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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."

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Zero-emission electric air taxi network to land in Texas in 2027

Electric Travel

San Jose, California-based aerospace company Archer Aviation is bringing its air-taxi system to the “Texas triangle” of Houston, Austin and Dallas-Fort Worth.

Currently, the planned zero-emission electric air taxi networks will use Archer’s Midnight air taxi to “turn 60- to 90-minute drives to major airports, business districts and major destinations into 10- to 20-minute flights,” the company said in a news release. Archer plans to begin flights in the Texas triangle next year.

The Midnight air taxi is an all-electric vertical takeoff and landing (eVTOL) aircraft. It can carry four passengers and a pilot and is designed for consecutive flights of about 20 miles.

Archer cites the Texas triangle as one of the busiest and fastest-growing “megaregions” in the country due to its proximity to coastal regions, major airports, and a number of business districts.

Archer Chief Commercial Officer Nikhil Goel described the air taxi experience to CW Houston as “100 times quieter than a helicopter for the price of an Uber Black.” He added that the air taxis are a combination of a helicopter, a small airplane and a drone.

In Houston, Archer’s air taxi network will aim to connect George Bush Intercontinental, William P. Hobby and Sugar Land Regional Airport with downtown destinations, including the Thompson Hotel helipad, and Galveston.

In Austin, it plans to link the city's Austin-Bergstrom International Airport and Austin Executive Airport with the F1 Circuit Helipad at the Circuit of the Americas. Archer debuted its Midnight aircraft at the F1 Prix in the Fan Zone and the F1 Paddock at Austin’s COTA.

The Dallas-Fort Worth network is slated to include Dallas-Fort Worth International Airport, Dallas Love Field, Addison Airport, Arlington Municipal Airport, Fort Worth Meacham International Airport and Perot Field Fort Worth Alliance Airport, plus major business hubs like Frisco Station.

“Texas is setting the bar for America’s leadership in the next generation of aviation,” Adam Goldstein, founder and CEO of Archer Aviation, said in the release. “Our planned networks will make the benefits of electric air taxis real for Texans — trading hours in traffic for minutes in the air, while connecting the biggest airports, business districts and sporting hubs in ways that America’s largest megaregion needs to grow.”

Archer is working with state and local partners to develop charging infrastructure and plans to pursue Texas operations through the White House’s eVTOL Integration Pilot Program, according to the release. It recently completed its "No Roads" flight tour, which included multiple flights over the San Francisco Bay, and flew to seven cities over three days.

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This article first appeared on InnovationMap.com.

Fervo Energy scores third consecutive nod on MIT climatech list

top honor

Houston-based geothermal power company Fervo Energy has notched a three-peat on MIT Technology Review’s annual 10 Climate Tech Companies to Watch List.

“The newly public company is betting that Al’s power boom will help turn enhanced geothermal energy into a scalable reality,” MIT Technology Review says of the three-time honoree.

Fervo went public in May through a $2.2 billion IPO.

Other Fervo recent milestones include:

“We are in the midst of a once-in-a-generation surge in power demand that is likely to dictate the outcome of the American success story in both artificial intelligence and industrial growth, but also the extent to which people have access to affordable, reliable power,” Tim Latimer, co-founder, chairman, president and CEO, said during Fervo’s second-quarter earnings call.

“The stakes have never been higher,” he added, “and I’ve never been more convinced that Fervo is uniquely positioned to meet this moment.”

Also making MIT Technology Review’s fourth annual list were:

  • Greentown Houston alum Energy Dome, based in Milan, Italy. “Energy Dome is using the gas to deliver cheap long-duration energy storage for the grid,” MIT Technology Review says.
  • Greentown Houston alum Moment Energy, based in Vancouver, Canada. “The startup is betting that repurposing — rather than recycling — used EV batteries will help buoy much-needed U.S. supply,” MIT Technology Review says.
  • Greentown Boston member Form Energy, based in Somersville, Massachusetts. It’s a three-time honoree. “Form’s 100-hour batteries could make clean energy more weather-resilient and help power data centers,” MIT Technology Review says.

Greentown Labs is an incubator for climatech and energy startups that's co-located in Houston and Boston. Fervo is also an alum of Greentown Houston.

