Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Carbonbase logo

Carbonbase

Lasso Labs logo

Lasso Labs

Food, Water, & Land

Using natural proteins to create real texture in alternative foods

SeaDeep logo

SeaDeep

Transportation & Logistics

SeaDeep — revolutionizes underwater assessments with AI-powered subsea vision for inspecting marine environments and substructures in real-time and with high-fidelity using low-cost, off-the-shelf cameras.

Independence Coffee Company logo

Independence Coffee Company

Food, Water, & Land

Our new 100% Compostable Coffee Pods are made with no plastic. They are Fair Trade, Organic and are produced from the best coffee growing regions in the world. Our focus on reduced environmental impacts and 'give-backs' to great local and national causes runs in our DNA. We partner with large corporate, grocery and food service providers to not only distribute our products, but also educate consumers on the importance of sustainable cpg packaging for our earth's future.

Global ROC logo

Global ROC

Food, Water, & Land

Global ROC — provides an innovative technology solution for cooling tower systems that reduces chemical consumption, saves water, and decreases energy costs.

Solarflux logo

Solarflux

Energy & Power

SolarFlux — makes the FOCUS, a parabolic dish concentrator capable of delivering flexible, clean, inexpensive solar thermal power for a wide range of applications.

Topl logo

Topl

Infrastructure & Construction

Topl is an impact technology company building a blockchain that empowers businesses to prove and monetize ethical and sustainable practices.

Community Energy Labs logo

Community Energy Labs

Infrastructure & Construction

Promethean Power Systems logo

Promethean Power Systems

Food, Water, & Land

Promethean Power Systems — has developed and deployed its patented Thermal Battery technology that is being used by over 65,000 farmers in India and Bangladesh to chill their harvested perishable food and milk and get it to the market safely without the need for diesel generators. In addition to village-level cold-storage, Promethean now operates diesel-free reefer trucks using its thermal battery technology that deliver refrigerated food without the need for compressors on its trucks.

Sustainable America logo

Sustainable America

Food, Water, & Land

Phoenix Tailings logo

Phoenix Tailings

Manufacturing & Processing

Waste-free, net-zero, cost-competitive rare-earth-metal refining

Enersion logo

Enersion

Energy & Power

Made of Air logo

Made of Air

Manufacturing & Processing

Mitico logo

Mitico

Energy & Power

C-Quester delivers a solution for carbon capture using dry granular metal carbonate (GMC) purification technology with integrated measurement, reporting, and verification.

Spaero Bio logo

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.

Altaeros logo

Altaeros

Energy & Power

Quantum Diamond Technologies logo

Quantum Diamond Technologies

Manufacturing & Processing

Packetized Energy logo

Packetized Energy

Energy & Power

Vistex Composites logo

Vistex Composites

Manufacturing & Processing

Vistex Composites is a manufacturing innovation company that has developed disruptive technology for the manufacture of advanced composite products. Our patented PFL™ process can be integrated into existing manufacturing plants, or finished products can be manufactured with Vistex's in-house manufacturing team.

Black Mountain Metals logo

Black Mountain Metals

Manufacturing & Processing

Black Mountain Metals is a global battery metals mining company, specifically focused on sustainable nickel and copper mining for lithium ion battery cathodes.

Carbonbase logo

Carbonbase

Lasso Labs logo

Lasso Labs

Food, Water, & Land

Using natural proteins to create real texture in alternative foods

SeaDeep logo

SeaDeep

Transportation & Logistics

SeaDeep — revolutionizes underwater assessments with AI-powered subsea vision for inspecting marine environments and substructures in real-time and with high-fidelity using low-cost, off-the-shelf cameras.

Independence Coffee Company logo

Independence Coffee Company

Food, Water, & Land

Our new 100% Compostable Coffee Pods are made with no plastic. They are Fair Trade, Organic and are produced from the best coffee growing regions in the world. Our focus on reduced environmental impacts and 'give-backs' to great local and national causes runs in our DNA. We partner with large corporate, grocery and food service providers to not only distribute our products, but also educate consumers on the importance of sustainable cpg packaging for our earth's future.

Global ROC logo

Global ROC

Food, Water, & Land

Global ROC — provides an innovative technology solution for cooling tower systems that reduces chemical consumption, saves water, and decreases energy costs.

Solarflux logo

Solarflux

Energy & Power

SolarFlux — makes the FOCUS, a parabolic dish concentrator capable of delivering flexible, clean, inexpensive solar thermal power for a wide range of applications.

