Helping climatetech startupsTransformindustry faster
Type One Energy
Energy & Power
SeebeckCell Technologies
Manufacturing & Processing
SeebeckCell Technologies — develops and manufactures liquid-based thermoelectric modules, power generators, and waste heat recovery systems.
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Emerald Cities Collaborative
Infrastructure & Construction
WindRays Energy LLC
Energy & Power
WindRays Energy LLC — develops new models of wind energy designs to make widespread implementation in densely populated areas more efficient and profitable.
eologix sensor technology
Energy & Power
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Hunt Energy Enterprises
Energy & Power
Arbor Energy Holdings Inc
Energy & Power
Digital-energy platform to help homeowners live more sustainably
CalWave Power Technologies
Energy & Power
CalWave — CalWave’s mission is to unlock the vast and steady carbon-free power from ocean waves, bringing superior power-generating technology to market with a global reach. CalWave’s proprietary wave energy converter technology achieves high performance while surviving storms and extreme conditions.
Fysikes Biosolutions
Energy & Power
Fysikes Biosolutions — develops renewable green fuels (methanol, ammonia, and naphtas) via the production of hydrogen and concentrated CO2 from direct air capture and industrial CO2 capture technologies.
RepAir Carbon
Manufacturing & Processing
RepAir - the most efficient, scalable and affordable carbon capture solution, designed for the gigaton scale
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Applied Gaia
Food, Water, & Land
Sequestering carbon in the soil
Stork, a Fluor Company
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
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
Type One Energy
Energy & Power
SeebeckCell Technologies
Manufacturing & Processing
SeebeckCell Technologies — develops and manufactures liquid-based thermoelectric modules, power generators, and waste heat recovery systems.
Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors
Emerald Cities Collaborative
Infrastructure & Construction
WindRays Energy LLC
Energy & Power
WindRays Energy LLC — develops new models of wind energy designs to make widespread implementation in densely populated areas more efficient and profitable.
eologix sensor technology
Energy & Power
Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories
Florrent
Food, Water, & Land
High-energy-density supercapacitors for energy storage, made from domestic biomass waste
Hunt Energy Enterprises
Energy & Power
Arbor Energy Holdings Inc
Energy & Power
Digital-energy platform to help homeowners live more sustainably
CalWave Power Technologies
Energy & Power
CalWave — CalWave’s mission is to unlock the vast and steady carbon-free power from ocean waves, bringing superior power-generating technology to market with a global reach. CalWave’s proprietary wave energy converter technology achieves high performance while surviving storms and extreme conditions.
Fysikes Biosolutions
Energy & Power
Fysikes Biosolutions — develops renewable green fuels (methanol, ammonia, and naphtas) via the production of hydrogen and concentrated CO2 from direct air capture and industrial CO2 capture technologies.
RepAir Carbon
Manufacturing & Processing
RepAir - the most efficient, scalable and affordable carbon capture solution, designed for the gigaton scale
Innovator Energy
Energy & Power
Developing and deploying solutions in cooling, heating, and heat transfer
Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials
Applied Gaia
Food, Water, & Land
Sequestering carbon in the soil
Stork, a Fluor Company
Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact
HKG Energy
Energy & Power
Silicon materials that increase battery energy density
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
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Visolis
Infrastructure & Construction
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
EVLO Energy Storage
Energy & Power
7Analytics
Infrastructure & Construction
7Analytics is a climate-tech startup developing superior high-precision predictive models for floods, enhancing urban resilience to climate change. Our mission is to empower asset owners, insurance companies and governance with the tools needed to mitigate the impacts of extreme weather events.
Black Girls Do Engineer
Manufacturing & Processing
Black Girls Do Engineer Corporation - provides girls and young women ages 6 to 21 with mentoring, personal growth regimens, STEM projects and activities, STEM challenges, and guidance on career paths based on insight from professionals that are leaders in the STEM industry. The goal is to provide access, awareness, and advocate for two million Black-American girls to pursue STEM careers by the year 2050. The organization was created with the concern that Black-American girls and young women are not choosing STEM related careers, and their passion is to change the narrative and fix this issue.
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
CGIS
Energy & Power
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.
frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse
Night Vision Technology Solutions (NVTS)
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Hertha Metals Inc.
Energy & Power
REVOLUTION Turbine Technologies
Energy & Power
REVOLUTION Turbine Technologies (RTT) — is the clean energy partner for oil & gas operators ready to leverage smart waste-energy recovery to generate emission-free power for remote operations. RTT is meeting the most demanding power generation challenges of today and tomorrow with a highly experienced team of entrepreneurs, technology developers, and innovators.
Greentown Labs
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
Nth Cycle
Manufacturing & Processing
Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings
Visolis
Infrastructure & Construction
HEXAspec
Energy & Power
Thermal management solutions for semiconductor chips, enabling more powerful hardware
Dottir Labs
Food, Water, & Land
Sensor technology that provides real-time, detailed chemical analysis of water
Teknobuilt
Infrastructure & Construction
Cloud-based construction project management software
EVLO Energy Storage
Energy & Power
7Analytics
Infrastructure & Construction
7Analytics is a climate-tech startup developing superior high-precision predictive models for floods, enhancing urban resilience to climate change. Our mission is to empower asset owners, insurance companies and governance with the tools needed to mitigate the impacts of extreme weather events.
Black Girls Do Engineer
Manufacturing & Processing
Black Girls Do Engineer Corporation - provides girls and young women ages 6 to 21 with mentoring, personal growth regimens, STEM projects and activities, STEM challenges, and guidance on career paths based on insight from professionals that are leaders in the STEM industry. The goal is to provide access, awareness, and advocate for two million Black-American girls to pursue STEM careers by the year 2050. The organization was created with the concern that Black-American girls and young women are not choosing STEM related careers, and their passion is to change the narrative and fix this issue.
GigaDAC
Energy & Power
Direct air capture optimized for gigaton scale
CGIS
Energy & Power
Kauel
Energy & Power
Software that detects industrial threats to prevent environmental risks and catastrophes
String Data Motion
Infrastructure & Construction
Agentic AI for energy companies. Agents in motion. Outcomes delivered.
frakktal
Manufacturing & Processing
Biobased polymer process to upend PVC overuse
Night Vision Technology Solutions (NVTS)
Ecobrew
Food, Water, & Land
Recycling clean CO₂ at the source for a circular supply, local reuse, or sale
Ocean Visuals
Food, Water, & Land
Patented hyper-spectral LiDAR for real-time detection of oil and organics
Hertha Metals Inc.
Energy & Power
REVOLUTION Turbine Technologies
Energy & Power
REVOLUTION Turbine Technologies (RTT) — is the clean energy partner for oil & gas operators ready to leverage smart waste-energy recovery to generate emission-free power for remote operations. RTT is meeting the most demanding power generation challenges of today and tomorrow with a highly experienced team of entrepreneurs, technology developers, and innovators.
Greentown Labs
Highland Park Technologies
Infrastructure & Construction
Insulated cladding and building envelope retrofits at a fraction of the cost
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
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Startups Operate
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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.
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