Product-Market Fit
Product-Market Fit (PMF) is the point at which a product satisfies strong market demand.
What is Product-Market Fit?
Product-Market Fit is the most important milestone for any startup. Marc Andreessen famously said, "The only thing that matters is getting to product-market fit."
Signs of Product-Market Fit: - Users actively recommend your product to others - Retention rates are high without constant acquisition efforts - Demand exceeds your ability to supply - Users express disappointment when the product is unavailable
The PMF Survey (Sean Ellis Test): Ask users: "How would you feel if you could no longer use this product?" - 40%+ answering "Very disappointed" indicates strong PMF
Before vs After PMF: Before PMF: Focus entirely on iteration, user research, and pivoting After PMF: Focus on scaling, growth, and market expansion
Achieving PMF: 1. Talk to customers constantly 2. Iterate rapidly based on feedback 3. Narrow your target audience initially 4. Solve one problem exceptionally well 5. Measure retention over acquisition
Examples
Slack
Achieved PMF when teams started refusing to work without it, growing from 0 to 1 million daily users in 2 years
Superhuman
Used the Sean Ellis survey to systematically improve until 58% of users said they'd be very disappointed without it
Notion
Found PMF after pivoting from productivity tools to an all-in-one workspace that users couldn't stop sharing
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