12 Houston climatetech startups join Greentown Labs' growing incubator

Startup Talk

More than 40 startups joined Greentown Labs in the second half of 2025. Photo via GreentownLabs.com

More than 40 climatetech startups joined the Greentown Labs Houston community in the second half of 2025, 12 of which hail from the Bayou City.

The companies are among a group of nearly 70 total 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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This article originally appeared on EnergyCaptialHTX.com.

Greentown Labs has announced its newest climatetech incubator cohort. Photo via GreentownLabs.com

Greentown Labs adds 5 new Houston startups to climatetech incubator

Going Green

Greentown Labs announced that it added five startups to its Houston community in Q1 of 2025.

The companies are among a group of 19 that joined the climatetech incubator, which is co-located in Houston and Boston, in the same time period. The companies that joined the Houston-based lab specialize in a number of "green" applications, from converting plastic waste into sustainable materials to developing energy-storage solutions.

The new Houston members include:

  • Concept Loop, a project of Pakistan-based Innova8e Inc., aims to repurpose post-industrial and post-consumer plastic waste into sustainable building materials.
  • GeoFuels, a Sugar Land-based company that produces hydrogen by using baseload geothermal power and methane pyrolysis.
  • PLASENE, a Houston-based company with an innovative platform that converts plastic waste into liquid fuel and low-carbon hydrogen through its proprietary catalysts and modular, scalable, pre-engineered units platform. The company was named to Greentown's ACCEL Year 3 cohort earlier this year.
  • RepAir Carbon, an Israeli company with a fully electric, zero-heat carbon-removal technology that consumes minimal energy, operates without liquids or solvents, and produces no hazardous materials or waste.
  • RotorVault from Pasadena, California, is commercializing energy-storage and load-following solutions that are containerized, modular, and field-deployable systems built on flywheel technology.

Fourteen other companies will join Greentown Boston's incubator. See the full list here.

PLASENE and five other new members—Thola, Respire Energy, Andros Innovations, FAST Metals and Tato Labs—join Greentown Labs through its most recent Advancing Climatetech and Clean Energy Leaders Program, or ACCEL, cohort. ACCEL, which works to advance BIPOC-led startups in the climatetech space, announced its third cohort last month.

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A version of this story originally appeared on our sister site, EnergyCapitalHTX.

Health tech’s gradual success, fueled by policy support, public advocacy, and strategic investment, provides a blueprint for accelerating the growth and impact of climate tech. Photo via Getty Images

Houston innovator on how health tech’s rise offers roadmap for climatetech growth

guest column

Over the past several decades, climate tech has faced numerous challenges, ranging from inconsistent public support to a lack of funding from cautious investors. While grassroots organizations and climate innovators have made notable efforts to address urgent environmental issues, we have yet to see large-scale, lasting impact.

A common tendency is to compare climate tech to the rapid advancements made in digital and software technology, but perhaps a more appropriate parallel is the health tech sector, which encountered many of the same struggles in its early days.

Observing the rise of health tech and the economic and political support it received, we can uncover strategies that could stabilize and propel climate tech forward.

Health tech's slow but steady rise

Health tech’s slow upward trajectory began in the mid-20th century, with World War II serving as a critical turning point for medical research and development. Scientists working on wartime projects recognized the broader benefits of increased research funding for the general public, and soon after, the Public Health Service Act of 1944 was passed. This landmark legislation directed resources toward eradicating widespread diseases, viewing them as a national economic threat. By acknowledging diseases as a danger to both public health and the economy, the government laid the groundwork for significant policy changes.

This serves as an essential lesson for climate tech: if the federal government were to officially recognize climate change as a direct threat to the nation’s economy and security, it could lead to similar shifts in policy and resource allocation.

The role of public advocacy and federal support

The growth of health tech wasn’t solely reliant on government intervention. Public advocacy played a key role in securing ongoing support. Voluntary health agencies, such as the American Cancer Society, lobbied for increased funding and spread awareness, helping to attract public interest and investment. But even with this advocacy, early health tech startups struggled to secure venture capital. VCs were hesitant to invest in areas they didn’t fully understand, and without sustained government funding and public backing, it’s unlikely that health tech would have grown as quickly as it has.

