Thomas Vagalis has spent his career asking one question: Why do some brands succeed online while others, selling nearly identical products, never break through?
That question has shaped every stage of his journey—from studying marketing in Aarhus, Denmark, to serving in the Royal Danish Life Guards, including a NATO deployment in Latvia on the alliance's eastern flank. It led him to build direct-to-consumer brands that have reached more than 50,000 customers across 30 European countries, launch and successfully exit two companies, earn two iF Design Awards, and be named to the Forbes 30 Under 30 Europe 2026 list.
It also inspired him to continue learning.
To challenge his assumptions, Vagalis enrolled in Harvard Business School Online's Digital Marketing Strategy and AI course to test the years of practical experience he built alongside his co-founder and CEO, August Callsen, against world-class business frameworks.
"August and I are largely self-taught operators—we built our skills by running real companies," Vagalis says. "At some point I wanted to pressure-test our instincts against the most rigorous frameworks I could find, and Harvard Business School is about as serious as that gets."
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Where Education Became Expertise
Vagalis's business education began at Aarhus Business College, where he specialized in global marketing, followed by an Academy Profession degree in Financial Management. But it was building businesses that transformed that education into expertise.
Today, his focus is TroisPommes Home, the Scandinavian outdoor furniture brand he co-founded and now serves as COO. The company is known for its weather-resistant materials, modular designs, and vacuum-compressed shipping technology, which reduces transport volume while making premium outdoor furniture more efficient to deliver across Europe.
Before founding TroisPommes Home, Vagalis co-founded Glàscy, a brand that made advanced Korean skincare and microneedling treatments more accessible for at-home use, and Moduri, a modular sofa company designed around comfort and efficient delivery. He and Callsen built and successfully exited both businesses within a year. Bootstrapping both ventures required disciplined decision-making, resourcefulness, and a focus on sustainable growth—principles that continue to shape how they build ventures today.
One of the most valuable lessons came not from launching a business, but from exiting one.
"Our first company sale taught me how much preparation matters: documentation, contracts, accounts, trademarks, design files, processes, and standard operating procedures all become far more important than you expect, and the quality of that structure is what makes a due diligence process smooth," Vagalis explains. "We carried that lesson straight into the sale of Moduri, and it made the whole thing dramatically more efficient."
That same instinct for systems over improvisation now shapes oOto.group, the international brand group Vagalis and Callsen are building to partner with founders, creators, and investors on the next generation of AI-native e-commerce brands.
Turning Instinct into Strategy
Digital Marketing Strategy and AI appealed to Vagalis because it focused on the world he already knew—direct-to-consumer brands, customer acquisition, retention, and performance measurement—through the experiences of leaders from companies such as e.l.f. Cosmetics, Adobe, OOFOS, and Pattern Brands. The greatest value was gaining frameworks to sharpen and validate his hands-on experience.
"The clearest lesson was the distinction between paid, owned, and earned media and—more importantly—the synergy between them," Vagalis says. "We had been using all three intuitively, but the course gave me a precise language and a strategic model for how they reinforce each other. That changed how we plan campaigns and how we value things like our iF DESIGN AWARDS, which are really earned-media trust assets, not just trophies."
The course also reshaped how Vagalis thinks about marketing performance. Lessons on budgeting, customer lifetime value, and the limitations of relying solely on return on investment encouraged a more strategic view of growth.
"It pushed me away from a narrow, last-click view of performance toward a longer-term picture of what a customer is actually worth—which, for a premium product people keep for years, is the only view that makes sense," Vagalis notes.
Thomas Vagalis and his co-founder, August Callsen.
From Frameworks to Results
That shift didn't stay theoretical. After completing the course, Vagalis rethought how his team evaluated marketing investment at TroisPommes Home.
Rather than increasing their marketing budget, the team reallocated it—placing greater emphasis on owned and earned media and judging performance against a longer time horizon rather than a single campaign’s immediate return.
"It wasn't about spending more," Vagalis says. "It was about investing with the right time horizon in mind."
