The Mom Test

The TL;DR

The definitive, shortest guide to customer discovery. The central rule: don't talk about your idea; talk about their life. Ask about specific past behavior and concrete details, not opinions about the future — because anything involving the future is an over-optimistic lie. Compliments are the fool's gold of customer learning; they feel good but mean nothing. Talk less and listen more. If you don't know what you want to learn from a conversation, don't have it. The book gives concrete scripts, question frameworks, and end-of-interview commitment tests that make it impossible for even your mom to lie to you politely about your "great idea."

Core ideas

• 1Don't talk about your idea — talk about their life.
• 2Ask about specifics in the past, not opinions about the future.
• 3Talk less and listen more.
• 4Compliments are warning signs, not validation.
• 5If you don't know what you want to learn, don't have the meeting.

Key quotes

Apply it this week

• →Replace 'would you use…?' with 'tell me about the last time you…'
• →End every interview with a concrete commitment (intro, follow-up, money).
• →Take written notes during, not after, the interview.