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40+ climatetech startups join Greentown, including a dozen from Houston

green team

Twelve local startups have joined Greentown Houston, along with others from around the world. Photo courtesy Greentown Labs.

More than 40 climatetech startups joined the Greentown Labs Houston community in the second half of 2025. Twelve hail from the Bayou City.

The companies are among a group of nearly 70 that joined the climatetech incubator, which is co-located in Houston and Boston, in Q3 and Q4.

The new companies that have joined the Houston incubator specialize in a variety of clean energy applications, from green hydrogen-producing water-splitting cycles to drones that service wind turbines.

The local startups that joined Greentown Houston include:

  • Houston-based Wise Energie, which delivers turnkey microgrids that blend vertical-axis wind, solar PV, and battery storage into a single, silent system.
  • The Woodlands-based Resollant, which is developing compact, zero-emissions hydrogen and carbon reactors to provide low-cost, scalable clean hydrogen and high-purity carbon for the energy and manufacturing sectors.
  • Houston-based ClarityCastle, which designs and manufactures modular, soundproof work pods that replace traditional drywall construction with reusable, low-waste alternatives made from recycled materials.
  • Houston-based WattSto Energy, which manufactures vanadium redox flow batteries to deliver long-duration storage for both grid-scale projects and off-grid microgrids.
  • Houston-based AMPeers, which delivers advanced, high-temperature superconductors in the U.S. at a fraction of traditional costs.
  • Houston-based Biosimo, which is developing bio-based platform chemicals, pioneering sustainable chemistry for a healthier planet and economy.
  • Houston-based Ententia, which offers purpose-built, generative AI for industry.
  • Houston-based GeoKiln Energy Innovation, which is developing a new way to produce clean hydrogen by accelerating natural geologic reactions in iron-rich rock formations using precision electrical heating.
  • Houston-based Timbergrove, which builds AI and IoT solutions that connect and optimize assets—boosting visibility, safety, and efficiency.
  • Houston-based dataVediK, which combines energy-domain expertise with advanced machine learning and intelligent automation to empower organizations to achieve operational excellence and accelerate their sustainability goals.
  • Houston-based Resonant Thermal Systems, which uses a resonant energy-transfer (RET) system to extract critical minerals from industrial and natural brines without using membranes or grid electricity.
  • Houston-based Torres Orbital Mining (TOM),which develops autonomous excavation systems for extreme environments on Earth and the moon, enabling safe, data-driven resource recovery and laying the groundwork for sustainable off-world industry.

Other startups from around the world joined the Houston incubator in the same time period, including:

More than 100 startups joined Greentown this year, according to an end-of-year reflection shared by Greentown CEO Georgina Campbell Flatter.

Flatter joined Greentown in the top leadership role in February 2025. She succeeded former CEO and president Kevin Knobloch, who stepped down in July 2024.

"I moved back to the United States in March 2025 after six years overseas—2,000 miles, three children, and one very patient husband later. Over these months, I’ve had the chance to hear from the entrepreneurs, industry leaders, investors, and partners who make this community thrive. What I’ve experienced has left me brimming with urgent optimism for the future we’re building together," she said in the release.

According to Flatter, Greentown alumni raised more than $2 billion this year and created more than 3,000 jobs.

"Greentown startups and ecosystem leaders—from Boston, Houston, and beyond—are showing that we can move further and faster together. That we don’t have to choose between more energy or lower emissions, or between increasing sustainability and boosting profit. I call this the power of 'and,'" Flatter added. "We’re working for energy and climate, innovation and scale, legacy industry and startups, prosperity for people and planet. The 'and' is where possibility expands."

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Houston Innovation Awards nominations are open through August 31. Photo courtesy of InnovationMap

Nominations close Aug. 31 for Houston Innovation Awards — submit today

Awards Season

Calling all Houston energy innovators: The Houston Innovation Awards return this fall to celebrate the best and brightest in the Houston innovation ecosystem, and that includes those leading the energy transition.

Presented by InnovationMap, the fifth annual Houston Innovation Awards will take place November 13 at Greentown Labs.

