Comparison
Qualitative vs quantitative customer research
What each kind of research answers, the methods it uses and when to reach for it

A side-by-side comparison of quantitative and qualitative customer research for product teams. Quantitative work such as closed-ended surveys, analytics and A/B tests tells you what is happening and how often. Qualitative work such as interviews and diary studies tells you why. Most projects need both: explore with conversations first, then validate with numbers. Koji runs AI-moderated interviews so the qualitative half can reach hundreds of customers.
Where this appears
What's in this comparison
Quantitative research
- Answers what and how many
- Closed-ended surveys, analytics, A/B tests and NPS
- Gives statistical confidence to validate a finding
- Best for measuring, comparing and tracking over time
Qualitative research
- Answers why people behave the way they do
- Interviews, focus groups, diary studies, contextual inquiry
- Finds the unexpected and the context behind behaviour
- Best for discovery and exploring new problems
Use this image
Free to use in your docs, decks and posts under CC BY 4.0, as long as you credit Koji with a link to this page. To embed it, paste this into your page:
html
<a href="https://www.koji.so/visuals/qualitative-vs-quantitative-customer-research"><img src="https://www.koji.so/visuals/qualitative-vs-quantitative-customer-research/qualitative-vs-quantitative-customer-research.png" alt="Comparison of quantitative research, which answers what and how many, and qualitative research, which answers why, with methods for each" width="1200" height="695" /></a>
<p>Source: <a href="https://www.koji.so/visuals/qualitative-vs-quantitative-customer-research">Qualitative vs quantitative customer research</a>, Koji</p>

