3 Houston companies land on Deloitte’s Technology Fast 500 list

trending up

Three Houston companies ranked on Deloitte's annual list, with two cracking the top 100. Photo via Getty Images

Three Houston companies have made this year’s Deloitte North America Technology Fast 500 list.

The report ranks the fastest-growing technology, media, telecommunications, life sciences, fintech, and energy tech companies in North America. The Houston companies to make the list, along with their revenue growth rates from 2021-2024, include:

  • No. 16 Action1 Corp., a provider of cybersecurity software. Growth rate: 7,265 percent
  • No. 92 Cart.com, a commerce and logistics platform. Growth rate: 1,053 percent
  • No. 312 Tellihealth, a remote health care platform. Growth rate: 244 percent

“Houston’s unique blend of entrepreneurial energy and innovation continues to strengthen the local business community, and I’m thrilled to see Houston companies honored on the 2025 Deloitte Technology Fast 500 list. Congratulations to all the winners,” said Melinda Yee, managing partner in Deloitte’s Houston office.

Action1 is no stranger to lists like the Deloitte Technology Fast 500. For instance, the company ranked first among software companies and 29th overall on this year’s Inc. 5000, a list of the country’s fastest-growing private companies. Its growth rate from 2021 to 2024 reached 7,188 percent.

Mike Walters, president and co-founder of Action1, said in August that the Inc. 5000 achievement “reflects the dedication of Action1’s global team, who continue to execute against an ambitious vision: a world where cyberattacks exploiting vulnerabilities are entirely prevented across all types of devices, operating systems, and applications.”

Atlanta-based Impericus, operator of an AI-powered platform that connects health care providers with pharmaceutical and life sciences companies, topped the Deloitte list with a 2021-24 growth rate of 29,738 percent.

“Our mission is to set the standard for ethical AI-powered physician connections to pharma resources, accelerating and expanding patient access to needed treatments,” said Dr. Osama Hashmi, a dermatologist who’s co-founder and CEO of Impiricus. “As we continue to innovate quickly, we remain committed to building ethical bridges across this vital ecosystem.”

From Your Site Articles
Four Houston companies ranked on Deloitte's annual list, but none were able to crack the top 100. Photo via Getty Images

Annual report ranks 4 Houston tech companies on list of fasting growing businesses

trending up

Deloitte just unveiled the fastest-growing technology companies in North America — and four businesses from Houston made the cut.

For the 29th year, 2023 Technology Fast 500 ranked top tech, media, telecommunications, life sciences, and energy technology companies based on fiscal year revenue growth from 2019 to 2022. While no Houston business was able to break into the top 100, four did make the cut for this year's list.

“It is great to see Houston represented alongside established technology hubs on this year’s Fast 500 list,” Amy Chronis, vice chair, US Energy and Chemicals Leader and Houston managing partner at Deloitte, says in a statement. “Houston is planting seeds for future innovation, and the companies named to this year’s list confirm our city’s value proposition as an innovative community. We look forward to this growth continuing in the future and extend our congratulations to this year’s Houston winners.”

The four Houston companies that make the 2023 list are:

  • Direct Digital Holdings at No. 108 with 1,325 percent growth
  • Liongard at No. 208 with 680 percent growth
  • NatGasHub.com at No. 356 with 364 percent growth
  • P97 Networks at No. 506 with 225 percent growth

Thirty Texas companies made the list of the 541 ranked, making it the fourth most concentrated hub on the list behind the Bay Area, Tri-State Area, and New England. The companies on the list reported a revenue growth ranging from 201 percent to 222,189 percent over the three-year time frame from 2019 to 2022. The average growth rate was 1,934 percent and a median growth rate of 497 percent.