The awards program will honor the top startups and innovators in Houston across 10 categories, and we're asking you to nominate the most deserving Houston innovators and innovative companies, including those in the energy transition sector.

This year's categories are:

  • Minority-founded Business, honoring an innovative startup founded or co-founded by BIPOC or LGBTQ+ representation.
  • Female-founded Business, honoring an innovative startup founded or co-founded by a woman.
  • Energy Transition Business, honoring an innovative startup providing a solution within renewables, climatetech, clean energy, alternative materials, circular economy, and beyond.
  • Health Tech Business, honoring an innovative startup within the health and medical technology sectors.
  • Deep Tech Business, honoring an innovative startup providing technology solutions based on substantial scientific or engineering challenges, including those in the AI, robotics, and space sectors.
  • Startup of the Year (People's Choice), honoring a startup celebrating a recent milestone or success. The winner will be selected by the community via an interactive voting experience.
  • Scaleup of the Year, honoring an innovative later-stage startup that's recently reached a significant milestone in company growth.
  • Incubator/Accelerator of the Year, honoring a local incubator or accelerator that is championing and fueling the growth of Houston startups.
  • Mentor of the Year, presented by Houston Community College, honoring an individual who dedicates their time and expertise to guide and support budding entrepreneurs.
  • Trailblazer, honoring an innovator who's made a lasting impact on the Houston innovation community.

Nominations may be made on behalf of yourself, your organization, and other leaders and institutions in the local innovation scene. The nomination period closes on August 31, so don't delay — nominate today at this link, or fill out the embedded form below.

A panel of esteemed judges will review the nominations, and determine the finalists and winners. Finalists will be unveiled on InnovationMap.com in early October, and the 2025 Houston Innovation Awards winners will be announced live at our event on November 13.

Tickets will go on sale this fall. Stay tuned for that announcement.

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Interested in Innovation Awards sponsorship opportunities? Please contact sales@innovationmap.com.

Houston-based Solidec has closed an oversubscribed pre-seed round led by New Climate Ventures. Photo courtesy Greentown Labs.

Houston clean-chemicals startup Solidec raises $2M to scale tech

fresh funding

Solidec, a Houston startup that specializes in manufacturing “clean” chemicals, has raised more than $2 million in pre-seed funding.

Houston-based New Climate Ventures led the oversubscribed pre-seed round, with participation from Plug and Play Ventures, Ecosphere Ventures, the Collaborative Fund, Safar Partners, Echo River Capital and Semilla Climate Capital, among other investors.

Solidec’s approach to chemical manufacturing replaces centralized infrastructure with modular on-site production using only air, water and electricity. Solidec’s platform is powered by modular reactors capable of producing widely used chemicals such as hydrogen peroxide, formic acid, acetic acid and ethylene.

“We’ve known the Solidec team for almost two years and have developed a high degree of conviction in the team, their technology, and their go-to-market strategy,” Eric Rubenstein, managing partner at New Climate Ventures, said in a news release. “We’re particularly excited about Solidec’s ability to produce many different widely used chemicals. It gives them critical flexibility to expand and serve a broad customer base.”

Solidec is initially focusing on hydrogen peroxide.

“Traditionally, hydrogen peroxide is produced in centralized, energy-intensive facilities using carbon-intensive inputs, then transported long distances, resulting in a significant carbon footprint,” Ryan DuChanois, co-founder and CEO of Solidec, said in the release. “Solidec’s modular reactor produces clean chemicals like hydrogen peroxide on-site, in fewer steps, and with less energy, slashing emissions, supply-chain risk, and cost.”

Solidec said its technology “is poised to disrupt the multibillion-dollar commodity and chemical industries.” The company has already signed up several customers.

The startup, a Rice University spinout, is a graduate of the Chevron Catalyst Program and a member of Greentown Labs Houston. It was cofounded by DuChanois, Haotian Wang and Yang Xia.

NanoTech is targeting new overseas markets for its energy efficiency products. Photo via Getty Images

Promising Houston startup expands energy efficiency product to Middle East, Singapore

big move

NanoTech Materials has announced a big expansion for its business.

