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
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
REON Technology
Energy & Power
AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage
Arbon
Energy & Power
Low energy humidity-driven modular tech capturing and releasing CO2 for practical decarbonization
Thalon Materials
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Arbor Energy Holdings Inc
Energy & Power
Digital-energy platform to help homeowners live more sustainably
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
AllSpice.io
Infrastructure & Construction
A collaboration hub for hardware teams with revision control, design reviews, and releases
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Ententia
Energy & Power
Trusted, scalable enterprise AI solutions that turn context into competitive advantage
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts
COI Energy
Energy & Power
AI and machine learning to predict and prevent energy waste
New Mantle Technologies
Energy & Power
Subsurface characterization with physics and AI
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
REON Technology
Energy & Power
AI-driven optimization of systems through tailored power management of batteries and PV panels for energy storage
Arbon
Energy & Power
Low energy humidity-driven modular tech capturing and releasing CO2 for practical decarbonization
Thalon Materials
SpiralWave
Manufacturing & Processing
Low-cost, scalable, high-quality carbon removal using novel electrochemistry
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Arbor Energy Holdings Inc
Energy & Power
Digital-energy platform to help homeowners live more sustainably
EnergyGigs
Food, Water, & Land
Talent and freelance platform for the energy industry
AllSpice.io
Infrastructure & Construction
A collaboration hub for hardware teams with revision control, design reviews, and releases
SPHINX INC
Energy & Power
High-speed 24/7 energy trading with blockchain clarity and instant settlement
Catalyxx
Manufacturing & Processing
Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals
Teal Bio
Manufacturing & Processing
Reusable N95 respirator system for healthcare workers to reduce landfill waste
Licube
Manufacturing & Processing
Sustainable lithium recovery through electrodialysis
DrinKicks
Food, Water, & Land
Repurposing food waste and recycled materials into shoes
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Ententia
Energy & Power
Trusted, scalable enterprise AI solutions that turn context into competitive advantage
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Solidec
Manufacturing & Processing
Converting carbon into chemicals using only air, water, and renewable electricity
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Circulus Air
Infrastructure & Construction
Clean air systems to directly remove harmful gases and pollutants
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
AdaViv
Food, Water, & Land
Hardware-enabled crop-care software for greenhouse and indoor growers to maximize quality yields without added labor
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
HarvestAi
Food, Water, & Land
Computer vision and AI to provide greenhouse operators with automated data for optimized harvest planning
Pike Robotics
Energy & Power
Wall-crawling robots with advanced sensors to perform in-service inspections inside hazardous spaces
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Capital Energy
Energy & Power
Helping climatetech companies translate complex work into compelling brands
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Clear Sky Innovations
Manufacturing & Processing
A physics-based, AI-powered geoscience platform that uses multi-modal data sets to minimize time spent on data wrangling
ATS Energy
Energy & Power
Converting waste heat into power without any moving parts
Flight Guard AI
Transportation & Logistics
Pilot-wearable safety systems using human-centered AI to enhance pilot awareness
Adaion
Energy & Power
AI-driven grid optimization & integrated system planning platform
Solidec
Manufacturing & Processing
Converting carbon into chemicals using only air, water, and renewable electricity
Carbion
Manufacturing & Processing
Affordable and clean biomass transformation to graphite for batteries
Circulus Air
Infrastructure & Construction
Clean air systems to directly remove harmful gases and pollutants
Coflux Purification, Inc
Food, Water, & Land
A modular, on-site water treatment system eliminating persistent contaminants from water and industrial waste streams
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Alma Energy
Energy & Power
Geothermal exploration to deliver scaled renewable energy production at economic levels
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
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.