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.

The new Solugen facility is expected to reduce annual carbon emissions by up to 18 million kilograms. Photo courtesy of Solugen

Houston-based sustainable chemical manufacturing secures $213.6M to support new facility

scaling up

Houston-based Solugen has secured financing from the U.S. Department of Energy's Loan Programs Office to support its mission of producing clean chemicals.

The LPO's $213.6 million loan guarantee will go toward the construction of the company's 500,000-square-foot Bioforge Marshall facility in Southwest Minnesota, which broke ground in April and will produce bio-based chemical products to be used in wastewater treatment, construction, agriculture, and the energy sector. According to Solugen, the facility is expected to reduce annual carbon emissions by up to 18 million kilograms.

"American manufacturing is at a turning point, and we are proud to have the opportunity to work with the DOE in bringing critical chemical production capabilities onshore to communities like Marshall," Gaurab Chakrabarti, CEO of Solugen, says in a news release. "By scaling cutting-edge technologies, we are meeting domestic demand for innovative solutions and setting global standards for sustainable biomanufacturing."

The new facility, originally announced last year, is expected to go online in the fall of 2025 and will create up to 100 temporary construction jobs as well as 56 full-time manufacturing jobs once the facility is up and running.

"Today’s announcement reflects President Biden’s commitment to building a thriving bioeconomy that benefits all Americans and ensures the United States leads the world in emerging biomass industries," the DOE writes in its announcement.

Bioforge Marshall is a scaled-up version of the company's first project, Bioforge Houston, which has been operating since 2021 and will continue to act as Solugen's research and development and innovation center.

"Scaling our Bioforge platform is not only a technological advancement, but a strategic move to fortify the domestic supply chain for critical chemicals," adds Sean Hunt, CTO of Solugen. "This project will serve as a model for how innovative technologies can revive American industries and maintain our competitive edge on a global scale."

Solugen will be required to meet certain DOE standards to move forward with the financing. Additionally, the company has created partnerships with regional educational and workforce development organizations for training and recruiting.

Founded in 2016, the Houston company has raised over $600 million, per Crunchbase, and clinched unicorn status with a $1 billion valuation in 2021. Last month, Solugen ranked at No. 36 on CNBC’s annual Disruptor 50 list, and in 2023, Chakrabarti and Hunt were named winners at the EY Entrepreneur of the Year awards.

Solugen claims a spot on CNBC’s annual Disruptor 50 list, which highlights private companies that are “upending the classic definition of disruption.” Photo via Getty Images

Houston-based cleantech unicorn named among annual top disruptors

on the rise

Houston-based biotech startup Solugen is making waves among innovative companies.

Solugen appears at No. 36 on CNBC’s annual Disruptor 50 list, which highlights private companies that are “upending the classic definition of disruption.” Privately owned startups founded after January 1, 2009, were eligible for the Disruptor 50 list.

Founded in 2016, Solugen replaces petroleum-based products with plant-derived substitutes through its Bioforge manufacturing platform. For example, it uses engineered enzymes and metal catalysts to convert feedstocks like sugar into chemicals that have traditionally been made from fossil fuels, such as petroleum and natural gas.

Solugen has raised $643 million in funding and now boasts a valuation of $2.2 billion.

“Sparked by a chance medical school poker game conversation in 2016, Solugen evolved from prototype to physical asset in five years, and production hit commercial scale shortly thereafter,” says CNBC.

Solugen co-founders Gaurab Chakrabarti and Sean Hunt received the Entrepreneur of The Year 2023 National Award, presented by professional services giant EY.

“Solugen is a textbook startup launched by two partners with $10,000 in seed money that is revolutionizing the chemical refining industry. The innovation-driven company is tackling impactful, life-changing issues important to the planet,” Entrepreneur of The Year judges wrote.

In April 2024, Solugen broke ground on a Bioforge biomanufacturing plant in Marshall, Minnesota. The 500,000-square-foot, 34-acre facility arose through a Solugen partnership with ADM. Chicago-based ADM produces agricultural products, commodities, and ingredients. The plant is expected to open in the fall of 2025.

“Solugen’s … technology is a transformative force in sustainable chemical manufacturing,” says Hunt. “The new facility will significantly increase our existing capabilities, enabling us to expand the market share of low-carbon chemistries.”

