What Is Product-Market Fit?

Product-market fit (PMF) is the state where your product satisfies a strong, genuine need in a specific market. Users seek it out, return to it, recommend it to others, and would be genuinely disappointed if it disappeared. It is the inflection point that separates early-stage experimentation from real business growth.

Marc Andreessen, who coined the term, describes it simply: product-market fit means being in a good market with a product that can satisfy that market. The emphasis on market is deliberate, many founders focus obsessively on the product while underestimating how much the choice of market determines success.

Signs that you have product-market fit include: strong organic retention (users come back without being prompted), high referral rates (users tell others about it unprompted), growing word-of-mouth demand, and a clear willingness to pay. The opposite signals, low retention, indifference from users, and slow organic growth, are signs that PMF has not been reached yet.

An MVP is the instrument you use to find product-market fit. It lets you get a real product in front of real users quickly enough to measure whether PMF exists before spending significant time or money on building a full product. Most startups that fail do so because they built too much before testing whether anyone actually wanted it.