The Sean Ellis Test (PMF Survey)
by Sean Ellis • Author of 'Hacking Growth', Founder of GrowthHackers at Former Growth Lead at Dropbox, Eventbrite, LogMeIn
Sean is the originator of the term 'Growth Hacking' and the creator of the ICE prioritization framework. He led early growth at Dropbox and Eventbrite and is the author of the best-selling book 'Hacking Growth'.
🎙️ Episode Context
Sean Ellis deconstructs the science of Product-Market Fit (PMF) using his famous 'Sean Ellis Test' and outlines a systematic approach to sustainable growth. He explains why startups should focus on activation and onboarding before acquisition, and how to combine qualitative insights with data to drive high-velocity experimentation.
Problem It Solves
Startups often rely on gut feeling to determine if they have Product-Market Fit, leading to premature scaling.
Framework Overview
A survey-based framework to quantify PMF by asking users how they would feel if they could no longer use the product. The magic threshold is 40% answering 'Very Disappointed'.
🧠 Framework Structure
Ask the Magic Question: 'How would yo...
Target the Right Segment: Survey acti...
Focus on the 40%: Deeply analyze the ...
Ignore the Middle: Don't optimize for...
When to Use
Before spending significant budget on marketing or scaling acquisition channels.
Common Mistakes
Surveying cold leads or people who just signed up but haven't used the product; trying to please the 'somewhat disappointed' users.
Real World Example
At Lookout (mobile security), initially only 7% were 'very disappointed'. Sean found this group valued 'antivirus' specifically. He repositioned the messaging and streamlined onboarding to focus on antivirus. The score jumped to 40% in two weeks.
The question is, how would you feel if you could no longer use this product? Once you got a high enough percentage of users saying they'd be very disappointed, most of those products did pretty well.
— Sean Ellis