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Houston geothermal company raises $97M Series B

fresh funding

Sage Geosystems has raised a $97 million Series B. Photo via sagegeosystems.com.

Houston-based geothermal energy startup Sage Geosystems has closed its Series B fundraising round and plans to use the money to launch its first commercial next-generation geothermal power generation facility.

Ormat Technologies and Carbon Direct Capital co-led the $97 million round, according to a press release from Sage. Existing investors Exa, Nabors, alfa8, Arch Meredith, Abilene Partners, Cubit Capital and Ignis H2 Energy also participated, as well as new investors SiteGround Capital and The UC Berkeley Foundation’s Climate Solutions Fund.

The new geothermal power generation facility will be located at one of Ormat Technologies' existing power plants. The Nevada-based company has geothermal power projects in the U.S. and numerous other countries around the world. The facility will use Sage’s proprietary pressure geothermal technology, which extracts geothermal heat energy from hot dry rock, an abundant geothermal resource.

“Pressure geothermal is designed to be commercial, scalable and deployable almost anywhere,” Cindy Taff, CEO of Sage Geosystems, said in the news release. “This Series B allows us to prove that at commercial scale, reflecting strong conviction from partners who understand both the urgency of energy demand and the criticality of firm power.”

Sage reports that partnering with the Ormat facility will allow it to market and scale up its pressure geothermal technology at a faster rate.

“This investment builds on the strong foundation we’ve established through our commercial agreement and reinforces Ormat’s commitment to accelerating geothermal development,” Doron Blachar, CEO of Ormat Technologies, added in the release. “Sage’s technical expertise and innovative approach are well aligned with Ormat’s strategy to move faster from concept to commercialization. We’re pleased to take this natural next step in a partnership we believe strongly in.”

In 2024, Sage agreed to deliver up to 150 megawatts of new geothermal baseload power to Meta, the parent company of Facebook. At the time, the companies reported that the project's first phase would aim to be operating in 2027.

The company also raised a $17 million Series A, led by Chesapeake Energy Corp., in 2024.

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Here are the top Houston energy transition stories of the year. Photo via Getty Images

Top 10 headlines that fueled Houston energy transition news in 2025

Year in Review

Editor's note: As we ring in a new year, we're looking back at the hottest energy transition topics of 2025. Here are the 10 most-read EnergyCapitalHTX stories of 2025, from a Texas energy startup's $200M funding round to a Houston energy storage company's major ERCOT deal:

Texas energy startup closes $200M round to fund first factory in the state

Base Power, founded by Justin Lopas and Zach Dell, closed a $200 million series B and plans to expand in Texas and around the country. Photo courtesy Base Power.

Base Power, an Austin-based startup that provides battery-powered home energy services and just entered the Houston market, raised $200 million in series B funding. The money was raised for construction of Base Power’s first factory in Texas and the national expansion of Base Power’s services. Last year, the startup landed $68 million in a series A funding round.

Houston startup secures $22 million for ERCOT energy storage projects

Houston's GoodPeak is breaking ground on its first energy storage projects. Photo via Getty Images.

Houston-based GoodPeak nailed down $22 million in construction debt financing to help build its first two 10-megawatt battery energy storage project. GoodPeak secured the debt financing from financial services company Pathward and renewable energy lender BridgePeak Energy Capital.

CenterPoint partners with AI and infrastructure companies to boost reliability

CenterPoint has partnered with Atlanta-based Osmose and Australia-based Neara to use AI-powered predictive modeling to inform decisions on restorations and risk. Photo via Getty Images

Houston utilities giant CenterPoint is partnering with companies from Atlanta and Australia to use AI to increase data accuracy and strengthen the power grid. The partnership is part of a collaboration between AI-powered predictive modeling platform company Neara and utility infrastructure asset assessment solutions company Osmose.

ExxonMobil, Rice launch sustainability initiative with first project underway

Under a new agreement, ExxonMobil and Rice University aim to develop “systematic and comprehensive solutions” to support the global energy transition. Photo via Getty Images.

Houston-based ExxonMobil and Rice University announced a master research agreement to collaborate on research initiatives on sustainable energy efforts and solutions. The agreement included multiple projects that were expected to be underway in 2025.