The lesson here for climate tech is clear: strong public advocacy and education are crucial. However, unlike health tech, climate tech faces a unique obstacle — there is still a significant portion of the population that either denies the existence of climate change or doesn’t view it as an immediate concern. This lack of urgency makes it difficult to galvanize the public and attract the necessary long-term investment.

Government support: A mixed bag

There have been legislative efforts to support climate tech, though they haven’t yet led to the explosive growth seen in health tech. For example, the Federal Technology Transfer Act of 1986 and the Bayh-Dole Act of 1980 gave universities and small businesses the rights to profit from their innovations, including climate-related research. More recently, the Inflation Reduction Act (IRA) of 2022 has been instrumental in advancing climate tech by creating opportunities to build projects, lower household energy costs, and reduce greenhouse gas emissions.

Despite this federal support, many climate tech companies are still struggling to scale. A primary concern for investors is the longer time horizon required for climate startups to yield returns. Scalability is crucial — companies must demonstrate how they will grow profitably over time, but many climate tech startups lack practical long-term business models.

As climate investor Yao Huang put it, “At the end of the day, a climate tech company needs to demonstrate how it will make money. We can apply political pressure and implement governmental policies, but if it is not profitable, it won’t scale or create meaningful impact.”

The public’s role in scaling climate tech

Health tech’s success can largely be attributed to a combination of federal funding, public advocacy, and long-term investment from knowledgeable VCs. Climate tech has federal support in place, thanks to the IRA, but is still lacking the same level of public backing. Health tech overcame its hurdles when public awareness about the importance of medical advancements grew, and voluntary health agencies helped channel donations toward research and innovation.

In contrast, climate nonprofits like Cool Earth, Environmental Defense Fund, and Clean Air Task Force face a severe funding shortfall. A 2020 study revealed that climate nonprofits aiming to reduce greenhouse gas emissions only received $2 billion in donations, representing just 0.4% of all philanthropic funding. Without greater public awareness/sense of urgency and financial support, these groups cannot effectively advocate for climate tech startups or lobby for necessary policy changes. This type of philanthropic funding is also known as ‘catalytic capital’ or ‘impact-first-capital’. Prime Impact Fund is one such fund that does not ‘view investments as concessionary on return’. Rather their patient and flexible capital allows support of high risk, high-reward ventures.

A path forward for climate tech

The most valuable insight from health tech’s growth is that government intervention, while critical, is not enough to guarantee the success of an emerging sector. Climate tech needs a stronger support system, including informed investors, widespread public backing, and nonprofits with the financial resources to advocate for industry-wide growth.

If we can channel the same sense of urgency and public commitment toward climate change as we did for health crises in the past, climate tech could overcome its current obstacles.The future of climate tech depends not just on government policies, but on educating the public, rallying financial support, and building a robust infrastructure for long-term growth.

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Nada Ahmed is the founding partner at Houston-based Energy Tech Nexus, a startup hub for the energy transition.

This article originally ran on EnergyCapital.
Greentown Houston has two new automation tools from its corporate partners. Photo via Greentown Labs/LinkedIn

Houston climatetech incubator brings in new automation tools for startup use

Houston’s Greentown Labs announced new resources and equipment for its members thanks to two corporate partnerships.

Greentown Houston is now home to new tools from Emerson and Puffer to help members implement strong foundations for access to contextualized data.

Automation is the theme with the latest resources, as the process assists with a startup's journey to “standardization and scalability” according to a news release from Greentown Labs. Members will have access to these two units and platforms. The DeltaV Automation Platform is a data-driven decision-making resource that aims to improve operational performance while reducing risks, costs, and downtime. It integrates real-time analytics, advanced automation solutions, sophisticated control systems, and lifecycle services.

Puffer-Sweiven is a localized, single point of contact for sales, service, and applied engineering for Emerson Automation Solutions in the Texas Gulf Coast and Central Texas area with the capabilities to combine with other members in North America to leverage global reach and technologies. Puffer is an Emerson Impact Partner.

With access to the two units, Greentown Labs member companies can further explore easy-to-use, integrated-by-design DeltaV Distributed Control System. With the system, companies and members can better scale new technologies into pilot scale, optimize processes for high quality products, and implement a smart foundation for access to contextualized data. Global ROC is one company that is already utilizing the new resources at Greentown Labs.

“Our member Global ROC, which is developing a solution for cooling tower systems that reduces chemical consumption, saves water, and reduces energy costs, plans to use the system in two ways,” Global ROC CEO Ely Trujillo said to Greentown Labs via LinkedIn.

