ทั้งนี้ ที่ผ่านมา Viva Republica สามารถระดมเงินทุนได้ประมาณ 54,000 ล้านบาท โดยมีสถาบันการลงทุนชื่อดังเข้าร่วมลงทุน เช่น PayPal, Sequoia Capital China และกองทุนความมั่งคั่งแห่งชาติของสิงคโปร์
Toss, South Korea’s Biggest Fintech, Was Built by a Dentist
By Longtunman
If I told you that a dentist quit a stable career, then went on to build 8 startup businesses in a row that all failed,
many people would probably think this story would not end well.
But for Lee Seung-gun, he eventually managed to build a fintech business worth 200 billion baht, with more than half the country using it.
And he did it even though he had no real background in technology or finance to begin with.
So how did this man build such a business ?
Longtunman will explain.
Lee Seung-gun is currently 44 years old. He graduated in dentistry from Seoul National University and worked as a dentist at Samsung Medical Center.
Even though his career path looked secure, Lee Seung-gun felt that treating patients one by one was not something he wanted to do for the rest of his life.
He wanted to create something that could impact society on a much larger scale, so he decided to quit and build startups, even though he had almost no knowledge of technology.
During the first 5 years, Lee Seung-gun hired developers to build a total of 8 applications, such as a social media app, a selfie app, and an online voting app.
But every one of those businesses failed. At one point, he had only 20,000 won left in his bank account, or less than 500 baht.
Even so, Lee Seung-gun did not give up. He noticed a major problem in South Korea’s financial system that frustrated everyone, but that no one had really solved.
That was the fact that in the early 2010s, online money transfers in South Korea were still quite complicated and inconvenient.
People had to fill in information and passwords through more than 10 steps, so each transfer could take several minutes.
So he founded a company called Viva Republica to create a money transfer app called “Toss.”
Toss launched in 2015 and solved this market pain point by reducing the identity verification process to only 3 steps.
As a result, the app immediately disrupted the traditional banking system and received a very strong response, reaching 600,000 accounts in its first year.
On top of that, Lee Seung-gun had his team update the app almost every week, continuously developing new features to better serve users, which helped Toss remain popular over time.
And the company did not stop at just money transfers. It added other products and services such as digital banking, stock trading, lending, insurance, personal financial management, tax planning, and more.
This was part of its strategy to push Toss into becoming South Korea’s all-in-one financial super app.
Today, Toss has grown to 30 million registered accounts, or around 60% of South Korea’s total population.
Because of this, Viva Republica’s business performance has continued to grow steadily.
In 2024,
revenue was 42 billion baht, and profit was 460 million baht.
In the first half of 2025,
revenue was 30 billion baht, and profit was 2.3 billion baht.
The company made a profit for the first time in 2024, and it is clear that it is now in a phase of rapid growth.
So far, Viva Republica has raised around 54 billion baht in funding, with well-known investors participating, such as PayPal, Sequoia Capital China, and Singapore’s sovereign wealth fund.
Based on its latest funding round, the company was valued at 242 billion baht, making it a unicorn startup and currently the largest fintech company in South Korea.
There are also reports that Viva Republica plans to list on the U.S. stock market within 2026, in order to raise capital and expand its services into countries around the world.
This has led to speculation that the company’s valuation could rise beyond 330 billion baht.
As for founder Lee Seung-gun, Forbes has estimated his net worth at around 31 billion baht.
That has made him the 32nd richest billionaire in South Korea.
The story of Toss is an interesting lesson that
failure is not always the end. Even Lee Seung-gun had to go through 8 rounds of trial and error before finding the right idea.
And sometimes, a business idea does not come from cutting-edge technology, but starts with a simple question like: why is transferring money this complicated ?
That ordinary question allowed one dentist to build a 200-billion-baht fintech business used by more than half the country, in a way that almost seems unbelievable.