“Each year, we look forward to reviewing the progress and innovations of our Technology Fast 500 winners," Paul Silverglate, vice chair, Deloitte LLP and U.S. technology sector leader, says in the release. "This year is especially celebratory as we expand the number of winners to better represent just how many companies are developing new ideas to progress our society and the world, especially during a slow economy. While software and services and life sciences continue to dominate the top 10, we are encouraged to see other categories making their mark."

Software dominated the industry breakdown with 57 percent of the companies working in that field. However, the top company for 2023 was Vir Biotechnology Inc., a life science company that developed a COVID-19 treatment. Vir was also the top company in 2022.

Last year, only one Houston company made the list. At No. 372 Onit reported a revenue increase of 369 percent. The company also made the 2021 list, along with Graylog and Enercross.

The Texas Medical Center is buzzing with recent innovation news, from Texas A&M University naming its buildings, Houston Methodist is introducing a new technology, and more. Photo by Dwight C. Andrews/Greater Houston Convention and Visitors Bureau

Startup closes series A, Houston hospital taps into new tech, and more local innovation news

short stories

Houston's innovation ecosystem has been booming with news, and it's likely some might have fallen through the cracks.

For this roundup of short stories within Houston innovation, Deloitte is looking for tech companies to honor, a few Houston innovators have fresh funds, buildings rising in the Texas Medical Center now have names, and more.

Texas A&M names buildings in Innovation Plaza

Texas A&M University has named the buildings that will be a part of its Innovation Plaza. Photo courtesy of Texas A&M University System

The Texas A&M University System has revealed the names of the three buildings in the Texas A&M Innovation Plaza rising near the Texas Medical Center: Discovery Tower, Life Tower, and Horizon Tower.

Discovery Tower is the future home of A&M's EnMed program and is currently being renovated from an 18-story office building. Life Tower, which is expected to deliver in June 2022, is a 19-story, 714-bed student housing tower for Texas A&M medical students and Prairie View A&M University nursing students. Lastly, the Horizon Tower will be a 17-story, 485,000 square-foot integrated building that will feature a 13-story parking structure at the bottom.

SecurityGate closes series A

Ted Gutierrez, CEO of SecurityGate, announced the closing of his company's series A. Courtesy of Security Gate

SecurityGate.io, a software-as-a-service cybersecurity startup based in Houston, has closed its series A fundraising round. Houston Ventures led the capital raise. The amount raised has not been disclosed.

"It was very attractive to us how tightly tuned SecurityGate.io is to the needs of their customers," says Chip Davis, managing partner at Houston Ventures, in a news release. "Successful enterprise software companies generally know they are instruments of change for their customers."

Davis says the feedback from SecurityGate's customers was what sealed the deal.

"Digital transformation is no easy task in highly dynamic environments, especially when the risk of cyberattacks keeps rising daily. We're excited to partner with Houston Ventures who sees this market growing, and our clients that see our vision of the future," says Ted Gutierrez, CEO of SecurityGate, in the release.

Well Health launches at Houston Methodist

Thanks to tech from the West Coast, a Houston hospital has optimized virtual visits. Courtesy of Methodist Hospital/Facebook

Through a partnership with California-based WELL Health Houston Methodist was able up the ante on virtual visits during the pandemic. According to a news release, WELL enabled Houston Methodist to deliver over 260,000 text messages to patients Houston Methodist. The messages educated them about virtual care, schedule visits, and more.

"The ability to communicate back and forth, assuring patients that we are here for them both virtually and in-person is crucial as we continue to safely provide care in the midst of this pandemic," says Tesha Montgomery, vice president of operations and patient access at Houston Methodist, in the release.

Houston podcast network raises over $1 million

A podcast network with Houston ties has raised a seed round. Pexels

Lemonada Media, a podcast network with Houston roots that launched in September, has raised $1.38 million in a seed funding round led by Blue Collective, an early-stage venture capital firm. The fresh funds will allow for strategic growth for the two co-founders, Jessica Cordova Kramer, CEO, and Houstonian Stephanie Wittels Wachs, chief creative officer. Lemonada also plans to hire several positions including vice presidents across finance, production, and marketing.

