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
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
PooPoof Inc
Food, Water, & Land
The world’s first pocket-sized bioreactor
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
Element Resources
Energy & Power
Developing large-scale green hydrogen projects
Helix Earth Technologies
Infrastructure & Construction
Improving energy efficiency and minimizing emissions through a droplet-capture filtration system
Helium Capital
Infrastructure & Construction
Supporting growing small businesses
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
SolarKal
Energy & Power
The largest solar energy marketplace in the U.S., connecting organizations to solar providers
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
Saint-Gobain (Member Account)
Infrastructure & Construction
Worldwide leader in light and sustainable construction
Tato Labs
Manufacturing & Processing
Bioplastic products and packaging solutions made from potato starch
Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
R&P Employer Solutions
Manufacturing & Processing
HR services, workers compensation, payroll, benefits, and compliance for Houston-area employers
Daniel Consulting Group, LLC
Energy & Power
Helping researchers improve battery and cell testing and providing due diligence for potential investors
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
Harmony Desalting
Food, Water, & Land
Batch-process reverse osmosis for low-cost water desalination
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Cala Systems
Energy & Power
Intelligent heat-pump water heaters
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
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
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
Climative
Energy & Power
AI-assisted home-energy assessments deployed in an interactive, web-based platform
Harmony Desalting
Food, Water, & Land
Batch-process reverse osmosis for low-cost water desalination
Solar Materials
Energy & Power
Recovered and recycled secondary solar panel materials
Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Agrilab Technologies Inc.
Food, Water, & Land
Modular compost-aeration and heat-recovery systems
Browning the Green Space
Food, Water, & Land
Addressing diversity, equity, and inclusion across careers, companies, contracts, capital, and communities
Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
Swiss Vault
Manufacturing & Processing
Revolutionizing Data Infrastructure for the AI Era
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Aeromine Technologies, Inc.
Energy & Power
Bladeless, motionless wind turbines for the built environment
Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Cala Systems
Energy & Power
Intelligent heat-pump water heaters
Turnover Labs
Manufacturing & Processing
Modular electrolyzers converting dirty onsite CO₂ into basic chemicals
KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues
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
Wootz
Manufacturing & Processing
Carbon nanotube supermaterials to replace or augment traditional metallic conductors
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
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.