The startup will be able to create a control method that can be applied to future projects by using and comparing Global ROC’s products with the Delta V’s advanced function blocks. Trujilloalso plans to train team members to set up a Proportional Integral Derivative (PID) controller. The PID involves building a lab test box that connects to the DeltaV’s CHARM modules to control a process to a temperature by varying amperage through the DeltaV’s PID controller.

As part of the 3-year kickoff of the Texas Exchange for Energy and Climate Entrepreneurship (TEX-E), Greentown Labs also celebrated 87 Texas students from The University of Texas at Austin, Texas A&M University, University of Houston, Rice University, Prairie View A&M University, and the Massachusetts Institute of Technology have been accepted into this year's Fellowship. The students will gain access to hands-on experiences including internships, pitch competitions, entrepreneurship bootcamps, courses, and conferences geared to help the climate and energy-transition innovation field.

In March, Greentown Labs and Browning the Green Space were named the newest accelerator for the Advancing Climatetech and Clean Energy Leaders Program, or ACCEL. The seven selected startups will have a year-long curated curriculum, incubation at Greentown's two locations, and a non-dilutive $25,000 grant.

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This article originally ran on InnovationMap.

Fervo Energy scored a $244 million round of funding thanks to existing and new investors. Photo via Fervo Energy

Houston geothermal startup secures $244M in funding round led by energy corporate

fresh funding

An Oklahoma-based shale oil and gas leader has backed Fervo Energy's latest round of funding, supporting the startup's geothermal technology yet again.

Fervo announced its latest round of funding this week to the tune of $244 million. The round was led by Devon Energy, a company that's previously backed the startup.

“Demand for around-the-clock clean energy has never been higher, and next-generation geothermal is uniquely positioned to meet this demand,” Tim Latimer, Fervo CEO and co-founder, says in a news release. “Our technology is fully derisked, our pricing is already competitive, and our resource pipeline is vast. This investment enables Fervo to continue to position geothermal at the heart of 24/7 carbon-free energy production.”

Founded in 2017, Fervo provides carbon-free energy through development of next-generation geothermal power. The company has recently reported its success at its Cape Station project, a400 MW project in Beaver County, Utah, as well as at its full-scale commercial pilot, Project Red, in northern Nevada and made possible through a 2021 partnership with Google.

Galvanize Climate Solutions, John Arnold, Liberty Mutual Investments, Marunouchi Innovation Partners, Mercuria, and Mitsubishi Heavy Industries also contributed to the round with existing investors Capricorn’s Technology Impact Fund, Congruent Ventures, DCVC, Elemental Excelerator, Helmerich & Payne, and Impact Science Ventures.

“The energy trilemma is one of the defining global challenges of our time; how can we generate power that is affordable, reliable, and clean,” Houstonian John Arnold, founder of Centaurus Capital and co-chair of Arnold Ventures, says in the release. “Fervo has transformed geothermal into a scalable carbon-free resource ready to meet the moment.”

The fresh funding, according to the company, will go toward Fervo’s work in Cape Station, that is slated to begin delivering clean electricity to the grid in 2026.

“Fervo’s approach to geothermal development leverages leading-edge subsurface, drilling, and completions expertise and techniques Devon has been honing for decades,” David Harris, chief corporate development officer and executive vice president at Devon, says in the release. “We look forward to deepening our partnership with Fervo to capture the full value of Fervo’s first-mover advantage in geothermal and the adjacencies to Devon’s core business.”

In 2022, Fervo raised a $138 million series C round to support the completion of power plants in Nevada and Utah and evaluate new projects in California, Idaho, Oregon, Colorado, and New Mexico, as well as in other countries. This latest investment brings the company's total funds raised to $431 million since its inception in 2017, according to Crunchbase.

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This article originally ran on EnergyCapital.

A Houston energy professional shares his advice for those looking for a job in climate tech. Photo via Getty Images

5 tips for people looking to expand their career into climate tech, according to this Houston expert

guest column

If hard times build strong people, then extreme weather events build strong climate tech ecosystems. Nobody knows this conventional wisdom better than Houston.

The past six years alone have seen the second costliest natural disaster in United States history (Hurricane Harvey), the longest power outage in Texas history (Winter Storm Uri), and this June, a heat wave that pushed the ERCOT power grid to record levels.