"We are slated to be a content and talent incubator, spinning out new audio concepts and hit series that present humanity, unfiltered," says Wittels Wachs in a news release. "Now more than ever, people are hungry for content that addresses their lived experience, those that are mundane, and those that may be painful and isolating. Because our company was built off a mountain of personal grief and loss, Lemonada is well-situated to cut through the noise, create beautiful works of art, and make people laugh and feel less alone along the way."

Deloitte is looking for tech companies for annual competition

For the 26th year, Deloitte is looking for cutting edge tech companies. Photo courtesy of Deloitte

Deloitte has opened applications for its 2020 Technology Fast 500. The application is available online and closes July 17. To be eligible for the award, the startup must be in business for a minimum of four years, have its headquarters in North America, have fiscal year 2016 operating revenues of at least $50,000, a fiscal year 2019 operating revenues of at least $5 million USD with a growth rate of 75 percent or greater, and own proprietary intellectual property or proprietary technology which must be sold to customers in products or services that contribute to a majority of the company's operating revenues, according to the contest's rules.

Companies should also fall within one of the following industry categories: biotechnology/pharmaceutical, communications/networking, digital content/media/entertainment, electronic devices/hardware, energy tech, medical devices, semiconductor, or software/SaaS.

Lazarus 3D delivers PPE to Haiti

A few Houston innovators have helped get Haitians critical PPE. Photo courtesy of Orolait

A few Houston innovators have helped connect health care workers in Haiti to some PPE. Ana Rojas Bastidas, founder of Orolait, and Jacques and Smriti Agrawal Zaneveld of Lazarus 3D, teamed up to ship over 1,000 pieces of PPE to United States Foundation for the Children of Haiti which supported orphanages, schools, and a hospital called Hopital Espoir.

In the middle of April, Bastidas saw the organization's need for PPE and saw how Lazarus 3D was creating materials. The group in Haiti received the supplies by the beginning of June.

"I'm really proud of the collaboration between myself and the Lazarus 3D team," Bastidas says. "Smriti and Jacques are absolute gems and while our businesses are completely separate, we found a common problem we both had the resources to tackle."

CryptoEQ begins offering consulting packages

Need custom cryptocurrency support? CryptoEQ is here to help. Courtesy of CryptoEQ

A cryptocurrency startup based in Houston has expanded its service to include custom-consulting packages.

"With our personalized packages, gain the market insights you need to refine your cryptocurrency investing and trading strategies," writes Spencer Randall, co-founder and principal of CryptoEQ.

The packages come at three levels: the enthusiast, the professional, and the expert. The individualized support begins at $499, and more information can be requested from the startup by emailing team@cryptoeq.io.

The East End Maker Hub receives a huge grant, Chevron commits to two tech companies, and more in this Houston innovation news roundup. Courtesy of The East End Maker Hub

City council approves $24M for East End hub, TMCx opens apps, and more Houston innovation news

Short stories

Houston is busting at the seams with innovation news as the ecosystem prepares to wrap up its year of growth. From grants and M&A activity to expansions and awards, there's a lot of news you may have missed.

In this latest news roundup, millions of federal funds are doled out, a female networking app commits to Houston, an accelerator launches applications, and more.

Makerspace in the East End to receive $24 million in federal funds

The East End Maker Hub

The East End Maker Hub plans to move tenants in next summer. Courtesy of TXRX

Last week, the Houston City Council voted in approval of $24 million in federal funds going toward a makerspace in the East End. The renovated 307,000-square-foot East End Maker Hub will be a place for education, training, and small-batch manufacturing.

The project is a collaboration between Urban Partnerships Community Development Corp., or UP CDC, and TXRX Lab, which will occupy around 60,000 square feet in the facility. The rest of the space will be leased out to startups.

