top honor

8 Houston energy companies land on Time's top greentech list for 2025

Fervo Energy claimed a top 10 spot on Time magazine and Statista’s new list of America’s Top GreenTech Companies of 2025. Photo via Getty Images.

The accolades keep rolling in for Houston-based Fervo Energy, a producer of geothermal power.

Fervo lands at No. 6 on Time magazine and Statista’s new list of America’s Top GreenTech Companies of 2025. The ranking recognizes sustainability-focused companies based on factors such as impact, financial strength, and innovation.

Time notes that Fervo broke ground in 2023 in Utah on what the company claims will be the world’s largest geothermal plant. The plant is scheduled to start supplying carbon-free electricity to the grid next year and to reach its 400-megawatt capacity in three years.

“Technologies like this only make a difference if we deploy them at large-scale in a way that can reduce carbon emissions and increase the reliability of the grid,” Fervo CEO Tim Latimer told Time in 2023.

The startup was named North American Company of the Year by research and consulting firm Cleantech Group for 2025. Fervo topped the Global Cleantech 100, Cleantech Group’s annual list of the world’s most innovative and promising cleantech companies.

Last year, Fervo also made Time’s list of the 200 Best Inventions of 2024. Fervo was recognized in the green energy category for its FervoFlex geothermal power system.

Founded in 2017, Fervo is now a unicorn, meaning its valuation as a private company exceeds $1 billion. The startup’s valuation is estimated at $1.4 billion. According to PitchBook data, the company raised $634 million in the fourth quarter of 2024.

In all, eight Houston-area companies appear among the top 250 greentech companies ranked by Time and Statista. Other than Fervo, they are:

  • No. 43 Lancium Technologies, an energy storage and distribution company
  • No. 50 Solugen, a producer of sustainable chemicals.
  • No. 56 Quaise Energy, which specializes in terawatt-scale geothermal power.
  • No. 129 Plus Power, a developer, owner and operator of battery storage projects.
  • No. 218 Dream Harvest, which promotes sustainable vertical farming.
  • No. 225 Cemvita, which uses synthetic biology to convert carbon emissions into bio-based chemicals.
  • No. 226 Syzygy Plasmonics, which decarbonizes chemical production.
Vermont-based BETA Technologies claimed the No. 1 spot. The company manufactures electric aircraft.

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A View From HETI

The company plans to grow its Houston workforce to 100 employees by the end of 2028. Photo courtesy BlueSpark Energy

Pulsed-power technology company BlueSpark Energy will open its new global headquarters in Houston’s Energy Corridor to house its engineering, research and development, manufacturing, commercial and digital teams.

“Houston isn’t simply our new headquarters; it’s where a new BlueSpark begins,” Kahina Abdeli-Galinier, president and CEO of BlueSpark, said in a news release. ”We’re building the well health technology the industry needs to get more from existing wells, reduce intervention costs and keep wells producing for longer. Our new home brings us closer to our customers and places us at the heart of one of the most exciting markets in the industry, with the talent pool to match.”

The company, which began in Calgary, plans to grow its Houston workforce to 100 employees by the end of 2028, while the manufacturing element is expected to be operational in February 2027.

According to BlueSpark, the new facility will feature double the manufacturing floorspace of its current site, and the extra space will allow it to scale its tool manufacturing.

The headquarters is on West Sam Houston Parkway. BlueSpark's Chief Technology Officer Matt Mohajer and Chief Commercial Officer Zach Wilbur are already leading teams at the new space, according to the release.

BlueSpark develops pulsed-power technology that uses electrical energy to clean oil and gas well components, remove scale buildup and restore production without damaging equipment. Its technology helps operators reduce downtime, improve well performance and extend the productive life of existing wells.

Late last year, the company named Kahina Abdeli-Galinier as its CEO. It has since rebranded and focused on expanding its technology into new applications, including plugging and abandonment, cement removal and water services.

“We’re investing heavily in our technology, both the physics and the intelligence and delivery layer around it,” Abdeli-Galinier added in the release. “Having our engineering, manufacturing, digital, R&D and commercial teams in one place allows us to move much faster, giving our customers the tools they need to keep wells healthy and producing more for longer.”

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