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Dear Friends of Greentown,

Thank you to the more than one thousand of you who joined our Climatetech Summit earlier this month!

In Houston, speakers framed the current moment as “Climatetech 3.0”—an era where climate technologies must stand on their own economics. With a keynote fireside with philanthropist John Arnold, remarks from Houston Mayor John Whitmire, and dynamic panels on affordability, reliability, and competitiveness, the program underscored Houston’s role as a hub for scaling cost-effective climatetech solutions.

In Boston, the summit explored the “power of ‘and’” through keynotes, book launches, and startup lightning pitches—linking Massachusetts’ legacy of innovation to the next wave of climate and energy ventures. Highlights included a fireside chat with Massachusetts Secretary of Economic Development Eric Paley and GE Vernova CTO Krishna Jonnalagadda and a packed startup showcase in the prototyping lab.

Together, the two events brought entrepreneurs, corporate partners, investors, and policymakers through our hubs to connect directly with Greentown startups, see technologies firsthand, and explore new paths to collaboration.

Weren’t able to attend but want to dive deeper into programming from both days? Read our full recaps below, complete with session recordings!

HOUSTON RECAP:
Greentown Houston’s 2025 Climatetech Summit Dives into ‘Climatetech 3.0’

BOSTON RECAP:
Greentown Boston’s 2025 Climatetech Summit Explores the Power of ‘And’ in Scaling Tech

Warmly,
The Greentown Team

Giving Tuesday is Coming Up—Double Your Impact!

Giving Tuesday is Dec. 2! As a nonprofit, Greentown needs your help to power the entrepreneurs who are developing real solutions for a clean, sustainable future.

That’s why we’re inviting you to join #FuelTheFuture, whether by making a gift or starting your own fundraising page. Every dollar raised fuels what founders need most—from new prototyping tools to crucial programming.

A generous donor is matching all donations up to $30,000, meaning your gift will be doubled!

DONATE TODAY

Apply Now: Go Build 2026 with Amazon

Greentown Go Build 2026 with Amazon—and in collaboration with the Global CO₂ Initiative at the University of Michigan—is accepting startup applications through Jan. 9, 2026!

Go Build 2026 is accelerating the decarbonization of the built environment by advancing CO₂-mineralization technologies that turn captured carbon into aggregate for concrete—driving down embodied emissions in construction.

Selected startups will benefit from:

A structured accelerator platform for testing and exploration with Amazon
Desk space at Greentown for the duration of the program
Access to entrepreneur-focused programming and networking events
A needs-based stipend to support participation

LEARN MORE + APPLY BY JAN. 9

Mark Your Calendar for These Upcoming Events

Dec. 4: Resiliency + Adaptation Sector Pitch Day [Ion Houston]

Resilience + Adaptation Sector Pitch Day—a special, public iteration of Greentown’s typically invite-only Sector Pitch Day series—will be hosted at the Ion!

The event will convene leading startups, corporates, and investors to explore solutions that strengthen infrastructure, enhance climate risk preparedness, and build long-term resilience, with the goal of catalyzing high-impact partnerships and investments.

Featured startups include BiaTech, Kauel, Decimetrix, REON Technology, change:Water Labs, Harmony Desalting, Mithril Technologies, SkyH2O, Wise Energie, and HGenium.

Dec. 4: Carbon to Value Initiative Year 5 Kickoff [Greentown Boston]

Meet 10 startups shaping the future of carbontech to kick off Year 5 of the Carbon to Value Initiative: Arbon, Cella Mineral Storage, ICODOS, Lite-1, Mission Zero Technologies, Octavia Carbon, Rushnu, Sora Fuel, Turnover Labs, and Universal Matter!

Recent Reads

We were honored to have Greentown Houston named Incubator/Accelerator of the Year at InnovationMap's 2025 Houston Innovation Awards!

And congratulations to our member Mars Materials on taking home the Minority-Founded Business Award.

Curbside EV-charging in Los Angeles, a history-making lithium-ion battery cleanup, and the world’s first commercial agreement for deploying a megawatt-scale solid-state generator.

Check out our startups’ latest news.

From our member Sorin Grama, CEO of Transaera: why humidity matters for air-conditioning efficiency, and what it has to do with this year’s Nobel Prize in chemistry.

External Newsletter — November 2025

From The Ecosystem

External Newsletter — November 2025