プロダクト・マーケット・フィット（PMF）

Product-Market Fit (PMF) defines the working concept used to manage market pull evidence. In practice, it helps leaders judge whether a product solves an important market problem strongly enough to support focused scaling, and it sets a boundary between promising early interest and repeatable market pull. The page should be used as decision support: it names the evidence, trade-offs, owners, and review points needed to avoid scaling before retention and demand evidence are strong enough.

Product-Market Fit (PMF) changes decisions by making retention, organic demand, usage depth, willingness to pay, sales pull, and customer urgency explicit before teams commit budget, roadmap, sales, or customer resources. It clarifies between promising early interest and repeatable market pull, so teams can decide what is in scope, what is deferred, and what evidence is still missing. For Product-Market Fit, this reduces rework because teams compare adjacent concepts, record assumptions, and review whether the chosen action changed customer or business behavior.

• Product-Market Fit (PMF) changes decisions by making retention, organic demand, usage depth, willingness to pay, sales pull, and customer urgency explicit before teams commit budget, roadmap, sales, or customer resources.
• It clarifies between promising early interest and repeatable market pull, so teams can decide what is in scope, what is deferred, and what evidence is still missing.
• For Product-Market Fit, this reduces rework because teams compare adjacent concepts, record assumptions, and review whether the chosen action changed customer or business behavior.

• Look for pull from a specific market, not general enthusiasm.
• Combine qualitative love with behavioral retention and willingness to pay.
• Separate founder-led sales success from repeatable demand.
• Use cohorts to see whether value persists.
• Scale only the segment where evidence is strongest.

A founder delays paid acquisition because activation is high but month-three retention is weak in the target segment. The team writes the decision boundary, gathers evidence on retention, organic demand, usage depth, willingness to pay, sales pull, and customer urgency, compares adjacent concepts, and chooses one operating change to test. In the Product-Market Fit review, the team keeps the parts that changed customer behavior and retires assumptions that were only internally persuasive.

Minimum viable product | Tests a focused learning question | PMF judges whether the market repeatedly pulls the product Value proposition | States the promised value | PMF tests whether customers behave as if that value is real Product usage activation | Measures initial value behavior | PMF also requires durable retention and demand

• PMF is not a single celebratory moment.
• Revenue alone does not prove fit if retention or acquisition quality is weak.
• Different segments can have different levels of fit.