Q&A: Houston organization empowers science entrepreneurs paving the way to a low-carbon future

THE VIEW FROM HETI

Jeremy Pitts of Activate joins the Houston Energy Transition Initiative for a Q&A. Photo via LinkedIn

Founded in 2015, Activate Global Inc. is a 501(c)3 nonprofit organization that partners with US-based funders and research institutions to support scientists at the outset of their entrepreneurial journey by providing personalized expertise, tools, and resources that may otherwise be inaccessible. The organization recently launched its fifth community in Houston, and just closed the application window for the 2024 Activate Fellowship Cohort.

We recently connected with energy industry veteran and Activate Houston Managing Director Jeremy Pitts to learn more about how Activate is empowering scientists and engineers as they pave the way to a low-carbon future.

HETI: Activate was founded in 2015 and has established fellowship programs in Silicon Valley, Boston, New York, and a remote Anywhere Community. Why was Houston the next logical choice for an Activate Community?

Jeremy Pitts: There is no doubt that Houston is going to be a major player in the energy transition, so it’s a logical place for Activate to be as we do our part to help bring ground-breaking technology out of the lab and deploy it to solve the world’s biggest challenges.

Houston is already the best place to scale a company working on the types of hard tech solutions that Activate focuses on. Houston has the talent, capital, and resources to build and deploy things at the scale needed to have a global impact. There is a good chance that many of our current Activate companies and alumni will end up in Houston as they pursue their scale-up plans. Activate alum Tim Latimer and Fervo Energy are great examples of this.

Houston is also an interesting fit for Activate as we believe we can fill a gap in the current ecosystem by providing support for entrepreneurs at the earliest stages of their journey. By providing funding and support, we can keep those entrepreneurs in Houston as opposed to moving to the coasts. We are hopeful that not only can we directly support a small number of the most promising entrepreneurs, but we can indirectly support many more by creating an ecosystem where early-stage capital starts to find its way to Houston to support these revolutionary and impactful technologies.

HETI: Activate Communities work closely with climate tech programs at leading colleges and universities, including UC Berkeley, U Mass Boston, and Columbia University. What can you tell us about Activate Houston’s plans for collaboration with area colleges and universities?

JP: Activate’s goal is to be as inclusive as possible. One of our main goals is to find fellows who we can have as big of an impact on as possible, potentially being the difference between whether they are successful or not. To that end, we plan to partner and engage with all of the research institutions across Houston and the surrounding areas. In just our first few months of being on the ground in Houston and recruiting for our first cohort, we have already engaged with Rice, UH, Prairie View A&M, TSU, Texas A&M, UT, and the Texas Medical Center. We have also begun outreach and preliminary conversations with institutions outside of the Houston area, like UT Dallas, SMU, Baylor, UTEP, etc. Our goal is to find the most promising entrepreneurs and the most impactful technologies that we can help and support, regardless of where they come from.

We will also be looking to engage with some of these institutions to make resources available to our fellows to support the research they are doing once in the Activate program. These conversations are in the early stages, but the facilities at UH Technology Bridge and TMC’s Innovation Factory are great examples of how the Houston ecosystem can support our fellows.

HETI: How do fellowships like Activate differ from traditional accelerator programs and why are they such an important component of the energy transition?

JP: Accelerators in general are a great resource for entrepreneurs to quickly learn the fundamentals around building a company and gain access to a network of investors, mentors, and partners that they would have trouble accessing on their own.

While Activate has a lot of overlap with accelerators in terms of what we provide, we classify ourselves as a fellowship and not an accelerator. The reasons for this primarily lie in the fact that we are a non-profit. This allows us to do a few things different from traditional accelerators. First, our program does not charge any fees or equity. Because our success is not tied to the financial outcomes of the companies, we are able to take much bigger risks in terms of the technology we support and we are also able to take a fellow first approach, as sometimes the best outcome for the fellow as a person is not the best financial outcome for the company. Second, we are much more patient, offering a full two years of support for our fellows and continuing to support our alumni community after they have left the program.

