Rice Alliance announces 4 most promising energy tech companies at OTC

rising stars

Another Offshore Technology Conference, another Venture Day hosted by the Rice Alliance for Technology and Entrepreneurship. Photo by Zukiman Mohamad/Pexels

Fourteen companies pitched at the Rice Alliance for Technology and Entrepreneurship's Energy Venture Day at the 2021 Offshore Technology Conference, and virtual attendees voted on the companies they think are the most promising.

The companies, which hailed from three countries, again pitched virtually. Last year's venture day was also hosted virtually. The event's judging panel usually names 10 of the most promising companies at the event, however, just like last year, Rice Alliance put the power into the people viewing the pitches online.

Here are the four most promising energy tech companies that pitched at the annual OTC event.

American Hydrogen

Image via amhydrogen.com

Based in Tulsa, Oklahoma, American Hydrogen offers a fully integrated, end-to-end implementation solutions for hydrogen generation, storage, and distribution facilities.

"With roots in traditional energy, the American Hydrogen management team consists of senior oil and gas professionals who have spend decades developing infrastructure in prominent energy hubs across the United States. Through this field experience our team can furnish reliable and proven execution for an emerging clean technology market," per the company's website.

Alabastron Technologies

Image via alabastron.net

Houston-based Alabastron Technologies has developed a sensor that can detect organic and inorganic deposition in pipelines before any actual deposits form.

"Our service is a real-time closed-loop sensing, measurement and control strategy that remotely monitors oil production and the tendency of flow-restricting-substances or depositions prior to actual deposition," reads the company's website.

Applied Bioplastics

Photo via Getty Images

Applied Bioplastics, based in Austin, is commercializing an alternative to plastic by combining it plant fiber — operating with a carbon footprint 30 percent smaller than traditional plastic.

"Our products reduce petroleum dependency, pollution, and habitat destruction. Through our supply chains, we support eco-friendly agriculture in developing countries," according to the website.

DataSeer

Photo via dataseer.digital

Houston-based DataSeer is a cloud-based software application uses artificial intelligence to automatically detect, label and extract information from engineering data. The technology improves its customer's quality control and quality assurance of data extraction at scale.

"DataSeer was built in close collaboration with users at some of the largest engineering firms in the world, who we are proud to call our customers," the website reads.

Greentown Labs has announced its inaugural batch of members for its new Houston location. Photo via greentownlabs.com

New-to-Houston cleantech incubator names inaugural members

to the lab

A Somerville, Massachusetts-based cleantech accelerator has announced the 16 startups that will be a part of its new Houston incubator program.

Greentown Labs named the companies in the cohort this week just a few weeks after announcing the location of its new lab and workspace. The 40,000-square-foot space is being renovated from a former grocery store and is expected to open next spring.

"These early-access members are innovating across the key greenhouse gas-emitting sectors—including electricity, manufacturing, buildings, and more—and their solutions are helping create a sustainable future for all," reads a blog post on the company's website.

Here are Greentown Houston's inaugural members:

  • Austin-based Applied Bioplastics is creating affordable plastic alternatives with plant matter to help reduce consumers' carbon footprint.
  • Black Mountain Metals, based in Fort Worth, is focused on nickel and copper mining for lithium-ion battery cathodes.
  • Carbon Free Technologies created a home battery system that can store electricity when rates are low.
  • ClearValue uses pure hydrogen and oxygen as a sustainable power system.
  • e^2: equitable energy is described as a "multi-brand cause-marketing platform" that connects consumers to sustainable energy solutions through promotion and incentivization.
  • Eclipse Solar Projects builds, owns, and operates solar projects across the country through new technology and battery storage operations.
  • Houston-based Ennuity Holdings allows users to have access to solar energy subscription service — even though they don't have access to installing panels themselves.
  • Excipicio Energy , based in Houston, is taking renewable energy offshore by integrating wind, wave, and more into a single floating platform.
  • Houston-based Quantum New Energy platform, EnerWisely, helps people and companies make smart energy choices "to maximize their monetary savings and reduce their environmental impacts."
  • Spring, Texas-based Renu Energy is creating sustainable change through waste recycling and community engagement, according to its website.
  • REVOLUTION Turbine Technologies, based in North Carolina, is working on a power generator that can be used in the offshore setting.
  • Houston-based Revterra is developing a long-duration energy storage solution.
  • Skylark, based in Houston, created a "broadband last-mile radio systems for internet service providers, with a focus on 40 million unserved Americans in rural markets."
  • Austin-based swytchX is working on a cloud-based SaaS solution that uses blockchain technology to optimize renewable energy delivery.
  • Houston-based Varea Energy, a software company, uses data to build business models focusing on eliminating barriers to green initiatives.
  • California-based Veloce Energy develops faster electric vehicle charging infrastructure.
Companies interested in joining the incubator should reach out to Greentown Labs online.

The 16 startups will move into the Greentown space when it opens in the spring. Image via greentownlabs.com

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Rice University breaks ground on new innovation hub, The Arc

breaking ground

Construction is officially underway on Rice University's The Arc in Houston’s Ion District.

The university broke ground on the 200,000-square-foot research, corporate innovation and office building on Nov. 4. The facility will share a plaza with the existing Ion building, fostering collaboration within the innovation space, according to Rice.

“The Arc will bring Rice’s extraordinary research and talent and Houston’s impactful innovation ecosystem into even closer connection with the industries and innovators working to solve some of the world’s most consequential challenges,” Rice President Reginald DesRoches said in an announcement. “That constant exchange of ideas and expertise will help move discoveries more rapidly from the laboratory to real-world impact.”

Construction is scheduled to be completed by Q2 2028. Rice Real Estate Co. is developing the project, and Rice University will occupy about 80,000 square feet in the building (about 40 percent). Preleasing has begun, with floor plans ranging from 28,000 to 31,000 square feet.