“Whether early-stage startup or multinational corporation, the businesses we’ve chosen are working on technologies to help us address climate change or adapt to our warming world,” MIT Technology Review says. “There’s an urgent need for these innovators: We must begin to drastically reduce emissions to avoid the deadliest impacts of climate change, while also contending with its harmful effects.”

ExxonMobil and Chevron top Q3 estimates on higher prices and strong output

Q3 Report

ExxonMobil and Chevron both reported better than expected quarterly results Friday as the oil majors benefited from higher prices and record production.

Besides the disruption caused by the wars in Iran and Ukraine that have driven up the cost of fuel, Exxon is also seeing strong production in its fields in Guyana and the Permian Basin in the Southwest. Chevron said its results include one month of production in Venezuela where it’s making a big investment.

Utilization at Exxon's U.S. Gulf Coast refineries was at 100%, and U.S. Gulf Coast diesel production was at the second-highest on record.

The price of diesel, currently about $6.32 per gallon, is up 71% since last year, according to AAA. Diesel surpassed $6 last month — a record. Regular gasoline is up about 38% in the past year as well. To that end, some state officials have been offering gas tax holidays and other measures to ease costs.

Pain at the pump

The cost of crude oil — the main ingredient in gasoline as well as diesel — has been volatile amid ongoing uncertainty about the war's future. The conflict with Iran has impeded most shipping through the Strait of Hormuz, a narrow waterway that previously served as a delivery route for a fifth of the world’s oil and natural gas.

Both Brent crude and benchmark U.S. crude were at over $100 a barrel on Friday. Brent is still near the high end of its range since the war with Iran began. The highest price for the most actively traded contract in the market for Brent crude since then is nearly $120, reached in March.

At the beginning of the month, the Group of Seven wealthy democracies announced that they planned to release 100 million barrels of oil and fuel products in the coming weeks, starting with “substantial” amounts of diesel.

The release follows on from a March announcement that International Energy Agency member countries would release 426 million barrels of oil and products to stabilize the oil market. European Union countries committed about 92 million barrels, a promise weighted toward refined products made from crude such as diesel.

President Donald Trump has been trying to tamp down soaring energy costs ahead of the U.S. midterm elections. As part of those efforts, he announced earlier this month that the U.S. struck a deal to obtain diesel from Russia. Congress has criticized the deal as fueling Russia’s war against Ukraine, violating existing U.S. laws and drawing the U.S. closer to Russia. Even as Congress has tried to push back, the first tanker carrying Russian diesel to the United States set sail a week ago.

Results beat Wall Street expectations

Darren Woods, ExxonMobil chairman and CEO, noted that investments such as the expansion of its Beaumont refinery in Texas have contributed to an increase in its distillate production by approximately 40% since 2019.

For the third quarter, net income more than doubled to $3.72 per share. On an adjusted basis, profit totaled $4.23 per share, easily topping the average analyst estimate of $4.12 per share.

Revenue during the three months ended in September rose 33% to $113.16 billion, also beating estimates.

The Spring, Texas-based company also raised its quarterly dividend to $1.07 and set a $20 billion stock buyback plan.

Houston-based Chevron said it earned $9.9 billion, or $5.06 per share, during the third quarter, as revenue surged 36% to $67.8 billion. Its results handily topped estimates.

Crude utilization at Chevron's U.S. refineries totaled 98%. Those refineries processed more than 1 million barrels of crude oil per day. The company said it set production records at its Eastern Mediterranean and Australian assets.

Chevron, the second-largest U.S. oil company, has had a presence in Venezuela since 1923. Last month it announced it will invest $7 billion over the next five years in Venezuela. It said Friday that following an accounting-related change during the quarter, it’s now including those results.

Overall capital expenditures during the quarter were lower compared with a year ago because it spent less in the Permian Basin.

Mike Wirth, Chevron’s chairman and CEO, said that the company signed agreements to reduce Bakken midstream costs by about 50%, strengthening the asset’s competitiveness. Chevron increased its holdings in the Bakken fields in North Dakota and Montana following its $53 billion acquisition of Hess Corp. last year.

Shares of Exxon rose 1.3% in morning trading. The stock is up 64% in the past 12 months. Chevron's stock climbed 1.8%.

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