Choose Texas Power has ranked its top electric providers, most affordable green energy providers and more. Photo via unspalsh.

Choose Texas Power—a marketplace that allows users to view and compare electricity plans, providers and rates in the state—has compiled its Best Texas Electric Companies report.

The data-driven list considers pricing, providers and consumer trends, and rates for companies listed on its marketplace. The report was updated earlier this month.

Choose Texas Power rated the Texas energy companies using its proprietary data and online reviews, and gave each company a score from zero to five based on customer service, accessibility and plan variety.

Houston-based Express Energy tied for first place on the list with DFW-based TXU Energy, 4Change Energy and Veteran Energy. Eight other Houston-area companies made the 10. The companies all received a rating of 5 out of 5.

The full list includes:

  • Houston-based Gexa Energy (4.9)
  • Irving-based TriEagle Energy (4.9)
  • Houston-based Frontier Utilities (4.8)
  • Spring-based Atlantex Power (4.6)
  • Houston-based Rhythm Energy (4.6)
  • Houston-based Green Mountain Energy (4.5)
  • Houston-based Reliant Energy (4.3)
  • Houston-based Direct Energy (4.2)
  • Houston-based APG&E Energy (4.2)
  • Houston-based Discount Power (4)
  • Plano-based Cirro Energy (4)
  • Fort Worth-based Payless Power (3.9)

Choose Texas Power also broke down the best companies for specific customer needs.

  • Best for affordable green energy: Gexa Energy
  • Best for 100% renewable energy: Rhythm Energy
  • Green energy plans for low usage: Green Mountain Energy
  • Best for smart home upgrades: Discount Power
  • Best for straightforward energy plans: TriEagle Energy
  • Best for plan variety: TXU Energy
  • Best for simple contract terms: Express Energy

Find the full report here.

PJ Popovic, founder and CEO of Houston-based Rhythm Energy, which has acquired Inspire Clean Energy. Photo courtesy of Rhythm

Houston's Rhythm Energy expands nationally with clean power acquisition

power deal

Houston-based Rhythm Energy Inc. has acquired Inspire Clean Energy for an undisclosed amount. The deal allows Rhythm to immediately scale outside of Texas and into the Northeast, Midwest and mid-Atlantic regions, according to a release from the company.

Inspire offers subscription-based renewable electricity plans to customers in Pennsylvania, New York, New Jersey, Massachusetts, Ohio, Delaware, Illinois, Maryland, and Washington, D.C. By combining forces, Rhythm will now be one of the largest independent green-energy retailers in the country.

“Adding Inspire to the Rhythm family gives us the geographic reach to serve millions of new customers with the highly rated customer experience Texans already enjoy,” PJ Popovic, CEO of Rhythm, said in the release. “Together we become one of the largest independent green-energy retailers in the country and can roll out innovations like our PowerShift Time-of-Use plan and device-enabled demand-response programs that put customers fully in control of their energy costs.”

Rhythm was founded by Popovic in 2020 and offers 100 percent renewable energy plans using solar power, wind power and other renewable power sources.

In addition to scaling geographically, the acquisition will "(marry) Rhythm's data-driven technology with Inspire's successful subscription model." Rhythm also plans to upgrade its digital tools and provide more advanced services to help lower clean energy costs, according to the release.

Popovic spoke with EnergyCapital in 2023 about where he thinks renewables fit into Texas’s energy consumption. Read more here.

At last year's awards program, Cemvita Factory's co-founders, Tara and Moji Karimi, accepted the award for the Green Impact Business category. This year, Moji Karimi served as a judge

18 Houston energy startups named finalists for innovation awards program

companies to watch

The 2023 Houston Innovation Awards announced its 52 finalists — a large portion of which are promising energy transition startups.

The awards program — hosted by EnergyCapital's sister site, InnovationMap, and Houston Exponential — will name its winners on November 8 at the Houston Innovation Awards. The program was established to honor the best and brightest companies and individuals from the city's innovation community.

The following startups, which all have an energy transition element to their business, received a finalist position in one or two categories.

Click here to secure your tickets to see who wins.