This week's roundup of Houston innovators includes Andrew Chang of United Airlines Ventures, Omair Tariq of Cart.com, and Gaurab Chakrabarti and Sean Hunt of Solugen. Photos courtesy

4 Houston innovators to know this week

who's who

Editor's note: In this week's roundup of Houston innovators to know, I'm introducing you to four local innovators across industries — from aviation to biotech — recently making headlines in Houston innovation.


Andrew Chang, managing director of United Airlines Ventures

Andrew Chang, managing director of United Airlines Ventures, joins the Houston Innovators Podcast. Photo via LinkedIn

When it comes to the future of aviation — namely, making it more sustainable, a rising tide lifts all boats. Or, in this case, planes.

Andrew Chang, managing director of United Airlines Ventures, explains that working together is the key for advancing sustainable aviation fuel, or SAF. That's why United Airlines started the Sustainable Flight Fund, a $200 million initiative with support from industry leaders, including Air Canada, Boeing, GE Aerospace, JPMorgan Chase, Honeywell, Aramco Ventures, Bank of America, Hawaiian Airlines, JetBlue Ventures, and several others.

"We all recognize that we may compete in our core business, but with the importance of sustainable aviation fuel and given that it's an industry that doesn't exist — you can't compete for something that doesn't exist — let's collaborate and work together to explore technologies that can directly or indirectly support the commercialization and production of sustainable aviation fuel," he says on the Houston Innovators Podcast. Read more.

Omair Tariq, founder and CEO of Cart.com

Omair Tariq's Cart.com is coming home. Photo via Cart.com

While originally founded in Houston in 2020, Cart.com has called Austin home for the past two years. Now, the scaling software company is coming home.

Cart.com, a tech company providing commerce and logistical solutions for businesses, announced today that its corporate headquarters has returned to Houston amid its rapid growth.

“I couldn’t be happier to bring Cart.com back home to Houston as we continue to revolutionize how merchants sell and fulfill products to meet customers anywhere they are,” Cart.com Founder and CEO Omair Tariq says in a news release. “The idea for Cart.com was born in Houston and we’ve always maintained a strong local presence with the majority of our executive team and board based here. As our customer mix increasingly moves upmarket and our own needs evolve, I’m confident Houston has what we need as we look towards the next stage of Cart.com’s growth story.” Read more.

Gaurab Chakrabarti and Sean Hunt, co-founders of Solugen

Gaurab Chakrabarti and Sean Hunt were originally named regional winners in this year's competition this summer along with nine other Houston entrepreneurs. Photos via solugen.com

Houston’s Gaurab Chakrabarti and Sean Hunt, the founders of the transformative chemical manufacturing company Solugen, have been named EY’s US National Award winners for Entrepreneur of the Year.

Solugen, also recently named a finalist in the 2023 Houston Innovation Awards, is an environmentally friendly approach that relies on smaller chemical refineries that helps in reducing costs and transportation-related emissions. Some of their noted accomplishments includes innovations like the proprietary reactor, dubbed the Bioforge, which is a carbon-negative molecule factory and manufacturing process produces zero wastewater or emissions compared with traditional petrochemical refineries.The Bioforge uses a chemienzymatic process in converting plant-sourced substances into essential materials that can be used instead of fossil fuels.

Chakrabarti and Hunt were originally named regional winners in this year's competition this summer along with nine other Houston entrepreneurs. Read more.

Gaurab Chakrabarti and Sean Hunt were originally named regional winners in this year's competition this summer along with nine other Houston entrepreneurs. Photos via solugen.com

Houston founders named winners for 2023 Entrepreneur of the Year awards

winner, winner

Houston’s Gaurab Chakrabarti and Sean Hunt, the founders of the transformative chemical manufacturing company Solugen, have been named EY’s US National Award winners for Entrepreneur of the Year.

Solugen, also recently named a finalist in the 2023 Houston Innovation Awards, is an environmentally friendly approach that relies on smaller chemical refineries that helps in reducing costs and transportation-related emissions. Some of their noted accomplishments includes innovations like the proprietary reactor, dubbed the Bioforge, which is a carbon-negative molecule factory and manufacturing process produces zero wastewater or emissions compared with traditional petrochemical refineries.The Bioforge uses a chemienzymatic process in converting plant-sourced substances into essential materials that can be used instead of fossil fuels.

