Helping climatetech startupsTransformindustry

[ 02 ]Our Startups

Our Member Companies

View All Startups
Ohmium International logo

Ohmium International

Energy & Power

SensorEra logo

SensorEra

Food, Water, & Land

SensorEra — provides real time induced seismic monitoring service for unconventional oil and gas production, salt water disposal and carbon injection and sequestration for CCUS.

Endeavor Composites logo

Endeavor Composites

Manufacturing & Processing

Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry

Keystone Tower Systems logo

Keystone Tower Systems

Energy & Power

CemCycle logo

CemCycle

Manufacturing & Processing

Gaia AI logo

Gaia AI

Food, Water, & Land

Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision

Piaggio Fast Forward logo

Piaggio Fast Forward

Transportation & Logistics

Synergetic LLC logo

Synergetic LLC

Energy & Power

Synergetic — facilitates infrastructure solutions that unlock and unleash the power of renewables and eliminate or minimize obstacles to rapid renewable energy development and use in congested electricity markets.

Kanin Energy logo

Kanin Energy

Energy & Power

Monetizing industrial waste heat with reduced deployment risk via third-party financing

Skyre logo

Skyre

Manufacturing & Processing

Upgraid logo

Upgraid

Infrastructure & Construction

AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals

DrinKicks logo

DrinKicks

Food, Water, & Land

Repurposing food waste and recycled materials into shoes

Titan Advanced Energy Solutions logo

Titan Advanced Energy Solutions

Energy & Power

Advanced battery management systems for lithium-ion batteries

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

Fysikes Biosolutions logo

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.

Medley Thermal logo

Medley Thermal

Energy & Power

Medley Thermal — links clean, cheap power to steam heating systems, lowering a customer's energy costs and carbon emissions.

ALLY Energy logo

ALLY Energy

Infrastructure & Construction

ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.

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.

Stepwise logo

Stepwise

Energy & Power

Stepwise — makes home electrification effortless and affordable by reducing the infrastructure upgrades costs associated with installations and helping homeowners save money on their electricity bills through energy management.

Sealed logo

Sealed

Infrastructure & Construction

Ohmium International logo

Ohmium International

Energy & Power

SensorEra logo

SensorEra

Food, Water, & Land

SensorEra — provides real time induced seismic monitoring service for unconventional oil and gas production, salt water disposal and carbon injection and sequestration for CCUS.

Endeavor Composites logo

Endeavor Composites

Manufacturing & Processing

Sustainably repurposing landfill-destined post-industrial fibers into semi-finished goods for the composite industry

Keystone Tower Systems logo

Keystone Tower Systems

Energy & Power

CemCycle logo

CemCycle

Manufacturing & Processing

Gaia AI logo

Gaia AI

Food, Water, & Land

Collecting high-quality biomass data in forests with drones, LiDAR, and computer vision

Piaggio Fast Forward logo

Piaggio Fast Forward

Transportation & Logistics

Synergetic LLC logo

Synergetic LLC

Energy & Power

Synergetic — facilitates infrastructure solutions that unlock and unleash the power of renewables and eliminate or minimize obstacles to rapid renewable energy development and use in congested electricity markets.

Kanin Energy logo

Kanin Energy

Energy & Power

Monetizing industrial waste heat with reduced deployment risk via third-party financing

Skyre logo

Skyre

Manufacturing & Processing

Upgraid logo

Upgraid

Infrastructure & Construction

AI and satellite data that diagnose buildings and run energy simulations, to produce ready-to-pitch upgrade proposals

DrinKicks logo

DrinKicks

Food, Water, & Land

Repurposing food waste and recycled materials into shoes

Titan Advanced Energy Solutions logo

Titan Advanced Energy Solutions

Energy & Power

Advanced battery management systems for lithium-ion batteries

Universal Matter Inc. logo

Universal Matter Inc.

Manufacturing & Processing

Producing graphene from carbon waste streams

Fysikes Biosolutions logo

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.

Medley Thermal logo

Medley Thermal

Energy & Power

Medley Thermal — links clean, cheap power to steam heating systems, lowering a customer's energy costs and carbon emissions.

ALLY Energy logo

ALLY Energy

Infrastructure & Construction

ALLY Energy — is an energy tech and human capital services company that offers packaged services and bespoke offerings such as talent engagement, culture development and design, recruitment training and coaching, and consulting.

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.

