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
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
SRGE
Infrastructure & Construction
Full-service accelerator to support small and underrepresented-led construction firms
Julius Education
Infrastructure & Construction
Helping green organizations manage the changing workforce through an experience platform for job-seekers
SUPERGirls Shine Foundation
Energy & Power
Developing underserved girls in STEM to support equity in the emerging workforce
TransOceans Clean Energy Risk, LLC
Energy & Power
Risk management solutions for global clean tech risk portfolios
Powerhouse Ventures
Infrastructure & Construction
Investing in software to advance clean energy, mobility, and industry
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
Glimpse Engineering
Manufacturing & Processing
Visualizing battery scans and continuously monitoring key battery-design features
Matterworks
Manufacturing & Processing
Enabling metabolomics assays that are fast, broad, and can characterize diverse chemical classes with a single setup
FlowCellutions
Energy & Power
Preventing power outages and improving cost savings for critical battery systems
AmHyTech
Energy & Power
Ammonia infrastructure layer, enabling safe and practical liquid ammonia handling at ambient conditions
NOC Energy
Energy & Power
Decarbonizing industrial heat with power-to-heat and power-to-power solutions
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Andros Innovations
Manufacturing & Processing
Reducing the costs and energy demands of ammonia production through advanced reactor technology
SRGE
Infrastructure & Construction
Full-service accelerator to support small and underrepresented-led construction firms
Julius Education
Infrastructure & Construction
Helping green organizations manage the changing workforce through an experience platform for job-seekers
SUPERGirls Shine Foundation
Energy & Power
Developing underserved girls in STEM to support equity in the emerging workforce
TransOceans Clean Energy Risk, LLC
Energy & Power
Risk management solutions for global clean tech risk portfolios
Powerhouse Ventures
Infrastructure & Construction
Investing in software to advance clean energy, mobility, and industry
Realizse
Energy & Power
Tokenization and product verification for circularity, energy, and the real estate markets
Titan Advanced Energy Solutions
Energy & Power
Advanced battery management systems for lithium-ion batteries
LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits
QEA Tech
Energy & Power
Precise, data-driven building-envelope audits using patented AI software, drones, and thermography
Flux Marine
Transportation & Logistics
Outboard motors and complete boat packages characterized by low maintenance, long range, and outstanding performance
Swan Impact Network
Infrastructure & Construction
Angel investor network focusing on supporting early-stage companies
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Vecarius
Infrastructure & Construction
Heat-to-electricity technology to boost energy efficiency in mass markets
rStream Recycling LLC
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Terralytiq
Manufacturing & Processing
Digital models that deliver Scope 3 hotspots, actionable initiatives, and supplier engagement to cut cost and carbon
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
GeoTeknica
Manufacturing & Processing
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
rStream Recycling LLC
Manufacturing & Processing
Autonomous waste-sorting system for non-industrial settings with critical waste volumes
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
Active Surfaces
Energy & Power
Flexible, lightweight solar panels that turn any surface into solar
Rotorvault
Energy & Power
Energy-storage and load-following solutions for grid-scale and commercial applications
Boxes
Manufacturing & Processing
Smart, affordable, and sustainable retail combining the physical and digital worlds
Laminar
Manufacturing & Processing
IoT platform optimizing industrial liquid and fluid systems in supply chain, manufacturing, and data centers
Peak Power
Energy & Power
Energy-storage optimization software for commercial and industrial customers and energy storage project developers
Zero Homes
Infrastructure & Construction
Automated assessment, design, and procurement platform for residential building retrofits
Ivys Energy Solutions
Energy & Power
On-site hydrogen-generation and -dispensing appliance that uses water and electricity to make fuel-cell-grade hydrogen
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
ThermaFuels
Transportation & Logistics
Deploying scalable, financeable low-carbon methanol and sustainable fuel infrastructure
Anvil Capture Systems
Manufacturing & Processing
CO2 direct air mineralization process, delivering carbon dioxide removal
Datavedik
Energy & Power
Addressing complex optimization challenges in the energy industry
Terralytiq
Manufacturing & Processing
Digital models that deliver Scope 3 hotspots, actionable initiatives, and supplier engagement to cut cost and carbon
Timbergrove
Energy & Power
Building AI + IoT solutions that connect and optimize assets, boosting visibility, safety, and efficiency
Enel (Member Account)
Energy & Power
One of the world’s leading integrated utilities and the largest private producer of clean energy
BLU NXT
Energy & Power
Solar concentrators for high-temperature heat and energy
GeoTeknica
Manufacturing & Processing
Onboard Data
Infrastructure & Construction
Onboard — offers software analytics for HVAC service providers.
XTPL
Manufacturing & Processing
Additive manufacturing technology for ultra-precise printing of nanomaterials
Our Startups Have Raised Over $0B
All-time
0
Currently home to
0
0+
Countries Where
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.