Helping climatetech startupsTransformindustry faster
R3 Energy
Energy & Power
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Understory
Infrastructure & Construction
Weather hardware and analytics
Salient Predictions
Food, Water, & Land
Salient Predictions uses ocean data and machine learning to provide the world's most accurate weather forecasts from 3 weeks to 9 months out, enabling climate change resiliency and mitigation within industry.
Anzu Partners
Manufacturing & Processing
Deep Anchor Solutions
Infrastructure & Construction
Anchoring solutions for floating applications including energy, aquaculture, and large-scale infrastructure
ConnectDER
Energy & Power
ConnectDER — unlocks the massive potential of DERs by turning the meter socket into the utility’s all-in-one plug-in point for solar, storage, EVs, and beyond.
REI
Energy & Power
Arista Solutions
AeroNero
Food, Water, & Land
Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.
Metalex Commodities
Manufacturing & Processing
Metalex delivers carbon neutral critical metals needed for the green energy transition.
Massachusetts Climatetech Studio
Energy & Power
Solidec
Manufacturing & Processing
Using air, water, and electricity, Solidec generates the world's most essential chemicals, on-site and on-demand.
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Carbfix
Manufacturing & Processing
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
RightHand Robotics
Transportation & Logistics
Sustainable America
Food, Water, & Land
R3 Energy
Energy & Power
WhaleSpotter
Transportation & Logistics
Thermal imaging and AI to prevent marine mammal strikes at sea
Hera Materials
Manufacturing & Processing
Regenerative plastics made from diverse, local biomass, powered by robotics and AI
Lydian
Manufacturing & Processing
Fully electrified reactors for high-efficiency conversion of non-fossil feedstocks into pure syngas
Understory
Infrastructure & Construction
Weather hardware and analytics
Salient Predictions
Food, Water, & Land
Salient Predictions uses ocean data and machine learning to provide the world's most accurate weather forecasts from 3 weeks to 9 months out, enabling climate change resiliency and mitigation within industry.
Anzu Partners
Manufacturing & Processing
Deep Anchor Solutions
Infrastructure & Construction
Anchoring solutions for floating applications including energy, aquaculture, and large-scale infrastructure
ConnectDER
Energy & Power
ConnectDER — unlocks the massive potential of DERs by turning the meter socket into the utility’s all-in-one plug-in point for solar, storage, EVs, and beyond.
REI
Energy & Power
Arista Solutions
AeroNero
Food, Water, & Land
Water for all, always Empowering sustainable living through innovative air-water generation technology, providing clean and accessible water to communities while combating climate change.
Metalex Commodities
Manufacturing & Processing
Metalex delivers carbon neutral critical metals needed for the green energy transition.
Massachusetts Climatetech Studio
Energy & Power
Solidec
Manufacturing & Processing
Using air, water, and electricity, Solidec generates the world's most essential chemicals, on-site and on-demand.
Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses
Carbfix
Manufacturing & Processing
CLS Wind
Energy & Power
Self-erecting system for installing wind turbines
RightHand Robotics
Transportation & Logistics
Sustainable America
Food, Water, & Land
Hertha Metals Inc.
Energy & Power
CGIS
Energy & Power
enaDyne
Manufacturing & Processing
enaDyne — develops non-thermal plasma catalysis reactors to convert CO2 into chemicals and fuels.
RailPod
Transportation & Logistics
Sustonable
Manufacturing & Processing
Sustonable — mixes post-consumer recycled plastic bottles, recycled glass and natural stone to create a circular, high-quality surface material, that can be used for kitchen tops, wall panels and furniture purposes.
Immedia Power
Energy & Power
Immedia Power gives space-constrained sites the on-site power they need to run and scale without waiting on the grid.
Enersion
Energy & Power
Adept Materials
Infrastructure & Construction
Material innovations that improve moisture regulation, comfort, and energy efficiency
Aquasaic
Food, Water, & Land
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Harmony Desalting
Food, Water, & Land
Batch reverse osmosis process for low-cost water desalination
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
BlueTec Energy
Energy & Power
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Carbontec
Infrastructure & Construction
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
ALGBIO
Manufacturing & Processing
ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.
FutureOn
Energy & Power
FutureOn — FutureOn's FieldTwin creates a dynamic and 3D geospatial common data environment across surface, subsea, and subsurface domains, with open API connectivity into third-party tools and existing customer workflows.
Hertha Metals Inc.
Energy & Power
CGIS
Energy & Power
enaDyne
Manufacturing & Processing
enaDyne — develops non-thermal plasma catalysis reactors to convert CO2 into chemicals and fuels.
RailPod
Transportation & Logistics
Sustonable
Manufacturing & Processing
Sustonable — mixes post-consumer recycled plastic bottles, recycled glass and natural stone to create a circular, high-quality surface material, that can be used for kitchen tops, wall panels and furniture purposes.
Immedia Power
Energy & Power
Immedia Power gives space-constrained sites the on-site power they need to run and scale without waiting on the grid.
Enersion
Energy & Power
Adept Materials
Infrastructure & Construction
Material innovations that improve moisture regulation, comfort, and energy efficiency
Aquasaic
Food, Water, & Land
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Harmony Desalting
Food, Water, & Land
Batch reverse osmosis process for low-cost water desalination
Manatee Energy
Infrastructure & Construction
Rigorous and automated system design for affordable home heat pumps
BlueTec Energy
Energy & Power
Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining
Carbontec
Infrastructure & Construction
Electric Hydrogen
Energy & Power
Manufactureing the world’s most powerful electrolyzers to produce the lowest cost clean hydrogen
NeuraliX
Energy & Power
AI solutions to optimize operations and reduce emissions for the energy and manufacturing sectors
ONEPREDICT
Manufacturing & Processing
Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries
ALGBIO
Manufacturing & Processing
ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.
FutureOn
Energy & Power
FutureOn — FutureOn's FieldTwin creates a dynamic and 3D geospatial common data environment across surface, subsea, and subsurface domains, with open API connectivity into third-party tools and existing customer workflows.
The way the world makes energy, materials, and food is changing — and the next decade will decide whether that change makes life better: more energy with fewer emissions, more industry with cleaner air, more good jobs.
That future comes from entrepreneurs — the heroes who turn ideas into real products, real companies, and the jobs of the future. And the ones who make it are the ones with a community behind them.
For 15 years, Greentown has been that community — leaning in with the space, the people, the funding, and the first customers they need. Get behind the entrepreneurs building our future.
Our Startups Have Raised Over $0B
All-time
0
Currently home to
0
0+
Countries Where
Startups Operate
0
New Jobs Created by Our Members, and Counting
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.
Explore Investing
Tap into deal flow with the world’s largest community of climate and energy startups.