saying hello to HAL

Finnish AI solutions co. joins Houston-based clean energy accelerator

The latest energy tech startup to join Halliburton Labs is developing AI and deep learning technology. Photo courtesy of Halliburton

Finnish clean-tech company Rocsole is the latest company to join Houston-based Halliburton Labs, according to a statement the energy giant made this month.

Rocsole, which has its U.S. office in Houston, is known for its proprietary smart process imaging solutions and AI/deep learning rendered predictions that create "safer, cleaner, and more efficient operations," according to its website. The company services offshore wells and onshore tanks, pipelines and separators to reduce costs, avoid shutdowns and monitor product quality.

"With the help of Halliburton's global reach, we plan to accelerate our commercialization in major international markets," Pekka Kaunisto, CEO of Rocsole, said in a statement.

Kaunisto was named CEO of the company in April, succeeding Mika Tienhaara, who served as CEO since early 2020.

Rocsole joins several other clean energy companies to go through the Halliburton Labs accelerator, which launched in 2020 to help early-stage companies achieve commercialization milestones. The accelerator is a wholly owned subsidiary of Halliburton and provides participants with access to technical expertise, mentorships and programming.

Fellow Finnish company A-W Energy, whose technology converts ocean waves into energy, was part of a 2022 cohort.

Houston-based FuelX, England-based LiNa Energy, and Canadian company Solaires Entreprises were the most recent companies to be added to the accelerator in April 2023. Other companies to be added this year include Matrix Sensors, Renew Power Systems and SunGreenH2. The program is going on the road to host its next Halliburton Labs Finalists Pitch Day on Thursday, September 21, in Denver as a part of Denver Startup Week.

Halliburton Labs is closing applications for its next cohort on August 18. Applications are open online.

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A View From HETI

Fervo Energy climbed 10 spots on Time's list of the World's Top GreenTech Companies of 2026. Photo via Fervo Energy

Six Houston-area businesses appear on Time magazine’s 2026 list of the world’s top greentech companies, with a high-flying name leading the pack.

The highest-ranked local company is Houston-based geothermal power producer Fervo Energy, which claims the No. 4 spot—up from No. 14 last year.

In May, Fervo raised nearly $1.9 billion in its IPO, making it the biggest-ever IPO in the clean energy sector. The company’s valuation now exceeds $10 billion.

Founded in 2017, Fervo borrows methods from the oil and gas sector to drill wells that go down vertically into hot rock before turning horizontal, letting water circulate through them and produce electricity from the heat it absorbs. Cape Station in Utah, the company's first utility-scale project, is set to start delivering power to the grid later this year, with capacity expected to grow to 100 megawatts by 2027.

Co-founder and CEO Tim Latimer tells Fast Company, which named him a 2026 Visionary of the Year, that he launched his career as a drilling engineer for fossil fuels, “but quickly became obsessed with this idea that the drilling techniques we were using would actually be transformative for the world of geothermal as well.”

Fast Company notes the geothermal power generated by Cape Station will be available 24/7, unlike wind and solar power.

“When you start adding something to the grid mix that’s affordable and works around the clock,” Latimer says, “that’s going to be a huge asset to meeting our country’s energy needs.”

Time teamed up with data provider Statista to compile the second annual ranking of the 250 top greentech companies in the world. Companies on the list either develop or provide green technology, products, or services that help ease or reverse the environmental impacts of human activity.

Statista gathered and analyzed data from more than 8,300 companies to create the list, and they were scored in three categories: positive environmental impact, innovation, and financial strength. Fervo earned a score of 94.63 out of 100.

Joining Fervo on this year’s list are:

  • Houston-based Quaise Energy (No. 78), which specializes in terawatt-scale geothermal power
  • The Woodlands-based Plus Power (No. 112), which develops, owns and operates battery storage projects
  • Houston-based Utility Global (No. 167), which develops decarbonization technology
  • Houston-based 1PointFive (No. 217), an Occidental Petroleum subsidiary that offers large-scale carbon removal and storage.
  • Houston-based Sage Geosystems (No. 250), which produces commercial-scale geothermal power

Earlier this year, six Houston-area companies landed on Time's list of top greentech companies in America: Fervo (No. 1), Quaise Energy (No. 49), Plus Power (No. 71), Utility Global (No. 98), Solugen (No. 199) and Noodoe (No. 215).

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