Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

Radical Plastics logo

Radical Plastics

Manufacturing & Processing

Radical Plastics — is commercializing a patented technology for producing economical, biodegradable plastics that are a drop-in replacement for conventional, persistent plastics.

Earthbond logo

Earthbond

Energy & Power

Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.

CZAR Power logo

CZAR Power

Energy & Power

Catalyxx logo

Catalyxx

Manufacturing & Processing

Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Carbfix logo

Carbfix

Manufacturing & Processing

Verne logo

Verne

Energy & Power

Verne — develops hydrogen storage systems for zero-emission heavy-duty trucks.

ZS2 Technologies logo

ZS2 Technologies

Manufacturing & Processing

ZS2 Technologies (Calgary, AB) creates magnesium-based advanced building products that can store up to 20 wt.% CO2 from proprietary carbon capture technology.

PolyQor (Innova8e) logo

PolyQor (Innova8e)

Manufacturing & Processing

Concept Loop is dedicated to repurposing low-value post-industrial and post-consumer plastic waste into sustainable building materials. Our flagship product, EcoGrete, is used in the production of high-strength paver blocks and tiles, offering an eco-friendly solution while reducing environmental impact.

Ohmium International logo

Ohmium International

Energy & Power

Liquid-Charge logo

Liquid-Charge

Energy & Power

Liquid-Charge — will manufacture mobile Solid Oxide Fuel Cell (SOFC) range extenders for battery electric vehicles, using them to trickle-charge batteries while effortlessly retaining CO2 for sequestration and recycling.

Transaera logo

Transaera

Infrastructure & Construction

Ultra-efficient air conditioning using a novel desiccant material

SeebeckCell Technologies logo

SeebeckCell Technologies

Manufacturing & Processing

SeebeckCell Technologies — develops and manufactures liquid-based thermoelectric modules, power generators, and waste heat recovery systems.

Accion Systems logo

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.

Nexus Circular logo

Nexus Circular

Manufacturing & Processing

MissionPoint Capital Partners logo

MissionPoint Capital Partners

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

Thiozen logo

Thiozen

Manufacturing & Processing

Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen

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.

Armeta logo

Armeta

Armeta AI is the structured data layer for industrial facilities, turning legacy P&IDs into Material Take-Offs and EPA/OSHA regulatory inventories that power brownfield retrofits, LDAR programs, and energy transition projects across the installed base.

SpringCycle Energy logo

SpringCycle Energy

Energy & Power

Rechargeable iron fuel to transform solar into baseload power

Radical Plastics logo

Radical Plastics

Manufacturing & Processing

Radical Plastics — is commercializing a patented technology for producing economical, biodegradable plastics that are a drop-in replacement for conventional, persistent plastics.

Earthbond logo

Earthbond

Energy & Power

Earthbond — is a platform that connects urban Nigerians with affordable financing for clean, reliable energy. They leverage group financing and carbon accounting to lower costs and risk in the energy transition of Nigeria’s $14B fuel-based, off-grid generator market.

CZAR Power logo

CZAR Power

Energy & Power

Catalyxx logo

Catalyxx

Manufacturing & Processing

Catalytic tech to turn bio-ethanol into high-value, carbon-negative chemicals

Carbfix logo

Carbfix

Manufacturing & Processing

Verne logo

Verne

Energy & Power

Verne — develops hydrogen storage systems for zero-emission heavy-duty trucks.

ZS2 Technologies logo

ZS2 Technologies

Manufacturing & Processing

ZS2 Technologies (Calgary, AB) creates magnesium-based advanced building products that can store up to 20 wt.% CO2 from proprietary carbon capture technology.

PolyQor (Innova8e) logo

PolyQor (Innova8e)

Manufacturing & Processing

Concept Loop is dedicated to repurposing low-value post-industrial and post-consumer plastic waste into sustainable building materials. Our flagship product, EcoGrete, is used in the production of high-strength paver blocks and tiles, offering an eco-friendly solution while reducing environmental impact.

Ohmium International logo

Ohmium International

Energy & Power

Liquid-Charge logo

Liquid-Charge

Energy & Power

Liquid-Charge — will manufacture mobile Solid Oxide Fuel Cell (SOFC) range extenders for battery electric vehicles, using them to trickle-charge batteries while effortlessly retaining CO2 for sequestration and recycling.

Transaera logo

Transaera

Infrastructure & Construction

Ultra-efficient air conditioning using a novel desiccant material

SeebeckCell Technologies logo

SeebeckCell Technologies

Manufacturing & Processing

SeebeckCell Technologies — develops and manufactures liquid-based thermoelectric modules, power generators, and waste heat recovery systems.

Accion Systems logo

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.