The Houston company, which created a roof coating using nanotechnology that optimizes energy efficiency, has partnered with Terminal Subsea Solutions Marine Service SP to bring its products to the Gulf Cooperation Council and Singapore. TSSM will become a partner of Houston’s NanoTech Materials products, which will include the Cool Roof Coat, Vehicular Coat, and Insulative Coat for the GCC countries and Singapore.

NanoTech Materials technology that ranges from roof coatings on mid- to low-rise buildings to shipping container insulation to coating trucks and transportation vehicles will be utilized by TSSM in the partnership. NanoTech’s efforts are focused on heat mitigation that can reduce energy costs, enhance worker safety, and minimize business risks in the process.

“Businesses and communities within the GCC and Singapore feel the impact of extreme temperatures and longer Summers more acutely than any other region in the world,” Mike Francis, CEO of NanoTech Materials, says in a news release. “We have an opportunity to make a real impact here through reduced energy load, cooler and safer working conditions, and a reduced carbon emissions output from the hottest, driest place on earth. We are incredibly excited to be partnering with our colleagues at TSSM to bring this powerful technology to the region.”

One of the areas that will benefit from this collaboration is the Middle East. The GCC region is characterized by a desert climate, which has average annual temperature reaching 107.6°F and summer peaks climbing as high as 130°F. The effects of these extreme conditions can be dangerous for workers especially with strict labor laws mandating midday work bans under black flag conditions, which can result in productivity losses as well.

NanoTech’s proprietary technology, the Insulative Ceramic Particle (ICP), will be used to address challenges in energy efficiency and heat control in the logistics and built environment sector. The platform can be integrated into many applications, and the impact can range from reducing greenhouse gas emissions to protecting communities that are wildfire-prone. The core of the technology has a lower conductivity than aerogels. It also has a “near-perfect emissivity score” according to the company. The NanoTech ICP is integrated with base matrix carriers; building materials, coatings, and substrates, which gives the materials heat conservation, rejection, or containment properties.

By combining the ICP into an acrylic roof coating, NanoTech has created the Cool Roof Coat, which reflects sunlight and increases the material's heat resistance. This can lower indoor temperatures by 25 to 45°F in single-story buildings and reduce the carbon emissions of mid to low-rise buildings. This can potentially equal energy savings from 20 percent up to 50 percent, which would surpass the average 15 percent savings of traditional reflective only coatings.

“This technology will have a huge impact on supporting the region's aggressive climate initiatives, such as Saudi Arabia’s Green Initiative, aiming to reduce carbon emissions by 278 million tons annually by 2030,” Jameel Ahmed, managing director at TSSM, says in the release. “The regional efforts to enhance climate action and economic opportunities through substantial investments in green technologies and projects are evident, and we are proud to be offering a product that can make a difference.”

NanoTech says its coating maintains its effectiveness over time and doesn’t suffer UV degradation issues which are helpful, especially in extreme weather conditions workers and businesses face in regions like the Middle East.

IBM and Boxes recently partnered to integrate the IBM watsonx Assistant into Boxes devices, providing a way for consumer packaged brands to find out more than ever about what its customers like and want. Photo courtesy of Boxes

Houston startup taps new corporate partner for AI-backed sustainability consumer tech

out of the boxes

With the help of a new conversational artificial intelligence platform, a Houston startup is ready to let brands get up close and personal with consumers while minimizing waste.

IBM and Boxes recently partnered to integrate the IBM watsonx Assistant into Boxes devices, providing a way for consumer packaged brands to find out more than ever about what its customers like and want.

The Boxes device, about the size of a 40-inch television screen, dispenses products to consumers in a modern and sustainable spin on the old-fashioned large vending machine.

CEO Fernando Machin Gojdycz learned that business from his entrepreneur father, Carlos Daniel Machin, while growing up in Uruguay.

