Helping climatetech startupsTransformindustry faster

PurposeEnergy
Food, Water, & Land

Starfire Energy
Energy & Power

Sofar Ocean
Food, Water, & Land

Wiggins Manufacturing & Logistics Consulting
Manufacturing & Processing
Help US manufacturers and supply chain companies design new facilities and Lean out existing ones.

MacroCycle Technologies
Manufacturing & Processing

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

MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees

Heila Technologies
Energy & Power
Heila Technologies — has developed the next generation of optimization and aggregation technologies for DERs to help accelerate the adoption of clean energy.

Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors

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

QuEra Computing

Electric Fish
Energy & Power
Electric Fish — deploys NanoGrids at gas-stations for extreme-fast EV charging, and grid-scale energy-backup.

Heliotrope Photonics
Energy & Power
Coating technology that enhances solar-panel performance by transforming wasted sunlight

Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions

Spec Sensors LLC
Energy & Power

Pirl
Transportation & Logistics

rStream
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes

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

Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability

Dandelion Energy
Infrastructure & Construction
Geothermal heating and cooling systems for homes

PurposeEnergy
Food, Water, & Land

Starfire Energy
Energy & Power

Sofar Ocean
Food, Water, & Land

Wiggins Manufacturing & Logistics Consulting
Manufacturing & Processing
Help US manufacturers and supply chain companies design new facilities and Lean out existing ones.

MacroCycle Technologies
Manufacturing & Processing

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

MoveEV
Transportation & Logistics
Mitigating Scope 1 & 3 emissions for businesses while providing cost savings for employees

Heila Technologies
Energy & Power
Heila Technologies — has developed the next generation of optimization and aggregation technologies for DERs to help accelerate the adoption of clean energy.

Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors

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

QuEra Computing

Electric Fish
Energy & Power
Electric Fish — deploys NanoGrids at gas-stations for extreme-fast EV charging, and grid-scale energy-backup.

Heliotrope Photonics
Energy & Power
Coating technology that enhances solar-panel performance by transforming wasted sunlight

Form Energy
Energy & Power
Cost-effective, multi-day energy-storage solutions

Spec Sensors LLC
Energy & Power

Pirl
Transportation & Logistics

rStream
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes

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

Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability

Dandelion Energy
Infrastructure & Construction
Geothermal heating and cooling systems for homes

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

RightHand Robotics
Transportation & Logistics

CarTwin
Transportation & Logistics
CarTwin is unlocking the value of automative data by creating an integrated data ecosystem to drive actionable insight and predictive analytics to address the industry’s most pressing challenges. Its digital twin technology enables a diverse set of automotive use cases that power new innovations by connecting physical and digital worlds providing real-time operational awareness of vehicle, component, and manufacturing performance.

Sunwealth
Energy & Power

Apitronics
Food, Water, & Land

FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings

Hicor Technologies Inc.
Energy & Power

BlakBear
Food, Water, & Land

Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling

Spaero Bio
Infrastructure & Construction
Spaero Bio — enables scientists to quickly and directly automate experiments that are currently done by hand, a bottleneck of life science R&D.

NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors

Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions

Gemini Energy
We are building the world first unified system for hydrogen compression and purification at 100% recovery rate and 99.999% purity.

Climate Core Capital
Infrastructure & Construction
Climate Core — runs a climate-oriented real estate strategy, namely acquiring buildings in low climate risk locations and making those buildings the most resilient in the built environment.

SEAROVER UNDERWATER ROBOTICS
Manufacturing & Processing

DASH Clean Energy
Energy & Power
Dash Clean Energy — has developed a hydrogen simulation tool that can be used by developers to evaluate existing and planned wind and solar projects and how to manage and produce hydrogen cost competitively with existing hydrogen production pathways.

REON Technology
Energy & Power
AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage

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

String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.

INpower
INpower — is a specialty insurance brokerage & risk management firm that knows that business innovation generates risk. Their risk management mission is simple: to provide their clients with deep insurance expertise, thoughtful enterprise risk management counsel, and fierce claims advocacy supported by offices in: Houston, Boston and Irvine, California.

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

RightHand Robotics
Transportation & Logistics

CarTwin
Transportation & Logistics
CarTwin is unlocking the value of automative data by creating an integrated data ecosystem to drive actionable insight and predictive analytics to address the industry’s most pressing challenges. Its digital twin technology enables a diverse set of automotive use cases that power new innovations by connecting physical and digital worlds providing real-time operational awareness of vehicle, component, and manufacturing performance.

Sunwealth
Energy & Power

Apitronics
Food, Water, & Land

FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings

Hicor Technologies Inc.
Energy & Power

BlakBear
Food, Water, & Land

Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling

Spaero Bio
Infrastructure & Construction
Spaero Bio — enables scientists to quickly and directly automate experiments that are currently done by hand, a bottleneck of life science R&D.

NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors

Prophet AI
Food, Water, & Land
AI-based poultry-health-monitoring system to reduce chicken mortality, save revenue, and avoid carbon emissions

Gemini Energy
We are building the world first unified system for hydrogen compression and purification at 100% recovery rate and 99.999% purity.

Climate Core Capital
Infrastructure & Construction
Climate Core — runs a climate-oriented real estate strategy, namely acquiring buildings in low climate risk locations and making those buildings the most resilient in the built environment.

SEAROVER UNDERWATER ROBOTICS
Manufacturing & Processing

DASH Clean Energy
Energy & Power
Dash Clean Energy — has developed a hydrogen simulation tool that can be used by developers to evaluate existing and planned wind and solar projects and how to manage and produce hydrogen cost competitively with existing hydrogen production pathways.

REON Technology
Energy & Power
AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage

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

String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.

INpower
INpower — is a specialty insurance brokerage & risk management firm that knows that business innovation generates risk. Their risk management mission is simple: to provide their clients with deep insurance expertise, thoughtful enterprise risk management counsel, and fierce claims advocacy supported by offices in: Houston, Boston and Irvine, California.




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
All-time
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Currently home to
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Startups Operate
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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.


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.

Explore Investing
Tap into deal flow with the world’s largest community of climate and energy startups.






















