2 Houston startups join Greentown Labs' BIPOC-led accelerator program

seeing green

From potato-starch-based bioplastics startups to companies developing carbon-coated silicon anodes, here's who's joining Greentown Labs and Browning the Green Space's ACCEL program. Photo via browningthegreenspace.org

Greentown Labs and Browning the Green Space announced the newest cohort for its Advancing Climatetech and Clean Energy Leaders Program, or ACCEL, which works to advance BIPOC-led startups in the climatetech space.

Two Houston companies and one from Austin are among the eight startups to be named to the 2025 group.

“The startups selected for the third ACCEL cohort represent a phenomenal range of energy and climatetech innovations, which underscores our belief that everyone and many solutions must play a role in our community’s collective decarbonization efforts,” Georgina Campbell Flatter, Greentown’s new CEO, said in a release. “We’re proud to welcome these entrepreneurs to our community and eager to see all they’ll achieve throughout the program and beyond!”

Each of the early-stage startups within the cohort will receive $25,000 in non-dilutive grant funding and participate in the year-long program focused on product and technology development, market development, fundraising and management, and team development, according to Greentown. The curriculum is led by VentureWell, a nonprofit with expertise in venture development in climatetech.

The Houston companies include:

Carbonext, founded by Olanrewaju Tanimola. The company is leveraging its proprietary, off-the-shelf 3D-graphene technology to develop integrated solutions with carbon-coated silicon anodes to address challenges in the graphite ecosystem, as well as lithium-battery anodes.
PLASENE, founded by Sohel Shaikh, Alper Gulludag and Romolo Raciti. The company offers an innovative platform that converts plastic waste into liquid fuel and low-carbon hydrogen through its proprietary catalysts and modular, scalable, pre-engineered units

The remaining six companies are:

Inductive Robotics, founded in Austin by Madhav Ayyagari and David Alspaugh. The startup deploys autonomous robots that deliver EV charging directly to parked vehicles in commercial parking facilities, using a subscription-based model.
Andros Innovations, founded in Cambridge, Massachusetts by Laron Burrows. The startup has developed a reactor that produces ammonia more cheaply, cleanly and safely than traditional methods do.
FAST Metals, founded in Worcester, Massachusetts by Sumedh Gostu and Anthony Staley. It has developed a hydrometallurgical-recovery process capable of extracting iron, aluminum, scandium, titanium, and other rare-earth elements from industrial tailings.
Respire Energy, founded in Boston by Dave Hsu, Xiaowei Teng, and Candy Wong. The energy storage startup has developed a safe, low-cost, and long-duration metal-air battery designed for microgrids.
Tato Labs, founded in Brooklyn by Mecca McDonald and Mia Dunn. It is developing scalable, innovative, bioplastic products and packaging solutions that leverage potato starch, protect and preserve the natural ecosystem, and minimize plastic waste.
Thola, founded in Portland, Maine, by Nneile Nkholise and Lerato Takana. The company provides an on-demand marketplace for commercial-building sustainability and safety management, with a mission to decarbonize old buildings.

ACCEL is supported by the Massachusetts Clean Energy Center (MassCEC), Shell, Equinor, the Growth Capital Division of MassDevelopment, Microsoft and the Barr Foundation.

The accelerator has supported 13 early-stage startups since it was founded in 2023, resulting in $325,000 in grant funding. Houston companies have been represented in each cohort. Click here to see the 2024 cohort and here to see the inaugural 2023 cohort.

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A handful of startups will be selected for the third year of the ACCEL program put on by Greentown Labs and Browning the Green Space. Photo via greentownlabs.com

Greentown launches 3rd round of collaborative accelerator for energy tech founders of color

browning the green space

For the third year, Greentown Labs and Browning the Green Space have opened applications for ACCEL, a climatetech accelerator designed to bolster BIPOC-led companies.

The program, which is a year-long commitment providing opportunities across funding, networking connections, resources, and more, has applications open until January 7. Each selected company will receive non-dilutive grant funding up to $25,000, trainings from VentureWell, a desk and membership at Greentown Houston or Boston locations, a BGS membership, and more.

A handful of startups will be selected for the program, which is looking for companies at the two to four Technology Readiness Level (TRL ) stage with a technology solution across agriculture, buildings, electricity, manufacturing, resiliency and adaptation, and transportation sectors.

“ACCEL has been amazing," Chidalu Onyenso, founder of Cambridge, Massachusetts-based EarthBond, a member of the 2022 cohort, writes on the website. "I’ve really enjoyed the membership and programming. I think it’s fantastic—if I met another Black or Brown founder focused on climatetech, I’d tell them to apply to this program, 100 percent.”

Earlier this year, the program — which is supported by the Massachusetts Clean Energy Center, Microsoft's Climate Innovation Fund, Equinor, Barr Foundation — named seven companies to its second cohort and six to its inaugural batch in 2022. The 13 companies across two cohorts so far have received $325,000 in grant funding from the program.