Activate’s unique fellowship program can play an essential role because many of the technologies and breakthroughs necessary to solve the world’s biggest challenges are really hard. It can take a long time to develop these technologies and often they are too risky and unproven at the early stages to be able to attract the capital they need to turn the technology into a commercial solution. Activate can support these hard technologies and provide a two-year safety net for our fellows as they work through those early challenges and progress their solution to a point that the private markets will support the business coming out of our program. We have been quite successful with this approach thus far, as the 145 companies we have created have raised nearly $1.4B in follow-on funding, representing a 23X multiplier on the funds Activate has directly deployed to support the fellows.

HETI: You’re the co-founder of Greentown Labs, now the nation’s biggest climate tech incubator. How does that experience help in your new role as MD at Activate Houston?

JP: The biggest takeaway for me from my time building Greentown is the power of community. Early-stage deep tech founders face monumental challenges. Having a community of like-minded individuals nearby who are facing their own similar challenges and serve as both a support network and a sounding board to help work through those challenges can be the difference between success and failure. I hope to leverage those learnings to really focus on Activate Houston being an incredibly strong community where the founders can lean on each other, and me, for the support they need.

In addition, Greentown also serves as a gathering place for bringing the larger climate community together, which is so vital in pushing forward the energy transition. In the early days of Greentown, those events happened on an almost ad hoc basis, as there wasn’t previously a place for people interested in climate to gather. Greentown has changed a lot over the years – the facilities are quite a bit nicer than where we started – but it has done an amazing job continuing to fill that role as the center of the climate ecosystem and bringing together a community of like-minded individuals. Anyone who attended the recent Greentown Climatetech Summit and experienced the standing-room-only crowds of passionate people can attest to that. Certainly, Greentown already fills that role for Houston and does it well, but my experience with the power of community will lead me to lean into Houston’s climate community and encourage our fellows to do the same, to be active members in strengthening the entire climate and innovation ecosystem in Houston. All boats rise together in the rising sea that is Houston’s climate and innovation ecosystem.

HETI: What are you most looking forward to with the upcoming launch of Houston’s 2024 Cohort?

JP: I’m looking forward to getting started – welcoming our first cohort into Houston and showing the rest of the country that Houston can hold its own when it comes to hard tech and world-changing innovation.

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This article originally ran on the Greater Houston Partnership's Houston Energy Transition Initiative blog. HETI exists to support Houston's future as an energy leader. For more information about the Houston Energy Transition Initiative, EnergyCapitalHTX's presenting sponsor, visit htxenergytransition.org.

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Houston geothermal company raises $97M Series B

fresh funding

Houston-based geothermal energy startup Sage Geosystems has closed its Series B fundraising round and plans to use the money to launch its first commercial next-generation geothermal power generation facility.

Ormat Technologies and Carbon Direct Capital co-led the $97 million round, according to a press release from Sage. Existing investors Exa, Nabors, alfa8, Arch Meredith, Abilene Partners, Cubit Capital and Ignis H2 Energy also participated, as well as new investors SiteGround Capital and The UC Berkeley Foundation’s Climate Solutions Fund.

The new geothermal power generation facility will be located at one of Ormat Technologies' existing power plants. The Nevada-based company has geothermal power projects in the U.S. and numerous other countries around the world. The facility will use Sage’s proprietary pressure geothermal technology, which extracts geothermal heat energy from hot dry rock, an abundant geothermal resource.

“Pressure geothermal is designed to be commercial, scalable and deployable almost anywhere,” Cindy Taff, CEO of Sage Geosystems, said in the news release. “This Series B allows us to prove that at commercial scale, reflecting strong conviction from partners who understand both the urgency of energy demand and the criticality of firm power.”

Sage reports that partnering with the Ormat facility will allow it to market and scale up its pressure geothermal technology at a faster rate.

“This investment builds on the strong foundation we’ve established through our commercial agreement and reinforces Ormat’s commitment to accelerating geothermal development,” Doron Blachar, CEO of Ormat Technologies, added in the release. “Sage’s technical expertise and innovative approach are well aligned with Ormat’s strategy to move faster from concept to commercialization. We’re pleased to take this natural next step in a partnership we believe strongly in.”

In 2024, Sage agreed to deliver up to 150 megawatts of new geothermal baseload power to Meta, the parent company of Facebook. At the time, the companies reported that the project's first phase would aim to be operating in 2027.

The company also raised a $17 million Series A, led by Chesapeake Energy Corp., in 2024.