Houston expert: From EVs to F-35s — materials that power our future are in short supply

No critical minerals, no modern economy. Getty images

If you’re reading this on a phone, driving an EV, flying in a plane, or relying on the power grid to keep your lights on, you’re benefiting from critical minerals. These are the building blocks of modern life. Things like copper, lithium, nickel, rare earth elements, and titanium, they’re found in everything from smartphones to solar panels to F-35 fighter jets. Continue reading this guest column from Houston energy expert Scott Nyquist.

Greentown Labs announces newest startups to join Houston climatetech incubator

Five companies have joined Greentown Labs Houston, specializing in various "green" applications, from converting plastic waste into sustainable materials to developing energy-storage solutions. Photo courtesy Greentown Labs.

Greentown Labs added five startups to its Houston community in Q1 of 2025. The companies are among a group of 19 that joined the climatetech incubator, which is co-located in Houston and Boston, in the same time period. The companies that joined the Houston-based lab specialize in a number of "green" applications, from converting plastic waste into sustainable materials to developing energy-storage solutions.

Houston cleantech company expands into China with hydrogen energy pilot

HNO International is partnering with Zhuhai Topower New Energy Co. to deploy its modular SHEP technology in China. Graphic courtesy of HNO

Hydrogen-based clean energy technology company HNO International announced its first foray into the Chinese market this spring. The company, which is building a state-of-the-art hydrogen production and refueling facility in Katy, entered into an agreement with renewable energy company Zhuhai Topower New Energy Co. This initiative includes a pilot deployment of HNOI’s Scalable Hydrogen Energy Platform, or SHEP, in China.

CenterPoint reports progress on grid improvements ahead of 2025 hurricane season

CenterPoint Energy aims to complete its suite of grid resiliency projects before the 2025 hurricane season. Photo via centerpointenergy.com

As part of an ongoing process to make Houston better prepared for climate disasters, CenterPoint Energy announced its mid-year progress update on the second phase of the Greater Houston Resiliency Initiative (GHRI). CenterPoint reported that it had completed 70 percent of its resiliency work, and that all GHRI-related actions were expected to be complete before the official start of the 2025 hurricane season.

Daikin completes solar plant to power massive Houston-area campus

Daikin Industries' new solar power plant at its Waller-area campus will power its central chiller plant and is designed to connect to the campus' electric grid. Photo courtesy Daikin.

Japanese HVAC company Daikin Industries completed a nearly one-megawatt solar power plant at its Daikin Comfort Technologies North America campus southeast of Waller. Daikin said the new plant at its 4.2 million-square-foot Daikin Texas Technology Park will eliminate an estimated 845 metric tons of carbon emissions each year. The park houses the largest HVAC factory in North America.

Houston earns No. 3 spot among cities with most Fortune 500 headquarters

Twenty-six Houston-area companies landed on the latest Fortune 500 list. Photo via Getty Images

Houston maintained its No. 3 status this year among U.S. metro areas with the most Fortune 500 headquarters. Fortune magazine tallied 26 Fortune 500 headquarters in the Houston area, behind only the New York City area (62) and the Chicago area (30).

Freedom CNG, a distributor of compressed renewable natural gas, has closed three acquisitions in recent months. Photo courtesy Freedom CNG.

Houston renewable fuel co. expands and more energy transition news to know

Trending Topics

Editor's note: The biggest energy transition news in recent weeks includes a major acquisition, big funding, a new biomaterial from Houston researchers, and more. Below are the five most-read stories from EnergyCaptialHTX from July 15-31, 2025:

1. Houston renewable fuel company expands reach with latest acquisition

Freedom CNG is growing. Photo courtesy Freedom CNG

Houston-based Freedom CNG, a provider and distributor of compressed renewable natural gas, has acquired ComTech Energy, a Canada-based provider of on-site mobile refueling for compressed renewable natural gas. The purchase price wasn’t disclosed. The acquisition allows Freedom CNG to adopt a hub-and-spoke operational model, allowing customers to move away from fixed fueling infrastructure with low-carbon energy solutions across North America. Continue reading.

