18 Mistakes That Kill Startups

Paul Graham identifies 18 critical mistakes that kill startups, with the overarching theme that all failures ultimately trace back to one fundamental problem: not making something users want. Each mistake represents a different path to this same destination—from foundational choices like single founder and bad location, through execution problems like slowness in launching and hiring bad programmers, to psychological traps like obstinacy and half-hearted effort. The essay provides both diagnostic patterns and preventive guidance, revealing how seemingly unrelated problems often share common roots.

4 sections · 18 lessons

Course outline

Foundations & Team

  1. Single Founder
  2. Founder Disputes
  3. Full Commitment
  4. Geographic Hubs
  5. Foundations & Team

Product & Strategy

  1. Problem Selection
  2. Original Ideas
  3. Vision vs Obstinacy
  4. Specific Users
  5. User First
  6. Product & Strategy

Execution & Launch

  1. Technical Hiring
  2. Platform Choice
  3. Launch Timing
  4. Early Adopters
  5. Business Development
  6. Execution & Launch

Capital & Growth

  1. Runway
  2. Premature Scaling
  3. Funding Pressure
  4. Investor Control
  5. Capital & Growth

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