The Karimi siblings have created a way to synthetically convert CO2 into glucose, and they are targeting the energy and aerospace industries for their technology. Courtesy of Cemvita Factory

Houston-based Cemvita Factory is unlike most startups. Before even knowing what industry they were going to affect, Moji Karimi and his sister, Tara, established their company, which uses synthetic photosynthesis — the process of turning carbon dioxide into glucose for plants.

"In some ways, this company started with the solution, rather than the problem," Moji Karimi, co-founder of Cemvita, says. "Then we said, 'if we could replicate photosynthesis, what problems can we solve?'"

Once the technology was set in place, Karimi, who has a background in oil and gas drilling, says he identified the energy industry in need of something like this. He says he saw an increased pressure on large energy companies to adapt sustainable ways to get rid of the CO2 that is produced as a result of drilling.

More and more companies are investing in a process called carbon dioxide capturing — but it's expensive and not yet cost efficient for energy companies to commit to. But that's changing. Karimi says the process that once cost $600 per ton of CO2 now can be found as cheap as $30.

With his sister's technology, Karimi says they can take that captured carbon dioxide and turn it into other chemicals too. Each oil and gas company client can specify what they want to turn it into and, for less than $100,000, Cemvita will run a pilot program for them. Cemvita sells the exclusive rights to the technology, but still maintains its IP.

"We go to these companies and say, 'What do you want to convert CO2 into?,'" Karimi says. "Then, we do a quick pilot in six months in our lab, and we show them the metrics. They decide if they want to scale it up."

What seemed like another obvious industry for this process was aerospace. Many companies involved in aerospace exploration have Mars on the mind, and the planet's atmosphere is over 95 percent carbon dioxide. Plus, Cemvita can provide a more sustainable way to dispose of CO2 onboard spacecrafts. The current practice is essentially just discarding it by filtering it off the spaceship.

Putting a system in place
Cemvita was founded in August of 2017 and used 2018 to really establish itself. The company took second place at Dubai's Mohammed bin Rashid Space Centre Innovation Challenge and completed the accelerator program at Capital Factory.

Realizing the process is new and without the backing of an educational institution, Karimi says he and his sister needed a way to answer any questions and concerns, so Tara wrote a book. "Molecular Mechanisms of Autonomy in Biological Systems" is published by Springer.

Karimi also lead a talk at Tudor Pickering Holt's Energy Disruptor conference. His discussion, "From Mars to Midland," garnered a lot of interest from energy professionals.

The future is now
Karimi says 2019 is all about execution. He never thought he and his sister would overlap their industries, but now there's more of a need of interdisciplinary collaboration than ever before.

"There are a lot of opportunities bringing a proven science or technology from one industry into another to solve problems," he says.

The company has growth plans this year. The team has bootstrapped everything financially so far, but is looking for its first funding round in the middle of 2019. And, as far as the Karimi siblings are concerned, they are in the exact right place to grow.

"We're in Houston, and we have a technology that is from biotech and have applications in the space industry and the energy industry," Karimi says. "There would not have been any better place for us in the country than Houston."

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10 promising Houston startups that made headlines in 2025

year in review

Editor's note: As we reflect on 2025, we're looking back at the stories and startups that made waves in Houston's innovation scene. These 10 startups reached memorable milestones, won prestigious awards, found creative solutions, and disrupted their industries.

Persona AI: Houston humanoid robotics startup inks new deal to deploy its rugged robots

A concept design rendering of Persona AI's humanoid robot. The company is expanding at the Ion and plans to deliver prototype humanoids by the end of 2026 for complex shipyard welding tasks. Rendering courtesy Persona AI.

Persona AI is building modularized humanoid robots that aim to deliver continuous, round-the-clock productivity and skilled labor for "dull, dirty, dangerous, and declining" jobs. The company was founded by Houston entrepreneur Nicolaus Radford, who serves as CEO, along with CTO Jerry Pratt and COO Jide Akinyode. It raised $42 million in pre-seed funding this year and is developing its prototype of a robot-welder for Hyundai's shipbuilding division, which it plans to unveil in 2026. The company won in the Deep Tech Business category at this year's Houston Innovation Awards. Continue reading.

Rheom Materials: Houston startup unveils its innovative leather alternative at the rodeo

Rheom Materials presented its bio-based alternative, Shorai, a 93 percent bio-based leather, at the rodeo and plans to scale it up this year. Photos courtesy Rheom Materials

Rheom Materials presented its scalable, bio-based alternative known as Shorai, a 93 percent bio-based leather, through two custom, western-inspired outfits that showed off cowboy flair through a sustainable lens at the Houston Livestock Show and Rodeo earlier this year.

Next up, the company said it aimed to scale production of Shorai, the Japanese word for “future,” at a competitive price point, while also reducing its carbon footprint by 80 percent when compared to synthetic leather. The company also made a large-scale production partnership with a thermoplastic extrusion and lamination company, Bixby International, this year. Continue reading.

Koda Health: Houston digital health platform Koda closes $7 million funding round

Tatiana Fofanova and Dr. Desh Mohan, founders of Koda Health, which recently closed a $7 million series A. Photo courtesy Koda Health.

