Co-founder of Houston hypersonic engine co. lands on Inc. 500 list

Ranking It

Sassie Duggleby is on Inc.'s Female Founders 500 list for 2025. Courtesy photo

Five Houston female founders have been recognized by Inc. Magazine for their innovation, including Sassie Duggleby, the CEO and co-founder of groundbreaking space tech and engine company Venus Aerospace.

The women were named to Inc.'s Female Founders 500 list, which features female entrepreneurs based in the U.S. The group attracted approximately $9 billion in 2024 revenue and $10.6 billion in funding, according to Inc.

“Female founders know what struggle is, but they’re also experts of improvisation, adaptability, and creativity. The women featured on this year’s list exemplify these qualities," Diana Ransom, Inc. executive editor said in a release. "Through times of uncertainty, their unwavering dedication and steadfast leadership are not only inspiring but vital to driving progress.”

Venus Aerospace is the Houston-based company that is developing reusable hypersonic technology that it hopes "will revolutionize and redefine the boundaries of aviation, defense, and beyond." The company won the in the Deep Tech Business category in the 2024 Houston Innovation Awards. Duggleby also serves on the Texas Space Commission board of directors.

Duggleby is joined by four other Houston founders:

Stephanie Murphy, CEO and executive chairman of Aegis Aerospace, which provides space services, spaceflight product development, and engineering services. Murphy also serves on the Texas Aerospace Research and Space Economy Consortium Executive Committee.
Emily Cisek, founder of The Postage, now known as Paige, a comprehensive life planning and succession software platform for families and small businesses. The company won the Female-Owned Business category in the 2023 Houston Innovation Awards.
Margo Jordan, founder of adolescent mental health startup Enrichly, which uses AI-driven self-esteem development and behavioral insights to boost student performance.
Nina Magon, founder of Nina Magon Studio / Nina Magon Consumer Products, a residential and commercial interior design company.

"While I don't know many of the ladies on this list, I do know they're some of the most tenacious role models in entrepreneurship. I'm beyond honored to be included among them," Duggleby said in a LinkedIn post.

Twenty-eight Texas female founders made this list, including Kendra Scott and Allison Ellsworth, co-founder of Poppi, and many others.

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A version of this story first appeared on our sister site, InnovationMap.com.

Venus Aerospace is one step closer to high-speed international travel. Photo courtesy Venus Aerospace

Houston startup with unique engine tech reports milestone testing results

high-speed travel

A Houston-headquartered hardtech company that's working on technology to enable hypersonic travel has announced a partnership with NASA to test its tech.

Venus Aerospace has partnered with NASA’s Marshall Space Flight Center in Huntsville, Alabama, on what is reportedly the longest sustained tests of a rotating detonation rocket engine, also known as an RDRE.

“Venus believes strongly in the performance step-change that RDREs bring for both hypersonic and space applications. The partnership with NASA has been key in maturing this new technology.” Andrew Duggleby, CTO and co-founder of Venus Aerospace, says in a news release.

The company's engine injector, which used regeneratively-cooled RDRE architecture, was tested in a "flight-like manner," according to the company. The technology operated successfully for 4 minutes of hotfire testing — a significant improvement, as engine tests of this type last for only 1 to 2 seconds, according to Venus.

"This long-duration hotfire means RDRE’s have retired a major risk area and are able to move into the few remaining steps before a flight demonstration," reads the press release from Venus.

As Venus continues to develop its technology for research, defense, and commercial missions, it will continue to work with NASA, which is also looking into RDRE technology for lunar and martian landers, in-space operations and logistics, and other deep space missions, per the release, because RDREs are more compact, efficient, and versatile than traditional rocket engines.

"Venus has entered into a second-year contract with NASA to provide engine parts for research and development of NASA’s RDRE," the news release continues. "In year two, NASA, with Venus’s support, will test different propellant combinations on hardware, to operate at even higher thrust levels and to demonstrate efficiency gains promised by the detonation engine."

Last summer, Venus added a new investor to its cap table. Andrew Duggleby founded Venus Aerospace with his wife and CEO Sarah "Sassie" Duggleby in 2020, before relocating to the Houston Spaceport in 2021. Last year, Venus raised a $20 million series A round.

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This article originally ran on InnovationMap.

At last year's awards program, Cemvita Factory's co-founders, Tara and Moji Karimi, accepted the award for the Green Impact Business category. This year, Moji Karimi served as a judge

18 Houston energy startups named finalists for innovation awards program

companies to watch

The 2023 Houston Innovation Awards announced its 52 finalists — a large portion of which are promising energy transition startups.

