Transforming industry faster
Transforming the systems that power, move, feed, and connect the world is the work of our time, and startups hold the key.
But breakthroughs don't scale in isolation.
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.

Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process

Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen

frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse

WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea

ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure

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

Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI

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

Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment

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

Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems

Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments

Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal

Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design

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

Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials

Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands

Thalon Materials

Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting

COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste

Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process

Thiozen
Manufacturing & Processing
Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen

frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse

WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea

ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure

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

Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI

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

Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment

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

Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems

Steven Winter Associates, Inc.
Infrastructure & Construction
Research, consulting, and advisory services to improve commercial, residential, and multifamily built environments

Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal

Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design

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

Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials

Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands

Thalon Materials

Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting

COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste

EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry

Lasso Labs
Food, Water, & Land
Using natural proteins to create real texture in alternative foods

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

Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI

Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry

eSki Watercraft
Energy & Power
Electric personal watercraft

Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning

247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power

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

RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility

Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction

GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale

Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings

SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power

Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors

DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes

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

Nomadic Drones
Energy & Power
The first autonomos drone allowing continuous and relocatable high-voltage power line monitoring

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

Circulus Air
Infrastructure & Construction
Clean air systems to directly remove harmful gases and pollutants

EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry

Lasso Labs
Food, Water, & Land
Using natural proteins to create real texture in alternative foods

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

Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI

Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry

eSki Watercraft
Energy & Power
Electric personal watercraft

Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning

247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power

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

RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility

Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction

GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale

Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings

SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power

Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors

DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes

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

Nomadic Drones
Energy & Power
The first autonomos drone allowing continuous and relocatable high-voltage power line monitoring

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

Circulus Air
Infrastructure & Construction
Clean air systems to directly remove harmful gases and pollutants
Our Startups Have Raised Over $0B
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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.
