Houston-based digital advance care planning company Koda Health closed an oversubscribed $7 million series A funding round this year. The round, led by Evidenced, with participation from Mudita Venture Partners, Techstars and Texas Medical Center, will allow the company to scale operations and expand engineering, clinical strategy and customer success. Koda Health, saw major growth this year by integrating its end-of-life care planning platform with Dallas-based Guidehealth in April and with Epic Systems in July. The company won the Health Tech Business category at the 2025 Houston Innovation Awards. Continue reading.

Veloci Running: Student-led startup runs away with prestigious prize at Rice competition

The H. Albert Napier Rice Launch Challenge awarded $100,000 in equity-free funding to student-led startups, including first-place finisher Veloci Running. Photo courtesy of Rice University.

Veloci Running took home the first-place prize and $50,000 at the annual Liu Idea Lab for Innovation and Entrepreneurship's H. Albert Napier Rice Launch Challenge. The company was founded by Tyler Strothman, a former track and field athlete and senior at Rice, majoring in sport management. Inspired by the foot pain he suffered due to the narrow toe boxes in his running shoes, Strothman decided to create a naturally shaped shoe designed to relieve lower leg tightness and absorb impact. Additional prize winners included SteerBio, Kinnections, Labshare and several others. Continue reading.

Square Robot Inc.: Houston robotics co. unveils new robot that can handle extreme temperatures

The new robot eliminates the need for humans to enter dangerous and toxic environments. Photo courtesy of Square Robot

Houston- and Boston-based Square Robot Inc.'s newest tank inspection robot became commercially available and certified to operate at extreme temperatures this fall. The new robot, known as the SR-3HT, can operate from 14°F to 131°F, representing a broader temperature range than previous models in the company's portfolio. According to the company, its previous temperature range reached 32°F to 104°F. The company also announced a partnership with downstream and midstream energy giant Marathon Petroleum Corp. (NYSE: MPC) last month. Continue reading.

Bot Auto: Houston autonomous trucking co. completes first test run without human intervention

Bot Auto completed its first test run without human assistance in Houston. Photo courtesy Bot Auto.

Houston-based Bot Auto, an autonomous trucking company, completed its first test run without human assistance earlier this year. Bot Auto conducted the test in Houston. The transportation-as-a-service startup added that this milestone “serves as a validation benchmark, demonstrating the maturity and safety of Bot Auto’s autonomy stack and test protocols.” This summer, founder Xiaodi Hou told the Front Lines podcast that Bot Auto had raised more than $45 million. Continue reading.

Nomad: Screen-free hiking app developed in Houston earns 'Best of the Best' award

NOMAD aims to help hikers stay in the moment while still utilizing technology. Photo courtesy UH.

An AI-powered, screen-free hiking system developed by Varshini Chouthri, a recent industrial design graduate from the University of Houston, received this year's Red Dot’s “Best of the Best” award, which recognizes the top innovative designs around the world. Known as NOMAD, the system aims to help users stay in the moment while still utilizing technology. Continue reading.

Little Place Labs, Helix Earth, Tempest Droneworx: Houston startups win big at SXSW 2025 pitch competition

Two Houston startups won the SXSW Pitch showcase in their respective categories. Photo via Getty Images

Houston had a strong showing at the SXSW Pitch showcase in Austin this year, with several local startups claiming top prizes in their respective categories.

Little Place Labs, a Houston space data startup, won the Security, GovTech & Space competition. Clean-tech company Helix Earth, which spun out of Rice University and was incubated at Greentown Labs, won in the Smart Cities, Transportation & Sustainability contest. Tempest Droneworx, a Houston-based company that provides real-time intelligence collected through drones, robots and sensors, won the Best Speed Pitch award. Continue reading.

6 Houstonians named to prestigious national group of inventors

top honor

Six Houston scientists and innovation leaders have been named to the National Academy of Inventors’ newest class of fellows. The award is the highest professional distinction awarded to academic inventors by the NAI.

The 2025 class is made up of 169 fellows who hold more than 5,300 U.S. patents, according to the organization. The group hails from 127 institutions across 40 U.S. states.

The Houston-based inventors are leading fields from AI to chemistry to cancer research.

“NAI Fellows are a driving force within the innovation ecosystem, and their contributions across scientific disciplines are shaping the future of our world,” Paul R. Sanberg, president of the National Academy of Inventors, said in a news release. “We are thrilled to welcome this year’s class of Fellows to the Academy. They are truly an impressive cohort, and we look forward to honoring them at our 15th Annual Conference in Los Angeles next year.”

The 2025 list of Houston-based fellows includes:

  • Vineet Gupta, Vice President for Innovation, Technology Development and Transfer at the University of Texas Medical Branch
  • Eva Harth, chemistry professor at the University of Houston
  • Dr. Raghu Kalluri, Professor and Chairman of the Department of Cancer Biology at The University of Texas MD Anderson Cancer Center
  • Sanjoy Paul, Executive Director of Rice Nexus and AI Houston and Associate Vice President for Technology Development at Rice University
  • Dr. Jochen Reiser, President of the University of Texas Medical Branch and CEO of UTMB Health System
  • Todd Rosengart, Professor and Chair of the Department of Surgery at Baylor College of Medicine

"It is a great honor to be named a Fellow of the NAI. It is deeply gratifying to know that the work my students and I do — the daily push, often in small steps — is seen and recognized," Harth added in a news release from UH.

The 2025 fellows will be honored and presented with their medals by a senior official of the United States Patent and Trademark Office at the NAI Annual Conference this summer in Los Angeles.