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
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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.