Houston’s 10 most valuable startups revealed in new report

by the numbers

Houston's top startups by valuation range from e-commerce startups to a geothermal pioneer. Photo via Getty Images

The Greater Houston Partnership has released its list of the 10 most valuable startups that are fueling the city’s growth and entrepreneurial energy, including industry giants like Axiom Space and Fervo Energy.

Currently, Houston hosts more than 1,300 startups in industries such as energy, life sciences, manufacturing and aerospace, according to the GHP. The list ranks its top 10 startups by valuation based on the company’s last private funding round, reflected in Pitchbook data, as of Oct. 20 of this year.

The top 10 list includes:

10. NXTClean Fuels

Valuation: $530 million

NXTClean Fuels builds biofuel refineries that produce renewable fuel by using feedstocks like cooking oil and recycled organic materials.

9. Homebase

Valuation: $660 million

HR tech company Homebase provides employee management software that helps manage and optimize timesheets, payroll and more, with over over 100,000 small businesses and 2 million hourly workers using its product.

8. Zolve

Valuation: $800 million

Zolve is a banking platform that provides customers with access to financial products that aim to be accessible, flexible, and affordable than other financial platforms.

7. Stramsen Biotech

Valuation: $807 million

Stramsen Biotech develops plant-based drug therapies that target both infectious and noninfectious diseases, which include cancer, diabetes, HIV, kidney disease and neurological issues.

6. Octagos

Valuation: $843 million

Healthtech company Octagos has developed a remote cardiac monitoring software driven by AI that helps consolidate patient data in real-time, assisting healthcare professionals in providing quicker, easier and more accurate care.

5. Fervo Energy

Valuation: $1.4 billion

Pioneering geothermal company Fervo Energy combines horizontal drilling and fiber-optic sensing to produce electricity. The company is developing its flagship Cape Station geothermal power project in Utah. The first phase of the project will supply 100 megawatts of power beginning in 2026

4.Cart.com

Valuation: $1.7 billion

Cart.com is an e-commerce giant and logistics solutions provider that was founded in 2020 and obtained unicorn status within just three years.

3. Axiom Space

Valuation: $2.1 billion

Axiom Space is one of the anchor tenants at the Houston Spaceport, and has completed four missions of sending commercial astronauts to the ISS since 2022. In 2027, the company expects to see the first section of its private space station, Axiom Station, launched into low-earth orbit.

2. Solugen

Valuation: $2.175 billion

Solugen replaces petroleum-based products with plant-derived substitutes through its Bioforge manufacturing platform.

1. HighRadius

Valuation: $3.2 billion

HighRadius uses advanced technology to automate and manage accounts receivable processes for businesses worldwide.

The GHP also released its State of Houston’s Tech and Innovation Landscape, which mapped Houston’s digital and innovation sectors. Read the full report here.

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Axiom Space has named the latest partner to help develop its commercial space station. Image via NASA

Axiom Space taps solar array developer for first space station module

space contract

Houston-based Axiom Space is making progress on developing its commercial space station.

The company awarded Florida-based Redwire Corporation a contract to develop and deliver roll-out solar array (ROSA) wings to power the Axiom Payload Power Thermal Module (AxPPTM), which will be the first module for the new space station.

AxPPTM will initially attach to the International Space Station. AxPPTM will later separate from the ISS and rendezvous with Axiom’s Habitat 1 (AxH1) on orbit. Eventually, an airlock, Habitat 2 (AxH2) and finally the Research and Manufacturing Facility (AxRMF) will be added to the first two Axiom modules.

AxPPTM is anticipated to launch toward the end of 2027. The two-module station (AxPPTM and AxH1) is expected to be operational as a free-flying station by 2028, and the full four-module station around 2030.

The modules will be integrated and assembled at Axiom Space’s Assembly and Integration facility, making them the first human-rated spacecraft built in Houston.

Redwire’s ROSA technology was originally developed for the ISS, according to Space News. It has yielded a 100 percent success rate on on-orbit performance. The technology has also been used on NASA’s Double Asteroid Redirection Test mission, the Maxar-built Power and Propulsion Element for the Artemis Lunar Gateway and Thales Alenia Space’s Space Inspire satellites.

“As a market leader for space power solutions, Redwire is proud to be selected as a strategic supplier to deliver ROSAs for Axiom Space’s first space station module,” Mike Gold, Redwire president of civil and international space, said in a news release. “As NASA and industry take the next steps to build out commercial space stations to maintain U.S. leadership in low-Earth orbit, Redwire continues to be the partner of choice, enabling critical capabilities to ensure on-orbit success.”

Axiom Space has named Jonathan Cirtain as its new CEO. Photo via axiomspace.com.

