A workable definition
Founder-market fit exists when the founder has an information advantage about the buyer that competitors would need years to acquire, and a distribution advantage that shortens the first hundred sales. Everything else — pedigree, prior exits, domain enthusiasm — is correlated at best.
What to verify
| Claim | Evidence to request | Weak substitute |
|---|---|---|
| Deep buyer knowledge | Named customer conversations with dates | Years in the industry |
| Distribution advantage | Warm intro list that converted | LinkedIn follower count |
| Technical capability | Shipped systems at comparable scale | Degrees and employers |
| Recruiting pull | Senior hires who took a pay cut | Advisor roster |
Questions that separate insight from familiarity
- What does this buyer believe that is wrong, and how do you know?
- Describe the last customer who said no and why they were right to.
- Which part of the workflow have you personally done, not observed?
- Who did you lose to on your last three deals?
Where the assessment goes wrong
The common failure is scoring the resume rather than the advantage. A ten-year veteran of the industry who only ever sat on the supplier side may know less about the buying decision than an outsider who has run forty discovery calls this quarter.
The second failure is treating founder-market fit as static. It compounds or decays with the number of customer conversations per month. Ask for that rate; it is the closest thing to a live measurement.
Part of a guide
Investment due diligence: a complete guide
A complete guide to investment due diligence: the workstreams, the questions investors ask, the red flags that matter, the data room, and how findings become a defensible memo.