Houston expert discusses the clean energy founder's paradox

Guest Column

Everyone tells you to move fast and break things. In clean energy, moving fast without structural integrity means breaking the only planet we’ve got. This is the founder's paradox: you are building a company in an industry where the stakes are existential, the timelines are glacial, and the capital requires patience.

The myth of the lone genius in a garage doesn’t really apply here. Clean energy startups aren’t just fighting competitors. They are fighting physics, policy, and decades of existing infrastructure. This isn’t an app. You’re building something physical that has to work in the real world. It has to be cheaper, more reliable, and clearly better than fossil fuels. Being “green” alone isn’t enough. Scale is what matters.

Your biggest risks aren’t competitors. They’re interconnection delays, permitting timelines, supply chain fragility, and whether your first customer is willing to underwrite something that hasn’t been done before.

That reality creates a brutal filter. Successful founders in this space need deep technical knowledge and the ability to execute. You need to understand engineering, navigate regulation, and think in terms of markets and risk. You’re not just selling a product. You’re selling a future where your solution becomes the obvious choice. That means connecting short-term financial returns with long-term system change.

The capital is there, but it’s smarter and more demanding. Investors today have PhDs in electrochemistry and grid dynamics. They’ve been burned by promises of miracle materials that never left the lab. They don't fund visions; they fund pathways to impact that can scale and make financial sense. Your roadmap must show not just a brilliant invention, but a clear, believable plan to drive costs down over time.

Capital in this sector isn’t impressed by ambition alone. It wants evidence that risk is being retired in the right order — even if that means slower growth early.

Here’s the upside. The difficulty of clean energy is also its strength. If you succeed, your advantage isn’t just in software or branding. It’s in hardware, supply chains, approvals, and years of hard work that others can’t easily copy. Your real competitors aren’t other startups. They’re inertia and the existing system. Winning here isn’t zero-sum. When one solution scales, it helps the entire market grow.

So, to the founder in the lab, or running field tests at a remote site: your pace will feel slow. The validation cycles are long. But you are building in the physical world. When you succeed, you don’t have an exit. You have a foundation. You don't just have customers; you have converts. And the product you ship doesn't just generate revenue; it creates a legacy.

If your timelines feel uncomfortable compared to software, that’s because you’re operating inside a system designed to resist change. And let’s not forget you are building actual physical products that interact with a complex world. Times are tough. Don’t give up. We need you.

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Nada Ahmed is the founding partner at Houston-based Energy Tech Nexus.

Houston maritime startup raises $43M to electrify cargo vessels

A Houston-based maritime technology company that is working to reduce emissions in the cargo and shipping industry has raised VC funding and opened a new Houston headquarters.

Fleetzero announced that it closed a $43 million Series A financing round this month led by Obvious Ventures with participation from Maersk Growth, Breakthrough Energy Ventures, 8090 Industries, Y Combinator, Shorewind, Benson Capital and others. The funding will go toward expanding manufacturing of its Leviathan hybrid and electric marine propulsion system, according to a news release.

The technology is optimized for high-energy and zero-emission operation of large vessels. It uses EV technology but is built for maritime environments and can be used on new or existing ships with hybrid or all-electric functions, according to Fleetzero's website. The propulsion system was retrofitted and tested on Fleetzero’s test ship, the Pacific Joule, and has been deployed globally on commercial vessels.

Fleetzero is also developing unmanned cargo vessel technology.

"Fleetzero is making robotic ships a reality today. The team is moving us from dirty, dangerous, and expensive to clean, safe, and cost-effective. It's like watching the future today," Andrew Beebe, managing director at Obvious Ventures, said in the news release. "We backed the team because they are mariners and engineers, know the industry deeply, and are scaling with real ships and customers, not just renderings."

Fleetzero also announced that it has opened a new manufacturing and research and development facility, which will serve as the company's new headquarters. The facility features a marine robotics and autonomy lab, a marine propulsion R&D center and a production line with a capacity of 300 megawatt-hours per year. The company reports that it plans to increase production to three gigawatt-hours per year over the next five years.

"Houston has the people who know how to build and operate big hardware–ships, rigs, refineries and power systems," Mike Carter, co-founder and COO of Fleetzero, added in the release. "We're pairing that industrial DNA with modern batteries, autonomy, and software to bring back shipbuilding to the U.S."

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