Topl logo

Topl

Infrastructure & Construction

Topl is an impact technology company building a blockchain that empowers businesses to prove and monetize ethical and sustainable practices.

Community Energy Labs logo

Community Energy Labs

Infrastructure & Construction

Promethean Power Systems logo

Promethean Power Systems

Food, Water, & Land

Promethean Power Systems — has developed and deployed its patented Thermal Battery technology that is being used by over 65,000 farmers in India and Bangladesh to chill their harvested perishable food and milk and get it to the market safely without the need for diesel generators. In addition to village-level cold-storage, Promethean now operates diesel-free reefer trucks using its thermal battery technology that deliver refrigerated food without the need for compressors on its trucks.

Sustainable America logo

Sustainable America

Food, Water, & Land

Phoenix Tailings logo

Phoenix Tailings

Manufacturing & Processing

Waste-free, net-zero, cost-competitive rare-earth-metal refining

Enersion logo

Enersion

Energy & Power

Made of Air logo

Made of Air

Manufacturing & Processing

Mitico logo

Mitico

Energy & Power

C-Quester delivers a solution for carbon capture using dry granular metal carbonate (GMC) purification technology with integrated measurement, reporting, and verification.

Spaero Bio logo

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.

Altaeros logo

Altaeros

Energy & Power

Quantum Diamond Technologies logo

Quantum Diamond Technologies

Manufacturing & Processing

Packetized Energy logo

Packetized Energy

Energy & Power

Vistex Composites logo

Vistex Composites

Manufacturing & Processing

Vistex Composites is a manufacturing innovation company that has developed disruptive technology for the manufacture of advanced composite products. Our patented PFL™ process can be integrated into existing manufacturing plants, or finished products can be manufactured with Vistex's in-house manufacturing team.

Black Mountain Metals logo

Black Mountain Metals

Manufacturing & Processing

Black Mountain Metals is a global battery metals mining company, specifically focused on sustainable nickel and copper mining for lithium ion battery cathodes.

SpadXTech logo

SpadXTech

Food, Water, & Land

SpadXTech — seeks to significantly reduce CO2 emissions through the manufacturing of various carbon negative cellulose-based materials.

Ensovi logo

Ensovi

Manufacturing & Processing

Cofactor recycling platform for sustainable drug manufacturing

Giner Labs logo

Giner Labs

Energy & Power

At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.

Hibot logo

Hibot

Infrastructure & Construction

Solutions for infrastructures across industries.

Kula Bio logo

Kula Bio

Energy & Power

Kula Bio — supercharges natural nitrogen-fixing microbes with renewable energy in order to deliver reliable, low-cost organic biofertilizers.

Night Vision Technology Solutions (NVTS) logo

Night Vision Technology Solutions (NVTS)

Tomra Systems logo

Tomra Systems

Manufacturing & Processing

Katz Water Technologies logo

Katz Water Technologies

Energy & Power

Katz Water Technologies — recycles their customers’ waste water instead of disposing it and sells the components as valuable materials.

Massachusetts Climatetech Studio logo

Massachusetts Climatetech Studio

Energy & Power

change:WATER Labs logo

change:WATER Labs

Food, Water, & Land

Low-cost, compact, waterless toilet for non-sewered households and communities

Singularity Energy logo

Singularity Energy

Energy & Power

Data and software solutions for grid decarbonization

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Hygen logo

Hygen

Energy & Power

Respire Energy logo

Respire Energy

Energy & Power

Safe, low-cost, and long-duration metal-air battery designed for microgrids

Sheetak logo

Sheetak

Manufacturing & Processing

Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.

Sensible logo

Sensible

Energy & Power

Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC

Aquosmic Corporation logo

Aquosmic Corporation

Energy & Power

Aquosmic — analyzes any body of water using satellite images and can determine biomass as well.

Planckton Data logo

Planckton Data

Manufacturing & Processing

Planckton Data — is making a platform that is built to manage the entire carbon data lifecycle by automating data collection and conversion and producing insights quickly without the need to make extensive changes to existing systems

Voltaware logo

Voltaware

Energy & Power

Voltaware is an AI-powered energy intelligence company that helps utilities, energy innovators, and service providers unlock the full potential of energy data to drive energy efficiency and decarbonization.

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

SpadXTech logo

SpadXTech

Food, Water, & Land

SpadXTech — seeks to significantly reduce CO2 emissions through the manufacturing of various carbon negative cellulose-based materials.

