manufacturing & Processing
MECo specializes in the automated manufacture of structured functional materials for magnetic and electrochemical applications.

Public Grid
Energy & Power

Gaia AI
Food, Water, & Land
Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision

Felixfusion

STEM Americas Foundation

AllSpice.io
Infrastructure & Construction
A collaboration hub for hardware teams with revision control, design reviews, and releases

AeroNero
Food, Water, & Land
Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.

Varea Energy
Energy & Power
Varea Energy — aims to help enable the world’s transition to an energy-efficient and sustainable future by rooting out inefficient waste, water, and energy systems to increase sustainability and decrease operational costs for commercial facilities.

Piaggio Fast Forward
Transportation & Logistics

De-Ice
Transportation & Logistics
Electric de-icing technology designed to help the aerospace industry eliminate all chemicals

Electra
Manufacturing & Processing
ElectraSteel's — mission is to electrify and decarbonize steelmaking using renewable energy with zero carbon dioxide emissions while lowering the energy intensity and cost.

Emerald Cities Collaborative
Infrastructure & Construction

Solarflux
Energy & Power
SolarFlux — makes the FOCUS, a parabolic dish concentrator capable of delivering flexible, clean, inexpensive solar thermal power for a wide range of applications.

Understory
Infrastructure & Construction
Weather hardware and analytics




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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