Product-Market Fit (PMF) is the point at which a product satisfies strong market demand. It occurs when customers are actively seeking, buying, and recommending your product because it solves their problem better than alternatives.
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