Axiom Space announces new CEO amid strategic leadership change

new leader

Six months after promoting Tejpaul Bhatia from chief revenue officer to CEO, commercial space infrastructure and human spaceflight services provider Axiom Space has replaced him.

On Oct. 15, Houston-based Axiom announced Jonathan Cirtain has succeeded Bhatia as CEO. Bhatia joined Axiom in 2021. Cirtain remains the company’s president, a role he assumed in June, according to his LinkedIn profile.

In a news release, Axiom said Cirtain’s appointment as CEO is a “strategic leadership change” aimed at advancing the company’s development of space infrastructure.

Axiom hired Cirtain as president in June, according to his LinkedIn profile. The company didn’t publicly announce that move.

Kam Ghaffarian, co-founder and executive chairman of Axiom, said Cirtain’s “proven track record of leadership and commitment to excellence align perfectly with our mission of building era-defining space infrastructure that will drive exploration and fuel the global space economy.”

Aside from praising Cirtain, Ghaffarian expressed his “sincere gratitude” for Bhatia’s work at Axiom, including his leadership as CEO during “a significant transition period.”

Bhatia was promoted to CEO in April after helping Axiom gain more than $1 billion in contracts, Space News reported. He succeeded Ghaffarian as CEO. Axiom didn’t indicate whether Bhatia quit or was terminated.

Cirtain, an astrophysicist, was a senior executive at BWX Technologies, a supplier of nuclear components and fuel, for eight years before joining Axiom. Earlier, Cirtain spent nearly nine years in various roles at NASA’s Marshall Space Flight Center in Huntsville, Alabama. He previously co-founded a machine learning company specializing in Earth observation.

“Axiom Space is pioneering the commercialization of low-Earth orbit infrastructure while accelerating advancements in human spaceflight technologies,” Cirtain said. “I look forward to continuing our team’s important work of driving innovation to support expanded access to space and off-planet capabilities that will underpin the future of space exploration.”

Among other projects, Axiom is developing the world’s first commercial space station, creating next-generation spacesuits for astronauts and sending astronauts on low-Earth orbit missions.

Axiom Space chief astronaut Michael López-Alegría (left) trains with Axiom’s new “Project Astronaut,” Emiliano Ventura. Photo courtesy of Axiom Space.

Axiom Space launches semiconductor and astronaut training initiatives

space projects

Axiom Space, a Houston-based commercial spaceflight and space infrastructure company, has launched initiatives in two very different spheres — semiconductors and astronaut training.

On the semiconductor front, Axiom has signed a memorandum of understanding with Japanese chemical company Resonac Corp. to collaborate on semiconductor R&D and manufacturing projects carried out in space. Among Resonac’s products are materials used in chip manufacturing.

Axiom said the deal “paves the way toward leveraging microgravity to advance next-generation chip technologies and accelerate the in-space manufacturing market.”

Under the agreement, Axiom and Resonac will explore the potential production of semiconductor materials and chip packaging in microgravity and low-Earth-orbit environments.

“The unique environment of space offers immense potential for advancing semiconductor materials, especially in crystal growth,” Masato Fukushima, Resonac’s chief technology officer, said in a news release.

The deal will also extend Resonac’s work with Axiom on the development of molding compounds that can reduce “soft errors” when semiconductor devices are exposed to space radiation.

“Our collaboration with Resonac underscores how Axiom Space is enabling global corporations from around the world to leverage space to drive manufacturing innovation across critical technology sectors such as semiconductors,” Axiom astronaut Koichi Wakata, the company’s chief technology officer, said.

In the astronaut training arena, Axiom has tapped Portuguese physiologist Emiliano Ventura as its first “Project Astronaut.” Ventura will apply his expertise in human performance to a pilot program aimed at testing six-month astronaut training protocols.

“His goal is to participate in a future mission and explore, with scientific depth and curiosity, how the human body adapts to microgravity, contributing fresh insights to the current body of research in space physiology,” Axiom said.

Ventura has helped several Axiom crewmembers with physiological needs before and after missions aboard the International Space Station.

Axiom said Ventura’s pilot program will study astronauts’ physiological responses to microgravity during spaceflight. The program eventually will benefit Axiom astronauts heading to the world’s first commercial space station, which is being built by Axiom.

Michael López-Alegria, Axiom’s chief astronaut, said he and the company’s two other astronauts will train with Ventura. The Project Astronaut initiative “strengthens our commitment to enabling safe, effective, and inspiring commercial space missions while supporting scientific objectives worldwide.” López-Alegria said.
NASA has awarded KBR a five-year, $2.5 billion Human Health and Performance Contract. Photo courtesy NASA.

Houston company awarded $2.5B NASA contract to support astronaut health and space missions

space health

Houston-based technology and energy solution company KBR has been awarded a $2.5 billion NASA contract to support astronaut health and reduce risks during spaceflight missions.

