[ 01 ]About Us

Rallying the world around the people who are changing it.

Climate change is one of the greatest transformation opportunities in human history. The question is how fast we can move.

Wind turbines on a vast landscape at golden hour
[ 02 ]The Opportunity

The way the world makes energy, builds cities, moves goods, grows food, and runs industry didn't happen by accident.

It was built—deliberately, incrementally, over centuries—into the interlocking systems that power modern life.

And it can be rebuilt, better and faster than ever before.

Greentown member working in the prototyping lab
Entrepreneur working at a fume hood in a prototyping lab
Greentown community gathering

The technologies to transform these systems already exist.

The entrepreneurs building them are already hard at work.

What they need now is the infrastructure, community, and ecosystem to move faster.

That’s what Greentownis here to do.

Geothermal energy plant nestled in a volcanic landscape
[ 03 ]Our Mission

Greentown’s mission is to help climate and energy entrepreneurs bring their technologies into the world and to scale faster, delivering more energy, fewer emissions, and the good jobs of the future.

[ 04 ]Our Approach

The most powerful force in climate and energy? Entrepreneurs.

But breakthroughs do not scale on their own. They need the right ecosystem around them.

Greentown brings that ecosystem together. So startups can move faster from breakthrough to market.

Greentown ecosystem: startups at the center surrounded by corporates, academia, investors, experts, philanthropy, and government entities
[ 05 ]Our Values

Entrepreneurs move faster at Greentown

The principles that shape how we show up for founders, partners, and each other.
Greentown member working in the prototyping lab

Place

Purpose-built labs and infrastructure for prototyping and R&D, located in the global hubs where industry is already moving.

Greentown members collaborating around a table

People

The world's largest and most interconnected community of climate and energy innovators. Because founders go further when they're not going it alone.

Founders presenting to a group of investors and partners

Programs

Structured pathways to customers, capital, and pilots that compress the distance between a promising technology and a transformed market.

Greentown summit attendees networking in the lobby

Purpose

Grit, urgency, and an unshakeable belief that the impossible is closer than it looks. Especially when you're working on it together.

[ 06 ]Community Voices

What our community has to say about Greentown

Greentown represents what's possible when bold founders are given the space, support, and community to tackle the world's hardest climate challenges. It's not just an incubator—it's a catalyst for real, scalable change.

John Arnold
Co-Founder & Co-Chair of Arnold Ventures
John Arnold

When you get a coffee, I think the most magical question that you can ask another founder is, 'How's progress?' It opens a floodgate of information back and forth of helping each other. What's at the heart of it is you enter into a world where you're not alone.

Sam White
Co-founder of Greentown & of Promethean Power Systems
Sam White

This community has the rare ability to compress years of learning into months. Founders don't just borrow each other's playbooks — they rewrite them together, in real time.

Emily Reichert
Former CEO, Greentown Labs
Emily Reichert

The first prototype we ran in the lab was a Frankenstein of borrowed equipment and free advice from the bench next door. None of that exists outside of Greentown.

Marcus Chen
Founder & CEO, GridFlow Energy
Marcus Chen

Greentown is where I find the founders other investors haven't met yet. The signal-to-noise here is unmatched — every conversation moves something forward.

Priya Ramaswamy
Partner, Energy Impact Partners
Priya Ramaswamy

Greentown represents what's possible when bold founders are given the space, support, and community to tackle the world's hardest climate challenges. It's not just an incubator—it's a catalyst for real, scalable change.

John Arnold
Co-Founder & Co-Chair of Arnold Ventures
John Arnold

When you get a coffee, I think the most magical question that you can ask another founder is, 'How's progress?' It opens a floodgate of information back and forth of helping each other. What's at the heart of it is you enter into a world where you're not alone.

Sam White
Co-founder of Greentown & of Promethean Power Systems
Sam White

This community has the rare ability to compress years of learning into months. Founders don't just borrow each other's playbooks — they rewrite them together, in real time.

Emily Reichert
Former CEO, Greentown Labs
Emily Reichert

The first prototype we ran in the lab was a Frankenstein of borrowed equipment and free advice from the bench next door. None of that exists outside of Greentown.

Marcus Chen
Founder & CEO, GridFlow Energy
Marcus Chen

Greentown is where I find the founders other investors haven't met yet. The signal-to-noise here is unmatched — every conversation moves something forward.

