Insights on measuring product-market fit, customer development, and building products people love.
For SaaS products, product-market fit (PMF) means users keep using your product because they truly need it, not just because switching would be a hassle. One...
Mar 16, 2026 · 9 min read
The Sean Ellis 40% test is the most validated method for measuring product-market fit. Ask your users "How would you feel if you could no longer use...
Mar 13, 2026 · 7 min read
If your PMF score is below 40%, focus on two things: find the user segment that already loves you (they exist), and fix the specific blockers that keep...
Mar 11, 2026 · 6 min read
High Expectation Customers (HECs) are the users who define your product-market fit. They're the most demanding users in your base — and if you build for...
Mar 9, 2026 · 6 min read
"Very disappointed" is the only PMF survey response that matters. Users who say they'd be "very disappointed" if your product disappeared are your core PMF...
Mar 7, 2026 · 5 min read
The best Delighted alternative for indie developers focused on PMF measurement is FitSignal ($29/month). It's the most direct replacement — dedicated PMF...
Mar 5, 2026 · 9 min read
Getting product-market fit is crucial, and one key indicator is when over 40% of your core users would be 'very disappointed' if your product vanished. You've built ...
Mar 3, 2026 · 7 min read
Product-market fit isn't a feeling — it's a number. Learn how the Superhuman method gives you a clear, repeatable way to measure whether your product has found its market.
Feb 28, 2026 · 2 min read