Those frameworks have become central to how Vagalis approaches every new venture, informing everything from campaign planning to the value propositions he develops for new brands within oOto.group.
Learning at the Pace of Growth
What surprised Vagalis most was how quickly he could put new ideas into practice.
"I expected to take notes and apply things later," he says. "Instead, I was implementing ideas the same week I learned them. The biggest surprise was hearing leaders from large, established companies wrestle with the very same direct-to-consumer dynamics we live every day. It validated something we deeply believe: that the real opportunity often isn't inventing a new product, but reimagining a traditional industry in a smarter way."
For Vagalis, the flexibility of HBS Online was just as valuable as the course content itself. As COO of a fast-growing business, his schedule is shaped by product decisions, marketing strategy, meetings with suppliers and partners, and collaborating with his team across multiple time zones. The fully online format allowed him to fit learning around those demands, progressing through the course at his own pace without stepping away from the business.
"HBS Online wasn't an extra task competing with the business—it was fuel for it, because I could apply almost everything immediately," Vagalis says. "Energy comes from progress, and when learning and building feed each other, both move faster."
By the time he completed the course, the frameworks weren't just concepts; they had become part of his day-to-day decision-making.
Confidence, Not Just Credentials
Ask Vagalis about the program's greatest personal impact, and he doesn't point to a framework or marketing model. He points to a quiet, lasting confidence.
"As a self-taught founder, you carry a constant question in the back of your mind: Are my instincts actually sound, or have I just been lucky?" he says. "Seeing our hard-won intuitions hold up against Harvard-level frameworks—and getting sharper where they were fuzzy—settled that question for me. It gave me the conviction to think bigger and to commit to the long-term view, which is exactly the mindset I now bring to oOto."
That confidence was reinforced when Vagalis and Callsen were named to the Forbes 30 Under 30 Europe Class of 2026. Still, he's quick to put the recognition into perspective.
"I wouldn't claim that one course put us on a list—the recognition reflects years of building, and a lot of mistakes along the way," Vagalis says. "But HBS Online absolutely sharpened how clearly we could articulate what we do. In Forbes' screening conversations, they asked a great deal about how we build and grow brands, and being able to explain our strategy in rigorous, well-grounded terms certainly helped us tell that story with confidence."
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A Foundation for What's Next
Vagalis sees the program's influence extending well beyond his own decision-making. At its core, oOto.group is about sharing the playbooks he and Callsen have developed with the next generation of founders.
"As I keep moving from hands-on operator toward building teams and systems, having a strong, shared vocabulary for strategy makes me a better leader and a better partner," he says. "It also locked in a habit I intend to keep for life: never assuming I've learned enough."
His advice for busy entrepreneurs who are considering HBS Online is simple: "Honestly, do it—and if you're busy, HBS Online is built for exactly your situation."
What began as an opportunity to validate his instincts has become a framework for how he approaches every new venture.
“My one piece of advice is to treat it as applied, not academic—bring a real, live business problem to each module and implement as you go," he explains.
Vagalis reflects on the value of applying what he learned to his work in real time: "If you're running something demanding, that's actually your advantage, because you have a real laboratory to test every framework immediately, so the value compounds fast. For me, the return was tangible almost from the first week, and I'd recommend it to any operator without hesitation. Don't separate the learning from the doing—with HBS Online, you don't have to."
Looking back, Vagalis sees the experience as transformative in two ways.
"Professionally, it put a rigorous backbone under instincts we had earned the hard way, and gave August, our team, and me a shared language for the frameworks we now use to build companies," he says. "Personally, it gave me confidence and reinforced a belief I hold strongly: Recognition follows great work, so the smartest thing you can do is keep investing in the craft."
That commitment to continuous learning continues to shape what's next.
"The experience left me wanting more—I'm already planning to enroll in another HBS Online course because the format fits the way I work and the learning keeps compounding," Vagalis says. "We don't see milestones like Forbes 30 Under 30 as a finish line. We see them as a starting point, and HBS Online is part of how we make sure we're equipped to keep building something genuinely out of the ordinary."
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