The Arc will feature conference and meeting spaces, an amenity lounge, fitness center, outdoor plazas, underground parking, and on-site retail and dining, according to the release.

It aims to host tenants focused on artificial intelligence and machine learning, data science, robotics, quantum science and engineering and energy, including Rice's new AI Foundry.

Rice says the AI Foundry will be a space where university experts and partners can support organizations with AI challenges. Rice recently committed to hiring 75 new AI-focused faculty and announced plans to launch a new Master of Artificial Intelligence (MAI) next fall.

“The AI Foundry is exactly the kind of collaboration the Arc is designed to enable,” Amy Dittmar, the Howard R. Hughes Provost and executive vice president for academic affairs at Rice, added in the release. “By bringing Rice researchers together with industry partners in a shared environment, we can accelerate the movement of ideas from research into practical applications while helping organizations build the capabilities they need to succeed as AI continues to evolve.

Developers of The Arc are targeting LEED Gold certification by incorporating smart building automation and energy-saving features into the project's design. Rice first announced the project in September 2025.

Rendering courtesy Bogza

Houston battery tech startup FlowCellutions acquired by Katy energy co.

M&A

Katy-based TerraFlow Energy, an energy storage and infrastructure company, has acquired Houston-based battery technology startup FlowCellutions. Financial terms weren’t disclosed.

FlowCellutions still operates under its established name, but with the tagline “A TerraFlow Energy Company.” Becca Segel, founder and CEO of FlowCellutions, now runs the business as its president.

FlowCellutions specializes in electrochemical sensing, diagnostics, analytics, and testing that offer insights into battery chemistry, charging capabilities, and system performance.

“FlowCellutions has always been focused on developing better ways to understand what is happening inside a flow battery and using that information to improve how these systems perform,” Segal said in a press release. “Joining TerraFlow gives us the opportunity to apply that work at a much larger scale while continuing to build the capabilities and expertise that make FlowCellutions unique.”

The FlowCellutions platform supports data centers and other heavy users of power. It’s designed to help reduce operating costs, prevent failures and costly downtime, and extend battery lifetime from about seven years to more than 30 years.

Segel founded the company in 2022. A member of Greentown Labs, the company raised more than $2 million in non-dilutive funding and received $1.5 million in National Science Foundation funding earlier this year.

FlowCellutions is one of five finalists in the Energy Transition Business category of InnovationMap’s 2026 Houston Innovation Awards.

“FlowCellutions brings a depth of scientific and technical expertise that fits naturally with where TerraFlow is going,” Jon Parrella, CEO of TerraFlow, said in the release.

“As we move from developing these systems to deploying them at commercial scale, understanding performance at a deeper level matters,” he said. “Bringing FlowCellutions into TerraFlow strengthens that capability and gives both teams more opportunity to advance the technology.”TerraFlow, founded in 2024, develops long-duration energy storage and power infrastructure for data centers, industrial facilities, utilities and other large power consumers.

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This article originally appeared on EnergyCapitalHTX.com.

3 fast-growing Houston scaleups named Innovation Awards finalists

meet the finalists

From IPOs to groundbreakings, some of Houston's most innovative companies reached major milestones this year.

As part of the 2026 Houston Innovation Awards, our Scaleup of the Year category honors innovative later-stage startups that have recently reached a significant milestone in company growth. Three scaleups have been named finalists for the 2026 award.

Read more about these businesses, their founders and their breakthrough technologies below. The 2026 winners will be announced on InnovationMap.com in mid-November.

Erock

Energy infrastructure company Erock, previously known as Enchanted Rock, develops dual-purpose microgrids that rely on natural gas and renewable natural gas to produce lower carbon emissions and air pollutants than diesel generators. Its products can provide bridge power before grid interconnection, backup power during outages and dispatchable capacity that supports long-term grid reliability. The company has more than 1,100 megawatts of installed capacity and over 20 years of experience serving commercial, municipal and large-scale technology customers.

Erock completed its initial public offering this year, raising approximately $600 million in gross proceeds. It also grew its contracted power system sales backlog to approximately $1.7 billion, up tenfold year-over-year, with production sold out through 2028, according to the company's application. The company secured a major equipment order from Anthropic, began construction of the 366-megawatt El Paso Electric project supporting Meta's data center campus, and started assembly operations at its Hyperion facility in Cypress, Texas.

Hertha Metals

Hertha Metals produces lower-cost, lower-emission steel and high-purity iron. The company has developed a single-step process that uses natural gas as a direct reductant instead of metallurgical coal, which cuts production costs by more than 25 percent and emissions by up to 50 percent, according to the company. The same process produces high-purity iron needed for high-purity steels and rare earth magnets. The company says it aims to "re-industrialize America’s production of critical materials."

Hertha Metals was founded by CEO Laureen Meroueh in 2022 and emerged from stealth last year with more than $17 million in venture capital funding. The company closed a $133.65 million Series A this month and also broke ground on its $100M high-purity iron factory known as Chalyx in Conroe.

Venus Aerospace

Spacetech company Venus Aerospace is developing a high-thrust rotating detonation rocket engine (RDRE) that replaces the subsonic combustion used in conventional rocket engines. The RDRE is a compact, simpler engine that can deliver up to 15 percent greater efficiency for defense and space applications. It completed its first U.S. flight test of the engine last summer.

Venus Aerospace was founded in 2020 by CEO Cassie Duggleby and CTO Andrew Duggleby. It raised a $20 million Series A in 2022 and $42 million Series A2 in 2025. It closed a $91 million Series B earlier this year and expanded its leadership team. The company is working toward longer-duration and higher-thrust testing and advancing its flight program.

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