Most startups die from no product-market fit, ran out of cash, co-founder conflict, wrong market timing, or bad hiring.
Post-mortems make failure sound cleaner than it is. In practice, most companies die from one of five causes — often several at once — and most were visible for months before the wind-down.
By far the most common cause. Growth requires effort proportional to spend. Customers churn faster than they arrive. The team explains the plateau with roadmap, sales process, or market timing — anything except the honest diagnosis that the product is wrong for the market.
The proximate cause of most failures. Usually the symptom of an underlying issue (no PMF, missed milestones, market timing) rather than a pure cash problem. Bridges get harder each round; every failed fundraise makes the next one harder.
Unresolved conflict at the founder level kills companies more often than founders admit. Equity disagreements, role clarity, and life-stage misalignment (child, geography, ambition) surface as sales problems, hiring problems, and roadmap problems. The root cause stays hidden.
The product is genuinely good, but the market isn't ready. Either too early (customers don't know they need it) or too late (competition has consolidated the space). Timing is the hardest failure to detect early because early signals look the same as building conviction.
One or two senior hires who don't work out can consume a year of runway. Wrong VP Sales in an early sales-led company. VP Engineering who can't scale the team. Senior hires who bring political dysfunction. Bad senior hires cost more than they save.
Rarely one cause. Usually two or three compounding — PMF was weak, so runway didn't extend, so co-founders started conflicting, so hiring stalled, so cash ran out. Fixing any one causes buys time; fixing the pattern requires honesty most teams find hard.
Retention is the earliest PMF signal. Cash coverage 12 months out is the earliest cash signal. Co-founder tension usually shows up as passive-aggressive Slack. Bad senior hires produce lower morale in their org within 90 days. Every signal is measurable if founders look.
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