All terms
Product
Product-market fit (PMF)
The state in which a product satisfies strong market demand, evidenced by sustained organic usage, low churn, and customers actively recommending it.
By Daniel Reyes · Last updated May 19, 2026
In plain English
When customers pull the product from you faster than you can push it to them. You'll know.
Example
A SaaS where 40%+ of new signups come from word-of-mouth, week-1 retention is above 50%, and customers email asking 'when's the new pricing tier?' — that's PMF.
Why it matters
Before PMF, almost nothing else matters. After PMF, scaling becomes possible. Most founders try to scale before they have it; that's the costliest mistake in startups.
Common mistakes
- Mistaking growth for PMF (you can grow without it via paid acquisition)
- Declaring PMF after 3 happy customers (need cohort data over months)
- Hiring for scale before PMF — burns cash without compounding