“That’s where my passion comes from — him,” Gojdycz says of his father. In 2016, Gojdycz founded Boxes in Uruguay with some engineer friends

Funded by a $2,000 grant from the University of Uruguay, the company's mission was “to democratize and economize affordable and sustainable shopping,” in part by eliminating wasteful single-use plastic packaging.

“I worked for one year from my bedroom,” he tells InnovationMap.

Fernando Machin Gojdycz founded Boxes in Uruguay before relocating the company to Greentown Houston. Photo courtesy of Boxes

The device, attached to a wall, offers free samples, or purchased products, in areas of high foot traffic, with a touch-screen interface. Powered by watsonx Assistant, the device asks survey questions of the customer, who can answer or not, on their mobile devices, via a QR code.

In return for completing a survey, customers can get a digital coupon, potentially generating future sales. The software and AI tech tracks sales and consumer preferences, giving valuable real-time market insight.

“This is very powerful,” he says.

Boxes partnered in Uruguay with major consumer brands like Kimberly-Clark, SC Johnson and Unilever, and during COVID, pivoted and offered PPE products. Then, with plans of an expansion into the United States, Boxes in 2021 landed its first U.S. backer, with $120,000 in funding from startup accelerator Techstars.

This led to a partnership with the Minnesota Twins, where Boxes devices at Target Field dispensed brand merchandise like keychains and bottles of field dirt.

Gojdycz says while a company in the Northeast is developing a product similar in size, Boxes is not “targeting traditional spaces.” Its software and integration with AI allows Boxes to seamlessly change the device screen and interface, remotely, as well.

Boxes aims to provide the devices in smaller spaces, like restrooms, where they have a device at the company's headquarters at climate tech incubator Greentown Labs. Boxes also recently added a device at Hewlett Packard Enterprise headquarters in Spring, as part of HPE’s diversity startup program.

Boxes hopes to launch another sustainable innovation later this year, in universities and supermarkets. The company is also developing a device that would offer refillable detergent and personal cleaning products like shampoo and conditioner with a reusable container.

Since plastic packaging accounts for 40 percent of retail price, consumers would pay far less, making a huge difference, particularly for lower-income families, he says.

“We are working to make things happen, because we have tried to pitch this idea,” he says.

Some supermarket retailers worry they may lose money or market share, and that shoppers may forget to bring the refill bottles with them to the store, for example.

“It’s about..the U.S. customer,” he says, “….but we think that sooner or later, it will come.”

Boxes has gotten funding from the accelerator startup branch of Houston-based software company Softeq, as well as Mission Driven Finance, Google for Startups Latino Founders Fund, and Right Side Capital, among others.

“Our primary challenges are scaling effectively with a small, yet compact team and maintaining control over our financial runway,” Gojdycz says.

The company has seven employees, including two on its management team.

Gojdycz says they are actively hiring, particularly in software and hardware engineering, but also in business development.

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This article originally ran on InnovationMap.

Do you think you know the best of Houston's innovation community? Now's your chance to shine the spotlight on a deserving innovator. Photo via Getty Images

Annual awards program calls for sustainable startups, innovative corporates in Houston

nominations open

Calling all Houston innovators in the energy transition space — an annual awards program wants to recognize you.

For the third year, InnovationMap, EnergyCapital's sister site, is hosting an awards program that will recognize the best of the rest in Houston's innovation ecosystem. The awards program will be on Wednesday, November 8, at Silver Street Studios, with tickets going on sale later this month.

The program features a dozen awards this year — some of which should be interesting to the Houston energy transition community:

  • Hardtech Business, honoring an innovative company developing and commercializing a physical technology
  • Digital Solutions Business, honoring an innovative company developing and programming a digital solution to a problem in an industry
  • Sustainability Business, honoring an innovative company providing a solution within renewables, climatetech, clean energy, alternative materials, circular economy, and beyond
  • Corporate of the Year, honoring a corporation that supports startups and/or the Houston innovation community

The nomination period — which includes submitting nominations on behalf of yourself or others — will close September 19. Nominees will be sent an application, which will be due October 4. A panel of judges will review the applications and finalists will be announced and notified ahead of the event.

If you are interested in sponsorship opportunities, please reach out to misti@gowmedia.com.

