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 CleanTech Breakthrough Awards honor “the visionaries and leaders accelerating the transition to a cleaner, more sustainable future.” Photo via quaise.com

Eight cleantech companies with Houston headquarters were recognized in this year’s CleanTech Breakthrough Awards program.

CleanTech Breakthrough, part of market intelligence platform Tech Breakthrough, honors innovative and influential energy, climate, and cleantech companies, products and services.

This year’s winners from Houston are:

  • CleanTech Analytics Company of the Year: Amperon, a provider of AI-powered energy forecasting software
  • Overall Hydrogen Solution of the Year: Eclipse Energy, which converts maxed-out oilfields into low-cost sources of hydrogen
  • Energy Production Company of the Year: Fervo Energy, a provider of geothermal power
  • Production Solution of the Year: Quaise Energy, a developer of a drilling system for converting traditional power stations into geothermal energy plants
  • Green Materials Solution of the Year: Solidec, which uses air, water, and electricity to produce chemicals
  • Hydrogen Production Solution of the Year: VEMA Hydrogen, a producer of renewable hydrogen
  • CleanTech Analytics Innovation Award: Finland-based Wärtsilä, a provider of advanced energy storage systems and services, which maintains its U.S. headquarters in Houston
  • Energy Production Platform of the Year: France-based energy giant TotalEnergies, which maintains its U.S. headquarters in Houston

Other Texas companies made the list, including Austin-headquartered Base Power, founded by Justin Lopas and Zach Dell. Zach Dell is the son of Austin billionaire and Houston native Michael Dell, chairman and CEO of Dell Technologies. The company recently started servicing Houston and established an office in Katy.

CleanTech Breakthrough says its annual awards program honors “the visionaries and leaders accelerating the transition to a cleaner, more sustainable future.”

“In a world increasingly focused on sustainability and environmental responsibility, innovation in clean technology has never been more critical,” said Bryan Vaughn, managing director of CleanTech Breakthrough. “This year’s winners represent the very best in ingenuity and execution, delivering solutions that not only reduce environmental impact but also drive efficiency, scalability and real-world results.”

See the full list of the 2026 winners here.

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