Helping entrepreneursTransformindustry faster
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.
Transforming the systems that power, move, feed, and connect the world is the work of our time, and startups hold the key.
Greentown is a 501(c)(3) non-profit organization
Packwise
Manufacturing & Processing
IIoT sensors combined with a software and analytics platform to optimize industrial supply chains
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Terralytiq
Manufacturing & Processing
Digital models that deliver Scope 3 hotspots, actionable initiatives, and supplier engagement to cut cost and carbon
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
eSki Watercraft
Energy & Power
Electric personal watercraft
Torres Orbital Mining Inc (TOM)
Infrastructure & Construction
Autonomous lunar excavation systems for dust-free regolith mining and space operations
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Singularity Energy
Energy & Power
Data and software solutions for grid decarbonization
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Provocative
Manufacturing & Processing
Replacing data centers’ cooling systems with carbon capture
String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
rStream Recycling LLC
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
Packwise
Manufacturing & Processing
IIoT sensors combined with a software and analytics platform to optimize industrial supply chains
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Terralytiq
Manufacturing & Processing
Digital models that deliver Scope 3 hotspots, actionable initiatives, and supplier engagement to cut cost and carbon
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
Emrod
Energy & Power
Sustainable power with long-range wireless power transfer technology
eSki Watercraft
Energy & Power
Electric personal watercraft
Torres Orbital Mining Inc (TOM)
Infrastructure & Construction
Autonomous lunar excavation systems for dust-free regolith mining and space operations
Geokiln Energy Innovation
Energy & Power
Breakthrough low-cost, low-carbon hydrogen production approach that accelerates natural subsurface mineral reactions
Next Rung Technology
Manufacturing & Processing
Supporting clean technologies in their commercialization journeys with expert engineering consulting
Singularity Energy
Energy & Power
Data and software solutions for grid decarbonization
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
Provocative
Manufacturing & Processing
Replacing data centers’ cooling systems with carbon capture
String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
rStream Recycling LLC
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Keysight Technologies (Member Account)
Manufacturing & Processing
World’s leading electronic measurement company
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Thola
Energy & Power
On-demand marketplace for commercial building sustainability and safety management
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies
Sora Fuel Corporation
Transportation & Logistics
Cost-effective sustainable aviation fuel
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
American Battery Technology Company
Energy & Power
Advanced technology, first-mover lithium-ion battery recycling and primary battery metal extraction company
ICODOS
Manufacturing & Processing
Scalable clean methanol to decarbonize transport and chemicals
Keysight Technologies (Member Account)
Manufacturing & Processing
World’s leading electronic measurement company
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Thola
Energy & Power
On-demand marketplace for commercial building sustainability and safety management
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Corrolytics
Energy & Power
Corrosion detection through electrochemical innovation, integrated with advanced AI technology
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Amplified Industries
Infrastructure & Construction
AI-driven control solution for oil wells using acoustic signals and edge computing to reduce costs and detect issues
FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings
Dugu Systems
Energy & Power
Zero-carbon power with an emissions-free gas turbine
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Biosimo
Manufacturing & Processing
Biosimo makes eco-friendly chemicals from plant waste using a clean, low-cost process
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
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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.