"These BIPOC-led startups are developing climate technologies that will lead us to a more equitable and sustainable future," MassCEC CEO Dr. Emily Reichert, the former CEO of Greentown, said of the second cohort in a news release. "We want ALL climatetech innovators and entrepreneurs to thrive here in Massachusetts. We are proud to support the ACCEL accelerator, created and led by Greentown Labs and Browning the Green Space. The ACCEL program is helping us build a more diverse innovation ecosystem by breaking down barriers and expanding opportunities."

Interested and qualifying companies can apply online.

Houston energy transition folks: Here's what to know this week. Photo via Getty Images

3 things to know: Houston energy co. rings closing bell, events to know about, and more

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Editor's note: It's a new week — start it strong with three quick things to know in Houston's energy transition: events not to miss, a win for an energy startup, and more.

Events not to miss

Add these events to your radar:

November 30 - Carbon to Value Initiative Year 3 Final Showcase will be streamed online. Register.
December 4 - Pumps & Pipes Annual Event is Houston's premier innovation gathering bringing together cross-industry leaders for engaging discussions and top tier networking opportunities. Register.
December 7 - Greentown Labs Investor Speaker Series: Both Sides of the Coin will host a thoughtful fireside chat followed by networking. Register.

Houston startup rings NYSE closing bell

A Houston company got to take the national stage by ringing the closing bell at the New York Stock Exchange, and for Katie Mehnert, founder of ALLY Energy, it was a chance to reflect on the progress the industry as a whole has progressed.

"As I stood on the platform at the world’s largest stock exchange to ring the closing bell, surrounded by 130 people from across the energy industry, I saw it clearly: how the private sector will play a major role in getting us to an era of net zero," Mehnert writes in her guest column. Read the full piece here.

Deadline not to miss: ACCEL

Advancing Climatetech and Clean Energy Leaders Program, or ACCEL, has opened applications for it's second cohort. The program — from Greentown Labs and Browning the Green Space — provides access to funding, networking connections, incubation space, mentorship, resources, and opportunities for energy tech founders of color for a year.

“ACCEL is one of the most impactful, meaningful programs we’ve run to date,” Greentown Labs CEO and President Kevin Knobloch says in a news release. “We are eager to expand upon the great success and momentum of year one, and to welcome another incredible cohort of BIPOC-led startups that are developing much-needed climatetech solutions. We’re equally committed to helping these companies accelerate and deploy their solutions, while also helping to build a more diverse, inclusive climatetech workforce—ACCEL sits at the nexus of those two critical efforts.” Read more about the program.

ACCEL has opened applications for next year. Photo via Getty Images

Applications open for inclusive cleantech accelerator

appy now

Calling all cleantech startups founded by innovators of color — an inclusive accelerator program is now accepting applications.

The program, supported by the Massachusetts Clean Energy Center, accelerated six startups this year — Active Surfaces, DrinKicks, EarthBond, florrent, frakktal, and SpadXTech.

“The ACCEL Program directly aligns with our mission to ensure that climatetech jobs and wealth creation opportunities are available to all residents of the Commonwealth,” Emily Reichert, CEO at MassCEC and former CEO at Greentown, says in the release. “We are excited to see the second round of this important program, with our Equity Workforce Fund support fostering a partnership between Greentown Labs and Browning the Green Space aimed at accelerating the growth of minority and women business enterprises in Massachusetts.”

ACCEL, which doles out $25,000 in non-dilutive grant funding to each participant, is also supported by Boston-based Barr Foundation and provides programming from VentureWell, a nonprofit with expertise in climatetech.

“Through our partnership with Greentown and VentureWell, we are able to put our respective strengths together to create an ambitious program to bolster founders of color in climatetech and propel innovations that benefit communities most impacted by climate change,” Kerry Bowie, executive director and president of Browning the Green Space, says in the release. “Opening applications for Year 2 of ACCEL is an important milestone in strengthening critical support for traditionally excluded entrepreneurs in our communities.”

Applications for ACCEL are open until January 5, 2024. While entrepreneurs from anywhere can apply, preference will be given to applicants in Greater Boston and Greater Houston, where Greentown’s incubators are located.

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Houston robotics company partners with Marathon Petroleum to scale fleet

robot alliance

Houston- and Boston-based Square Robot Inc. has announced a partnership with downstream and midstream energy giant Marathon Petroleum Corp. (NYSE: MPC).

The partnership comes with an undisclosed amount of funding from Marathon, which Square Robot says will help "shape the design and development" of its submersible robotics platform and scale its fleet for nationwide tank inspections.

“Marathon’s partnership marks a major milestone in our mission to transform industrial tank inspection,” David Lamont, CEO of Square Robot, said in a news release. “They recognize the proven value of our robotic inspections—eliminating confined space entry, reducing the environmental impact, and delivering major cost efficiencies all while keeping tanks on-line and working. We’re excited to work together with such a great company to expand inspection capabilities and accelerate innovation across the industry.”

The company closed a $13 million series B last year. At the time of closing, Square Robot said it would put the funding toward international expansion in Europe and the Middle East.