Nexus Circular logo

Nexus Circular

Manufacturing & Processing

MissionPoint Capital Partners logo

MissionPoint Capital Partners

Cella Mineral Storage logo

Cella Mineral Storage

Manufacturing & Processing

Turning volcanic formations into reliable, low-cost CO₂ storage

Thiozen logo

Thiozen

Manufacturing & Processing

Chemical waste-to-hydrogen cycle that removes hydrogen sulfide from gas streams and generates zero-emission hydrogen

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.

Armeta logo

Armeta

Armeta AI is the structured data layer for industrial facilities, turning legacy P&IDs into Material Take-Offs and EPA/OSHA regulatory inventories that power brownfield retrofits, LDAR programs, and energy transition projects across the installed base.

BERKM logo

BERKM

Manufacturing & Processing

Biosfera logo

Biosfera

Manufacturing & Processing

ALGBIO logo

ALGBIO

Manufacturing & Processing

ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.

ONEPREDICT logo

ONEPREDICT

Manufacturing & Processing

Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries

Onboard Data logo

Onboard Data

Infrastructure & Construction

Onboard — offers software analytics for HVAC service providers.

Solomon Group logo

Solomon Group

Energy & Power

Solomon Group LLC — delivers solutions for engaging diverse communities, whether urban or rural, with workforce development, language access planning and energy efficiency infrastructure solutions in order to drive understanding and adoption of clean energy and energy-efficiency benefits and opportunities available to the general public.

Ranger Solar logo

Ranger Solar

Energy & Power

Solar Mantle logo

Solar Mantle

Infrastructure & Construction

Film that reflects sunlight for energy-free passive cooling of structures

Infranergy logo

Infranergy

Energy & Power

OhmConnect logo

OhmConnect

Energy & Power

OhmConnect improve the lives of people and the health of the planet by reimagining the way we (collectively) use energy.

IncentiFind logo

IncentiFind

Infrastructure & Construction

ConnectDER logo

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.

Appollo Wind Technologies logo

Appollo Wind Technologies

Infrastructure & Construction

Candid Intelligence logo

Candid Intelligence

Infrastructure & Construction

Accelerating pre-construction engineering with Agentic AI

Stork, a Fluor Company logo

Stork, a Fluor Company

AtmoSpark Technologies logo

AtmoSpark Technologies

Food, Water, & Land

Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations

Boronite logo

Boronite

Manufacturing & Processing

Dottir Labs logo

Dottir Labs

Food, Water, & Land

Sensor technology that provides real-time, detailed chemical analysis of water

Rivsal Holdings logo

Rivsal Holdings

Energy & Power

RIVSAL accelerates industrial growth with patented water-powered, onsite energy - delivering power in months, not years.

Hyperframe logo

Hyperframe

Infrastructure & Construction

BERKM logo

BERKM

Manufacturing & Processing

Biosfera logo

Biosfera

Manufacturing & Processing

ALGBIO logo

ALGBIO

Manufacturing & Processing

ALGBIO — treats wastewater and captures CO2 with microalgae to produce biofuels, bioplastics, biomaterials and generate carbon credits.

ONEPREDICT logo

ONEPREDICT

Manufacturing & Processing

Predicting and diagnosing the status of key industrial assets for the energy and manufacturing industries

Onboard Data logo

Onboard Data

Infrastructure & Construction

Onboard — offers software analytics for HVAC service providers.

Solomon Group logo

Solomon Group

Energy & Power

Solomon Group LLC — delivers solutions for engaging diverse communities, whether urban or rural, with workforce development, language access planning and energy efficiency infrastructure solutions in order to drive understanding and adoption of clean energy and energy-efficiency benefits and opportunities available to the general public.

Ranger Solar logo

Ranger Solar

Energy & Power

Solar Mantle logo

Solar Mantle

Infrastructure & Construction

Film that reflects sunlight for energy-free passive cooling of structures

Infranergy logo

Infranergy

Energy & Power

OhmConnect logo

OhmConnect

Energy & Power

OhmConnect improve the lives of people and the health of the planet by reimagining the way we (collectively) use energy.

IncentiFind logo

IncentiFind

Infrastructure & Construction

ConnectDER logo

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.

Appollo Wind Technologies logo

Appollo Wind Technologies

Infrastructure & Construction

Candid Intelligence logo

Candid Intelligence

Infrastructure & Construction

Accelerating pre-construction engineering with Agentic AI

Stork, a Fluor Company logo

Stork, a Fluor Company

AtmoSpark Technologies logo

AtmoSpark Technologies

Food, Water, & Land

Atmospheric-water-generation systems that provide freshwater to those with limited access or in remote locations

Boronite logo

Boronite

Manufacturing & Processing

Dottir Labs logo

Dottir Labs

Food, Water, & Land

Sensor technology that provides real-time, detailed chemical analysis of water

Rivsal Holdings logo

Rivsal Holdings

Energy & Power

RIVSAL accelerates industrial growth with patented water-powered, onsite energy - delivering power in months, not years.

Hyperframe logo

Hyperframe

Infrastructure & Construction

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