Priya Ramaswamy
Partner, Energy Impact Partners
Priya Ramaswamy

Greentown represents what's possible when bold founders are given the space, support, and community to tackle the world's hardest climate challenges. It's not just an incubator—it's a catalyst for real, scalable change.

John Arnold
Co-Founder & Co-Chair of Arnold Ventures
John Arnold

When you get a coffee, I think the most magical question that you can ask another founder is, 'How's progress?' It opens a floodgate of information back and forth of helping each other. What's at the heart of it is you enter into a world where you're not alone.

Sam White
Co-founder of Greentown & of Promethean Power Systems
Sam White

This community has the rare ability to compress years of learning into months. Founders don't just borrow each other's playbooks — they rewrite them together, in real time.

Emily Reichert
Former CEO, Greentown Labs
Emily Reichert

The first prototype we ran in the lab was a Frankenstein of borrowed equipment and free advice from the bench next door. None of that exists outside of Greentown.

Marcus Chen
Founder & CEO, GridFlow Energy
Marcus Chen

Greentown is where I find the founders other investors haven't met yet. The signal-to-noise here is unmatched — every conversation moves something forward.

Priya Ramaswamy
Partner, Energy Impact Partners
Priya Ramaswamy

Greentown represents what's possible when bold founders are given the space, support, and community to tackle the world's hardest climate challenges. It's not just an incubator—it's a catalyst for real, scalable change.

John Arnold
Co-Founder & Co-Chair of Arnold Ventures
John Arnold

When you get a coffee, I think the most magical question that you can ask another founder is, 'How's progress?' It opens a floodgate of information back and forth of helping each other. What's at the heart of it is you enter into a world where you're not alone.

Sam White
Co-founder of Greentown & of Promethean Power Systems
Sam White

This community has the rare ability to compress years of learning into months. Founders don't just borrow each other's playbooks — they rewrite them together, in real time.

Emily Reichert
Former CEO, Greentown Labs
Emily Reichert

The first prototype we ran in the lab was a Frankenstein of borrowed equipment and free advice from the bench next door. None of that exists outside of Greentown.

Marcus Chen
Founder & CEO, GridFlow Energy
Marcus Chen

Greentown is where I find the founders other investors haven't met yet. The signal-to-noise here is unmatched — every conversation moves something forward.

Priya Ramaswamy
Partner, Energy Impact Partners
Priya Ramaswamy
[ 07 ]Our Impact

15 Years of Impact

Startups Incubated

Startups Incubated at Greentown

0+

Capital Mobilized

Our Startups Have Raised Over $0B+

2011Now
Careers

0+

Jobs Created

Resilience

0%

88 percent of startups still in business

Of our Startups are Still in Business

Current Members

Current Members

0+

[ 08 ]The Power of Place

Two incubators. Two epicenters. One network.

Individually, each location punches above its weight. Together, they’re the foundation of something much bigger: a connected, self-reinforcing global network of innovation ecosystems that compound over time, across cities, and across systems, pulling the future forward faster.
Greentown Boston incubator interior
Boston

The climatetech innovation capital of the world

A dense ecosystem of founders, researchers, world-class universities, and climate-focused investors at the forefront of what's next.

Learn More
Greentown Houston incubator exterior
Houston

The energy transition capital of the world

The energy transition capital of the world — home to the industry giants, infrastructure, workforce, and capital that carry new technologies from pilot to global deployment.

Learn More
[ 09 ]Our 2035 Vision

Greentown was built on the belief that entrepreneurs can change the world. Fifteen years in, that belief is stronger than ever.

Our vision is simple but ambitious: expand into a connected network of locally rooted, globally linked communities.

The pace of this transformation matters as much as its direction. And now is the moment to accelerate it.

Greentown's global network of incubators across Boston, Houston, the EU, and APAC
Greentown founders gathered at an early community event
History

How Greentown got started

Fifteen years ago, a group of founders bet that a sense of community could change the trajectory of their companies. Turns out they were right.

Our History
The Greentown team in the office
Team

Meet the people behind Greentown

Behind every thriving founder community is a team that genuinely cares. Meet ours.

Our Team
[ 10 ]Donate

This work doesn’t happen without support.

If you believe in the power of entrepreneurship to drive systematic transformation, there’s a place for you here.