Product-Market Fit: How to Know You Actually Have It

PMF is felt, then measured

Product-market fit is when the market pulls the product out of you. Before it, growth is a grind; after it, the problem becomes keeping up.

Signals you have it

  • Retention curves that flatten (people keep coming back)
  • Organic word-of-mouth and inbound demand
  • Customers would be “very disappointed” without you (Sean Ellis test ~40%+)
  • Usage growing faster than your marketing spend

Before vs after

  • Before: obsess over the problem and a narrow segment
  • After: pour fuel on what works and build the growth engine

Don’t scale before fit. Scaling a leaky product just spends money to lose customers faster.

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