ADVERTISEABOUT USSUBMIT A STORYSUBSCRIBETERMS OF USEPRIVACY POLICY
Visit our family of Brands

40+ climatetech startups join Greentown, including a dozen from Houston

green team

Twelve local startups have joined Greentown Houston, along with others from around the world. Photo courtesy Greentown Labs.

More than 40 climatetech startups joined the Greentown Labs Houston community in the second half of 2025. Twelve hail from the Bayou City.

The companies are among a group of nearly 70 that joined the climatetech incubator, which is co-located in Houston and Boston, in Q3 and Q4.

The new companies that have joined the Houston incubator specialize in a variety of clean energy applications, from green hydrogen-producing water-splitting cycles to drones that service wind turbines.

The local startups that joined Greentown Houston include:

  • Houston-based Wise Energie, which delivers turnkey microgrids that blend vertical-axis wind, solar PV, and battery storage into a single, silent system.
  • The Woodlands-based Resollant, which is developing compact, zero-emissions hydrogen and carbon reactors to provide low-cost, scalable clean hydrogen and high-purity carbon for the energy and manufacturing sectors.
  • Houston-based ClarityCastle, which designs and manufactures modular, soundproof work pods that replace traditional drywall construction with reusable, low-waste alternatives made from recycled materials.
  • Houston-based WattSto Energy, which manufactures vanadium redox flow batteries to deliver long-duration storage for both grid-scale projects and off-grid microgrids.
  • Houston-based AMPeers, which delivers advanced, high-temperature superconductors in the U.S. at a fraction of traditional costs.
  • Houston-based Biosimo, which is developing bio-based platform chemicals, pioneering sustainable chemistry for a healthier planet and economy.
  • Houston-based Ententia, which offers purpose-built, generative AI for industry.
  • Houston-based GeoKiln Energy Innovation, which is developing a new way to produce clean hydrogen by accelerating natural geologic reactions in iron-rich rock formations using precision electrical heating.
  • Houston-based Timbergrove, which builds AI and IoT solutions that connect and optimize assets—boosting visibility, safety, and efficiency.
  • Houston-based dataVediK, which combines energy-domain expertise with advanced machine learning and intelligent automation to empower organizations to achieve operational excellence and accelerate their sustainability goals.
  • Houston-based Resonant Thermal Systems, which uses a resonant energy-transfer (RET) system to extract critical minerals from industrial and natural brines without using membranes or grid electricity.
  • Houston-based Torres Orbital Mining (TOM),which develops autonomous excavation systems for extreme environments on Earth and the moon, enabling safe, data-driven resource recovery and laying the groundwork for sustainable off-world industry.

Other startups from around the world joined the Houston incubator in the same time period, including:

More than 100 startups joined Greentown this year, according to an end-of-year reflection shared by Greentown CEO Georgina Campbell Flatter.

Flatter joined Greentown in the top leadership role in February 2025. She succeeded former CEO and president Kevin Knobloch, who stepped down in July 2024.

"I moved back to the United States in March 2025 after six years overseas—2,000 miles, three children, and one very patient husband later. Over these months, I’ve had the chance to hear from the entrepreneurs, industry leaders, investors, and partners who make this community thrive. What I’ve experienced has left me brimming with urgent optimism for the future we’re building together," she said in the release.

According to Flatter, Greentown alumni raised more than $2 billion this year and created more than 3,000 jobs.

"Greentown startups and ecosystem leaders—from Boston, Houston, and beyond—are showing that we can move further and faster together. That we don’t have to choose between more energy or lower emissions, or between increasing sustainability and boosting profit. I call this the power of 'and,'" Flatter added. "We’re working for energy and climate, innovation and scale, legacy industry and startups, prosperity for people and planet. The 'and' is where possibility expands."

From Your Site Articles
Ad Placement 300x100
Ad Placement 300x600

CultureMap Emails are Awesome

Property Showcase

Meta and OpenAI agree to follow Texas’ new standards for data centers

data demands

Meta Platforms, the parent company of Facebook and Instagram; OpenAI, the owner of ChatGPT; and other tech companies have agreed to follow Texas’ new standards for the development of data centers.