  • ALLY Energy, helping energy companies and climate startups find, develop, and retain great talent, scored two finalist positions — one in the Female-Owned Business category and the other in the Social Impact Business category.
  • Eden Grow Systems, next generation farming technologies, is a finalist in the People's Choice: Startup of the Year category.
  • Feelit Technologies, nanotechnology for preventive maintenance to eliminate leaks, fires and explosions, increase safety and reduce downtime, is a finalist in the Female-Owned Business category and the People's Choice: Startup of the Year category.
  • Fervo Energy, leveraging proven oil and gas drilling technology to deliver 24/7 carbon-free geothermal energy, scored two finalist positions — one in the Sustainability Business category and the other in the People's Choice: Startup of the Year category.
  • FluxWorks, making frictionless gearboxes for missions in any environment, is a finalist in the Hardtech Business category.
  • Helix Earth Technologies, decarbonizing the built environment and heavy industry, is a finalist in the Hardtech Business category.
  • INOVUES, re-energizing building facades through its non-invasive window retrofit innovations, making building smarter, greener, and healthier for a better and sustainable future, was named a finalist in the Sustainability Business category.
  • Kanin Energy, helping heavy industry monetize their waste heat and decarbonize their operations, was named a finalist in the BIPOC-Owned Business and the Sustainability Business categories.
  • Mars Materials, developing a carbon-negative pathway for carbon fiber and acrylamide production using CO2 and biomass as raw materials, is a finalist in the BIPOC-Owned Business category.
  • Molecule, an energy/commodity trading risk management software that provides users with an efficient, reliable, responsive platform for managing trade risk, is a finalist in the Digital Solutions Business category.
  • Rhythm Energy, 100 percent renewable electricity service for residential customers in Texas, is a finalist in the People's Choice: Startup of the Year category.
  • Sage Geosystems, a cost-effective geothermal baseload energy solution company, also innovating underground energy storage solutions, was named a finalist in the Sustainability Business category.
  • Solugen, decarbonizing the chemical industry, is a finalist in the Hardtech Business category.
  • Square Robot, applying robotic technology to eliminate the need to put people into dangerous enclosed spaces and eliminate taking tanks out of service, is a finalist in the Hardtech Business category.
  • Syzygy Plasmonics, a deep decarbonization company that builds chemical reactors designed to use light instead of combustion to produce valuable chemicals like hydrogen and sustainable fuels, is a finalist in the Hardtech Business category.
  • Tierra Climate, decarbonizing the power grid faster by helping grid-scale batteries monetize their environmental benefits and change their operational behavior to abate more carbon, was named a finalist in the Sustainability Business category.
  • Utility Global, a technology company converting a range of waste gases into sustainable hydrogen and syngas, was named a finalist in the Sustainability Business category.
  • Venus Aerospace, a hypersonics company on track to fly reusable hypersonic flight platforms by 2024, is a finalist in the Hardtech Business category.

Additionally, two energy companies were named to the Corporate of the Year category, which honors corporations that supports startups and/or the Houston innovation community. Aramco Ventures and Chevron Technology Ventures are two of the four finalists in this category.

Lastly, Jason Ethier, co-founder of Lambda Catalyzer and host of the Energy Tech Startups podcast, and Kendrick Alridge, senior manager of community at Greentown Labs, scored finalist positions in the Ecosystem Builder category, as individuals who have acted as leaders in developing Houston’s startup ecosystem.

Click here to see the full list of finalists.

PJ Popovic of Houston-based Rhythm Energy looks back on summer heatwave trends. Photo via Shutterstock

Houston expert looks at wholesale pricing trends occurring this summer

guest column

This summer’s heatwave had a lot of Texans feeling uncomfortable, and it was not just the sweltering triple-digit temperatures, and even higher heat indexes, that had us sweating. With much of the state hitting over 100 degrees for weeks, air conditioners were working overtime to keep homes and businesses cool. That added load, coupled with general demand growth, put a heavy burden on the Texas power grid — and that puts the state in a precarious position.

We all remember Uri in February 2021, when an inch-thick coat of ice hampered power companies' ability to generate power, leading to widespread and lasting power outages across the state. The recent heat wave, however, was different. This past summer, the concern for Texas and ERCOT (the Electric Reliability Council of Texas) was not whether generation would fail, but whether generation capacity could keep pace with peak demand. And what would be the wholesale electricity price to ensure that it did.

The generation mix

As robust as our electricity grid is, on any given day the balance between power supply and demand remains fairly tenuous. In its summer Seasonal Assessment of Resource Adequacy, ERCOT projected its power-generation capacity at 97,000 MW. However, that daily capacity number can be misleading.

As Texas’ generation mix leans to a greater degree toward renewable power and we retire more coal and natural gas fired generation plants, our generation output becomes less predictable. Operators can practically flip a switch to turn on fossil fuel generation plants and quickly dispatch its power. Renewable generation, on the other hand, is intermittent and its output by no means guaranteed. While the state’s current combined wind and solar generation can potentially deliver up to 30,000 megawatts, if the right weather conditions are not there, neither is the power.

