VC roundup: Here's what Houston startups raised funds last quarter

following the money

Here are the Houston startups that together raised over $222 million in venture capital investment last quarter. Photo via Getty Images

Houston startups are keeping pace when it comes to venture capital raised this year. In this roundup of funding closed in the second quarter, Houston businesses across sectors and industries close significant rounds from seed to series C.

Eleven startups raised over $222 million last quarter, according to InnovationMap reporting, which is more than in the first and second quarters. In chronological order, here's what companies snagged fresh funding recently.


Houston EV charging tech company raises $6M series A

Revterra Corp. closed a $6 million series A round led by Equinor Ventures. Photo courtesy of Revterra

Houston-based tech company Revterra Corp. has picked up $6 million in a series A funding round to propel development of its battery for electric vehicle charging stations.

Norway’s Equinor Ventures led the round, with participation from Houston-based SCF Ventures. Previously, Revterra raised nearly $500,000 through a combination of angel investments and a National Science Foundation grant.

Revterra says its kinetic flywheel battery enables quick, simple, cost-effective installation of high-powered DC chargers for electric vehicles. The technology eases the burden placed on electrical grids, the company says. Continue reading.

Houston-founded blockchain startup raises $15M series A to increase international impact

Topl's latest fundraising round includes participation from a Houston investor as well as international partners. Image via Getty Images

A blockchain technology company that was founded out of Rice University has closed its latest round of funding.

Founded in 2017, Topl is a blockchain-as-a-service company that's developing a purpose-built blockchain ecosystem to empower impact and sustainability within its userbase of businesses. The company's $15 million series A round was co-led by Houston-based Mercury, Republic Asia, and Malta-based Cryptology Asset Group.

“Topl’s blockchain was purpose built to power the next wave of supply chains and markets, that are more sustainable and inclusive,” says Chris Georgen, founder and managing director of Topl, in a news release. “Every decision we’ve made has been relentlessly focused on this problem and it’s exciting to see this approach yielding results with more than 30 different impact-forward use cases already live or approaching launch." Continue reading.

Houston-based gig economy startup raises $1.2M, launches beta platform

Madison Long, left, and Simone May co-founded Clutch to democratize side gig success on college campuses. Photo courtesy of Clutch

Two Houstonians on a mission to enable safe and equitable entrepreneurship on college campuses have launched a new beta platform and closed pre-seed funding.

Clutch, a digital marketplace startup founded by Simone May and Madison Long, closed its pre-seed round of funding at $1.2 million – led by Precursor Ventures and other partners such as Capital Factory and HearstLab. The investment from this round will support Clutch’s national open beta launch of its platform for brands and student creators nationwide and its continued investment in customer and product strategy.

“We are at this inflection point where marketing is changing,” May says in a press release. “We know that the next generation can clearly see that and I think a lot of marketing agencies are starting to catch on. We need to be prioritizing the next generation’s opinion because they are driving who is interested in what they buy. This upcoming generation does not want to be sold to and they don’t like inorganic, inauthentic advertisements. That’s why user generated content is so big, it feels authentic.” Continue reading.

Houston hydrogen startup closes $25M series B

This hydrogen company has fresh funding. Photo via utility.global

Utility Global, a Houston-based sustainable hydrogen company, has closed its series B round of funding to the tune of $25 million, Axios reports.

Houston-based private equity firm Ara Partners led the round. Other participating investors included: Samsung Ventures, NOVA, and Aramco.

Utility Global, founded in 2018, has developed a clean hydrogen solution. The proprietary tech — called the eXERO Technology Platform — includes a zero electricity process that converts sustainable waste streams into high-purity hydrogen. Additionally, the company developed its H2Gen Product Line that delivers customers reliable, low carbon, and high purity hydrogen, which offers unparalleled feedstock flexibility and highly competitive economics. Continue reading.

Industrial blockchain tech company headquartered in Houston closes $4M series C round

Houston-based Data Gumbo, an industrial blockchain-software-as-a-service company, announced that its latest round or funding. Photo courtesy of Data Gumbo

Data Gumbo, a Houston-based tech startup, has picked up $4 million in a series C round from the venture capital arms of foreign energy companies Saudi Aramco and Equinor.

The funding for Data Gumbo came from Saudi Aramco Energy Ventures, the VC subsidiary of government-owned oil and natural gas giant Saudi Aramco, and Equinor Technology Ventures, the VC subsidiary of Norwegian energy operator Equinor. The U.S. headquarters for both Saudi Aramco and Equinor are in Houston. Continue reading.