The $37 million project is also being funded by a $5 million grant from the Economic Development Association, $7 million from New Market Tax Credits, and around $1.25 of TXRX's funds, including funds the nonprofit raised in donations.

The new facility is expected to create over 400 jobs, reach 14,000 young people annually, and support 100 small urban manufacturers, including 20 startups. The purchase close is planned for this month, and construction will begin next month. The first tenants are slated to move in next summer.

TMCx opens applications for redesigned accelerator program

The revamped TMCx program is accepting applications until December 13. Courtesy of TMC

Applications for the Texas Medical Center Innovation Institute's new and improved accelerator program are open for the spring 2020 cohort. Life science startups from around the world can apply online.

After celebrating five years of digital health and medical device startup acceleration, TMCx announced its team had been working to rethink the program to make it more something TMC's member institutions can benefit from.

Themes for the upcoming cohort include remote monitoring, virtual care, hospital efficiency, accessibility, and ideating for the clinics and operating rooms of the future.

Applications close on December 13, and finalists for an in-person bootcamp will be announced by the end of January for the two-week program from February 24 to March 6. After the program, TMCx will select the cohort members on March 20. The program then will run five sessions from April to August before a showcase slated for September.

Chevron Technology Ventures makes two strategic investments

Chevron Technology Ventures, lead by CEO Barbara Burger, has committed to two California-based companies. Courtesy of CTV

Chevron's Houston-based tech investment arm, Chevron Technology Ventures, made two moves recently. Silicon Valley-based NovoNutrients was invited to join the CTV Catalyst Program and Palo Alto, California-based Orbital Insight closed a recent round with help from CTV.

NuroNutrients, which has developed a way to create proteins through carbon capture, is the first biotech company to join CTV's Catalyst Program. The program will help advance the company's technology through market validating opportunities like pilot programs.

Orbital Insight, a geospatial analytics software company, closed its series D funding round at $50 million. The round was led by Sequoia Capital and Clearvision Ventures with contribution from CTV, as well as from Invicta Growth, Bunge Ventures Ltd, Goldman Sachs, Tech Pioneers Fund, and others. The company has raised over $125 million of funding since its founding in 2013.

Houston SaaS company makes acquisition

Coworking Space

A Houston company specializing in digital workplace software solutions has made a strategic acquisition following an exit to private equity. Getty Images

Houston-based iOFFICE, a software-as-a-service company providing solutions in the digital workplace experience, recently acquired Canadian management software entity, Hippo CMMS.

"Incorporating Hippo's solution into iOFFICE's broader application suite is a logical next stage in our company's evolution," says Mark Peterson, CEO of iOFFICE, in a news release. "As one of the leading native SaaS, asset management systems on the market today, Hippo is an ideal fit to join our brand. Their culture is very much like our own - they're strong and they move fast. Their offerings are robust, agile and they share our passion for disrupting the market with solutions that are unlike any other."

iOFFICE was recently acquired by Chicago-based private equity, Waud Capital, which has opened doors for the company to grow at a rapid pace.

Two Houston companies rank on Deloitte's annual Technology Fast 500 list

Two Houston companies made Deloitte's international list of growing tech companies. Shobeir Ansari/Getty Images

Two Houston companies have secured spots on Deloitte's annual Technology Fast 500 annual Technology Fast 500. Onit came in at No. 249, and symplr just made the list at No. 495. In its 25th year, the list represents the fastest-growing tech, media, life science, energy tech, and telecommunications companies from around the world.

The top company on the list was New York-based UiPath, which also has a large office in Houston. The company reported 37,458 percent growth. The 500 companies represent 41 states and provinces in North America, and Silicon Valley companies made up 19 percent of the list. New York City companies held on to 12 percent of the list, the New England region comprised 8 percent of the list, Washington D.C. companies were 7 percent of the list, and Los Angeles companies represented 5 percent of the 500 companies.