Stepwise logo

Stepwise

Energy & Power

Stepwise — makes home electrification effortless and affordable by reducing the infrastructure upgrades costs associated with installations and helping homeowners save money on their electricity bills through energy management.

Sealed logo

Sealed

Infrastructure & Construction

AeroShield Materials logo

AeroShield Materials

Infrastructure & Construction

Insulating, porous aerogels for energy-efficient windows

Energy Web Foundation logo

Energy Web Foundation

Energy & Power

Nth Cycle logo

Nth Cycle

Manufacturing & Processing

Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings

Sweetch Energy logo

Sweetch Energy

Energy & Power

Membrane-based technology that taps into osmotic power

Wellbore Consultants logo

Wellbore Consultants

Energy & Power

Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact

Verne logo

Verne

Energy & Power

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

Janta Power logo

Janta Power

Energy & Power

The world’s first 3D solar tower technology

RailPod logo

RailPod

Transportation & Logistics

SWTCH Energy Inc. logo

SWTCH Energy Inc.

Transportation & Logistics

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.

Ranger Solar logo

Ranger Solar

Energy & Power

rStream logo

rStream

Manufacturing & Processing

Autonomous waste-sorting system for non-industrial settings with critical waste volumes

Energiency logo

Energiency

Manufacturing & Processing

LNK Energies logo

LNK Energies

Energy & Power

LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.

Biospheric AI logo

Biospheric AI

Energy & Power

High-resolution, building-level energy demand forecasts for utilities and more

WhaleSpotter logo

WhaleSpotter

Transportation & Logistics

Thermal imaging and AI to prevent marine mammal strikes at sea

Peak Power logo

Peak Power

Energy & Power

Energy-storage optimization software for commercial and industrial customers and energy storage project developers

Vecarius logo

Vecarius

Infrastructure & Construction

Heat-to-electricity technology to boost energy efficiency in mass markets

SepPure Technologies logo

SepPure Technologies

Transportation & Logistics

SepPure — is dramatically reducing energy consumption and pollution globally by enabling the most effective chemical separation at a molecular level, without the traditional use of heat.

Tagup logo

Tagup

Manufacturing & Processing

Tagup — has developed new machine learning methods and a software platform to predict industrial equipment failure, making physical infrastructure safer and more reliable.

AeroShield Materials logo

AeroShield Materials

Infrastructure & Construction

Insulating, porous aerogels for energy-efficient windows

Energy Web Foundation logo

Energy Web Foundation

Energy & Power

Nth Cycle logo

Nth Cycle

Manufacturing & Processing

Using electro-extraction to recover production-grade critical minerals from e-waste, low-grade ore, and mine tailings

Sweetch Energy logo

Sweetch Energy

Energy & Power

Membrane-based technology that taps into osmotic power

Wellbore Consultants logo

Wellbore Consultants

Energy & Power

Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact

Verne logo

Verne

Energy & Power

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

Janta Power logo

Janta Power

Energy & Power

The world’s first 3D solar tower technology

RailPod logo

RailPod

Transportation & Logistics

SWTCH Energy Inc. logo

SWTCH Energy Inc.

Transportation & Logistics

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.

Ranger Solar logo

Ranger Solar

Energy & Power

rStream logo

rStream

Manufacturing & Processing

Autonomous waste-sorting system for non-industrial settings with critical waste volumes

Energiency logo

Energiency

Manufacturing & Processing

LNK Energies logo

LNK Energies

Energy & Power

LNK is an MIT spin-out enabling zero-emission heavy-duty mobility without a price premium.

Biospheric AI logo

Biospheric AI

Energy & Power

High-resolution, building-level energy demand forecasts for utilities and more

WhaleSpotter logo

WhaleSpotter

Transportation & Logistics

Thermal imaging and AI to prevent marine mammal strikes at sea

Peak Power logo

Peak Power

Energy & Power

Energy-storage optimization software for commercial and industrial customers and energy storage project developers

Vecarius logo

Vecarius

Infrastructure & Construction

Heat-to-electricity technology to boost energy efficiency in mass markets

SepPure Technologies logo

SepPure Technologies

Transportation & Logistics

SepPure — is dramatically reducing energy consumption and pollution globally by enabling the most effective chemical separation at a molecular level, without the traditional use of heat.

Tagup logo

Tagup

Manufacturing & Processing

Tagup — has developed new machine learning methods and a software platform to predict industrial equipment failure, making physical infrastructure safer and more reliable.

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