Click here to submit a nomination or see form below.

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Mars Materials makes breakthrough in clean carbon fiber production

Future of Fiber

Houston-based Mars Materials has made a breakthrough in turning stored carbon dioxide into everyday products.

In partnership with the Textile Innovation Engine of North Carolina and North Carolina State University, Mars Materials turned its CO2-derived product into a high-quality raw material for producing carbon fiber, according to a news release. According to the company, the product works "exactly like" the traditional chemical used to create carbon fiber that is derived from oil and coal.

Testing showed the end product met the high standards required for high-performance carbon fiber. Carbon fiber finds its way into aircraft, missile components, drones, racecars, golf clubs, snowboards, bridges, X-ray equipment, prosthetics, wind turbine blades and more.

The successful test “keeps a promise we made to our investors and the industry,” Aaron Fitzgerald, co-founder and CEO of Mars Materials, said in the release. “We proved we can make carbon fiber from the air without losing any quality.”

“Just as we did with our water-soluble polymers, getting it right on the first try allows us to move faster,” Fitzgerald adds. “We can now focus on scaling up production to accelerate bringing manufacturing of this critical material back to the U.S.”

Mars Materials, founded in 2019, converts captured carbon into resources, such as carbon fiber and wastewater treatment chemicals. Investors include Untapped Capital, Prithvi Ventures, Climate Capital Collective, Overlap Holdings, BlackTech Capital, Jonathan Azoff, Nate Salpeter and Brian Andrés Helmick.

Tesla no longer world's biggest EV maker as sales drop for second year

EV Update

Tesla lost its crown as the world’s bestselling electric vehicle maker as a customer revolt over Elon Musk’s right-wing politics, expiring U.S. tax breaks for buyers and stiff overseas competition pushed sales down for a second year in a row.

Tesla said that it delivered 1.64 million vehicles in 2025, down 9% from a year earlier.

Chinese rival BYD, which sold 2.26 million vehicles last year, is now the biggest EV maker.

It's a stunning reversal for a car company whose rise once seemed unstoppable as it overtook traditional automakers with far more resources and helped make Musk the world's richest man. The sales drop came despite President Donald Trump's marketing effort early last year when he called a press conference to praise Musk as a “patriot” in front of Teslas lined up on the White House driveway, then announced he would be buying one, bucking presidential precedent to not endorse private company products.

For the fourth quarter, Tesla sales totaled 418,227, falling short of even the much reduced 440,000 target that analysts recently polled by FactSet had expected. Sales were hit hard by the expiration of a $7,500 tax credit for electric vehicle purchases that was phased out by the Trump administration at the end of September.

Tesla stock fell 2.6% to $438.07 on Friday.

Even with multiple issues buffeting the company, investors are betting that Tesla CEO Musk can deliver on his ambitions to make Tesla a leader in robotaxi services and get consumers to embrace humanoid robots that can perform basic tasks in homes and offices. Reflecting that optimism, the stock finished 2025 with a gain of approximately 11%.

The latest quarter was the first with sales of stripped-down versions of the Model Y and Model 3 that Musk unveiled in early October as part of an effort to revive sales. The new Model Y costs just under $40,000 while customers can buy the cheaper Model 3 for under $37,000. Those versions are expected to help Tesla compete with Chinese models in Europe and Asia.

For fourth-quarter earnings coming out in late January, analysts are expecting the company to post a 3% drop in sales and a nearly 40% drop in earnings per share, according to FactSet. Analysts expect the downward trend in sales and profits to eventually reverse itself as 2026 rolls along.

Musk said earlier last year that a “major rebound” in sales was underway, but investors were unruffled when that didn't pan out, choosing instead to focus on Musk's pivot to different parts of business. He has has been saying the future of the company lies with its driverless robotaxis service, its energy storage business and building robots for the home and factory — and much less with car sales.

Tesla started rolling out its robotaxi service in Austin in June, first with safety monitors in the cars to take over in case of trouble, then testing without them. The company hopes to roll out the service in several cities this year.

