Product/market fit (PMF) is a crucial concept in startups and indicates if their product solves a problem in the market which customers are willing to pay for. The term was first coined by Andy Rachleff (co-founder of Wealthfront), and PMF is more than just affordability; it’s about delivering a superior solution to what customers are already using.
Rachleff emphasizes that genuine product-market fit requires customers who are actively seeking a better alternative to their current situation. These customers are unhappy or dissatisfied with their existing options and are eager for a better and cheaper solution.
To test your idea for product/market fit, Rachleff suggests conducting proof of concept trials. Let the customer use your product or solution for a limited trial period, say 30 days. Then, just before the trial finishes, pull it and see how the customer reacts. If they urge you to keep it going then you have product/market fit. Conversely, if they show little interest or indifference, you don’t have PMF and you need to find out why.
Sean Ellis, known for DropBox and LogMeIn, refined Rachleff’s idea into his own Product Market Fit Test. Ellis found that if over 40% of users would be ‘very disappointed’ if your service ceased tomorrow, you likely have product/market fit.
This feedback from customers is invaluable for understanding your product/market fit and determining your next steps. It prompts questions like:
- Do you have the right product for the wrong market?
- Do you have the right market but the wrong product?
- What changes are necessary to improve product-market fit?
By addressing these questions and leveraging customer feedback, startups can refine their product offering and strengthen their value-add proposition for customers.



