The best-known product-market fit test asks users how they would feel if they could no longer use your product. If a large share would be very disappointed, you're onto something. The follow-ups tell you who those people are and what they value, so you can find more of them.
We've ticked a short starter set. Change it to suit you.
The key question
Who you are
What you value
What to improve
4 questions selected
Tips for a better product-market fit survey
Only ask people who have used the product recently and more than once.
Read the “very disappointed” group's answers first; that's who the product is really for.
Repeat it each quarter and track the share of “very disappointed” answers.