Success·MillionairesMillennial investor behind Deroo, Scale AI and Figma made millions in his 20s—he s how Gen Z can spot a startup that’ll make them rich tooBy Orianna Rosa RoyleBy Orianna Rosa RoyleAssociate Editor, SuccessOrianna Rosa RoyleAssociate Editor, SuccessOrianna Rosa Royle is the Success associate editor at Fortune, overseeing careers, leadership, and company culture coverage.
She was previously the senior reporter at Management Today, Britain's longest-running publication for CEOs.
SEE FULL BIO EXCLUSIVE: Martin Mignot made his first millions before 30 thanks to backing Deroo before it became famous.
Now, he’s revealing how Gen Z can spot the next unicorn.Big Event Media/Getty Images for HumanX ConferenceMartin Mignot, the first investor in Deroo, became a millionaire before turning 30.
Now, as a partner at Index Ventures—the firm behind early bets on Figma, Scale AI, and Revolut—he exclusively s with Fortune the two strategies Gen Z can use to build wealth fast: become a founder or get in early at the right startup.
He also offers advice to spot the next unicorn.
Back when Deroo was a tiny London-based platform, with just a few restaurants in its repertoire, there was one man who believed it’d go on to become the multi-billion-dollar brand it is today: Martin Mignot.
“They had eight employees. They were in three London boroughs. Overall, they had a few 1000 users to date, so it was very, very early,” the 40-year-old investor exclusively tells Fortune.
“They didn’t have an app.
Their first website was pretty terrible and ugly, if I’m frank, but the dery experience was incredible.” In those days, he adds that the founder, Will Shu would get on a bike and spend his evenings doing deries himself to really understand the experience from the driver.
“When you see that level of insight and then of commitment and greed and intensity, it’s a no-brainer.” Today, Deroo is a $2.7 billion food dery giant, with over 160,000 restaurants on its app and millions of hungry customers around the world.
And it wasn’t the first and last investment success for Mignot and his team at Index Ventures.
Index Ventures, where he is a partner, has gone on to become the envy of Silicon Valley—reaping billions from being among the first to invest in startup hits Figma, Scale AI, and Wiz.
Meanwhile, Mignot has since led early investment in some of Europe’s most iconic startups, including Revolut, Trainline and Personio.
His bets paid off fast: By his late 20s, the millennial had cemented his reputation as one of the industry’s most notable investors—and made his first millions along the way.
For Gen Z who want to emulate his success, he advises: “It’s owning equity, that is the key.” The route to becoming a Gen Z millionaire: Own a company—or part of it Gen Z can take one of two paths to become millionaires in their 20s: become a founder or join a startup that you can invest in early, Mignot says.
Essentially, you need to own a company—or, at least, part of one. “Entrepreneurship is obviously the best way,” he explains, with the caveat that it’s also the more high-risk option of the two.
For the generation that grew up with phones in their hands, he says, building ducts has never been easier. Then they can leverage their Instagram and TikTok skills to sell them.
“You can use all of those amazing tools to code something, and then you can get massive reach if you’re if you’re clever and you’re creative—that’s where Gen Z has a huge advantage,” Mignot adds.
“That’s something that no other generation in history ever had.” “The other route, that is another great route, is joining amazing companies very early on,” Mignot says, while adding that Index has long been campaigning to make stock options more easily accessible to people, especially in Europe.
“That is a fantastic way to become wealthy,” he adds. “You won’t become as wealthy as if you were the founder, but you’re also not as attached to one company.
You can own multiple companies over the years.” “The best career accelerator you can have is joining a Revolut, Robin Hood, or Figma early enough—and you don’t have to be the first employee.
If your employee 100 at Revolut or 200, you’re going to make a lot of money.” On top of that, he adds, you’ll see your career grow at an exponential rate.
“You’re going to have such an asset for your next role, and that next role could be another very fast-growing company in a more senior role, or it can be starting your own thing.” “And again, that’s how you make wealth by being an owner.
That’s what stock options give you. You become an owner of the company you work for, and that’s how you build wealth.” How to spot the next Meta or Figma It doesn’t matter if you’re not -savvy.
Mignot says anyone can break into the startup industry— any other company, they still need the s of marketers and salespeople, and they tend to hire young.
“If you look at Revolut hiring strategies, it’s a lot hiring very smart, very young, very hungry people who really want to make it.” But how can you tell if you’re applying for the next stock market darling?
“If you look at most of the recent IPOs, they will have been backed by a venture capital fund by and large,” he says, adding that young people should look at which startups VC firms Index Ventures are backing.
“There are millions of companies getting started every day,” he says. So, trying to find a unicorn is quite literally finding a needle in a haystack if you go at it alone. “There’s no chance,” he adds.
But the best venture capital funds “do it again and again and again.” Find the top 20 VC firms and make a list of their recent investments.
“Look at the series A companies, that is where you find the next Revolute, and where you can really own a lot of that of that , as well, as well as have an amazing kind of career trajectory.” To narrow down your list of potential employers, Mignot suggests doing some serious digging.
“The goal is to learn a lot and have an impact. It’s also to become an owner of that . So do your re as if you were in that company,” he adds.
“That means look at all the sources you can find that online. Can you get behind the scenes to do your diligence? Can you find employees or ex-employees? Can you reach out to them on LinkedIn?
Talk to competitors. Think an investor.” And whatever you do, don’t box yourself in. “We in an incredible time where everything is getting more accessible,” Mignot concludes.
“Don’t limit yourself to a single geography, think global, do your due diligence and just go along for a ride.” Fortune Global Forum returns Oct. 26–27, 2025 in Riyadh.
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