Chakrabarti and Hunt were originally named regional winners in this year's competition this summer along with nine other Houston entrepreneurs.

Founded in 2016 by Hunt and Gaurab Chakrabarti, Solugen has raised over $600 million from investors like Sasol that believe in the technology's potential. The company is valued at reportedly over $2 billion. Solugen is headquartered in Houston, not because it is the hometown of Chakrabarti, but for what Houston brings to the company.

“There’s no way our business could succeed in the Bay Area," Chakrabarti said in a 2023 interview at SXSW where he detailed the offers Hunt and he received to move the business out of state. “For our business, if you look at the density of chemical engineers, the density of our potential customers, and the density of people who know how to do enzyme engineering, Houston happened to be that perfect trifecta for us.”

Even though they are headquartered in Houston, Solugen recently secured plans to expand to the Midwest, as in November they announced its newest strategic partnership with sustainable solutions company ADM (NYSE:ADM) in Marshall, Minnesota. The partnership includes plans for Solugen to build a 500,000-square-foot biomanufacturing facility next to an existing ADM facility , with the two companies working together on producing biomaterials to replace fossil fuel products.

“The strategic partnership with ADM will allow Solugen to bring our chemienzymatic process to a commercial scale and meet existing customer demand for our high-performance, cost-competitive, sustainable products,” Chakrabarti said in a news release. “As one of the few scaled-up and de-risked biomanufacturing assets in the country, Solugen’s Bioforge platform is helping bolster domestic capabilities and supply chains that are critical in ensuring the U.S. reaches its ambitious climate targets.”

For Chakrabarti and Hunt, Solugen was born out of a 12-year friendship, and the journey began after a friendly card game. After an entrepreneurship contest at MIT, which earned them second place and a $10,000 prize, they invested the winnings to work on what would become Solugen, a proof-of-concept reactor with materials bought from a local home improvement store.

"We had a conviction that we were building something that could be impactful to the rest of the world,” Chakrabarti said at SXSW in 2023.

This week's roundup of Houston innovators includes Gaurab Chakrabarti of Solugen, Andy Grolnick of Graylog, and Stuart Corr of Pumps and Pipes. Photos courtesy

3 Houston innovators to know this week

who's who

Editor's note: In this week's roundup of Houston innovators to know, I'm introducing you to three local innovators across industries — from software to biotech — recently making headlines in Houston innovation.


Gaurab Chakrabarti, CEO and co-founder of Solugen

Solugen has announced two major partnerships. Photo via solugentech.com

Solugen had a busy week. The Houston-based company that makes sustainable chemicals announced two new partnerships.

Solugen and Sasol Chemicals, a business unit of Saslo Ltd., revealed that they are working together to explore commercialization of sustainably-made home and personal care products. Read more.

Later last week, Solugen announced that it has scored a partnership with ADM to build a biomanufacturing facility adjacent to an existing corn complex in Marshall, Minnesota. Read more.

Andy Grolnick, CEO of Graylog

Graylog, a Houston SaaS company, has new fuel to scale and develop its product. Photo via Graylog

A Houston software-as-a-service company has secured $39 million in financing and announced its latest upgrade to its platform.

Graylog, which has created an innovative platform for cybersecurity and IT operations, raised equity funding with participation from new investor Silver Lake Waterman and existing investors Piper Sandler Merchant Banking and Harbert Growth Partners leading the round.

“The growth we are seeing globally is a response to our team’s focus on innovation, a superior user experience, low total cost of ownership, and strong execution from our Go-To-Market and Customer Success teams,” Andy Grolnick, CEO of Graylog, says in a news release. “We expect this momentum to continue as Graylog expands its reach and raises its profile in the security market.” Read more.

Stuart Corr, executive director of Pumps & Pipes

A Houston expert shares reasons to swap screen time for extended reality. Photo via pumpsandpipes.org

Virtual and augmented reality are having a moment, as Stuart Corr, executive director of Pumps & Pipes, explains in a guest column for InnovationMap.

"The COVID-19 pandemic saw an unprecedented shift to even more screen time and interactions using remote video communication platforms," he writes. "It was also around this time that wireless virtual reality headsets were, for the first time ever, economically accessible to the consumer due to the large push of one multinational corporation. Fast forward to 2023, there are even more companies beginning to enter the market with new extended reality (XR) headsets (i.e. virtual, mixed, and augmented reality) that offer spatial computing – the ability for computers to blend into the physical worlds (amongst other things)." Read more.