2. Houston researchers develop strong biomaterial that could replace plastic

A team led by M.A.S.R. Saadi and Muhammad Maksud Rahman has developed a biomaterial that they hope could be used for the “next disposable water bottle." Photo courtesy Rice University.

Collaborators from two Houston universities are leading the way in engineering a biomaterial into a scalable, multifunctional material that could potentially replace plastic. The team introduced a biosynthesis technique that aligns bacterial cellulose fibers in real-time, which resulted in robust biopolymer sheets with “exceptional mechanical properties.” Continue reading.

3. Houston energy tech platform Molecule closes series B funding

Molecule has closed its latest investment round. Photo via Getty Images

Houston-based energy trading risk management (ETRM) software company Molecule has completed a successful series B round for an undisclosed amount. The raise was led by Sundance Growth, a California-based software growth equity firm, and Molecule founder Sameer Soleja said the funding will allow the company to "double down on product innovation, grow our team, and reach even more markets." Continue reading.

4. 7 Houston energy-focused businesses among Time's best midsize companies 2025

null7 Houston energy-focused businesses among Time's best midsize companies 2025

CenterPoint is one of 13 Houston companies on Time's list. Photo via centerpoint.com

Seven Houston-based businesses focused on the energy industry appear on Time magazine and Statista’s new ranking of the country’s best midsize companies. Time and Statista ranked companies based on employee satisfaction, revenue growth, and transparency about sustainability. All 500 companies on the list have annual revenue from $100 million to $10 billion. Continue reading.

5. TEX-E names Houston VC leader as new executive director

TEX-E, a Houston-based energy transition nonprofit, has named Sandy Guitar as its executive director. Photo courtesy TEX-E.

The Texas Exchange for Energy & Climate Entrepreneurship (TEX-E) has named Houston venture capital and innovation leader Sandy Guitar as its new executive director. Guitar previously served as general partner and managing director at Houston-based VC firm HX Venture Fund and is co-founder of Weathergage Capital. She also sits on the advisory board of Rice University's Liu Idea Lab for Innovation and Entrepreneurship (Lilie) and launched the Women Investing in VC in Houston group. Continue reading.

The Investment is expected to help expand Bot Auto's tech development in autonomous trucking that will focus on safety and operation efficiency. Photo courtesy of Bot Auto

Houston-based autonomous trucking tech co. raises $20M

fresh funding

A Houston-based autonomous vehicle technology company has raised early funding.

Bot Auto has announced the completion of its pre-series A funding round which was oversubscribed and raised $20 million. The round was led by investments from Brightway Future Capital, Cherubic Ventures, EnvisionX Capital, First Star Ventures, Linear Capital, M31 Capital, Taihill Venture, Uphonest Capital, and Welight Capital.

“As true believers in autonomous trucking, we're thankful for our investors' shared vision,” Xiaodi Hou, founder and CEO of Bot Auto, says in a news release. “Our strong commitment, combined with recent AI advancements and a sharpened focus on operational efficiency, has created a clear path to commercialization.”

The funds raised will be focused on developing the technology and will opt to avoid unnecessary hiring ahead of operational maturity, scaling the operational footprint prior to product readiness, over expansion and partnership debt. The company aims for a more sustainable and efficient future, and is hoping its engineers and AV executives help Bot Auto become an autonomous trucking game changer.

The Investment is expected to help expand Bot Auto's tech development in autonomous trucking that will focus on safety and operation efficiency.

“Our prospects for success have never been more promising,” Hou adds. “ We march forward, committed to bringing this transformative technology to humanity for a brighter future.”

Bot Auto’s vision aligns with the pioneering spirit of Houston’s legacy in space exploration, striving to achieve remarkable feats in technology and transportation. The company is dedicated to leveraging this investment to make significant strides in the US autonomous trucking industry, ultimately contributing to a more sustainable and efficient future.

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This article originally ran on InnovationMap.

Branch Energy aims to provide customers with clean energy at a lower cost than competitors. Photo via Getty Images

Houston clean energy provider raises $10.8M series A

money moves

A tech-driven retail energy provider based in Houston has secured an oversubscribed series A round of funding.

