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California SAF co. raises $3M, plans to open Houston lab

Unifuel’s technology consists of a series of chemical reactions that convert various sustainable materials into sustainable aviation fuels. Photo via Unifuel

Armed with a fresh $3 million round of seed funding, Los Altos, California-based Universal Fuel Technologies is establishing a lab in Houston for production of sustainable aviation fuel samples.

TO VC led the round, with participation from Alchemist Accelerator, Claire Technologies, and World Star Aviation.

Unifuel’s Flexiforming technology consists of a series of chemical reactions that convert various sustainable materials — such as ethanol, methanol, and liquified petroleum gas — into high-quality SAF that’s similar in chemical composition to traditional jet fuel.

“Today’s SAF production is challenged by feedstock limitations and expense, which are problems Unifuel’s Flexiforming solves,” Joshua Phitoussi, managing partner at TO VC, says in a news release. “Unifuel has engineered a more efficient SAF production method that dramatically cuts costs while getting the most out of limited resources.”

One of the key benefits of Flexiforming is that it creates the molecules needed for jet engines and other aircraft equipment to run smoothly. The addition of Flexiforming’s SAF allows for a fully synthetic jet fuel that airlines would be able to use without blending with conventional jet fuel once ASTM International (formerly the American Society of Testing and Materials) approves 100% SAF.

“Sustainable aviation depends upon developing SAF that is not only cost-effective but able to work within the aviation industry as it stands today,” says Alexei Beltyukov, CEO of Universal Fuel Technologies. “With Flexiforming, we can give SAF producers the ability to make affordable, high-quality SAF that has the characteristics needed for aircraft performance and the flexibility to scale at their own rate.”

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A View From HETI

Amperon, Hertha Metals and Vaulted Deep were named to this year's Global Cleantech 100 list. Photo via Getty Images

Three Houston-area companies—Amperon, Hertha Metals and Vaulted Deep—appear on this year’s Global Cleantech 100 list.

The unranked list, generated by market intelligence and advisory firm Cleantech Group, identifies the 100 privately held companies around the world that are most likely to make a significant impact in the cleantech market over the next five to 10 years.

For the 2026 list, Cleantech Group received more than 24,000 Global Cleantech 100 nominations from nearly 60 countries. Cleantech Group scored those companies and narrowed the contenders to 264. An expert panel reviewed those nominees, and the list was whittled down to the 100 winners.

Here’s a rundown of the three Houston-area honorees:

Amperon

Founded in 2018 by Sean Kelly and Abe Stanway, Houston-based Amperon offers an AI-enabled energy forecasting and analytics platform designed to help stabilize electric grids. Amperon received undisclosed amounts of venture capital from National Grid Partners and Tokyo Gas Co. Ltd. last year and announced a recent investment from Samsung Ventures earlier this month.

Hertha Metals

Founded in 2022 by Laureen Meroueh, Conroe-based Hertha Metals provides a single-step process for producing sustainable steel. Last year, the company emerged from stealth mode and raised more than $17 million in venture capital.

Vaulted Deep

Vaulted Deep’s technology injects excess organic waste underground to remove carbon dioxide from the atmosphere. Julia Reichelstein and Omar Abou-Sayed founded the Houston-based company in 2023. Last year, the startup raised $32.3 million in venture capital. Also in 2025, Vaulted Deep signed a 12-year deal with software giant Microsoft to remove up to 4.9 million metric tons of carbon dioxide from the environment.

Vaulted Deep also made the list last year, along with Houston-based Syzygy Plasmonics and Fervo Energy. Fervo was also named the 2025 North American Company of the Year by Cleantech Group.

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