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Houston residents rank economy as biggest problem, new Kinder survey shows

by the numbers

The region’s economy tops the list of concerns of Houston-area residents surveyed by Rice University’s Kinder Institute for Urban Research.

Respondents in the Kinder Houston Area Survey, which questioned nearly 9,000 residents of Harris, Fort Bend and Montgomery counties, cite the regional economy as the area’s “biggest problem.”

Shrinking confidence in job opportunities and growing household financial pressures fueled the grim economic outlook:

  • The share of residents rating job prospects as “good” or “excellent” fell by more than 25 percentage points, the sharpest single-year decline since the 1980s.
  • Seventy-nine percent of those earning less than $25,000 said they’d be unable to cover an unplanned $400 expense. That was up from 72 percent last year. In the $50,000-to-$99,999 category, the figure was 39 percent, up from 30 percent last year.
  • More than 20 percent of residents said their financial status was worse than it was 12 months earlier.

“These challenges were particularly notable among lower- and middle-earning households,” according to a report about the survey.

Dan Potter, co-director of the institute’s Houston Population Research Center, says the annual survey “provides community leaders and the public with a map of where we’ve been on key issues, where we are now, and what’s of looming importance. It allows everyone to work together toward a better future for our city and our region.”

Houston-based Oxy officially announces CEO transition, names successor

Team Transition

Houston-based Occidental (Oxy) has officially announced its longtime CEO's retirement and her successor.

Oxy shared that Vicki Hollub will retire June 1. Reuters first reported Hollub's plan to retire in March, but a firm date had not been set. Hollub will remain on Oxy's board of directors.

Richard Jackson, who currently serves as Oxy's COO, will replace Hollub in the CEO role.

“It has been a privilege to lead Occidental and work alongside such a talented team for more than 40 years," Hollub shared in a news release. "Following the recently completed decade-long transformation of the company, we now have the best portfolio and the best technical expertise in Occidental’s history. With this strong foundation in place, a clear path forward and a leader like Richard, who has the experience and vision to elevate Occidental, now is the right time for this transition. “I look forward to supporting Richard and the Board through my continued role as a director.”

Hollub has held the top leadership position at Oxy since 2016 and has been with the energy giant for more than 40 years. Before being named CEO, she served as COO and senior executive vice president at the company. She led strategic acquisitions of Anadarko Petroleum in 2019 and CrownRock in 2024, and was the first woman selected to lead a major U.S. oil and gas company.

Hollub also played a key role in leading Oxy's future as a "carbon management company."

Jackson has been with Oxy since 2003. He has held numerous leadership positions, including president of U.S. onshore oil and gas, president of low carbon integrated technologies, general manager of the Permian Delaware Basin and enhanced oil recovery oil and gas, vice president of investor relations, and vice president of drilling Americas.

He was instrumental in launching Oxy Low Carbon Ventures, which focuses DAC, carbon sequestration and low-carbon fuels through businesses like 1PointFive, TerraLithium and others, according to the company. He also serves on the Oil and Gas Climate Initiative’s Climate Investment Board and the American Petroleum Institute’s Upstream Committee. He holds a bachelor's degree in petroleum engineering from Texas A&M University.

Jackson was named COO of Oxy in October 2025. In his new role as CEO, he will also join the board of directors, effective June 1.

“I am grateful to be appointed President and CEO of Occidental and excited about the opportunity to execute from the strong position and capabilities that we built under Vicki’s leadership,” Jackson added in the release. “It means a lot to me personally to be a part of our Occidental team. I am committed to delivering value from our significant and high-quality resource base. We have a tremendous opportunity to focus on organic improvement and execution to deliver meaningful value for our employees, shareholders and partners.”

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This article first appeared on EnergyCapitalHTX.com.

Rice Brain Institute awards seed grants for dementia, Alzheimer’s research

brain trust

The recently established Rice Brain Institute awarded 12 seed grants last month to support research on dementia, Alzheimer’s disease, Parkinson’s disease and other neurological disorders.

The grants are part of the Rice DPRIT Seed Grant Program, which aims to help faculty members generate preliminary data, test and teams that would be supported under the Dementia Prevention and Research Institute of Texas.

