A country of fewer than 1.4 million people has produced ten billion-dollar startups — about 7 for every million residents, more than three times the US rate — and the first of them was a voice-call app a handful of engineers built in Tallinn in 2003.

Estonia’s population stood at 1,360,745 at the start of 2026, according to Statistics Estonia. That is smaller than many single cities. Out of it has come ten companies that reached a billion-dollar valuation at some point in their history, among them Skype, Wise, Bolt, Pipedrive, Playtech and Veriff, according to Invest in Estonia’s own tally.

Using CB Insights’ underlying company data alongside that population figure, a figure Invest in Estonia and outlets including Fintech Baltic put at roughly 7.1 unicorns per million residents, based on Invest in Estonia’s cumulative count of companies that have ever reached $1B — not a live ranking CB Insights itself publishes, second only to Liechtenstein and more than three times the United States’ rate of about 2.2 per million.

That per-capita figure is a calculation built on CB Insights’ data, not a ranking CB Insights itself publishes, and it is worth reading as a proxy for the ecosystem’s density rather than a formal league table.

The tiger leap that came before the unicorns

This density didn’t happen by accident, and it didn’t start with a startup. In 1996, five years after regaining independence from the Soviet Union, Estonia launched a state programme called Tiigrihüpe, or Tiger Leap, championed by future president Toomas Hendrik Ilves and education minister Jaak Aaviksoo. Its goal was blunt: wire the country’s schools for computers and the internet as a deliberate act of catching up. It worked faster than almost anyone expected.

Within a year, according to documented accounts of the programme, 97 percent of Estonian schools had internet access, an extraordinary figure for a country that had been rebuilding its basic infrastructure from Soviet-era systems only a few years earlier. Two decades later, in 2014, the government extended the same instinct outward with e-Residency, a digital identity scheme that lets people anywhere in the world register and run an Estonian company online, without granting them any right to actually live there. Neither programme produced a unicorn by itself. What they produced was a population that treated computers as ordinary tools a generation before most of Europe did, and a legal and administrative system built to let a small number of people start companies with very little friction.

The one that started it

The first of the ten billion-dollar companies was Skype, built in Tallinn in 2003. Its founders, the Swede Niklas Zennström and the Dane Janus Friis, co-founded the company with three Estonian engineers, Ahti Heinla, Priit Kasesalu and Jaan Tallinn, who built the software behind what was then an unusually good way to make free voice calls over the internet. eBay bought the company two years later for a reported $2.6 billion in upfront cash and stock (total consideration including later earn-outs was reported as high as $4.1 billion).

Skype itself has since been folded into Microsoft and no longer exists as a standalone business, but it left something behind in Tallinn that the other nine companies on the list arguably needed first: a generation of engineers and early employees who had already helped build something that scaled to hundreds of millions of users, and who knew, from direct experience, that it could be done from Estonia rather than London or Silicon Valley.

Why the count kept growing

The clearest example of that inheritance is Wise. Its co-founder Taavet Hinrikus was Skype’s first employee; his eventual co-founder, Kristo Käärmann, worked at Deloitte in London. Both were Estonians living abroad with an ordinary, irritating problem: Hinrikus was paid in euros but lived in the UK, and Käärmann was paid in pounds but had a mortgage back in Estonia in euros. According to the company’s own account of its founding, on Wise’s own history page, the two of them started by simply swapping money directly with each other every month, at the real mid-market exchange rate, to avoid their banks’ fees and markups. They launched TransferWise, later renamed Wise, in 2011, and it went public in London a decade later, making both founders Estonia’s first tech billionaires.

That pattern, alumni from one successful company seeding the next, is common in tech clusters generally, but it is unusually visible in a country as small as Estonia, where the total pool of experienced software engineers was never large to begin with, and where a handful of Skype veterans and their networks touch a disproportionate share of what came after. It wasn’t only talent that recirculated. Toivo Annus, one of Skype’s founding engineers who led its engineering team until the eBay sale, went on to co-found Ambient Sound Investments with three other early Skype engineers in 2003, a private investment firm that has since backed more than 50 early-stage ventures, according to documented accounts of his career. Annus died in 2020, but the firm he helped start is still one of the more active early-stage investors operating out of Tallinn, another channel through which Skype’s original payout kept funding whatever came next.

A pipeline that keeps producing, even without unicorns

The ecosystem underneath those ten companies is larger and more active than the unicorn count alone suggests. Estonian startups collectively reported €3.9 billion in revenue in 2024, up 14.7 percent on the year before, according to Invest in Estonia’s own sector figures, and the sector now employs about 14,400 people directly, or roughly one in every 38 working Estonians, at an average monthly salary of €3,650, more than double the national average. Venture capital raised by Estonian startups actually fell 23 percent in 2024, to €326.6 million across 57 rounds, the lowest total in five years, a reminder that a dense unicorn count doesn’t insulate a small ecosystem from a broader European slowdown in early-stage funding. What has held up is the type of company being funded: deep technology, rather than consumer apps or fintech, took 63 percent of all startup investment in 2024, led by rounds for the delivery-robot company Starship Technologies and the green-hydrogen firm Stargate Hydrogen.

What the density figure doesn’t tell you

A per-capita unicorn count says nothing about how many of those companies are still worth a billion dollars today, still headquartered in Estonia, or profitable. Playtech moved its primary listing to London years ago. Skype no longer trades as an independent business at all. What the figure does capture, reliably, is how much outsized technology output a small population has produced relative to its size, whatever has happened to any individual company since, and how much of that output traces back to a single, now-defunct voice-calling app and the state’s own earlier bet on wiring its classrooms. For a country with fewer people than a mid-sized American county, that is the more durable claim.