Product–market fit
The state where a specific group of people want what you built badly enough to pull it out of you.
Product–market fit is the state in which a defined group of people want what you have built badly enough that selling stops being the hard part. Demand starts pulling: people use it without being reminded, they tell others unprompted, and the constraint moves from finding customers to serving them.
The reason the phrase gets misused is that it is treated as a feeling. It is not — it is visible in three numbers. Retention flattens instead of decaying to zero. Referrals appear without a programme. And usage clusters in one identifiable group rather than spreading thinly across everyone who tried it. Missing any of those, you have interest, which is a different and much cheaper thing.
The most common trap is broadening to find it. When nothing is pulling, adding audiences and features feels like increasing the surface area of luck; in practice it dilutes the one segment that was closest and buys another six months of ambiguous signal. Narrowing works more often.
Worked: 300 signups spread over five industries, 8% still active at month three, no referrals. Inside that, 40 users from one industry retain at 45% and three arrived by word of mouth. The business is not pre-fit across five markets; it has fit in one and is hiding it under four.
Also known as
- PMF
- market fit
Relevant for
- Founders
- Retention flattening, unprompted referrals and one identifiable group — until all three are true you have interest, and broadening the audience will hide the one segment that was working.