Meanwhile, the demand for power in Texas has increased dramatically. In recent years, we have seen significant population growth, electrification as well as new business expansion throughout the state. Some of the businesses moving here draw huge loads of power from the grid — think about the companies mining digital currency or Elon Musk’s SpaceX facilities in Central Texas, just to name a few. A considerable demand curve increase occurring simultaneously with the move to more renewable generation challenges the delicate balance of the grid.

Trends and lessons learned from the summer’s wholesale electricity pricing

ERCOT manages the flow of electricity across the state of Texas. It also oversees the wholesale bulk power market whereby generators are paid primarily for the electricity they supply to the grid. To incentivize the development of future generating capacity, ERCOT employs scarcity pricing — that means that commodity prices escalate dramatically as supply becomes constrained.

This summer, ERCOT faced unprecedented demand with daily electricity usage frequently nearing generation capacity limits. Consequently, electricity prices were notably volatile, often skyrocketing exponentially.

ERCOT employs a complex series of pricing mechanisms to establish its real-time price for each megawatt. A deep dive analysis (INSERT LINK) found that the Locational Margin Prices, or LMP, were significantly higher than previous years, even when reserve generation capacities were robust and fuel prices were similar to or lower than prior years.

So, what contributed to the higher than usual prices? Certainly, changes to ERCOT operations, market design tweaks, and transmission constraints contributed, but market prices were most driven by generators’ offer pricing curves.

Now, more than four months removed from the start of the heat wave in June, we can see how different various technologies priced their offerings. The data suggests that a segment of resources, notably battery storage, set their offer prices near or at the system-wide offer price cap. Given the anticipated rise of batteries as the primary dispatchable resource within the grid in coming years, this pricing behavior warrants closer scrutiny.

Offer pricing curves appear to have created a semblance of shortage pricing, evident in the heightened LMPs, even when reserve capacities were not especially scarce. This would suggest that a significant portion of the dispatchable capacity integrated into ERCOT was priced at levels typically seen only in grid emergency conditions

Key questions

Why are the recently added dispatchable resources garnering such high offer prices? Are there operational hurdles in integrating and dispatching batteries, challenges in market design, inherent limitations of batteries on the grid, or other factors contributing to these high offer prices from battery resources? Given that batteries are poised to play a central role in the transition to renewable energy sources, answering these questions will be key.

The current pricing trends in the ERCOT market, if sustained, could lead to increased electricity rates and/or increased price volatility for end-users, underscoring the importance of monitoring and addressing these market dynamics.

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PJ Popovic is the CEO of Houston-based Rhythm Energy.

The University of Houston's football season is starting off in a new conference — and with a new renewable energy partner. Photo via uh.edu

University plugs into Houston renewables co. as official athletics energy provider

go coogs

This college football season brings a lot of newness for the University of Houston: A new conference, following the athletic program's July transition to the Big 12. And a new official energy provider that is 100 percent renewable.

UH Athletics announced last week that Houston-based Rhythm Energy has signed on to be the official energy company of the program. The company will have a presence on signage at all sports venues, a strong digital presence across UH Athletics platforms; and Cougars’ basketball, baseball, softball, soccer, and track and field home events.

Rhythm Energy will also roll out The Go Coogs 12 Plan in time for football season, which will be an exclusive electricity plan to help UH faculty, alumni, students and fans go green.

“As a proud UH alumni, I am so pleased Rhythm Energy has become the Official Energy Company for my alma mater,” PJ Popovic, CEO of Rhythm Energy, said in a statement. “UH is hands down one of the top educational and athletic institutions in the nation, and I’m forever grateful for the knowledge I gained there, which allowed me to start my own renewable energy company. With UH joining the Big 12 Conference, we’re inspired by their success, achievements, and growth—something we strive for at Rhythm Energy every day.”

UH Athletics oversees 17 sport programs — seven on the men's side, including baseball, basketball, cross country, football, golf, and track and field, and 10 on the women's side, including basketball, cross country, golf, soccer, softball, swimming and diving, tennis, track and field, and volleyball.

Popovic founded Rhythm Energy in 2021. The company offers 100 percent renewable energy plans for Texas residents, using solar power, wind power and other renewable power sources.

The founder spoke with EnergyCapital last month about where he thinks renewables fit into Texas’ energy consumption and grid reliability issues and the shifting public opinion towards renewables.

"There is still a lot (speech) that is not necessarily painting renewables correctly," he tells EnergyCapital.

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Fervo Energy leads Time’s top green tech companies of 2026

top spot

The accolades keep coming for Houston-based geothermal energy company Fervo Energy.