Under the terms of the Human Health and Performance Contract 2, KBR will provide support services for several programs, including the Human Research Program, International Space Station Program, Commercial Crew Program, Artemis campaign and others. This will include ensuring crew health, safety, and performance; occupational health services and risk mitigation research for future flights.

“This contract reinforces KBR’s leadership in human spaceflight operations and highlights our expertise in supporting NASA’s vision for space exploration,” Mark Kavanaugh, KBR president of defense, intel and space, said in a news release.

The five-year contract will begin Nov. 1 with possible extension option periods that could last through 2035. The total estimated value of the base period plus the optional periods is $3.6 billion, and the majority of the work will be done at NASA’s Johnson Space Center.

“We’re proud to support NASA’s critical work on long-duration space travel, including the Artemis missions, while contributing to solutions that will help humans live and thrive beyond Earth,” Kavanaugh adde in the news release.

Recently, KBR and Axiom Space completed three successful crewed underwater tests of the Axiom Extravehicular Mobility Unit (AxEMU) at NASA's Neutral Buoyancy Laboratory (NBL) at Johnson Space Center. The tests were part of an effort to help both companies work to support NASA's return to the Moon, according to a release.

KBR also landed at No. 3 in a list of Texas businesses on Time and Statista’s new ranking of the country’s best midsize companies.

Houston-based METECS and two local subcontractors will develop simulation and software services for NASA space vehicle models, robotics and more. Photo via metecs.com.

Houston space companies land $150M NASA contract for vehicles and robots

space simulations

Houston-based MacLean Engineering and Applied Technology Services LLC, known as METECS, has received a five-year contract from NASA to develop simulations and software services for space-based vehicles and robots, with a maximum value of $150 million.

Two other Houston-area companies, Tietronix Software Inc. and Vedo Systems LLC, were assigned as subcontractors for the award.

"This award is a strong testament to NASA’s continued trust in the quality of our work and their confidence in our ongoing support of the human spaceflight program," John MacLean, president of METECS said in a release.

According to NASA, the awardees are tasked with providing:

  • Simulation and software services for space-based vehicle models and robotic manipulator systems
  • Human biomechanical representations for analysis and development of countermeasure devices
  • Guidance, navigation, and control of space-based vehicles for all flight phases
  • Space-based vehicle on-board computer systems simulations of flight software systems
  • Astronomical object surface interaction simulation of space-based vehicles
  • Graphics support for simulation visualization and engineering analysis
  • Ground-based and onboarding systems to support human-in-the-loop training

The contract is called Simulations and Advanced Software Services II (SASS II), and begins in October. This is the second time METECS has received the SASS award. The first also ran for five years and launched in 2020, according to USASpending.gov.

METECS specializes in simulation, software, robotics and systems analysis. It has previously supported NASA programs, including Orion, EHP, HLS, Lunar Gateway and Artemis. It also serves the energy, agriculture, education and construction sectors.

Tietronix Software has won numerous awards from NASA. Most recently, it won the NASA JSC Exceptional Software Award (2017). Some of its other customers include Houston Independent School District, Baylor College of Medicine, DARPA and Houston Methodist.

Video Systems offers software for implementing human-rated, AI and autonomous systems, as well as engineering services to address the needs of spaceflight and defense. The company has previously worked with NASA and METECS, as well as Axiom Space and defense contractor Lockheed Martin.

The three companies are headquartered near NASA’s Johnson Space Center in Houston.

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This Houston airport saw sharp passenger decline in 2025, study shows

Travel Talk

A new global airport travel study has revealed passenger traffic at Houston's William P. Hobby Airport (HOU) sharply decreased from 2024 to 2025.

The analysis from travel magazine LocalsInsider examined recently released data from the Bureau of Transportation Statistics (BTS), the U.S. International Trade Association, and a nationwide survey to determine the following American traveler habits: The most popular U.S. and international destinations, emerging hotspots, and destinations on the decline. The study covered passenger travel trends from January through July 2025.

In the report's ranking of the 40 U.S. airports with the sharpest declines in passenger traffic, HOU ranked 13th on the list.

About 4.26 million arrivals were reported at HOU from January through July 2024, compared to about 3.96 million during the same seven-month period in 2025. According to the data, that's a significant 7.1 percent drop in passenger traffic year-over-year, or a loss of 300,974 passengers.

"As travelers chase new hotspots, some destinations are seeing reduced passenger traffic whether due to rising costs, shifting airline schedules, or evolving traveler preferences, some destinations are seeing a decrease in visitors," the report's author wrote.

It appears most major Texas airports had drops in passenger traffic from 2024 to 2025. Dallas Love Field Airport (DAL) saw the worst in the state, with a dramatic 7.4 percent dip in arrivals. DAL also ranked 11th on the list of U.S. airports with the steepest declines in passenger traffic.