Combine our ever more volatile climate with a post-COVID-19 reckoning of what it means to work for what you believe in, and you get a recipe for the most significant workforce shift the world has ever seen. This workforce shift rules in favor of climate tech, and it will largely target those who’ve grown up, come of age and started their careers in the midst of this increasing volatility. Climate tech will no longer be considered a standalone industry; it will be baked into all existing industries, and those that don’t accept it will die.

I’m proud to be a climate optimist, but I’m also a realist. The truth is no matter what we do, our volatile climate is going to get worse before it gets better. But if extreme weather events build strong climate tech ecosystems, I can live with that.

To students and young professionals considering a jump into climate tech: There is no better place to be right now. Here are five things to keep in mind as you make that jump.

1. Meet as many people from diverse backgrounds working on as many different things as you can. You will likely feel awkward at first, especially if you don’t naturally gravitate toward conferences and happy hours. At the risk of sounding trite, just treat every stranger like a friend you haven’t met yet. Some of us could probably use more friends anyway.

2. The advice in the self-help book How to Win Friends and Influence People, originally published in 1936, is timeless. Possibly the most useful (and most obvious) point is this: Remember that a person’s name is to that person the sweetest and most important sound in any language. Whenever possible, repeat your new friends’ names when you meet them. Especially if you’re seeking a business development, sales or other external-facing role, perfecting this point should be your Holy Grail.

3. Depending on how new you are to energy and climate tech, you’ll hear lots of unfamiliar lingo. Ask questions, take note of what you still don’t get, and do your best to fill in the gaps on the side. Eventually, acronyms will become your best friend. For example: Have you seen what the ITC and the PTC from the IRA will do to the LCOE of PV according to NREL? IYKYK.

4. Coachability is key. You may feel like you’re getting rejected 99 percent of the time, but the way you respond to and learn from those experiences will ensure the other one percent makes all the difference. At the end of the day, climate tech is so vast that it’s impossible to become an expert in everything, and that’s okay. We may not know what’s going on 70 percent of the time, but I’ll take a .300 batting average any day.

5. It may be impossible to become an expert in everything, but you should proactively learn as much as you can, especially given how quickly the ecosystem is expanding. If you’re not embarrassed by how little you knewone year ago, two years ago or even five years ago, then you’re probably not trying hard enough.

These are only five of my takeaways over the past few years and I’ll be the first to admit that I have a long way to go in implementing them. In a way, that’s what makes this journey what it is. I just can’t wait to see what we build.

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Ryan Davidson is business development lead for CalWave Power Technologies, a California-based company and Greentown Houston member that's focused on converting ocean waves’ hydrokinetic energy into reliable electricity. This article originally ran on EnergyCapital.

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Meta to bring $115 million AI data center training initiative to Houston

ai workforce

Meta and Associated Builders and Contractors have entered into a partnership to invest $115 million in training programs for the construction of AI data centers, with a portion of the project launching in Houston.

The companies announced June 8 that they would open America’s Workforce Academies at ABC chapter training centers in Houston; Indianapolis; Baton Rouge, Louisiana; and Columbus, Ohio.

The academies will offer career readiness and safety training, plus five weeks of hands-on education. Participants who complete the program will be granted a job offer from contractors working on Meta projects.

“The AI revolution is bringing change but also historic opportunities,” Dina Powell McCormick, Meta president and vice-chairman, said in a news release. “Skilled workers electrified rural America one pole at a time. They manned the factories that built the arsenal that won World War II. Now a new generation will pour the foundations and lay the fiber that secures American strength in this new age.”

Overall, the Meta and ABC aim for the academies to build a more sustainable pipeline of skilled construction workers and ensure safety and job readiness for the surging number of data center projects underway.

“This new program is an innovative talent solution that is a critical part of addressing the construction industry’s ongoing workforce shortage and creates an accelerated, new-entrant strategy for job seekers ... The sustained demand for data center construction technicians means the industry needs an all-of-the-above approach to address this shortage and grow the construction talent pool,” Michael Bellaman, ABC president and CEO, added in the release.

In Texas, Meta, the parent company of Facebook and Instagram, has launched or broken ground on data centers in El Paso, Fort Worth and Temple. The company announced in March that it planned to grow its El Paso Data center by 1 gigawatt, representing more than a $10 billion investment.