To do that successfully, it needs to take on rival Waymo, which has been operating autonomous taxis for years and has far more customers. It also will also have to contend with regulatory challenges. The company is under several federal safety investigations and other probes. In California, Tesla is at risk of temporarily losing its license to sell cars in the state after a judge there ruled it had misled customers about their safety.

“Regulatory is going to be a big issue,” said Wedbush Securities analyst Dan Ives, a well-known bull on the stock. “We're dealing with people's lives.”

Still, Ives said he expects Tesla's autonomous offerings will soon overcome any setbacks.

Musk has said he hopes software updates to his cars will enable hundreds of thousands of Tesla vehicles to operate autonomously with zero human intervention by the end of this year. The company is also planning to begin production of its AI-powered Cybercab with no steering wheel or pedals in 2026.

To keep Musk focused on the company, Tesla’s directors awarded Musk a potentially enormous new pay package that shareholders backed at the annual meeting in November.

Musk scored another huge windfall two weeks ago when the Delaware Supreme Court reversed a decision that deprived him of a $55 billion pay package that Tesla doled out in 2018.

Musk could become the world's first trillionaire later this year when he sells shares of his rocket company SpaceX to the public for the first time in what analysts expect would be a blockbuster initial public offering.

Renewables to play greater role in powering data centers, JLL says

Data analysis

Renewable energy is evolving as the primary energy source for large data centers, according to a new report.

The 2026 Global Data Center Outlook from commercial real estate services giant JLL points out that the pivot toward big data centers being powered by renewable energy stems from rising electricity costs and tightening carbon reduction requirements. In the data center sector, renewable energy, such as solar and wind power, is expected to outcompete fossil fuels on cost, the report says.

The JLL forecast carries implications for the Houston area’s tech and renewable energy sectors.

As of December, Texas was home to 413 data centers, second only to Virginia at 665, according to Visual Capitalist. Dozens more data centers are in the pipeline, with many of the new facilities slated for the Houston, Austin, Dallas-Fort Worth and San Antonio areas.

Amid Texas’ data center boom, several Houston companies are making inroads in the renewable energy market for data centers. For example, Houston-based low-carbon energy supplier ENGIE North America agreed last May to supply up to 300 megawatts of wind power for a Cipher Mining data center in West Texas.

The JLL report says power, not location or cost, will become the primary factor in selecting sites for data centers due to multi-year waits for grid connections.

“Energy infrastructure has emerged as the critical bottleneck constraining expansion [of data centers],” the report says. “Grid limitations now threaten to curtail growth trajectories, making behind-the-meter generation and integrated battery storage solutions essential pathways for sustainable scaling.”

Behind-the-meter generation refers to onsite energy systems such as microgrids, solar panels and solar battery storage. The report predicts global solar capacity will expand by roughly 100 gigawatts between 2026 and 2030 to more than 10,000 gigawatts.

“Solar will account for nearly half of global renewable energy capacity in 2026, and despite its intermittent properties, solar will remain a key source of sustainable energy for the data center sector for years to come,” the report says.

Thanks to cost and sustainability benefits, solar-plus-storage will become a key element of energy strategies for data centers by 2030, according to the report.

“While some of this energy harvesting will be colocated with data center facilities, much of the energy infrastructure will be installed offsite,” the report says.

Other findings of the report include:

  • AI could represent half of data center workloads by 2030, up from a quarter in 2025.
  • The current five-year “supercycle” of data center infrastructure development may result in global investments of up to $3 trillion by 2030.
  • Nearly 100 gigawatts worth of new data centers will be added between 2026 and 2030, doubling global capacity.

“We’re witnessing the most significant transformation in data center infrastructure since the original cloud migration,” says Matt Landek, who leads JLL’s data center division. “The sheer scale of demand is extraordinary.”

Hyperscalers, which operate massive data centers, are allocating $1 trillion for data center spending between 2024 and 2026, Landek notes, “while supply constraints and four-year grid connection delays are creating a perfect storm that’s fundamentally reshaping how we approach development, energy sourcing, and market strategy.”

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