HerHeadquarters app plans to launch in Houston ahead of relocation

herheadquarters

HerHeadquarters is rolling out its app locally ahead of relocating to Houston. Courtesy of HerHeadquarters

Female-founded, female-focused tech company, HerHeadquarters, has plans to relocate its business operations to Houston — but first, it's rolling out its app to local female executives. The app plans to go live for the over 103,000 female CEOs in Houston on November 25.

The app's user experience is focused on making digital connections between women-run organizations. The app is live in Los Angeles, Miami, and New York City and is expected to launch simultaneously in San Francisco.

"These collaborations give them the power to increase revenue, company exposure, and expand their territory. We're excited Houston women entrepreneurs get to experience a faster and easier way to secure powerful partnerships, " says founder and CEO of HerHeadquarters, Carina Glover, in a news release.

HighRadius expands to Amsterdam

The Houston-based SaaS company is opening its fourth office to support its growth in Europe. Photo via highradius.com

Houston-based HighRadius Corp., a growing fintech software-as-a-service company, has announced a new office in Amsterdam just three years after opening its London office. Since entering the European market, the region has seen a 400 percent increase in bookings. The company, which has its headquarters in West Houston, also has an office in India.

"Automating order-to-cash and treasury management is a problem that transcends borders," says Sashi Narahari, founder and CEO of HighRadius, in a news release. "Building on the recent addition of Jon Keating as our general manager for EMEA, we continue to invest aggressively in the European market with the opening of our Amsterdam office."

Fannin Innovation Studio granted $2 million for new study

microscope

Getty Images

Houston-based Fannin Innovation Studio has received a $2,000,000 Phase II Small Business Innovation Research grant from the National Institute of Health. The grant is for the development of the ChorioAnchor device, which is designed to reduce preterm birth and infections in fetal surgery.

The device is being developed in partnership with Fannin, Texas Children's Hospital, Baylor College of Medicine, and Texas A&M University. The grant will be delivered over the next two years to devlop the device for pre-clinical and clinical testing.

"The ChorioAnchor has the potential to reduce these complications by providing mechanical support to the chorioamniotic membranes following fetal surgery, thus reducing the risk for chorioamniotic separation and PPROM," says Dr. Jimmy Espinoza of Texas Children's and BCM in a news release. "The additional support from the NICHD in the form of a Phase II SBIR grant will significantly help in refining the ChorioAnchor device with the objective of obtaining an investigational device exemption from the FDA to evaluate the efficacy and safety of the device in fetal surgeries."

Zibrio named honoree at CES Innovation Awards

The Zibrio SmartScale received national recognition at CES this year. Courtesy of Zibrio

Houston-based Zibrio, which developed a scale for measuring balance, has been named an honoree for CES Innovation Awards. The company has been invited to exhibit in the 2020 showcase.

Zibrio, founded in 2015 by Katharine Forth and Erez Lieberman Aiden, has a technology that came out of the founders' research at NASA. The medical device allows users to keep track of their balancing abilities as its convenient for them, and is especially helpful for the aging population.

Ad Placement 300x100
Ad Placement 300x600

CultureMap Emails are Awesome

Property Showcase

Houston ranks among world’s top 30 emerging startup ecosystems

Startup Status

Long known as the Energy Capital of the World, Houston also ranks among the world’s top 30 emerging startup ecosystems, according to a new report.

The report from Startup Genome, a research and advisory organization, doesn’t assign a specific numeric ranking to Houston’s startup ecosystem. Rather, it puts Houston in the ranking range of 21 to 30 for emerging ecosystems. Startup Genome weighed factors such as early-stage funding, performance and talent to identify the top emerging ecosystems.

Houston also gained notice for being one of the world’s 20 emerging ecosystems with at least four unicorn startups in the past 10 years. Houston and nine other ecosystems each had four unicorns.

According to StartupBlink, a startup research platform, Houston’s startup ecosystem grew 24 percent in 2025, with over 1,300 startups and total startup funding exceeding $808 million. StartupBlink places Houston at No. 46 among the world’s top 100 startup ecosystems.