Apart from Meta, Texas has attracted data center development to power other giants like Google and Amazon in recent years. In turn, Texas has been predicted to become the biggest data center market. Commercial real estate services provider JLL reported this spring that the state could topple Northern Virginia as the world’s largest data-center market by 2030. Similarly, CBRE predicted that Houston's data center capacity could double by 2028. Read more here.

New Houston biotech co. lands $30M for pulmonary fibrosis drug

drug money

Most of us can claim a scar or two on our bodies. But when scarring develops inside the body, it’s known as a fibrotic disorder. A freshly launched Houston company, Oorja Bio Inc., is working on a treatment that can help to repair cells and reduce the damage wrought by the growth of fibrotic tissue in patients.

Late last month, Oorja Bio hit the scene with a pair of big announcements. Not only has the company raised a $30 million Series A thanks to founding investor California-based Westlake BioPartners, but it has also already paved the way for a Phase 2 study to take place this year.

Oorja Bio received Investigational New Drug (IND) clearance from the U.S. Food and Drug Administration (FDA), allowing the company to test its treatment in patients with idiopathic pulmonary fibrosis (IPF), a scarring of the lung tissue. IPF affects more than 150,000 adults in the United States and can result in a range of symptoms from shortness of breath to organ failure and death as it progresses.

Oorja Bio’s lead drug candidate, ORJ-001, was shown in a Phase 1 in-human trial to demonstrate “therapeutically relevant exposure and favorable tolerability” in 64 healthy adult volunteers in whom it was administered daily or weekly, according to a news release. Pre-clinical studies of ORJ-001 showed durable target tissue engagement and biomarker activity in bleomycin-induced lung fibrosis.

Administered subcutaneously, ORJ-001 is intended to improve and even restore function in cells that can reduce the signaling that causes IPF. It stops advancement of IPF and also allows for tissue repair. Currently available treatments for the disease can slow the development of IPF down, but do not address the declining lung function that’s inherent in its progression.

“The clinical and preclinical results from our studies to date give us confidence that ORJ-001 represents a novel treatment approach with the potential to repair and reverse fibrosis and modify disease progression in IPF,” Dr. Janethe Pena, CMO of Oorja Bio, said in the release.

“Our team is energized to deliver on our goal of redefining the future of fibrotic diseases, beginning with ORJ-001,” CEO and founder Sujay Kango added. “As we advance ORJ-001 in the clinic, we are embracing the paradigm shift in our biological understanding of IPF pathology that aligns with the central role of the alveolar epithelium. ORJ-001 was designed with this biology in mind and may provide, for the first time, a therapeutic intervention that repairs and reverses fibrosis and promotes disease modification.”

Most patients live only three to five years following their IPF diagnosis. Soon, ORJ-001 and Oorja Bio could give them a fighting chance.

Axiom Space tops $525M in oversubscribed round, announces Swiss subsidiary

funding boost

Axiom Space tacked on an additional $175 million to a previously announced capital raise, bringing the oversubscribed round to a total of more than $525 million.

Axiom shared in February that it had secured $350 million in a financing round led by Type One Ventures and Qatar Investment Authority. In the latest release from the company, Axiom reports that Japan-based MUFG Bank Ltd. joined the round as a new investor, in addition to continued participation from existing backers.

The funding will go toward developing the company's commercial space station, known as Axiom Station, and the production of its Axiom Extravehicular Mobility Unit (AxEMU) under its NASA spacesuit contract.

“Investor interest in this round outpaced what we set out to raise, which speaks to the moment we’re in,” Jonathan Cirtain, CEO and president of Axiom Space, said in the news release. “Our partners see what is possible in low-Earth orbit, and they see who is positioned to lead it.”

Axiom announced last month that it planned to open a Japanese subsidiary July 1. Earlier this week, it also shared plans to establish Axiom Space Switzerland, a wholly owned subsidiary based in Lucerne that is also expected to begin operations this summer.

The Switzerland subsidiary aims to establish Axiom's presence in Europe and help it partner with the European Space Agency and other space organizations and companies on the continent.

“Europe is a founding leader in the creation of the commercial space economy, and Switzerland is uniquely positioned to convene the government agencies, research institutions, and industrial entities that will shape its next decade,” Cirtain added in a separate release. “Axiom Space Switzerland facilitates the scaling of development and deployment of the infrastructure that will succeed the International Space Station.”

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