Hundreds of thousands of startups are born worldwide every year, and even more quietly disappear. Why do companies with ample funding, strong teams, and advanced technology fail? The data already holds the answer.[Photo = Korea Business Review DB]
A latest report by CB Insights published in March 2026, analyzing 431 closures of VC-backed startups since 2023, reaffirms an uncomfortable truth in the startup ecosystem.
The total amount of funding raised by these defunct companies reached $17.5 billion, approximately 24 trillion Korean won. Among them, the median funding stood at $11 million, or roughly 15 billion won. They did not fail because they lacked money. They failed because they misplaced funds where they were not needed, the market itself did not exist, or their timing was off.
The startup environment in 2026 is reorganizing faster than ever. The commoditization of AI, the normalization of investment sentiment, and a paradigm shift centered on profitability are taking place simultaneously. What differences lie between startups that survive on this terrain and those that vanish?
Anatomy of Failure — Why Startups Die
Asking why startups fail is the starting point for understanding the conditions of success.
According to a comprehensive analysis by CB Insights combining post-mortem reports, founder interviews, and investor statements from 431 VC-backed companies that closed down since 2023, cash depletion ranks as the number one direct cause of closure at 70%. However, researchers clarify that this is not the root cause, but rather the 'final stage of death.' The actual underlying causes lie elsewhere.
The lack of Product-Market Fit (PMF) accounted for the highest share at 43%. This was followed by wrong timing or macroeconomic shifts (29%), and unsustainable unit economics (19%). Ultimately, these three factors act as the structural causes that lead to cash depletion.
When you build a product customers do not need, no amount of marketing spend will generate growth momentum. Without momentum, you cannot secure subsequent funding. When cash runs out, the company shuts its doors. The causal relationship of failure is this simple and brutal.