In a recent post on LinkedIn, David Horsup, executive in residence at the Rice Alliance Clean Energy Accelerator, wrote that Houston “has all the ingredients to be wildly successful if it stays true to its differentiated pillars that drive the economy — energy, medical, and aerospace.”

Mumbai topped Startup Genome’s list of emerging ecosystems, followed by Istanbul, Madrid, Salt Lake City-Provo and Barcelona. After Salt Lake City-Provo, the top U.S. ecosystems were Phoenix, Detroit, Minneapolis and Las Vegas.

Silicon Valley led Startup Genome’s ranking of the world’s top established ecosystems, followed by New York City, London, Tel Aviv and Boston. Austin landed at No. 18 in this category and Dallas at No. 27.

“For much of the past decade, this report has chronicled the welcome dispersion of opportunity beyond the traditional hubs,” Startup Genome writes. “That trend has not died — but it has been complicated. Capital and scale are consolidating once more, particularly in the United States, and the gap between leading and emerging ecosystems is widening.”

KBR names C-suite duo to lead $5.3B government services spinoff

new leaders

In advance of the spinoff of its Mission Technology Solutions unit, Houston-based KBR has made two C-suite hires for the new business.

Michael LaRouche is coming aboard as president and CEO of the spinoff, currently called SpinCo, on Sept. 26. Nicholas Veasey is joining as executive vice president and chief financial officer on July 1.

“Michael and Nick bring a highly complementary combination of operational leadership, financial expertise, and mission-driven experience, and together they will accelerate our impact for stakeholders,” Stuart Bradie, chairman, president and CEO of publicly traded KBR, said in a news release.

LaRouche currently is CEO of Serco North America, a Herndon, Virginia-based government services contractor. Veasey most recently was CFO of MAG Aerospace, a Fairfax, Virginia-based defense contractor.

SpinCo, a government services contractor, will launch with more than $5.3 billion in annual revenue and 20,000 employees. KBR’s total headcount is around 36,000. Branding for SpinCo, including a formal name, will be revealed in July.

“SpinCo is positioned as a top-tier provider of differentiated technology solutions, anchored by deep mission expertise, global scale, and a relentless commitment to delivering for our customers,” LaRouche says.

After the spinoff, the slimmed-down KBR will focus on its Sustainable Technology Solutions business, a provider of energy and industrial technology that generated $2.5 billion in revenue in 2025. Bradie will remain chairman, president and CEO of the business.

Both SpinCo and the new KBR will be public companies. The spinoff is scheduled to be completed in January.

Experts: Houston's VC ecosystem has set the foundation — now we need scale

guest column

Fervo Energy went public earlier this summer. The Houston geothermal company priced its IPO at $27 per share, raised $1.89 billion, and opened the next morning at a market capitalization north of $10 billion. By most measures, it is the largest venture-backed cleantech IPO in history and an unambiguous win for Houston. It’s also a useful moment to look at where Houston's venture ecosystem stands and where it can go. The highlight: Houston's venture ecosystem has real foundations and, with increased company formation activity, can grow into the scale our city's ambitions deserve.

A Houston energy story in the national recovery

The recent uptick in Houston venture activity follows national trends. U.S. venture deal count contracted roughly 22 percent from its 2021 peak through 2024 before rebounding to about 16,700 rounds in 2025. Houston's 23 percent increase in VC funding from 2023 to 2024 is part of a national recovery of comparable magnitude over the same time window.

The energy sector is where Houston exhibits unique trends—and where the story turns clearly positive. (Houston's strong health and space sectors deserve their own separate consideration.) By deal count, energy-related rounds have accounted for 15 to 20 percent of Houston activity, roughly consistent over the past few years.

