The Mom Test

How to Talk to Customers & Learn If Your Business Is a Good Idea When Everyone Is Lying to You

By: Rob Fitzpatrick

Revised and Expanded Edition.

Everyone tells you to “talk to your customers.” Almost no one tells you how to do it without being misled.

THE MOM TEST is the essential guide to customer discovery, showing founders, product teams, and creators how to ask better questions and get real answers. Named after the idea that even your mom will lie to protect your feelings, the book reveals why most customer interviews fail and how to avoid wasting time building products nobody wants.

Instead of generic advice, Rob Fitzpatrick delivers clear rules, real examples, and practical techniques you can use immediately. You’ll learn how to:

• Ask questions that uncover real problems (not compliments)
• Recognize false positives before they cost you months of work
• Separate customer opinions from actual evidence
• Validate ideas without pitching or selling

This updated edition refreshes examples and language for today’s startup, product, and creator economy—while preserving the sharp, no-nonsense wisdom that made the book a modern classic.

If you’re building something new, read this before you build the wrong thing.