The DPRIT was approved last year to provide $3 billion in state funding over a 10-year span for research on dementia prevention and other neurological conditions. It will be modeled after the Cancer Prevention and Research Institute of Texas (CPRIT), which has awarded nearly $4 billion in grants since 2008.

“DPRIT is a historic initiative with transformative impact potential and at Rice we are very well equipped to contribute to its mission and help make Texas a leader in brain health and innovation,” Behnaam Aazhang, a Rice professor of electrical and computer engineering and director of the Neuroengineering Initiative and the RBI, said in a news release.

The Rice DPRIT Seed Grant Program is supported by the RBI and the Educational and Research Initiative for Collaborative Health (ENRICH) office at Rice. Most of the funding came from Rice's Office of Research, with a contribution from Rice's Amyloid Mechanism and Disease Center, which also launched last year.

A number of the teams include collaborators from Houston's Texas Medical Center, including Baylor College of Medicine, University of Texas Medical Branch and the McGovern Medical School at UTHealth Houston.

The 12 teams are:

  • Keya Ghonasgi, assistant professor of mechanical engineering at Rice. Ghonasgi's research addresses the high risk of falls among people with different types of dementia and aims to develop a personalized, home-based fall-prevention approach using textile-integrated wearable sensors.
  • Luz Garcini, associate professor of psychological sciences at Rice, and Hannah Ballard, associate director of community and public health at the Kinder Institute for Urban Research at Rice. Garcini and Ballard's research looks at barriers and facilitators to early detection of Alzheimer’s disease in diverse, medically underserved urban communities and focuses on populations that experience late diagnosis, including Hispanic/Latino groups.
  • Lei Li, assistant professor of electrical and computer engineering at Rice, and Pablo Valdes, assistant professor of neurosurgery at UTMB. Li and Valdes' project develops a noninvasive, bedside imaging approach to monitor brain blood flow and oxygenation in patients recovering from stroke or brain surgery using photoacoustic imaging through a specialized transparent skull implant.
  • Cameron Glasscock, assistant professor of biosciences at Rice. Glasscock's project addresses repeat expansion disorders, such as Huntington’s disease and myotonic dystrophy, and focuses on stopping DNA instability before repeats reach a disease-causing threshold.
  • Raudel Avila, assistant professor of mechanical engineering at Rice. Avila's project focuses on everyday health factors such as nutrition, hydration and brain blood flow and how they influence brain aging long before symptoms of dementia appear.
  • Isaac Hilton, associate professor of bioengineering at Rice, and Laura Lavery, assistant professor of biosciences at Rice. Hilton and Lavery's project uses precise CRISPR-based gene regulation to target multiple genetic drivers of neuronal damage in Alzheimer’s.
  • Quanbing Mou, assistant professor of chemistry at Rice, and Qing-Long Miao, assistant professor of neurology at Baylor College of Medicine. Mou and Miao's project aims to develop a gene-regulation therapy for childhood absence epilepsy by restoring activity of the CACNA1A gene.
  • Momona Yamagami, assistant professor of electrical and computer engineering at Rice, and Christopher Fagundes, professor of psychological sciences at Rice. Yamagami and Fagundes' project addresses the physical and mental health challenges faced by spouses caring for partners with Alzheimer’s disease and related dementias and aims to develop algorithms to determine the optimal timing and frequency of supportive text messages.
  • Han Xiao, professor of chemistry at Rice. Xiao's project aims to improve the delivery of antibody therapies to the brain using a noninvasive, light-based approach that temporarily opens the blood–brain barrier.
  • Lan Luan, associate professor of electrical and computer engineering at Rice. Luan's project investigates how tiny blood-vessel injuries in the brain, known as microinfarcts, contribute to dementia.
  • Natasha Kirienko, associate professor of biosciences at Rice. Kirienko's project targets a shared cause of neurodegeneration, impaired mitochondrial cleanup, and aims to identify an existing antidepressant that could be repurposed to protect neurons in diseases like Alzheimer’s and Parkinson’s.
  • Harini Iyer, assistant professor of biosciences at Rice. Iyer's project will observe zebrafish to investigate how the brain’s primary immune cells become improperly activated in neurological disorders, leading to the loss of healthy neurons and cognitive impairment.

The RBI also named the first four projects to receive research awards through the Rice and TMC Neuro Collaboration Seed Grant Program in January. Read more about those projects here.