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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7+ can't-miss Houston business and innovation events for November

where to be

Editor's note: From life sciences to space and energy, Houston's most notable sectors will host signature conferences and opportunities to connect this month. Here’s what not to miss in November and how to register. Please note: this article may be updated to add more events.

Nov. 4 — Startup Heat Simulation

Build a team and simulate fundraising, team building, resource allocation and go-to-market decisions that real founders face in their startup journey. This in-person simulation event helps prepare participants for when the stakes are real.

This event is Wednesday, Nov. 4, from 9 a.m.-noon at the Ion. Register here.

Nov. 9 — HAN Life Science Kick-off

Houston Angel Network will host this engaging event focused on AI in the clinical space. Expect panel discussions, networking and pitches from HAN portfolio companies. Dr. Peter Pisters, former president of M.D. Anderson, will deliver a keynote address.

This event is Monday, Nov. 9, from 4-8 p.m. at the Texas A&M School of Engineering and Medicine. Register here.

Nov. 10 — Texas Life Science Forum

Rice Alliance and BioHouston will host the 15th annual Texas Life Science Forum this month, bringing together industry, emerging life science companies, academics and investors. Nearly 50 companies will present their novel concepts during the event. Michael Tores, founder and former CEO of CrossBridge Bio, will be featured in a fireside chat. Dr. Arthur Sands, president and CEO of Nurix, will present the keynote address.

This event is Tuesday, Nov. 10, from 4-5:15 p.m. at Rice University's McNair Hall. Register here.

Nov. 11 — Envision 2026: Clinical Research, Reimagined

TMCi's annual Envision conference returns this month. This year, the event will take a look at what sets Houston apart as a hub for clinical research and how TMC is exploring strategies to address the roadblocks Houston and Texas face in clinical trial efficiency.

This event is Wednesday, Nov. 11, from 3:30-6 p.m. at TMC Innovation Factory. Register here.

Nov. 11 — First Principles: Inside the Texas A&M Space Institute

Dr. Rob Ambrose, associate director of the Texas A&M Space Institute, will present on the Texas A&M Space Institute's planned 400,000-square-foot facility at NASA’s Exploration Park at the latest installment of this series. A moderated Q&A will follow.

This event is Wednesday, Nov. 11, from 3:30-6 p.m. at TMC Innovation Factory. Register here.

Nov. 12 — Technology Transfer Thursdays

Join for the third installment of Tech Transfer Thursdays, hosted by Rice University's Office of Technology Transfer. The event series focuses on how emerging university research can become commercial ventures. This month's event will focus on artificial intelligence and quantum computing. Stick around after for a community happy hour.

This event is Thursday, Nov. 12, from 5:30-7 p.m. at the Ion. Register here.

Nov. 12 — Transition on Tap

Greentown Labs’ signature networking event returns in November to foster conversations and connections within Houston's climate and energy transition ecosystem. Entrepreneurs, investors, students, philanthropists and more are invited to attend, meet colleagues, discuss solutions and engage with the growing community.

This event is Thursday, Nov. 12, from 5:30-7 p.m. at Greentown Labs. Register here.

Nov. 18-19 — American Data Centers & AI Conference and Exhibition 2026

Set to redefine the intersection of energy and digital infrastructure, the American Data Centers & AI Conference and Exhibition convenes in Houston for its second annual event. The event will address the increasing demand for high-performance computing and the sustainable development of AI infrastructure, which requires significant power. Participants can expect to learn about practical solutions in energy integration, modern data center design, and scalable approaches. The agenda includes presentations from leading experts, demonstrations of new technologies for thermal management and grid optimization, and detailed discussions on AI's environmental impact and how to reuse generated heat.

This event begins Nov. 18 at the DoubleTree Hotel at Greenway Plaza. Register here.

7 finalists compete to be crowned Houston's 2026 Startup of the Year

Cast Your Vote

Each year, the Houston Innovation Awards program recognizes the best and brightest in the local innovation community. And while most of the award winners are selected by our esteemed panel of judges, one winner is determined by you.

Voting is now open for our people's choice award: 2026 Startup of the Year. Seven exceptional finalists are in the running for the title, and your votes will determine who wins.

From innovative platforms benefiting the education, commerce, health, investment and IT sectors to next-gen memory technology and improvements for robotic supply chains, these startups are making an impact in Houston and beyond.

Read about our Startup of the Year finalists and their missions and achievements below, then cast your vote. You can vote once per day through Nov. 13, so make your voice heard.

The winner, along with the winners in all other categories, will be revealed in mid-November right here on InnovationMap.com. Stay tuned.

FluxWorks

FluxWorks

Fluxworks is aiming to shape the future of the robotic supply chain with its flagship Celestial Gear. The magnetic gearbox offers a contactless design that leads to less wear, debris and maintenance. In 2026, Fluxworks closed a $5 million seed round to scale the product.

IronLattice

IronLattice

IronLattice is developing next-generation, ferroelectric memory technology for AI and high-performance computing workloads. In June 2026, the company closed a $3 million angel round. It began wafer production this fall, with its first working device targeted for completion in spring 2027.

Lumino

Lumino

Lumino is a unified commerce ecosystem and payments platform designed to provide businesses with the technology, payments infrastructure, intelligence and tools they need to grow while creating impact in their communities. Lumino publicly launched its platform in 2026 in Houston and is rolling out its next stage of global expansion.

Progress Report

Progress Report is a K-12 learning-intelligence platform designed to go beyond identifying that a student is struggling. It traces performance to learning gaps and prerequisite skills, helping educators understand where a student is struggling and what may be causing it. Progress Report recently released a fully built production platform and launched pilots with 35 educators and 200 students across Texas and Arizona.

Rosarium Health

Rosarium Health is a platform that coordinates the full process for home accessibility upgrades and modifications for seniors and people living with disabilities. In 2026, the startup announced $6 million in seed funding and scaled to a national network of 800-plus clinicians and 3,000-plus contractors.

Thread

Thread

Thread is building an AI-powered service desk platform for Managed Service Providers (MSPs). Its technology combines agentic AI, assistive AI, automation, and real-time communication to help MSPs resolve IT support requests faster and with less manual work.

TokenRoster

TokenRoster is an AI-powered assessment platform for early-stage startups, providing founders with an investor-grade evaluation of their company before the pitch and giving investors a curated roster of vetted companies. Since launch, TokenRoster has grown to 65 companies and 43 founder accounts, with 10 assessment frameworks available.