Houston company raises $138M for next-generation geothermal energy

The future of geothermal energy is here — and just got a big payday. Photo via Getty Images

Houston-based startup Fervo Energy has picked up $138 million in funding to propel its creation and operation of carbon-free power plants fueled by geothermal energy.

Fervos says the series C round will help it complete power plants in Nevada and Utah and evaluate new projects in California, Idaho, Oregon, Colorado, and New Mexico, as well as in other countries.

California-based investment firm DCVC led the round, with participation from six new investors. Continue reading.

Houston 'sneakerheads' raise $8.9M to further develop digital marketplace

Tradeblock's three co-founders have known each other since childhood. Photo via tradeblock.us

A Houston-based company is kicking it with some fresh funding with plans to expand development of its marketplace platform.

Unique sneaker trading platform, Tradeblock, has raised $8.9 million in funding from investment partners Courtside VC, Trinity Ventures, and Concrete Rose Capital. Per the news release, the company expects additional funding of around $4.5 million to its seed round.

Tradeblock — founded in 2020 by self-proclaimed "sneakerheads" and childhood friends Mbiyimoh Ghogomu, Tony Malveaux, and Darren Smith — will use the fresh funding to expand and improve its digital marketplace for shoes. Continue reading.

Health tech startup with Houston HQ raises $14M series A

Optellum, which has its United States operations based in the TMC Innovation Institute, has raised fresh funding. Photo via Getty Images

A Oxford-based health tech startup that has its United States headquarters in Houston has announced the close of its series A round of funding.

Optellum, which has created a breakthrough AI platform to diagnose and treat early-stage lung cancer, has raised $14 million in a series A funding round. The round was led by United Kingdom-based Mercia, with additional investors California-based Intuitive Ventures and New York-based Black Opal Ventures. Existing investors, including St John's College in the University of Oxford, IQ Capital, and the family office of Sir Martin & Lady Audrey Wood, also participated in the round, per a news release.

"Lung cancer is an urgent public health crisis and Optellum's groundbreaking approach utilizing AI to accelerate early detection and intervention may fundamentally alter the healthcare community's approach to combating this disease," says Dr. Oliver Keown, managing director of Intuitive Ventures, in the release. "Optellum is uniquely positioned to align and provide considerable value to patients, providers, and payers alike. Intuitive Ventures is thrilled to provide our full arsenal of financial and strategic support to Optellum as we work towards a world of better outcomes for cancer patients." Continue reading.

Houston-based biomaterials company raises $1.1M to grow team, build new HQ

BUCHA BIO has raised over $1 million to grow its team, build a new headquarters, and accelerate its go-to-market strategy. Image courtesy of BUCHA BIO

A Houston company that has created a plant-based material that can replace unsustainable conventional leathers and plastics has announced the close of its oversubscribed seed funding round.

BUCHA BIO announced it's raised $1.1 million in seed funding. The round included participation from existing partners New Climate Ventures, Lifely VC, and Beni VC, as well as from new partners Prithvi VC, Asymmetry VC, and investors from the Glasswall Syndicate, including Alwyn Capital, as well as Chris Zarou, CEO & Founder of Visionary Music Group and manager of multi-platinum Grammy-nominated rapper, Logic, the startup reports in a news release.

“I’m excited to back BUCHA BIO’s amazing early market traction," Zarou says in the release. "Their next-gen bio-based materials are game-changing, and their goals align with my personal vision for a more sustainable future within the entertainment industry and beyond.” Continue reading.

Houston-based Codenotary has expanded its series B fundraising round

Codenotary's software enables tools for notarization and verification of the software development life cycle. Photo via Getty Images

A Houston software startup that raised $12.5 million earlier this year has announced additional funding of $6 million. Codenotary, whose technology helps secure software supply chains, closed its series B round in January. The fresh funding brings the company's total investment raised to $24 million — thanks to investors Bluwat and Elaia.leaders and following a series A round that was announced in 2020.

Codenotary, formerly known as vChain, was founded in 2018 by CEO Moshe Bar and CTO Dennis Zimmer. The additional capital, which will go towards scaling up sales in the U.S. and Europe as well as entering the Asian market, was raised as an extension of the series B round. Continue reading.

