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.
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Elemental Advanced Materials
Manufacturing & Processing
Graphene and hydrogen from mixed and contaminated waste plastics and other organic materials
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Latitude Media
News, podcasts, market intelligence, and events for the climatetech industry
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Candid Intelligence
Infrastructure & Construction
Accelerating pre-construction engineering with Agentic AI
Elemental Advanced Materials
Manufacturing & Processing
Graphene and hydrogen from mixed and contaminated waste plastics and other organic materials
Lumiere Solutions
Infrastructure & Construction
Residential low-voltage and automated single efficiency-driven ecosystems that reduce energy waste
Revvit
Infrastructure & Construction
Low-cost, simple EV charging at commercial, multifamily, fleet parking, and public properties
Aluminum Technologies
Manufacturing & Processing
Low-GHG primary aluminum production with Carbo-Chloride Reduction
Vertical Semiconductor
Energy & Power
Power supply units designed to unleash the full potential of AI & HPC
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Octavia Carbon Co
Manufacturing & Processing
Geothermal heat to capture and mineralize CO₂
Overstory
Food, Water, & Land
Minimizing vegetation contact with power lines using satellite imagery, climate data, and machine learning
Fleet Robotics
Transportation & Logistics
Robotics to clean biofouling from ship hulls, improving fuel consumption for large ships
Monaire
Infrastructure & Construction
Reducing HVAC energy use and repair costs for small commercial buildings
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
PlaSene
Manufacturing & Processing
Converting plastic waste into liquid fuel and low-carbon hydrogen
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Latitude Media
News, podcasts, market intelligence, and events for the climatetech industry
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage
AtmoSpark Technologies
Food, Water, & Land
Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations
247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Onvector
Infrastructure & Construction
Non-chemical water treatment using plasma to rid water of PFAS and more
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
247Solar
Energy & Power
High-temp solar power with heat storage for clean industrial heat and renewable power
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
Lite-1
Manufacturing & Processing
Clean, scalable, microbe-made colour to replace toxic dyes
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis
GS Vortex Systems
Food, Water, & Land
Hydrodynamic flow technology reducing flow resistance through pipes
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Cemvita
Manufacturing & Processing
Engineered microbes to transform CO₂ and other wastes into valuable compounds, closing the carbon and waste loop
BlueShift Carbon
Manufacturing & Processing
Electrochemical CO₂-removal solution that’s low-cost, energy-efficient, redox-based, and membrane-free
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Prithvi Ventures
Investing in startups reducing emissions with unique solutions for net-zero goals
Respire Energy
Energy & Power
Safe, low-cost, and long-duration metal-air battery designed for microgrids
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Onvector
Infrastructure & Construction
Non-chemical water treatment using plasma to rid water of PFAS and more
RIVSAL HOLDINGS INC.
Energy & Power
Power plants that run on water and deliver electricity to avoid grid vulnerability and energy price volatility
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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.