By capital, energy's share surged from about 14 percent in 2023 to over 60 percent in 2025, driven by a small number of large Houston-headquartered rounds, primarily in geothermal and related technologies. Fervo is the obvious anchor, but Sage Geosystems, Quaise Energy, Zeta Energy, Vaulted Deep, Applied Carbon and Mariana Minerals have all closed meaningful rounds. Houston is concentrated and accelerating as an energy capital market, an invaluable position to build upon.

From foundation to scale

The institutional pieces are in place. Greentown Labs, Activate, the Ion and others have built sector-specialized infrastructure most cities would struggle to assemble. Fervo itself is an alum of both Activate and Greentown Labs. Mercury Fund closed its $160 million Fund V, its largest ever. Houston Angel Network, GOOSE Capital, Fathom Fund, and broader pre-seed and seed capital coverage are here. The Houston $10 million-plus Series A list now includes 40 rounds since 2021, which break roughly into two eras. While 2021 to 2022 was biotech-heavy, with companies like Sporos Bioventures, RadioMedix, Cellenkos and Coya Therapeutics, 2024 to 2025 has tilted clearly toward energy, climate, and critical minerals, with Vaulted Deep, Applied Carbon, Mariana Minerals, Sage Geosystems and Ignis H2 Energy among them.

What’s less developed is the volume of seed-stage companies flowing into that capital. Imagine a dozen more Fervos coming out of that infrastructure over the next decade, each generating jobs, recycled founder capital, and the next wave of operators and angel investors. That is the kind of opportunity Houston has within reach if we build the company-formation pipeline to feed it. To be relevant on the national stage as a venture market, and to drive an economy the size of Houston's into the 2030s, the city needs to be doing closer to 20 Series A rounds per month rather than per year. That throughput implies roughly 1,000 seed rounds per year, feeding the funnel at a 20 percent to 30 percent graduation rate. Reaching such throughput depends on how many new founders Houston produces and how quickly our innovation ecosystem can help them achieve lift-off.

Houston in context

The comparative picture brings the scaling challenge into focus. Between 2021 and 2024, Houston-area startups closed between 126 and 153 disclosed venture rounds per year, against a national count between 9,854 and 14,125. That places Houston at a little over 1 percent of the U.S. deal count. For comparison, Austin ran about three times Houston's deal count each year.

At the Series A level, Houston closed between 12 and 24 rounds in any given year. The median Houston Series A across the period was about $10.7 million, compared with $15.4 million in San Francisco. Houston founders are raising fewer and smaller Series A rounds than founders in peer metros, which points directly to where Houston has the most room to grow.

The unicorn picture tells the same story. From 2021 through 2025, the U.S. produced 590 venture-backed unicorns. Four were Houston-based: Solugen and Axiom Space in 2021, Cart.com in 2023, and Fervo Energy in 2024. Adding HighRadius from 2020 brings Houston's all-time total to five. Austin added 19 over the same five-year window. The path from here is to make Houston's entries on lists like these less the exception and more the rule.

Where this leads

Houston has a real opportunity to become the deepest, most credible energy and climate capital market in the country, with the company formation, talent and operator density to support it. The data shows the foundation is already in place. Fervo, Solugen and the growing roster of energy-adjacent Series A graduates are proof. Fervo's IPO is the first of what should be many. Houston has not had a venture-backed cleantech liquidity event of this scale before, and the city now has one to reference, recruit against and build on. With increased company formation at the seed and pre-seed stages, a Fervo-scale outcome need not be a generational event in Houston, but instead, it can become part of a chain reaction powering the city's economy.

---

Stephanie T. Schmidt, PhD, is the founder of a stealth startup, a Venture Fellow at Energy Transition Ventures, and an Executive MBA candidate at Rice University's Jones Graduate School of Business. Lawson Gow is the Chief Operating Officer of Greentown Labs. The full Houston VC landscape report is available at Energy Transition Ventures and CleanTech.Org.

Sources: Crunchbase, PitchBook-NVCA, Carta
View All Listings