B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
40%
40% -- product market fit threshold for Sean Ellis PMF survey framework (2026)
Achieving 40% or more of customers reporting they would be very disappointed if a product went away indicates product-market fit.
- Threshold rule-of-thumb attributed to Sean Ellis
Attribution:
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Lighthouse Research Team
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Source verified
Evidence graded
Value
40%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
allfactors.com
Primary
Tier C
https://allfactors.com/blog/customer-discovery-interview-questions ↗
Source Article
How To Do Customer Discovery Interviews And Questions To Ask
Original Research
allfactors.com
· Original study ↗
Methodology
PMF survey methodology attributed to Sean Ellis; percentage of customers answering 'very disappointed' question
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Sean Ellis PMF survey framework: 40% product market fit threshold. Source: allfactors.com (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/pmf-survey-40-percent-threshold
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<blockquote cite="https://lighthousedata.io/data/pmf-survey-40-percent-threshold" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>40%</strong> -- product market fit threshold for Sean Ellis PMF survey framework<br><small>Source: allfactors.com (2026) · <a href="https://lighthousedata.io/data/pmf-survey-40-percent-threshold" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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