Houston-based virtual reality startup raises $3.2M in first outside capital round

VR training startup, HTX Labs, has raised funding from an outside investor for the first time. Courtesy of HTX Labs

HTX Labs, a Houston-based company that designs extended reality training for military and business purposes, announced last week that it has raised its first outside capital.

The company has received a $3.2 million investment from Cypress Growth Capital. Founded in 2017, HTX Labs — developer of the EMPACT Immersive Learning Platform — has been granted funding from the Department of Defense as well as grown its client base of commercial Enterprises. The platform uses virtual and extended reality that "enables organizations to rapidly create, deploy, measure, and sustain cost-effective, secure, and centralized immersive training programs, all within engaging, fully interactive virtual environments," per a news release.

“We have been looking to secure outside capital to accelerate the growth of our EMPACT platform and customer base but we hadn’t found the right partner who provided an investment vehicle that matched our needs,“ says HTX Labs CEO Scott Schneider in the release. Continue reading.

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Houston lab-test startup seeks $1M for nationwide expansion

Testing Access

Health care industry veteran Jim Gebhart knew there had to be a better way for patients to access lab services, especially those with high health insurance deductibles or no insurance at all.

“This challenge became deeply personal when a close family member developed a serious illness, and we struggled to secure prompt appointments,” Gebhart tells InnovationMap. “It’s incredibly frustrating when a loved one cannot receive timely care simply because of provider shortages or the limited capacity of traditional clinics.”

Driven by the desire to knock down lab-test barriers, Gebhart founded Houston-based TheLabCafe.com in 2024. The platform provides access to low-cost medical tests without requiring patients to carry health insurance. TheLabCafe serves patients in six states: Texas, Georgia, Louisiana, Nevada, New Mexico and Oklahoma. Gebhart, the startup’s CEO, says that by the end of March, LabCafe will be offering services in 20 more states and the District of Columbia.

Gebhart has spent more than 30 years in the lab industry. His career includes stints at Austin-based Clinical Pathology Laboratories, Ohio’s Cleveland Clinic Laboratories and Secaucus, New Jersey-based Quest Diagnostics.

“Since nearly 80 percent of disease diagnoses rely on laboratory testing, I decided to leverage my background to create a more accessible, self-directed process for individuals to order blood and urine tests on their own terms — when and where they need them,” says Gebhart.

So far, Gebhart is self-funding the startup. But he plans to seek $700,000 to $1 million in outside investments in late 2026 to support the nationwide expansion and the introduction of more services.

TheLabCafe contracts with labs for an array of tests, such as cholesterol, hepatitis, metabolic, testosterone, thyroid and sexually transmitted infection (STI) tests. A cholesterol test obtained through TheLabCafe might cost $29, compared with a typical cost of perhaps $39 to $59 without insurance.

A health care professional reviews every test, both when the test is ordered and when the results are delivered, often within 24 hours. After receiving test results, a patient can schedule a virtual visit with a health care professional to go over the findings and learn potential treatment options.

Gebhart says TheLabCafe particularly benefits uninsured patients, including those in Texas. Among the states, Texas has the highest rate of uninsured residents. U.S. Census Bureau data shows 21.6 percent of adults and 13.6 percent of children in Texas lacked health insurance in 2024.

“Uninsured patients often pay the highest prices in the health care system,” Gebhart explains. “We address this by offering straightforward pricing and convenient access to testing without requiring insurance.”

“Our rates are intentionally set to remain affordable, helping individuals take a proactive approach to their health,” he adds. “Regular testing enables people to identify potential health issues early and track their progress as they make lifestyle changes. Ultimately, you can’t measure improvement without data — and laboratory results provide that data.”

Houston geothermal startup secures $97M Series B for next-gen power

fresh funding

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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This article originally appeared on our sister site, EnergyCapitalHTX.com.

10+ can't-miss Houston business and innovation events in February

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Editor's note: February may be short, but its event calendar isn’t. From recurring monthly favorites to the return of annual celebrations and summits, here's what not to miss and how to register. Please note: this article may be updated to include additional event listings.

Feb. 2 — Entrepreneurship Roundtable with OPEN

Join founders, builders and innovators as they explore what it takes to create, scale and sustain meaningful ventures. This event, hosted by Open Houston, will be moderated by Faisal Bhutto, president and CEO of Houston-based end-to-end IT and cybersecurity company Alykas.

This event is Monday, Feb. 2, from 11 a.m.-1 p.m. at the Ion. Register here.