The awards program — hosted by EnergyCapital's sister site, InnovationMap, and Houston Exponential — will name its winners on November 8 at the Houston Innovation Awards. The program was established to honor the best and brightest companies and individuals from the city's innovation community.

The following startups, which all have an energy transition element to their business, received a finalist position in one or two categories.

Click here to secure your tickets to see who wins.

ALLY Energy, helping energy companies and climate startups find, develop, and retain great talent, scored two finalist positions — one in the Female-Owned Business category and the other in the Social Impact Business category.
Eden Grow Systems, next generation farming technologies, is a finalist in the People's Choice: Startup of the Year category.
Feelit Technologies, nanotechnology for preventive maintenance to eliminate leaks, fires and explosions, increase safety and reduce downtime, is a finalist in the Female-Owned Business category and the People's Choice: Startup of the Year category.
Fervo Energy, leveraging proven oil and gas drilling technology to deliver 24/7 carbon-free geothermal energy, scored two finalist positions — one in the Sustainability Business category and the other in the People's Choice: Startup of the Year category.
FluxWorks, making frictionless gearboxes for missions in any environment, is a finalist in the Hardtech Business category.
Helix Earth Technologies, decarbonizing the built environment and heavy industry, is a finalist in the Hardtech Business category.
INOVUES, re-energizing building facades through its non-invasive window retrofit innovations, making building smarter, greener, and healthier for a better and sustainable future, was named a finalist in the Sustainability Business category.
Kanin Energy, helping heavy industry monetize their waste heat and decarbonize their operations, was named a finalist in the BIPOC-Owned Business and the Sustainability Business categories.
Mars Materials, developing a carbon-negative pathway for carbon fiber and acrylamide production using CO2 and biomass as raw materials, is a finalist in the BIPOC-Owned Business category.
Molecule, an energy/commodity trading risk management software that provides users with an efficient, reliable, responsive platform for managing trade risk, is a finalist in the Digital Solutions Business category.
Rhythm Energy, 100 percent renewable electricity service for residential customers in Texas, is a finalist in the People's Choice: Startup of the Year category.
Sage Geosystems, a cost-effective geothermal baseload energy solution company, also innovating underground energy storage solutions, was named a finalist in the Sustainability Business category.
Solugen, decarbonizing the chemical industry, is a finalist in the Hardtech Business category.
Square Robot, applying robotic technology to eliminate the need to put people into dangerous enclosed spaces and eliminate taking tanks out of service, is a finalist in the Hardtech Business category.
Syzygy Plasmonics, a deep decarbonization company that builds chemical reactors designed to use light instead of combustion to produce valuable chemicals like hydrogen and sustainable fuels, is a finalist in the Hardtech Business category.
Tierra Climate, decarbonizing the power grid faster by helping grid-scale batteries monetize their environmental benefits and change their operational behavior to abate more carbon, was named a finalist in the Sustainability Business category.
Utility Global, a technology company converting a range of waste gases into sustainable hydrogen and syngas, was named a finalist in the Sustainability Business category.
Venus Aerospace, a hypersonics company on track to fly reusable hypersonic flight platforms by 2024, is a finalist in the Hardtech Business category.

Additionally, two energy companies were named to the Corporate of the Year category, which honors corporations that supports startups and/or the Houston innovation community. Aramco Ventures and Chevron Technology Ventures are two of the four finalists in this category.

Lastly, Jason Ethier, co-founder of Lambda Catalyzer and host of the Energy Tech Startups podcast, and Kendrick Alridge, senior manager of community at Greentown Labs, scored finalist positions in the Ecosystem Builder category, as individuals who have acted as leaders in developing Houston’s startup ecosystem.

Click here to see the full list of finalists.

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Woodlands company licenses free patents to ERCOT to boost grid reliability

grid deal

Lancium, a company based in The Woodlands that specializes in infrastructure for connecting large-scale data centers to power grids, is licensing a portfolio of patents to the Electric Reliability Council of Texas (ERCOT) at no cost.

In a news release, Lancium says the intellectual property agreement “ensures ERCOT can sublicense these patents freely, thereby expanding market participation opportunities without risk of patent infringement disputes.”

“This agreement exemplifies Lancium’s dedication to supporting grid stability and innovation across the ERCOT region,” Michael McNamara, CEO of Lancium, said in a news release. “While these patents represent significant technological advancements, we believe that enabling ERCOT and its market participants to operate freely is more valuable for the long-term reliability and resilience of the Texas grid.”

The licensed patents encompass Lancium technologies that support load resources in ERCOT’s market, which covers about 90 percent of Texas. Specifically, the patents deal with controllable load resources. A controlled load resource allows ERCOT and other grids to increase or decrease power consumption during peak periods or emergencies.

