Helping climatetech startupsTransformindustry faster

Spaero Bio
Infrastructure & Construction
Spaero Bio — enables scientists to quickly and directly automate experiments that are currently done by hand, a bottleneck of life science R&D.

Via Separations
Manufacturing & Processing
Via Separations — is developing a new membrane material to make manufacturing processes more energy efficient—transforming the production of things like fertilizer and nylon, and with the potential to save a gigaton of carbon each year.

CERT Systems
Manufacturing & Processing

Pecos Wind Power
Energy & Power
Pecos Wind Power — is reducing the cost of distributed wind power through the development of an 85kW community-scale wind turbine.

Launch Academy

Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis

NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation

Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials

Embr Labs

Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors

EVLO Energy Storage
Energy & Power

Dexai Robotics
Food, Water, & Land

Pika Energy
Energy & Power

Wiggins Manufacturing & Logistics Consulting
Manufacturing & Processing
Help US manufacturers and supply chain companies design new facilities and Lean out existing ones.

MicroAvionics
Transportation & Logistics

FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings

Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality

Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts

Element Resources
Energy & Power
Developing large-scale green hydrogen projects

Apitronics
Food, Water, & Land

Spaero Bio
Infrastructure & Construction
Spaero Bio — enables scientists to quickly and directly automate experiments that are currently done by hand, a bottleneck of life science R&D.

Via Separations
Manufacturing & Processing
Via Separations — is developing a new membrane material to make manufacturing processes more energy efficient—transforming the production of things like fertilizer and nylon, and with the potential to save a gigaton of carbon each year.

CERT Systems
Manufacturing & Processing

Pecos Wind Power
Energy & Power
Pecos Wind Power — is reducing the cost of distributed wind power through the development of an 85kW community-scale wind turbine.

Launch Academy

Haffner Energy
Energy & Power
Producing renewable energy via waste-biomass thermolysis

NeuroBionics
Manufacturing & Processing
Sustainability-focused device for minimally-invasive endovascular deep-brain stimulation for stroke rehabilitation

Clarity Castle
Infrastructure & Construction
Modular, soundproof work pods made from recycled materials

Embr Labs

Verdicity
Infrastructure & Construction
AI-enabled, customizable smart building, information, and facility services for building vendors

EVLO Energy Storage
Energy & Power

Dexai Robotics
Food, Water, & Land

Pika Energy
Energy & Power

Wiggins Manufacturing & Logistics Consulting
Manufacturing & Processing
Help US manufacturers and supply chain companies design new facilities and Lean out existing ones.

MicroAvionics
Transportation & Logistics

FAST Metals
Manufacturing & Processing
Hydrometallurgical-recovery process for extracting rare-earth elements from industrial tailings

Fresh Inset
Food, Water, & Land
Improving fresh produce’s shelf life, appearance, and quality

Upstream Tech
Energy & Power
Software that expands access to environmental data through remote monitoring and reporting for seasonal forecasts

Element Resources
Energy & Power
Developing large-scale green hydrogen projects

Apitronics
Food, Water, & Land

Starfield
Food, Water, & Land

Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage

Accion Systems
Transportation & Logistics
Accion Systems — develops in-space propulsion technologies that optimize scalability, performance, and efficiency to accelerate the exploration of space. Accion’s flagship product, TILE, uses proprietary electrospray thrusters, bringing electric propulsion to satellites of all sizes and redefining in-space capabilities for the 21st century.

Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability

Riptide Autonomous Solutions
Transportation & Logistics

Gemini Energy
We are building the world first unified system for hydrogen compression and purification at 100% recovery rate and 99.999% purity.

Eos Loan
Energy & Power

ZwitterCo
Food, Water, & Land
Nanofiltration membranes for wastewater treatment with unprecedented fouling-resistance and size-selectivity.

Energy Intelligence
Energy & Power
Energy Intelligence — develops ultra-compact energy harvesting systems that are installed on roads to turn the motion of vehicles into electricity.

Cocoa Potash
Food, Water, & Land

CGIS
Energy & Power

Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market

Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more

Heliotrope Photonics
Energy & Power
Coating technology that enhances solar-panel performance by transforming wasted sunlight

Sol Clarity
Energy & Power
Sol Clarity — Solar panels need cleaning but there’s not enough water for it – with EDS just flip a switch to watch dust disappear. Dust settles, they don’t!

Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories

Spare-it
Manufacturing & Processing
Spare-it — is a catalyst for sustainability in the workplace.

KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues

Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals

Raptor Maps
Energy & Power
AI software to increase solar farm power production, reduce operational risk, and lower costs

Starfield
Food, Water, & Land

Cella Mineral Storage
Manufacturing & Processing
Turning volcanic formations into reliable, low-cost CO₂ storage

Accion Systems
Transportation & Logistics
Accion Systems — develops in-space propulsion technologies that optimize scalability, performance, and efficiency to accelerate the exploration of space. Accion’s flagship product, TILE, uses proprietary electrospray thrusters, bringing electric propulsion to satellites of all sizes and redefining in-space capabilities for the 21st century.

Eden GeoPower
Energy & Power
Electrical Reservoir Stimulation to enhance subsurface permeability

Riptide Autonomous Solutions
Transportation & Logistics

Gemini Energy
We are building the world first unified system for hydrogen compression and purification at 100% recovery rate and 99.999% purity.

Eos Loan
Energy & Power

ZwitterCo
Food, Water, & Land
Nanofiltration membranes for wastewater treatment with unprecedented fouling-resistance and size-selectivity.

Energy Intelligence
Energy & Power
Energy Intelligence — develops ultra-compact energy harvesting systems that are installed on roads to turn the motion of vehicles into electricity.

Cocoa Potash
Food, Water, & Land

CGIS
Energy & Power

Ohm Analytics
Energy & Power
Aggregating clean energy data based on thousands of sources for visibility and intelligence in the U.S. solar market

Biospheric AI
Energy & Power
High-resolution, building-level energy demand forecasts for utilities and more

Heliotrope Photonics
Energy & Power
Coating technology that enhances solar-panel performance by transforming wasted sunlight

Sol Clarity
Energy & Power
Sol Clarity — Solar panels need cleaning but there’s not enough water for it – with EDS just flip a switch to watch dust disappear. Dust settles, they don’t!

Reframe Systems
Infrastructure & Construction
Offsite construction of zero-carbon buildings with volumetric modules manufactured with robotic microfactories

Spare-it
Manufacturing & Processing
Spare-it — is a catalyst for sustainability in the workplace.

KP Labs
Manufacturing & Processing
Modular, biomembrane-based systems for on-site recovery of critical metals from e-waste and industrial residues

Capro-X
Food, Water, & Land
Sustainable biochemicals made from food waste at food production plants, creating alternatives to palm-oil chemicals

Raptor Maps
Energy & Power
AI software to increase solar farm power production, reduce operational risk, and lower costs




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.






