As Texas politicians respond to communities’ increased pushback against power- and water-dependent data centers, Gov. Greg Abbott recently established guidelines for data center projects. President Trump and Gina Jinojosa, a Democrat who will oppose Abbott in the November election, have leveled criticism about the new rules.

Abbott recently directed the Public Utility Commission of Texas and Electric Reliability Council of Texas (ERCOT) to ensure data centers:

  • Pay for their electrical infrastructure instead of shifting costs to families and small businesses
  • Reuse their own water
  • Reduce the cost of electricity for Texans
  • Prevent disruption to residential neighborhoods
  • Eliminate reliance on taxpayer-funded financial incentives

Abbott and Trump differ over data center ‘guardrails’

After releasing the guidelines, Abbott put a moratorium on new data centers in the state.

Abbott directed the Public Utility Commission and ERCOT to audit all data center projects going through ERCOT’s approval process for connecting to the state’s power grid. The two agencies must complete their review before a data center project can join the grid. Any project that fails to comply with the agencies’ requirements won’t be permitted access to the grid.

“I established clear guardrails to ensure data centers protect our electric grid, conserve our water, respect our neighborhoods, and pay their own way,” Abbott, who’s running for a fourth consecutive term as governor, said in a news release. “They must not pass costs on to Texas families or interfere with their quality of life.”

Abbott has hailed Texas as “the epicenter of AI development.”

In a recent interview with Punchbowl News, President Trump questioned the data center rules imposed by Abbott, a fellow Republican.

“I saw Texas the other day sort of is against data centers,” Trump said. “I think it’s a mistake. And I’m not taking positions, I just think it’s a mistake, because there are other communities that want it. When a community wants it, it means a lot of money is going to come into that community.”

In a statement, Gina Hinojosa, the Democratic nominee for Texas governor, stresses that the governor’s data center standards don’t wield the same power that laws would.

“We need a moratorium on data centers until the legislature can meet to put in place real protections so Texans can have a seat at the table to decide if and how data centers come into their communities,” Hinojosa said. “When the companies being regulated are cheering for the rules, you know the rules were written for them, not for Texans.”

The Texas Tribune has identified at least 248 planned data centers in the state, with perhaps hundreds more that aren’t as far along in the development process. At least 355 data centers already operate in Texas. The majority of the new data centers will help power AI software and services.

Meta promises it will be ‘paying our own way‘

In a blog post, Meta commends Abbott’s data center initiative. Meta and investment manager BlackRock are investing more than $10 billion to build a data center campus in El Paso. The 12-building campus, expected to go online in 2028, will be capable of delivering 1 gigawatt of computing power to support Meta’s AI technology.

BlackRock will own 80 percent of the project, and Meta will own the remaining 20 percent.

Meta’s two other Texas data centers are in Fort Worth and Temple.

“Whether it’s creating jobs, growing opportunities for local businesses, or improving energy and water infrastructure, we’re committed to strengthening communities and paying our own way,” Meta says of Abbott’s directive.

OpenAI commits to helping Texas maintain AI leadership

In an Aug. 7 letter to Abbott, OpenAI says it, too, will follow Texas’ data center standards. In fact, the company says the standards reflect practices it already applies to data center projects.

“Texas has built a strong environment for innovation, energy, and economic growth,” the company says. “OpenAI wants to help Texas remain a national leader in AI while demonstrating that this growth can be responsible, reliable, and beneficial to Texans.”

OpenAI is building a $470 million data center in Milam County, and last year it launched operations at a data center campus in Abilene as part of its $500 billion Stargate initiative with Oracle and SoftBank.

Abbott’s office also announced Aug. 11 that EdgeConneX and Stream Data Centers have also pledged to comply with the regulations. Read more here.

ExxonMobil expands Gulf Coast CCS business with Louisiana deal

carbon contract

Spring-based energy powerhouse ExxonMobil has picked up another project in the carbon capture and storage (CCS) market.