ERCOT predicts power demand in Texas will nearly double by 2030, “in part due to more requests to plug into the grid from large users like data centers, crypto mining facilities, hydrogen production plants, and oil and gas companies,” The Texas Tribune reported.

Harris County looks to future with new Climate Justice Plan

progress plan

Harris County commissioners approved a five-point Climate Justice Plan last month with a 3-1 vote by Harris County commissioners. The plan was created by the Office of County Administration’s Office of Sustainability and the nonprofit Coalition for Environment, Equity and Resilience.

“Climate action planning that centers on justice has the potential to spark innovative thinking and transformative actions that will lead to meaningful and just transitions in communities, policies, funding mechanisms, and implementation strategies,” the 59-page report reads.

The plan seeks to address issues relating to ecology, infrastructure, economy, community and culture. Here’s a breakdown:

Ecology

The plan will work towards clean air, water, and soil efforts that support the health of the environment, renewable energy that reduces greenhouse gases and pollution, and conservation and protection of our natural resources. Some action items include:

Increasing resources for local government agencies
Developing a free native seed bank at all libraries
Identifying partners and funding streams to reduce the costs of solar power for area households
Producing renewable energy on large tracts of land
Expanding tree planting by 20 percent
Providing tree maintenance and restoration efforts
Incentivizing gray water systems and filtration to conserve fresh water

Economy

In terms of the economy, the Climate Justice Plan wants the basic needs of the community met and wants to also incentivize resilience, sustainability, and climate solutions, and recycling and reuse methods. Specific actions include:

Quantifying the rising costs associated with climate change
Expanding resources and partnering with organizations to support programs that provide food, utility, housing, and direct cash assistance
Supporting a coalition of area non-profit organizations and county offices to strengthen social service support infrastructure
Supporting home repair, solar installation, and weatherization programs
Identify methods to expand free and efficient recycling and composting services
Creating a climate tax levied on greenhouse gas emissions to develop a climate fund to offset the impacts of pollution

Infrastructure

As Houston has been prone to hurricanes and flooding damage, the infrastructure portion of the plan aims to protect the region from risks through preventative floodplain and watershed management. Highlights include:

Investing in generators and solar power, plus battery backup and bidirectional EV charging for all county libraries
Providing more heating and cooling centers with charging stations
Coordinating and deploying community microgrids, especially in neighborhoods prone to losing power
Seeking partnerships and funding for low- or no-cost water purifiers for areas with the highest needs
Protecting the electric grid through regular maintenance and upgrading, and advocating for greater accountability and responsiveness among appointed officials
Developing regulations to require resilient power line infrastructure to prevent outages and failures in new developments

Community and Culture

Housing, a strong economy and access to affordable and healthy food will be achieved under the community aspect of the plan. Under culture, the plan seeks to share knowledge and build trust. Key goals include:

Developing a campaign to promote the use of the Harris County 311 system to identify critical community concerns
Supporting the development of a Community Housing Plan that ensures stable and safe housing
Advocating for revisions to Federal Emergency Management Agency (FEMA) disaster funding to account for renters’ losses and unmet housing needs
Developing and funding a whole-home program for repairs, weatherization, and solar energy
Developing culturally relevant public relations campaigns to increase knowledge of health, environment and biodiversity across generations

Read the full plan here.

Houston company completes orphan well decommission project in the Gulf

temporary abandonment

Houston-based Promethean Energy announced this month that it has successfully decommissioned offshore orphaned wells in the Matagorda Island lease area.

Around this time last year, the company shared that it would work on the temporary abandonment of nine orphan wells on behalf of the Department of Interior's Bureau of Safety and Environmental Enforcement, or BSEE, in the area. Promethean is known for decommissioning mature assets in a cost-effective and environmentally sustainable manner.

“Our team is incredibly proud to have completed this critical work efficiently, safely, and ahead of budget,” Steve Louis, SVP of decommissioning at Promethean Energy, said in a news release. “By integrating our expertise, technologies and strategic partnerships, we have demonstrated that decommissioning can be both cost-effective and environmentally responsible.”

The company plans to use the Matagora Island project as a replicable model to guide similar projects worldwide. The project used comprehensive drone inspections, visual intelligence tools for safety preparations and detailed well diagnostics to plug the wells.

Next up, Promethean is looking to decommission more of the estimated 14,000 unplugged wells in the Gulf.

"Building on our strong execution performance, our strategy is to continue identifying synergies with other asset owners, fostering collaboration, and developing sustainable decommissioning campaigns that drive efficiency across the industry," Ernest Hui, chief strategy officer of Promethean Energy, added in the release.

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