More than 5.13 million arrivals were reported at DAL from January through July 2024, compared to over 4.75 million during the same seven-month period in 2025.

This is how passenger traffic has fallen at other major Texas airports from 2024 to 2025:

Austin-Bergstrom International Airport (AUS):

  • 6,107,597 – Passenger arrivals from January to July 2024
  • 5,828,396 – Passenger arrivals from January to July 2025
  • -4.6 percent – Year-over-year passenger change
Dallas/Fort Worth International Airport (DFW):
  • 23,830,017 – Passenger arrivals from January to July 2024
  • 23,251,302 – Passenger arrivals from January to July 2025
  • -2.4 percent – Year-over-year passenger change

San Antonio International Airport (SAT):

  • 2,937,870 – Passenger arrivals from January to July 2024
  • 2,836,774 – Passenger arrivals from January to July 2025
  • -3.4 percent – Year-over-year passenger change
El Paso International Airport (ELP):
  • 1,094,431 – Passenger arrivals from January to July 2024
  • 1,076,845 – Passenger arrivals from January to July 2025
  • -1.6 percent – Year-over-year passenger change
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This story originally appeared on CultureMap.com.

NASA names new chief astronaut based in Houston

new hire

NASA has a new chief astronaut. Scott Tingle, stationed at the space agency’s Johnson Space Center in Houston, assumed the post Nov. 10.

Tingle succeeds NASA astronaut Joe Acaba, who had been chief astronaut since February 2023. Acaba now works on the staff of the Johnson Space Center’s director.

As chief astronaut, Tingle runs NASA’s Astronaut Office. His job includes developing astronauts’ flight crew operations and assigning crews for space missions, such as Artemis missions to the moon.

Tingle, a former captain in the Navy, was named a NASA astronaut candidate in 2009. He has logged over 4,500 flight hours in more than 50 aircraft.

Tingle was a flight engineer aboard the International Space Station, where he spent 168 days in orbit during two expeditions that launched in December 2017. Since returning to Earth, he has held various roles in the Astronaut Office, including mission support, technical leadership and crew readiness.

Before joining NASA, Tingle worked in El Segundo, California, on the technical staff of The Aerospace Corp., a nonprofit that supports U.S. space programs.

Tingle recalls expressing his desire to be an astronaut when he was 10 years old. It took him four tries to be accepted by NASA as an astronaut candidate.

“The first time I figured it was kind of too early. The second application, they sent out some feelers, and that was about it. Put in my third application, and got a couple of calls, but it didn’t quite happen,” Tingle said in an article published on the website of Purdue University, his alma mater.

ExxonMobil officially pauses plans for $7B Baytown hydrogen plant

Change of Plans

As anticipated, Spring-based oil and gas giant ExxonMobil has officially paused plans to build a low-hydrogen plant in Baytown, Chairman and CEO Darren Woods told Reuters in late November.

“The suspension of the project, which had already experienced delays, reflects a wider slowdown in efforts by traditional oil and gas firms to transition to cleaner energy sources as many of the initiatives struggle to turn a profit,” Reuters reported.

Woods signaled during ExxonMobil’s second-quarter earnings call that the company was weighing whether it would move forward with the proposed $7 billion plant.

The Biden-era Inflation Reduction Act created a new 10-year incentive, the 45V tax credit, for production of clean hydrogen. But under President Trump’s "One Big Beautiful Bill Act," the window for starting construction of low-carbon hydrogen projects that qualify for the tax credit has narrowed. The Inflation Reduction Act mandated that construction start by 2033. But the Big Beautiful Bill switched the construction start time to early 2028.

“While our project can meet this timeline, we’re concerned about the development of a broader market, which is critical to transition from government incentives,” ExxonMobil Chairman and CEO Darren Woods said during the company’s second-quarter earnings call.

Woods had said ExxonMobil was figuring out whether a combination of the 45Q tax credit for carbon capture projects and the revised 45V tax credit would enable a broader market for low-carbon hydrogen.

“If we can’t see an eventual path to a market-driven business, we won’t move forward with the [Baytown] project,” Woods said.

“We knew that helping to establish a brand-new product and a brand-new market initially driven by government policy would not be easy or advance in a straight line,” he added.

ExxonMobil announced in 2022 that it would build the low-carbon hydrogen plant at its refining and petrochemical complex in Baytown. The company has said the plant is slated to go online in 2027 and 2028.

ExxonMobil had said the Baytown plant would produce up to 1 billion cubic feet of hydrogen per day made from natural gas, and capture and store more than 98 percent of the associated carbon dioxide. The plant would have been capable of storing as much as 10 million metric tons of CO2 per year.

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This article originally appeared on EnergyCapitalHTX.com; it was updated to include new information about the plant in December 2025.

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