Article · ~10 min read

The Sean Ellis Product-Market Fit Survey (40% Test)

Sean Ellis · Startup Marketing / GrowthHackers Free Beginner

The original, still-used test for whether you have product-market fit, from the person who coined 'growth hacking' and grew Dropbox and others.

  • Ask users how they'd feel if they could no longer use your product.
  • If 40%+ say 'very disappointed', you likely have fit worth scaling.
  • Below 40%, growth spend accelerates churn instead of revenue.
Open on web.archive.org ↗

It answers 2 questions

  1. Why is retention more important than acquisition?
  2. How do I know if I have product-market fit before I try to grow?

Read with it

  1. Lenny distills how the best product teams pick a single North Star that captures real customer value and drives the whole... Lenny's Newsletter Article · ~20 min read The North Star Playbook & Choosing Your Growth Metrics Lenny Rachitsky
  2. Concrete retention benchmarks and cohort-analysis methods gathered from dozens of top companies, so you can tell a healthy... Lenny's Newsletter Article · ~20 min read How the Best Companies Measure and Improve Retention Lenny Rachitsky
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