Branch Energy raised a $10.8 million round led by climate-focused venture capital firm Prelude Ventures with co-investor Zero Infinity Partners, an infrastructure tech-focused firm. The fresh funding will go toward accelerating the company's battery management tech and build out the infrastructure of its field services.

A vertically integrated power provider, Branch Energy aims to provide customers with demand management software and battery storage systems to ensure long-term, stable, and clean energy at a lower cost than competitors.

“Our century-old grid design is not equipped for the complexity of today’s energy needs," Alex Ince-Cushman, Branch Energy co-founder and CEO, says in a news release. “Optimizing distributed energy assets in real-time will play an increasingly important role in managing the grid. We built Branch from the ground up as a technology company, allowing us to deliver value to customers in this new era of distributed energy by reducing costs while improving reliability."

The company chose Texas as its inaugural market based on the stress of the grid in the state, the company says in the release. Since 2021 when Branch Energy launched, it has signed up thousands of customers for its 100 percent clean energy service. The business proposition includes lowering customer's energy bills by 5 to 10 percent.

“The power grid, especially in Texas, requires distributed generation and flexible loads as basic economics drives deployment of more renewable resources,” Tim Woodward, managing partner at Prelude Ventures, adds. “Across the country, we are experiencing a major shift toward a decentralized and decarbonized grid. Branch Energy is bringing value to its customers through deployment of intelligent storage that lowers costs and improves reliability.”

Branch Energy, which is available now in some Texas regions, had previously raised $5.5 million in seed and pre-seed funding, per Crunchbase.

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Houston cleantech startup closes $17M round to tap into hot geothermal sector

fresh funding

Houston-area startup Hephae Energy Technology Corp. has closed a $17.8 million Series A financing round to commercialize its geothermal technology.

The round was co-led by Pennsylvania-based Susquehanna Sustainable Investments, which invests in early-stage climatech companies, and Copenhagen-based Underground Ventures, which focuses on geothermal energy startups. Alfa8, Baruch Future Ventures, Centaurus Capital LP, Elemental Impact, Exa Ventures, Future Ventures, Grantham Foundation for the Protection of the Environment, New System Ventures and True North Institute joined the round, along with existing Houston-based investor Nabors Industries. Hyphae reports in a news release that the Series A round brings the company's total capital raised to $24.7 million.

Hephae develops ultra-high-temperature downhole sensing, measurement, communications and control systems that can withstand the heat of geothermal sites, which are hotter and deeper than traditional oil and gas reservoirs. The company's Pandora210 system can operate at up to 400 degrees Fahrenheit.

Hephae reports that it plans to use the new funding to commercialize its Pandora210 tool and to launch research and development into systems that can withstand temperatures of up to 570 degrees Fahrenheit. Houston-based Fervo Energy, for instance, recently tapped its hottest geothermal well to date in western Utah, showing temperatures above 555 degrees Fahrenheit.

"Commercial deployment represents a major milestone in our mission to scalable, always-on, emission-free power globally, with a world-class team to tackle this problem," Steve Krase, CEO of Hephae Energy Technology, said in the release." This investment enables Hephae to transition from development to scale, delivering the ultra-high temperature drilling technologies needed to support the rapid growth of the geothermal industry in the US and international markets."

Hephae has been collaborating with Fervo Energy in the field. The company told the Houston Business JournalHouston Business Journal this spring that it expected its Pandora210 technology to be deployed at its Utah sites.

“Fervo is encouraged by the early progress of our collaboration with Hephae, whose novel high-temperature innovations have the potential to contribute positively to EGS economics, unlock higher-energy geothermal resources, and further cement the competitiveness of next-generation geothermal power," Elliot Howard, director of drilling and completions at Fervo, added in the release.

As the geothermal industry continues to scale, Hephae says it aims for its technology to help companies "unlock hotter, deeper resources that result in lower produced energy costs."

The Spring-based startup was founded in 2020 by CEO Steve Krase and CTO John Clegg. Krase previously launched Navigate Energy Services, which was acquired by Nabors in 2013. Clegg is also an industry veteran and has held numerous leadership positions at energy companies, including Weatherford, NOV, Schlumberger and others.

