Investor Program

Where climate change solutions meet ROI

Get investment recommendations based on your priorities

  • Startup introductions: based on your preferred stage, industry, check size, and more
  • Deal Flow Digests: easily review actively fundraising startups
  • Investor newsletters: with fundraising updates, startups that are raising, and upcoming opportunities to engage with entrepreneurs
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Read our members’ latest news

Connect with fellow investors and investment prospects

  • Startup connections: via one-on-one office hours and invite-only networking sessions
  • Investor-investor engagement: to share best practices and deal flow
Learn What We Do
See how your portfolio companies could benefit from Greentown

Showcase your thought leadership and learn from others

  • Startup mentoring: to foster meaningful relationship-building and idea exchange
  • Investor connections: at panels, workshops, and events, including Greentown’s Sector Pitch Days and Investor Speaker Series
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Join the Houston Ion District Investor Activation Program

The Houston Ion District Investor Activation Program is helping build an equitable climatetech industry capable of rapid deployment by addressing a fundamental challenge: the region’s lack of funding for early-stage climatetech startups, and especially for those led by underrepresented founders.

This program from Greentown Labs and the Ion brings early-stage investors from Greater Houston—a region playing a pivotal role in the energy transition—into the fold, offering education on climatetech investing, channeling a pool of capital to young startups, and catalyzing a thriving climatetech investment ecosystem that prioritizes diversity, equity, and inclusion.

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Join the program

Investor Program Case Studies

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The Startup

Greentown member florrent makes ultracapacitors—a crucial piece of the renewable grid—with hemp grown by Black and Indigenous farmers in the U.S. By supporting these growers, florrent says it’s both sequestering carbon in hemp and “sequestering wealth” in the farmers’ communities.

The Investment

florrent met its largest investor, MassVentures, via Greentown’s Deal Flow Digest—an initiative of the incubator’s Investor Program designed to connect fundraising startups with relevant investors.

From the Startup

“Greentown’s been incredibly supportive. The Investor Program has led to so many investor conversations, some of which are already lined up for when we’re ready to raise our seed. MassVentures is a great example: they’re our biggest investor, and that connection was through Greentown Labs.”

From the Investor

“florrent has a strong team; they listen well; and their technology is making the right advances. florrent hits our investment sweet spot and we are grateful to Greentown Labs for bringing the startup to our attention.”

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The Startup

Elemental Recycling, a Greentown Labs member, recycles all plastics and tires to create high-purity graphene, graphite, and hydrogen in a process that’s CO2 equivalent (CO2e) neutral.

The Investment

Elemental Recycling recently raised its Series A, led by Freestone, a portfolio company of Tailwater Capital. Freestone learned about Elemental Recycling through Greentown’s Deal Flow Digest—a core component of our Investor Program that showcases fundraising members to our investor network.

From the Startup

“It’s amazing how many people found us through the Deal Flow Digest.”

From the Investor

“The Deal Flow Digest is a great reference to stay up to date on who in the cleantech venture space is looking for capital and what the latest developments at each company are. It also allows for an easy filter by maturity and fundraising stage (pre-seed through Series B) and allows investors to reach out directly to founders to schedule introductory meetings. The inclusion of their pitch deck also gives more info than would be available on their website, so investors have a bit more info prior to meeting with companies.”