Helping climatetech startupsTransformindustry faster

Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact

CeraPhi Energy
Energy & Power
CeraPhi Energy — is a geothermal energy company developing a “plug and play” scalable technology platform.

Armada AI

Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses

Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies

Top Grain Technologies
Energy & Power
Top Grain Technologies — is commercializing a scalable high-throughput heat treatment solution that imparts a directionally solidified grain structure to additively manufactured (AM) Ni-base superalloys, enabling their use in the most demanding high-temperature applications, from combustion turbines to rocket engines

Blue Line Battery
Energy & Power
Blue Line Battery designs and manufactures more accessible, more efficient, battery technology for industrial applications.

Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining

Return To Vendor
Manufacturing & Processing

Circularise
Manufacturing & Processing

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

SRGE
Infrastructure & Construction
Full-service accelerator to support small and underrepresented-led construction firms

Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption

Revora Materials
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery

GeoTeknica
Manufacturing & Processing

M2X Energy
Manufacturing & Processing

Moonshot Compost
Manufacturing & Processing
Moonshot Compost — collects and consolidates food waste for composting from businesses and residents, with a focus on data creation and management.

10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety

Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns

Pre Framing Corp
Infrastructure & Construction

Wellbore Consultants
Energy & Power
Advanced subsurface stimulation systems to improve resource recovery while reducing energy intensity, water usage, and surface impact

CeraPhi Energy
Energy & Power
CeraPhi Energy — is a geothermal energy company developing a “plug and play” scalable technology platform.

Armada AI

Sparkplug Power
Energy & Power
Energy-storage-as-a-service for municipal utilities and commercial businesses

Kausalyze
Manufacturing & Processing
True root-cause analysis for chemicals, energy, and pharmaceutical companies

Top Grain Technologies
Energy & Power
Top Grain Technologies — is commercializing a scalable high-throughput heat treatment solution that imparts a directionally solidified grain structure to additively manufactured (AM) Ni-base superalloys, enabling their use in the most demanding high-temperature applications, from combustion turbines to rocket engines

Blue Line Battery
Energy & Power
Blue Line Battery designs and manufactures more accessible, more efficient, battery technology for industrial applications.

Phoenix Tailings
Manufacturing & Processing
Waste-free, net-zero, cost-competitive rare-earth-metal refining

Return To Vendor
Manufacturing & Processing

Circularise
Manufacturing & Processing

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

SRGE
Infrastructure & Construction
Full-service accelerator to support small and underrepresented-led construction firms

Massachusetts Materials Technologies
Energy & Power
Seamlessly measuring the mechanical properties of pipelines without interruption

Revora Materials
Energy & Power
Carbon-mineralization technology with high-value minerals and metals recovery

GeoTeknica
Manufacturing & Processing

M2X Energy
Manufacturing & Processing

Moonshot Compost
Manufacturing & Processing
Moonshot Compost — collects and consolidates food waste for composting from businesses and residents, with a focus on data creation and management.

10DQ
Energy & Power
Battery tech for long-duration energy storage at lower costs and improved safety

Sublime Systems
Infrastructure & Construction
Decarbonizing cement-making with an electrochemical process that replaces fossil-fuel-fired kilns

Pre Framing Corp
Infrastructure & Construction

Fervo Energy
Energy & Power
Fervo Energy — is a next-generation geothermal power developer, delivering 24/7 carbon-free energy.

Thalon Materials

Emerald Cities Collaborative
Infrastructure & Construction

Euphree
Transportation & Logistics
Electric bikes made fashionable.

Understory
Infrastructure & Construction
Weather hardware and analytics

Corvus Robotics
Manufacturing & Processing

Public Grid
Energy & Power

Type One Energy
Energy & Power

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.

Enerbrain
Infrastructure & Construction

Skytree
Food, Water, & Land
Skytree — harnesses carbon through the power of decentralized direct air capture technology. They create one of the world’s smallest and simplest circular carbon solution to transform how food is grown to provide cleaner water.

TalkingHeads Wireless
Energy & Power
TalkingHeads Wireless — develops Smart Network Towers, starting with the world’s most energy-efficient remote radio heads (RRH), which is the hardware box that sits at the top of the cell tower.

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

NBD Nano
Manufacturing & Processing
NBD Nano — utilizes biomimicry to create functional and durable surface coatings that improve water collection, transport, and repellency.

SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency

Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design

H2Pro
Energy & Power
H2Pro — is enabling the wide scale adoption of sustainable hydrogen fuel by introducing a novel production technology E-TAC.

LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits

Iron Lattice
Manufacturing & Processing
Building AI memory that powers human potential.

Quantum New Energy
Infrastructure & Construction
Quantum New Energy’s platform, EnerWisely, is a science-based solution that integrates IoT with data analytics and behavioral science. Quantum New Energy helps users transform their unused energy consumption data into personalized, actionable insights to maximize their monetary savings and reduce their environmental impacts.

Fervo Energy
Energy & Power
Fervo Energy — is a next-generation geothermal power developer, delivering 24/7 carbon-free energy.

Thalon Materials

Emerald Cities Collaborative
Infrastructure & Construction

Euphree
Transportation & Logistics
Electric bikes made fashionable.

Understory
Infrastructure & Construction
Weather hardware and analytics

Corvus Robotics
Manufacturing & Processing

Public Grid
Energy & Power

Type One Energy
Energy & Power

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.

Enerbrain
Infrastructure & Construction

Skytree
Food, Water, & Land
Skytree — harnesses carbon through the power of decentralized direct air capture technology. They create one of the world’s smallest and simplest circular carbon solution to transform how food is grown to provide cleaner water.

TalkingHeads Wireless
Energy & Power
TalkingHeads Wireless — develops Smart Network Towers, starting with the world’s most energy-efficient remote radio heads (RRH), which is the hardware box that sits at the top of the cell tower.

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

NBD Nano
Manufacturing & Processing
NBD Nano — utilizes biomimicry to create functional and durable surface coatings that improve water collection, transport, and repellency.

SRECTrade
Energy & Power
Management and transaction platform for environmental commodities to reduce costs and increase transparency

Resolute Methane
Food, Water, & Land
Treating low-concentration methane emissions at the source by thermally oxidizing methane with a novel reactor design

H2Pro
Energy & Power
H2Pro — is enabling the wide scale adoption of sustainable hydrogen fuel by introducing a novel production technology E-TAC.

LOCOAL
Manufacturing & Processing
Turning waste into value, and producing clean energy, biofuels, and carbon credits

Iron Lattice
Manufacturing & Processing
Building AI memory that powers human potential.

Quantum New Energy
Infrastructure & Construction
Quantum New Energy’s platform, EnerWisely, is a science-based solution that integrates IoT with data analytics and behavioral science. Quantum New Energy helps users transform their unused energy consumption data into personalized, actionable insights to maximize their monetary savings and reduce their environmental impacts.




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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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.

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