Fervo sits atop Time magazine’s and Statista’s 2026 list of America’s Top GreenTech Companies. Fervo ranked No. 6 on the list last year.

The ranking honors 250 companies in the U.S. based on their environmental impact, innovation and financial strength. Fervo joins five other Houston-area companies on the list.

  • No. 49 Quaise Energy, an MIT Energy Initiative spinout that’s developing a drilling system designed to convert existing power stations for geothermal power production
  • No. 71 Plus Power, which develops, owns and operates battery energy storage systems
  • No. 98 Utility Global, whose technology enables industrial decarbonization
  • No. 199 Solugen, whose technology converts plant-based feedstocks into carbon-negative chemicals
  • No. 215 Noodoe, which specializes in EV charging stations and software

Fervo says its approach to enhanced geothermal systems (EGS)—including horizontal drilling, AI-enabled drilling and exploration, advanced reservoir engineering, and fiber-optic sensing—demonstrates how validated technology can help deliver reliable zero-emission power.

“By applying drilling technology from the oil and gas industry, we have proven that we can produce 24/7 carbon-free energy resources in new geographies across the world,” Fervo co-founder and CEO Tim Latimer said last year.

Other recent recognitions for Fervo includes:

  • The 2025 Houston Innovation Awards named it Scaleup of the Year
  • MIT Technology Review put Fervo on its 2025 list of the 10 global climatech companies to watch
  • Time named Fervo one of the 100 Most Influential Companies of 2025
  • Fervo was hailed as the Global Cleantech Group 100 North American Company of the Year
  • Fervo was among Congruent Ventures’ and Silicon Valley Bank’s 50 by 2050 companies, all of which are poised to advance global decarbonization over a 25-year span
Just last month, Fervo secured $421 million in debt financing for the construction of its 500-megawatt Cape Station geothermal project in Utah. And in December, the company landed an oversubscribed $462 million Series E round of funding, pushing its valuation to an estimated $1.4 billion. Fervo filed for an IPO earlier this year.

3 strategies to strengthen the Gulf Coast as a global energy hub

The View from HETI

The Texas-Louisiana Gulf Coast is the backbone of America’s energy and chemical economy. Texas produces roughly 43% of U.S. crude oil and 28% of natural gas, while Texas and Louisiana together account for about half of the nation’s refining capacity, processing 9.3 million barrels of crude per day across 50 refineries. The region also produces approximately 80% of the nation’s primary petrochemicals and ships more than $117 billion in chemical products annually from Texas alone.

This unmatched concentration of refining, petrochemical manufacturing, pipelines, ports, and technical talent makes the Gulf Coast one of the most critical energy hubs in the world. But maintaining that leadership in a rapidly evolving global market will require intentional collaboration, faster technology commercialization, and strengthened supply chain resilience.

In fall 2025, the Greater Houston Partnership’s Houston Energy Transition Initiative (HETI) convened national laboratories, Gulf Coast universities, and industry leaders to examine how to reinforce the region’s long-term competitiveness. Participants included Argonne, Oak Ridge, Lawrence Berkeley, the National Energy Technology Laboratory (NETL), and the National Laboratory of the Rockies, alongside Gulf Coast academic institutions and energy and chemical companies. Here are the key findings and takeaways from the workshop.

1. Supply Chain Resilience Requires Structured Industry–Lab Collaboration

Resilience—diversity of supply, operational flexibility, and rapid recovery—was a recurring theme. Recent disruptions exposed vulnerabilities in tightly interconnected energy and manufacturing systems.

National laboratories provide capabilities that complement Gulf Coast industrial scale, particularly at early and mid technology readiness levels (TRLs 1–7), before full commercial deployment. Examples include:

  • Advanced manufacturing and AI-enabled validation of critical components (Oak Ridge).
  • Materials scale-up and techno-economic modeling to move from lab discovery to industrial relevance (Argonne).
  • Pilot-scale testing for severe-service alloys, chemical conversion, and process innovation (NETL).
  • Integrated energy systems modeling to assess grid resilience and system disruptions (National Laboratory of the Rockies).

Recommendation: Organize targeted Gulf Coast industry missions to national laboratories focused on critical supply chains—power equipment, high-heat industrial processes, novel catalysts, refining, and grid infrastructure—to identify joint development opportunities and reduce time to commercialization.

2. Modeling, AI, and Open-Access Platforms Can Bridge the Technology Gap

A persistent barrier to innovation is the gap between scientific discovery, applied development, and commercial deployment. Universities often operate at TRLs 1–3, national labs at 1–7, and industry at 7–9. Bridging these silos requires shared modeling tools, high-performance computing, and structured feedback loops.

