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.
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Solas Capture
Solas Capture is developing a sunlight-powered process for sustainable lithium carbonate production using novel photobase chemistry. Our technology converts lithium brines and CO₂ into battery-grade materials with lower energy use, reduced waste, and a significantly smaller environmental footprint than conventional methods.
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Endeavor Composites
Manufacturing & Processing
Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry
Adiabatic Materials
Manufacturing & Processing
Unlocking clean, affordable chemical production with electricity
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Optigon
Energy & Power
Rapid, contactless characterization for assessing performance during photovoltaic solar cell fabrication
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
Capwell Services, Inc.
Energy & Power
Capturing methane emissions from oil and gas facilities, specifically low- and intermittent-flow vents
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Solas Capture
Solas Capture is developing a sunlight-powered process for sustainable lithium carbonate production using novel photobase chemistry. Our technology converts lithium brines and CO₂ into battery-grade materials with lower energy use, reduced waste, and a significantly smaller environmental footprint than conventional methods.
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
Carbon To Stone
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Endeavor Composites
Manufacturing & Processing
Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry
Adiabatic Materials
Manufacturing & Processing
Unlocking clean, affordable chemical production with electricity
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Allkemie
Manufacturing & Processing
Producing tailored graphene and other nanomaterials at scale
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
AeroShield Materials
Infrastructure & Construction
Insulating, porous aerogels for energy-efficient windows
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
SRGE
Infrastructure & Construction
Full-service accelerator to support small and underrepresented-led construction firms
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
Anning Corporation
Energy & Power
Targeting iron-rich rocks to produce hydrogen
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
AeroShield Materials
Infrastructure & Construction
Insulating, porous aerogels for energy-efficient windows
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
SRGE
Infrastructure & Construction
Full-service accelerator to support small and underrepresented-led construction firms
Phlair
Manufacturing & Processing
Renewable-energy-powered DAC system using an electrochemical process for acid and base generation
Mission Zero Technologies
Manufacturing & Processing
Efficient electrochemistry to capture CO₂
Nebumi
Energy & Power
Emissions intelligence platform, monitoring pollution with satellite data and AI
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
MCatalysis
Manufacturing & Processing
Converting waste carbon into low-cost clean fuels with advanced microwave and catalyst technology
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns
SpringCycle Energy
Energy & Power
Rechargeable iron fuel to transform solar into baseload power
LiftOFF Technology
Energy & Power
Batteries with breakthrough energy density and safety
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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.