Feb. 3 — Tech+Tequila Talk: Tax Equity: Aligning Incentives for Founders, Investors & Philanthropy

Hear from guest speaker Cesar de la Cerda, founder and CIO of EnvisionVest, at the latest installment of Tech and Tequila Talk. The event will focus on using the tax code as a powerful fundraising tool.

This event takes place Tuesday, Feb. 3, from 5-7 p.m. at the Ion. Register here.

Feb. 5 — Ion Block Party Mardi Gras

Let the good times roll while networking with potential collaborators, mentors and investors at the Ion. Food and drink will be available, and the Ion will provide drink tickets for one free drink at Second Draught upon check-in.

This event is Thursday, Feb. 5, from 4-7 p.m. at the Ion. Register here.

Feb. 10 — Mercury Fund Day at the Ion

The Ion and Houston's Mercury Fund will host this special event, previously known as Software Day. The event will feature a panel that dives into how Mercury is pushing the boundaries of what’s possible with agentic AI and blockchain. A select group of early-stage software startups will also participate in office hours before the panel. Afterwards, all attendees can network during happy hour at Second Draught.

This event is Tuesday, Feb. 10, from 3:30-7:30 p.m. Register here.

Feb. 11-12 – In-Space Physical AI Workshop

Rice Nexus is bringing together industry leaders, government agencies and academia to explore the cutting edge of AI in space exploration. Matt Ondler, president of Aegis Aerospace, will present the keynote address. Other industry leaders from NASA Johnson Space Center, Intuitive Machines, Microsoft and Rice University and other organizations will participate. The event will close with the Inaugural Space Galette Reception hosted by the Consulate General of France in Houston and the Rice Space Institute.

This event begins Wednesday, Feb. 11, at the Ion. Register here.

Feb. 12 — State of the City

Houston First Corporation and the Greater Houston Partnership will host Mayor John Whitmire’s State of the City luncheon. Whitmire will share an update on his administration’s progress since taking office and highlight his top priorities that will continue to elevate Houston and its economy.

This event is Thursday, Feb. 12, from 11 a.m.-1:30 p.m. at the Hilton Americas-Houston. Register here.

Feb. 12 — Positioning Houston as the Brain Capital of the World

David Gow, CEO of the Center for Houston's Future, will present "Positioning Houston as the Brain Capital of the World" at the University of Houston Honors College Leadership Forum. Gow will share how Project Metis aims to establish Houston as a global hub for brain health research, innovation and economic development.

This event is Thursday, Feb. 12, from 7:30-9:30 a.m. at The Junior League of Houston. Register here.

Feb. 13 — From Research to Enterprise: Immigration & Innovation

Innov8 Hub will host an in-person seminar as part of its Startup Resources Series, focused on the intersection of immigration law, entrepreneurship and technology commercialization. The session will feature guest speakers Mario Cantu, Shilpa Ghurye and Vikesh Patel of KM&D PLLC, who will share insights for founders and innovators navigating legal pathways while building and scaling technology-driven ventures.

The event is Friday, Feb. 13, from 1-2 p.m. at the Innovation Center at UH Technology Bridge, Building 4. Register here.

Feb. 18-20 — TMC AI Summit

UTHealth Houston and Texas Children’s Hospital are bringing back the TMC AI Summit for its third year. This event is focused on translating advanced AI innovations into practical, real-world solutions for the biomedical and healthcare industries. It will be broken up into three tracks and will feature poster and oral presentations, workshops and tutorials, industry talks and student research showcases.

The event begins Wednesday, Feb. 18, at the Duncan Neurological Research Institute. Register here.

Feb. 26 — Transition on Tap

Greentown Labs’ signature networking event returns in February to foster conversations and connections within Houston's climate and energy transition ecosystem. Entrepreneurs, investors, students, philanthropists and more are invited to attend, meet colleagues, discuss solutions and engage with the growing community.

The event begins Monday, Feb. 26, from 5:30-7:30 p.m. at Greentown Labs. Register here.

Feb. 26 — NASA Tech Talk

Every fourth Thursday of the month, NASA experts, including longtime engineer Montgomery Goforth, present on technology development challenges NASA’s Johnson Space Center and the larger aerospace community are facing, and how they can be leveraged by Houston’s innovation community. Stick around after for drinks and networking at Second Draught.

This event is Thursday, Feb. 26, from 6-7 p.m. at the Ion. Register here.

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