Square Robot develops autonomous, submersible robots that are used for storage tank inspections and eliminate the need for humans to enter dangerous and toxic environments. Its newest tank inspection robot, known as the SR-3HT, became commercially available and certified to operate at a broader temperature range than previous models in the company's portfolio this fall.

The company was first founded in the Boston area in 2016 and launched its Houston office in 2019.

$3B acquisition of hazardous waste co. tops latest energy news to know

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Editor's note: The top energy transition news for the month includes Veolia's $3 billion Clean Earth acquisition and ERCOT's new $9.4 billion project. Here are the five most-read EnergyCapitalHTX stories from December 1-16, 2025:

1. Hazardous waste company with Houston presence to make $3B acquisition

Veolia will acquire Clean Earth. Photo courtesy of Veolia/LinkedIn

Veolia, a Boston-based company with major operations in Texas, is purchasing hazardous-waste company Clean Earth from Enviri as part of a $3 billion deal. Veolia is a private water operator, technology provider and hazardous waste and pollution treatment company that operates a large hazardous waste treatment and incineration facility in Port Arthur. Hazardous waste treatment is a growing sector as the clean energy, semiconductor manufacturing, healthcare and pharmaceutical industries generate high levels of waste that need to be handled safely. Continue reading.

2. Federal judge strikes Trump order blocking wind energy development

A federal judge has thrown out President Trump's executive order blocking wind energy development, calling it 'arbitrary and capricious.' Photo by Moritz Lange via Unsplash.

In a win for clean energy and wind projects in Texas and throughout the U.S., a federal judge struck down President Donald Trump’s “Day One” executive order that blocked wind energy development on federal lands and waters, the Associated Press reports. Judge Patti Saris of the U.S. District Court for the District of Massachusetts vacated Trump’s executive order from Jan. 20, declaring it unlawful and calling it “arbitrary and capricious.” Continue reading.

3. Air Liquide and Hyundai ink partnership to scale hydrogen economy

Air Liquide and Hyundai agreed to expand hydrogen refuelling networks, storage capacity and more at a meeting in Seoul last week. Photo courtesy Air Liquide.

Air Liquide, which maintains its U.S. headquarters in Houston, and South Korea-based Hyundai Motor Group are expanding their strategic partnership to accelerate the growth of the global hydrogen ecosystem. The renewal of the companies’ Memorandum of Understanding (MoU) was announced at the Hydrogen Council CEO Summit in Seoul last week. Together, the companies will work to scale hydrogen production, storage, transportation and utilization across Europe, Korea and the United States with a concentration on heavy-duty transport, logistics and public transportation. Continue reading.

4. ERCOT approves $9.4B project to improve grid, meet data center demand

ERCOT plans to build a “super highway” of new transmission lines to boost grid reliability. Photo via Getty Images

The Electric Reliability Council of Texas, which manages the electric grid for 90 percent of Texans, is undertaking a $9.4 billion project to improve the reliability and efficiency of statewide power distribution. The initiative comes as ERCOT copes with escalating demand for electricity from data centers and cryptocurrency-mining facilities. Continue reading.

5. Reliant partners to expand Texas virtual power plant and home battery use

Reliant is offering new incentives to boost NRG's virtual power plant network in Texas. Photo via goodleap.com.

Houston’s Reliant and San Francisco tech company GoodLeap are teaming up to bolster residential battery participation and accelerate the growth of NRG’s virtual power plant (VPP) network in Texas. Through the new partnership, eligible Reliant customers can either lease a battery or enter into a power purchase agreement that incentivizes users by offering monthly performance-based rewards for contributing stored power to the grid. Continue reading.

Eclipse Energy lands Weatherford investment to scale clean hydrogen tech

clean energy collab

Oil and gas giant Weatherford International (NASDAQ: WFRD) has made a capital investment for an undisclosed amount in Eclipse Energy as part of a collaborative partnership aimed at scaling and commercializing Eclipse's clean fuel technology.

According to a release, joint projects from the two Houston-based companies are expected to launch as soon as January 2026. The partnership aims to leverage Weatherford's global operations with Eclipse Energy's pioneering subsurface biotechnology that converts end-of-life oil fields into low-cost, sustainable hydrogen sources.

“We strongly believe the subsurface is the most overlooked climate asset,” Prabhdeep Singh Sekhon, CEO of Eclipse Energy, said in the release. “This partnership demonstrates how traditional oilfield expertise and frontier biotechnology can come together to transform the energy transition. Weatherford’s global reach and deep technical knowledge will accelerate our ability to scale our low-carbon technology rapidly and cost-effectively.”

Eclipse Energy, previously known as Gold H2, completed its first field trial this summer, demonstrating subsurface bio-stimulated hydrogen production. According to the company, its technology could yield up to 250 billion kilograms of low-carbon hydrogen, and it could also extend "beyond hydrogen, laying the foundation for the next generation of subsurface clean energy fuels."

Last month, Eclipse Energy won in the Energy Transition Business category at the 2025 Houston Innovation Awards. The company closed an $8 million series A this year and has plans to raise another round in 2026.

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