Houston clean energy events announce keynote speakers from Fervo, Phillips 66

where to be

Two Houston energy institutions will host their signature events this September and have named industry leaders as their keynote speakers.

The Rice Alliance Energy Tech Venture Forum and Greentown Lab's Climatetech Summit kick off Sept. 16. The events are part of Houston Energy and Climate Startup Week and Houston Energy and Climate Week.

The two-day Energy Tech Venture Forum will bring together climatech startups and professionals from around the world to hear pitches, participate in one-on-one office hours and connect with energy innovators.

Sean Maher, chief economist at Phillips 66, will open the forum with a keynote address on the macroeconomic forces shaping the energy industry. Maher also serves as vice president of investor relations at Phillips 66. He previously launched Third Gear Investments, a Houston-based energy investment firm.

Ira Ehrenpreis, founder and managing partner of DBL Partner, which manages more than $1 billion of capital and invests in companies driving social change, will present the keynote on the second day of the forum, Sept. 17. Ehrenpreis is a board member of Tesla and an investor of SpaceX. He will share insights on commercializing breakthrough technologies and what investors are looking for in today's energy innovations.

Applications for the Energy Tech Venture Forum close July 17. Register for the event here.

Fresh off a landmark IPO, Tim Latimer, co-founder and CEO of Houston-based Fervo Energy, will present the keynote at Greentown's Climatetech Summit. Latimer was recently named one of Fast Company's 2026 Visionaries of the Year.

He will be joined by Houston-based SCF Partners' David Baldwin, who will moderate the discussion. The conversation will focus on the timing of Fervo's IPO, what Latimer would have done differently at the early stages of the business, and why the company chose Houston as its headquarters.

The Climatetech Summit will bring together philanthropists, executives and innovators in the energy transition space. Greentown member startups will also present their pitches at the event. Learn more and secure tickets here.

13 Houston energy sector companies make U.S. News' best places to work

where to work

A new U.S. News & World Report ranking of the best employers has named two dozen Houston-based companies among the best companies to work in the South, and more than half are part of the region's booming energy sector.

U.S. News' prestigious "2026-2027 Best Companies to Work For" ratings examine 3,900 public and privately owned companies across 14 industries to help employees and job seekers make decisions about workplaces that may be a good fit.

Each company is rated on a scale of 1-5 across six metrics: quality of pay and benefits; work-life balance and flexibility; job and company stability; physical and psychological comfort; belongingness and esteem; and career opportunities and professional development.

"Job seekers' definitions of 'best' evolve with their needs," said Carly Chase, vice president of Careers at U.S. News. "From new grads in the AI era and seasoned pros seeking a career change, to HR leaders researching organizational trends, the ratings are a central hub that highlights businesses that U.S. News found effectively support their staff."

The number of employers headquartered in the Houston area that made the cut for 2026-2027 has skyrocketed over previous years. A total of 24 local public and private companies made the list this year, up from 16 companies in 2024 and 11 in 2025.

The highest concentration of top employers is located in Houston proper (20), followed by two companies in The Woodlands and one each in Kingwood and Spring.

Several leading Houston energy powerhouses on the list include petroleum corporation Occidental (Oxy) and oil and gas giants Chevron and Phillips 66.

Other energy sector companies on the list are:

  • EOG Resources, Houston
  • Targa Resources, Houston
  • TechnipFMC, Houston
  • Cheniere, Houston
  • Baker Hughes, Houston
  • KBR, Houston
  • CenterPoint Energy, Houston
  • Powell Industries
  • S&B, Houston
  • DXP, Houston
Here are the remaining best Houston-based companies to work for:
  • David Weekley Homes
  • Comfort Systems USA, Houston
  • Corebridge, Houston
  • Cornerstone Home Lending, Houston
  • Farouk, Houston
  • Hines, Houston
  • Insperity, Kingwood
  • HPE, Spring
  • Sterling Infrastructure, The Woodlands
  • LGI Homes, The Woodlands
  • PROS, Houston
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A version of this article originally appeared on CultureMap.com.
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