National labs maintain open-access platforms capable of:

  • Simulating grid expansion, investment, and dispatch decisions.
  • Modeling cradle-to-gate industrial material flows.
  • Optimizing complex energy and chemical systems.
  • De-risking carbon capture, critical mineral recovery, and advanced manufacturing integration.

Recommendation: HETI should convene structured training and feedback sessions on these public modeling platforms—ensuring Gulf Coast industry can apply, improve, and help guide further development of tools critical to regional competitiveness. Federal initiatives such as the Genesis Mission, focused on AI-accelerated scientific discovery, further expand opportunities for Gulf Coast participation.

3. Time to Commercialization Is the Ultimate Competitive Metric

The lithium-ion battery is a cautionary example: while pioneered in U.S. labs, large-scale manufacturing leadership shifted overseas. Without strategic intervention, U.S. firms are projected to capture less than 30% of domestic lithium battery cell value by 2030.

Successful DOE-backed consortium models show that mission-aligned, multi-partner collaboration reduces development timelines and strengthens domestic manufacturing know-how. However, public–private partnership mechanisms such as CRADAs and Strategic Partnership Projects can be time-intensive.

Recommendation: The Gulf Coast should actively engage DOE and national laboratories to streamline public–private partnership pathways, improve intellectual property clarity, and expand industry access to laboratory infrastructure.

The Path Forward: A Gulf Coast Consortium Model
The workshop’s central conclusion was clear: the Gulf Coast should formalize collaboration through a regional industry–academia–laboratory consortium.

Such a model could:

  • Co-locate national lab researchers within the region.
  • Share modeling data and analytical capabilities.
  • Establish open-access pilot facilities that complement lab infrastructure.
  • Harmonize IP frameworks to accelerate licensing and deployment.

With its dense industrial ecosystem, technical workforce, and decision-making concentration, the Gulf Coast is uniquely positioned to serve as a national demonstration hub for advanced energy and chemical manufacturing.

If industry, universities, and national laboratories align around a shared regional strategy, the Gulf Coast can:

  • Accelerate commercialization timelines.
  • Strengthen critical supply chains.
  • Unleash a world-class technical workforce.
  • Reinforce U.S. leadership in strategic energy and chemical sectors.

———

This article originally appeared on the Greater Houston Partnership's Houston Energy Transition Initiative blog. A full report on the key learnings and recommendations from the workshop can be found here: https://bit.ly/4uEDEqk.

Houston cleantech company closes $12M seed round

fresh funding

Houston-based Helix Earth Technologies has closed a $12 million Seed 2 funding round to scale manufacturing of its energy-efficient commercial HVAC add-on technology.

Veriten, a Houston-based energy investment firm, led the round. Rua Ventures, Carnrite Ventures, Skywriter LLC and Textbook Ventures also participated.

Helix Earth—which was founded based on NASA technology, spun out of Rice University and has been incubated at Greentown Labs—is developing high-efficiency retrofit dehumidification systems that aim to reduce the energy consumption of commercial HVAC units. The company reports that its technology can lead to "healthier indoor air, lower energy bills, reduced building maintenance, and more comfortable spaces for building owners and occupants."

"Building owners are dealing with rising energy costs, uncontrolled humidity, and aging infrastructure with no viable, cost-effective path forward. We are in the field today solving these problems for commercial customers, and this capital puts us on an aggressive path to scale,” Rawand Rasheed, Helix Earth co-founder and CEO, said in a news release.

“The strength of this round reinforces our team's conviction that we can transform innovation-starved sectors with transformational solutions that deliver order-of-magnitude improvements to owners and operators, for both their bottom line and the environment,” Rasheed added.

Maynard Holt, Veriten’s founder and CEO, said that the investment firm is tripling its investment in Helix Earth.

"The team has built breakthrough technology with real applicability across multiple industries,” Holt said in the release. “Their first product will have an immediate and measurable impact on our energy system, and they are already pursuing adjacent innovations to help heavy industries operate more efficiently and with less waste. This is a well-rounded team with a proven track record of strong execution and disciplined capital management.”

Helix Earth also closed a $5.6 million seed funding round in 2024, led by Veriten.

Last year, the company secured a $1.2 million Small Business Innovation Research (SBIR) Phase II grant and won in the Smart Cities, Transportation & Sustainability contest at the 2025 SXSW Pitch Showcase. Rasheed was also named to the Forbes 30 Under 30 Energy and Green Tech list for 2025.