Why Startups Fail

Startups fail primarily because they build products the market doesn't want, run out of cash, or hit unrecoverable conflict among the founding team. According to CB Insights' ongoing analysis of hundreds of startup post-mortems, these are the top three causes (with the cash failure typically meaning before reaching profitability or the next round). Roughly 70 percent of venture-backed startups shut down or fail to return capital within their funding lifecycle, and survey-based long-term failure rates run closer to 90 percent.

CB Insights' "Top Reasons Startups Fail" report, drawn from founder post-mortems, has consistently ranked "no market need" as the most-cited cause of failure, appearing in roughly 35 to 42 percent of post-mortems across multiple updates. The next most common causes: ran out of cash or failed to raise new capital (~30 to 38 percent), wrong team or team problems (~20 to 23 percent), got outcompeted (~20 percent), pricing or cost issues (~15 to 18 percent), bad product (~17 percent), and need or lack of business model (~17 percent). Many failures cite more than one cause. Noam Wasserman's "The Founder's Dilemmas" research found that roughly 65 percent of failed startups involved cofounder conflict as a contributing or primary cause, which dovetails with the CB Insights "team" category. The pattern across the data: most startups die not from competitive defeat but from internal causes (wrong product, wrong team, ran out of runway) that were visible months before the company shut down.

What founders get wrong: Treating failure as bad luck. Most failures are visible months before the shutdown: the customer interviews said no, the burn rate said no, the cofounder dynamic said no. Calling it bad luck after the fact is how founders avoid learning the lesson the next time.

Related: Startup · Product-Market Fit · Runway · Co-founder

FAQ

What percentage of startups fail?
Roughly 70 percent of venture-backed startups shut down or fail to return capital within their funding lifecycle (CB Insights). Survey-based long-term failure rates across all startups, including non-venture-backed, run closer to 90 percent.

What is the number one reason startups fail?
Building something the market doesn't want. CB Insights' analysis of startup post-mortems has consistently ranked "no market need" as the most-cited cause, appearing in roughly 35 to 42 percent of failures.

How does cofounder conflict cause startup failure?
Wasserman's research found roughly 65 percent of failed startups involved cofounder conflict as a contributing or primary cause. Disagreements over equity, roles, vision, or commitment levels accumulate and eventually break the team's ability to execute.