Here are the most promising energy tech startups in the market today. Natalie Harms/InnovationMap

This week, 39 energy startup companies from all over the world pitched in Houston — and nine were recognized as being the most promising of the batch.

The Rice Alliance for Technology and Entrepreneurship returned its Offshore Technology Conference pitch event to its in-person capacity and host the annual event at the Ion Houston for the first time. The event featured three-minute pitches from the companies, and a select group of corporate and venture investors decided on the top nine to honor.

"We asked investors and corporates to look at the companies here today and help us determine the companies most promising — based on those that have an innovative technology that is solving a large problem, has customers willing to pay for it, and has the right team to build and grow their company," Brad Burke, managing director of the Rice Alliance says to the crowd at the event on May 3.

Here's which energy tech companies stood out to investors.

EarthEn

EarthEn, a Chandler, Arizona-based company, is a grid-scale energy storage solution. The technology can provide short-term — 6 to 8 hours — and long-term — over 100 hours — storage. The EarthEn pods provide a cheaper alternative and are built using 3D printing.

Echogen Power Systems

Based in Akron, Ohio, Echogen Power Systems has created a technology that captures heat that would otherwise be lost and converts it to a useable power source. The solution allows for any customer that operates at significant levels of heat to have a cost-effective energy option.

FuelX Innovation

Based in Aiken, South Carolina, FuelX Innovation is manufacturing solid-state hydrogen products and power systems, impacting mobile hydrogen fuel cell-powered applications. The company is focused on producing the lowest cost Alane, or aluminum hydride, for the fuel cell.

Lillianah Technologies

Lillianah Technologies, based in the Houston area in Spring, uses algae to remove carbon dioxide from the atmosphere. The company sells carbon offsets to corporations.

oPRO.ai

oPRO.ai — which is based in Los Altos, California — is providing its customers with deep learning optimization software for process and responsible operations for oil and gas, petrochemical, chemicals, and metal industries.

Proteum Energy

Phoenix, Arizona-based Proteum Energy provides its customers low-cost, clean hydrogen by reforming renewable ethanol into renewable hydrogen.

Sync Power Solutions

Embracing a clean sheet approach, Sync Power Solutions, based in Abilene, Texas, created a solution involving a redesign of electric motors and generators to increase energy efficiency, save on costs, and more.

Utility Global

Houston-based Utility Global is using high temperature electrolysis without the use of electricity to produce hydrogen from waste gases.

ZL Innovations

Based in Portland, Oregon, ZL Innovations is focused on eliminating greenhouse gas emissions from failed industrial valves. The company's solution is a magnetic actuation assembly that can be better sealed to prevent emissions.

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Houston investment firm names tech exec as new partner

new hire

Houston tech executive Robert Kester has joined Houston-based Veriten, an energy-focused research, investment and strategy firm, as technology and innovation partner.

Kester most recently served as chief technology officer for emissions solutions at Honeywell Process Solutions, where he worked for five years. Honeywell International acquired Houston-based oil and gas technology company Rebellion Photonics, where Kester was co-founder and CEO, in 2019.

Honeywell Process Solutions shares offices in Houston with the global headquarters of Honeywell Performance Materials and Technologies. Honeywell, a Fortune 100 conglomerate, employs more than 850 people in Houston.

“We are thrilled to welcome Robert to the Veriten team,” founder and CEO Maynard Holt said in a statement, “and are confident that his technical expertise and skills will make a big contribution to Veriten’s partner and investor community. He will [oversee] every aspect of what we do, with the use case for AI in energy high on the 2025 priority list.”

Kester earned a doctoral degree in bioengineering from Rice University, a master’s degree in optical sciences from the University of Arizona and a bachelor’s degree in laser optical engineering technology from the Oregon Institute of Technology. He holds 25 patents and has more than 25 patents pending.

Veriten celebrated its third anniversary on January 10, the day that the hiring of Kester was announced. The startup launched with seven employees.

“With the addition of Dr. Kester, we are a 26-person team and are as enthusiastic as ever about improving the energy dialogue and researching the future paths for energy,” Holt added.

Kester spoke on the Houston Innovators Podcast in 2021. Listen here

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SpaceX loses mega rocket in latest thrilling Starship test flight

Testing

SpaceX launched its Starship rocket on its latest test flight Thursday, but the spacecraft was destroyed following a thrilling booster catch back at the pad.

Elon Musk’s company said Starship broke apart — what it called a “rapid unscheduled disassembly." The spacecraft's six engines appeared to shut down one by one during ascent, with contact lost just 8 1/2 minutes into the flight.

The spacecraft — a new and upgraded model making its debut — was supposed to soar across the Gulf of Mexico from Texas on a near loop around the world similar to previous test flights. SpaceX had packed it with 10 dummy satellites for practice at releasing them.

A minute before the loss, SpaceX used the launch tower's giant mechanical arms to catch the returning booster, a feat achieved only once before. The descending booster hovered over the launch pad before being gripped by the pair of arms dubbed chopsticks.

The thrill of the catch quickly turned into disappointment for not only the company, but the crowds gathered along the southern tip of Texas.

“It was great to see a booster come down, but we are obviously bummed out about [the] ship,” said SpaceX spokesman Dan Huot. “It’s a flight test. It’s an experimental vehicle," he stressed.

The last data received from the spacecraft indicated an altitude of 90 miles and a velocity of 13,245 mph.

Musk said a preliminary analysis suggests leaking fuel may have built up pressure in a cavity above the engine firewall. Fire suppression will be added to the area, with increased venting and double-checking for leaks, he said via X.

The 400-foot rocket had thundered away in late afternoon from Boca Chica Beach near the Mexican border. The late hour ensured a daylight entry halfway around the world in the Indian Ocean. But the shiny retro-looking spacecraft never got nearly that far.

SpaceX had made improvements to the spacecraft for the latest demo and added a fleet of satellite mockups. The test satellites were the same size as SpaceX’s Starlink internet satellites and, like the spacecraft, were meant to be destroyed upon entry.

Musk plans to launch actual Starlinks on Starships before moving on to other satellites and, eventually, crews.

It was the seventh test flight for the world’s biggest and most powerful rocket. NASA has reserved a pair of Starships to land astronauts on the moon later this decade. Musk’s goal is Mars.

Hours earlier in Florida, another billionaire’s rocket company — Jeff Bezos’ Blue Origin — launched the newest supersized rocket, New Glenn. The rocket reached orbit on its first flight, successfully placing an experimental satellite thousands of miles above Earth. But the first-stage booster was destroyed, missing its targeted landing on a floating platform in the Atlantic.