Natural gas pipeline operator Williams Cos. has tapped ExxonMobil to transport and store up to one metric ton per year of CO2 from Williams’ natural gas collection and processing plant in southwest Louisiana’s Haynesville Shale.

Williams will transport natural gas via its Louisiana Energy Gateway pipeline, then process the natural gas and deliver it to the Gulf Coast for export as liquefied natural gas (LNG). The LNG will be used in power generation, residential and commercial heating, and industrial processes.

Williams recently agreed to acquire Momentum Midstream for up to $5.5 billion to expand Williams’ LNG presence in the Haynesville Shale. Haynesville is the country’s third-largest producer of natural gas.

Once the deal closes, Williams will own a $1.5 billion project in southwest Louisiana that will expand capacity of the Transco natural gas distribution system. The system serves power and LNG-export customers. Williams will also gain over 4,000 miles of pipeline and more than one million acres.

While Williams is based in Tulsa, Oklahoma, it has a significant presence in Houston. Last month, Green Street’s Real Estate Alert reported Williams bought the 64-story, 1.4 million-square-foot Williams Tower south of The Galleria from Invesco Real Estate for more than $300 million. The company will occupy about 360,000 square feet in the skyscraper for its Houston hub.

Williams employs about 800 people in Bayou City, including roughly 700 who work at Williams Tower, and plans to hire another 100 by the end of this year.

The Williams deal is ExxonMobil’s seventh CCS contract. ExxonMobil’s CCS portfolio supports LNG, lower-carbon-intensity steel, ammonia, natural gas processing, industrial gases and methanol.

ExxonMobil has established a “carbon superhighway” along the Gulf Coast to fuel its CCS business. The company owns and operates a more than 1,300-mile CO2 pipeline system, the largest in the U.S.

“Carbon capture is becoming an increasingly important part of industrial operations, but capture alone doesn’t solve the problem of high emissions,” says ExxonMobil. “What matters next is how CO2 is transported, used, and stored.”

ExxonMobil’s CCS initiatives are aimed at capturing a chunk of the rapidly growing CCS market in the U.S. Straits Research forecasts the market will grow from $5.66 billion this year to $13.56 billion by 2034.

“It’s not every day you get to witness the birth of a new American industry, but that’s exactly what’s happening right now at the U.S. Gulf Coast,” Dominic Genetti, senior vice president of CCS at ExxonMobil, wrote in an article published last year on the company’s website.

Fervo Energy, Mercury Fund leaders named first experts in residence for TEX-E

energy mentors

Two leading companies in Houston's clean energy scene have been named the Texas Exchange for Energy & Climate Entrepreneurship's first experts in residence.

TEX-E announced this month that Houston-based geothermal unicorn Fervo Energy and venture capital firm Mercury Fund have joined the nonprofit's new Expert-in-Residence partnership. The program aims to connect TEX-E Fellows with "the people and organizations shaping the future of energy and entrepreneurship."

The 2026 TEX-E Fellows were named in June and include 67 students from six Texas universities and the Massachusetts Institute of Technology. Nineteen are from Houston universities. See the full list here.

Through the Expert-in-Residence program, fellows will be able to network and work with:

"More than anything, students need the determination and creativity to step outside of their comfort zones and tackle problems that lack clear answers. At Fervo, we've consistently bet on young people who lack traditional 'hard skills' but are willing to embrace uncertainty and learn on the job. That open-mindedness will take students far," Jewett said in a prepared statement. Fervo named Jewett as COO in June.

TEX-E was founded in 2022 through partnerships with MIT Martin Trust Center for Entrepreneurship and Greentown Labs. It works with university students from six schools: Rice University, University of Houston, Prairie View A&M University, The University of Texas at Austin, Texas A&M University and MIT.

The organization named Houston venture capital and innovation leader Sandy Guitar as its new executive director last year. Guitar previously served as general partner and managing director at Houston-based VC firm HX Venture Fund and is co-founder of Weathergage Capital.

TEX-E is known for its student track within the Energy Venture Day and Pitch Competition at CERAWeek. It awarded $50,000 to student teams from the University of Texas and Rice University. Read more here.

View All Listings