Ensovi logo

Ensovi

Manufacturing & Processing

Cofactor recycling platform for sustainable drug manufacturing

Giner Labs logo

Giner Labs

Energy & Power

At Giner Labs, we focus on developing innovative solutions in electrochemical sensors, electrolyzers, fuel cells, advanced materials, and medical devices. Our goal is to create technologies that have a profound impact on various sectors, including clean energy, medical applications, as well as aerospace and defense.

Hibot logo

Hibot

Infrastructure & Construction

Solutions for infrastructures across industries.

Kula Bio logo

Kula Bio

Energy & Power

Kula Bio — supercharges natural nitrogen-fixing microbes with renewable energy in order to deliver reliable, low-cost organic biofertilizers.

Night Vision Technology Solutions (NVTS) logo

Night Vision Technology Solutions (NVTS)

Tomra Systems logo

Tomra Systems

Manufacturing & Processing

Katz Water Technologies logo

Katz Water Technologies

Energy & Power

Katz Water Technologies — recycles their customers’ waste water instead of disposing it and sells the components as valuable materials.

Massachusetts Climatetech Studio logo

Massachusetts Climatetech Studio

Energy & Power

change:WATER Labs logo

change:WATER Labs

Food, Water, & Land

Low-cost, compact, waterless toilet for non-sewered households and communities

Singularity Energy logo

Singularity Energy

Energy & Power

Data and software solutions for grid decarbonization

GeoTeknica logo

GeoTeknica

Manufacturing & Processing

Hygen logo

Hygen

Energy & Power

Respire Energy logo

Respire Energy

Energy & Power

Safe, low-cost, and long-duration metal-air battery designed for microgrids

Sheetak logo

Sheetak

Manufacturing & Processing

Based in Austin, Texas, Sheetak develops advanced thermoelectric, solid-state cooling, and energy harvesting technologies for high-performance electronics. With expertise in thermoelectric materials, device engineering, and U.S.-based manufacturing, Sheetak provides precision thermal management solutions for applications in photonics, telecommunications, aerospace, defense, computing, and medical systems.

Sensible logo

Sensible

Energy & Power

Compact, refrigerant-free thermoelectric heat pump for quiet, efficient, climate-neutral HVAC

Aquosmic Corporation logo

Aquosmic Corporation

Energy & Power

Aquosmic — analyzes any body of water using satellite images and can determine biomass as well.

Planckton Data logo

Planckton Data

Manufacturing & Processing

Planckton Data — is making a platform that is built to manage the entire carbon data lifecycle by automating data collection and conversion and producing insights quickly without the need to make extensive changes to existing systems

Voltaware logo

Voltaware

Energy & Power

Voltaware is an AI-powered energy intelligence company that helps utilities, energy innovators, and service providers unlock the full potential of energy data to drive energy efficiency and decarbonization.

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

Greentown member working in a wet lab
Greentown community members collaborating
Greentown member pipetting in a lab
Greentown members at work in the incubator
[ 03 ]Who We Are

Greentown is a 501(c)(3) nonprofit helping climate entrepreneurs build faster.

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.

[ 04 ]By The Numbers

Our Impact

Our members aren't just building better ways to operate; they're slashing emissions, boosting efficiency, and transforming how we use resources across the world. Now 15 years and counting, the impact speaks for itself.
Capital Mobilized

Our Startups Have Raised Over $0B

2011Now
Startups Supported

All-time

0

Currently home to

0

Global Footprint

0+

Countries Where
Startups Operate

Jobs Created

0

New Jobs Created by Our Members, and Counting

[ 05 ]Our Partners

Where Industry Meets Innovation

Startups bring the breakthroughs. Corporate partners bring the scale, infrastructure, expertise, and capital to make them matter.

  • Amazon
  • Amrize
  • Aramco
  • BCG
  • Chevron
  • Dassault Systemes
  • Emerson
  • Enel
  • Equinor
  • Foley Hoag
  • Fortescue
  • GeSI
  • GE Vernova
  • OnTerris (fka Montrose)
  • Saint-Gobain
  • Shell
  • TotalEnergies
  • Vinson & Elkins
  • Woodside Energy
For Startups

Apply for Membership

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.

Greentown member prototyping hardware in the lab
For Partners
Greentown partners networking at an event

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.

Explore Partnership
Events
Speaker presenting on stage at a Greentown event

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.

View Calendar
For Investors
Founders and investors connecting at a Greentown incubator

Explore Investing

Tap into deal flow with the world’s largest community of climate and energy startups.

Explore Investing