Product-Market Fit
Product-market fit pretends to be binary: you have it or you don't. In reality, it's a spectrum. Most companies at 'PMF' are actually at 'one segment fit.' And even that shifts as markets evolve. The real question isn't whether you've found fit. It's whether you've found the ignored struggles worth building around.
What most people mean
The moment your product clicks with a market. Marc Andreessen’s famous line: “You can always feel when product/market fit isn’t happening. And you can always feel it when it is happening.” Sean Ellis’s test: would 40% of users be “very disappointed” if your product disappeared?
VCs use it as a gate. “Have you found PMF?” Pre-PMF, you’re searching. Post-PMF, you’re scaling.
Where the definition breaks
The binary framing creates two problems.
First, it implies a moment. A threshold you cross. Before: lost. After: found. But positioning is a work in progress, even for people who wrote books on positioning. Markets shift. Competitors enter. Segments evolve. What felt like “fit” 18 months ago can drift into irrelevance without you noticing.
Second, “product-market fit” bundles too many things into one concept. Which product? Which market? Which segment? Most companies that claim PMF actually have fit with one segment, solving one set of struggles, through one set of triggers. Expand to a different segment or category and the “fit” evaporates.
The STFO framework doesn’t use the term because it’s too blunt. “Do you have product-market fit?” is an unanswerable question. “Have you identified ignored struggles that alternatives don’t solve for a specific segment in a category with genuine demand?” is answerable. And actionable.
How we define it at STFO
The STFO framework replaces the PMF question with five specific, testable questions:
- Job: what goal is your segment trying to achieve?
- Alternatives: what are they currently using to get the job done?
- Ignored struggles: what problems do those alternatives leave unsolved?
- Segment: who experiences these struggles most acutely and frequently?
- Category: is there genuine demand in this space?
If you can answer all five with evidence from customer conversations (not boardroom assumptions), you have something more useful than “PMF.” You have a positioning foundation.
And it’s never done. You revisit. You adjust. You forage for new insights. The companies Louis works with have had product-market fit, maybe more than once. They’ve repositioned. They’ve survived crises. The work is continuous, not binary.
What it is NOT
- Not a binary state (it’s a spectrum that shifts over time)
- Not a single moment (it’s a continuous alignment between product, segment, and struggles)
- Not a reason to stop doing positioning work (“we have PMF” is the beginning, not the end)
- Not the same as “one segment fit” (fit with one group doesn’t mean fit with the market)
- Not measurable with a single survey question (the 40% test measures satisfaction, not positioning)
"Positioning is a work in progress, even for people who wrote books on positioning. And I have no problem admitting this."
Implied across Stand The F*ck Out (2024) by Louis Grenier.
Related terms
Go deeper
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One of the hardest-to-miss symptoms of poor positioning is this: Buyers do not understand what you're selling. And, because they aren't sure if they want any, you probably aren't selling all that much.
Hear it discussed
The Stand The F*ck Out framework, introduced by Louis Grenier in 2024, consists of four stages: insight foraging, unique positioning, distinctive brand, and continuous reach.
