How to talk to customers & learn if your business is a good idea when everyone is lying to you.

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The book

The quick and easy handbook about how to get more learning and more sales out of your customer conversations. Even when everyone is lying to you.

Stop wasting your time

Entrepreneurs are universally busy, yet odds are high that you’re wasting huge amounts of time sitting in pointless meetings and building unnecessary features. Take two hours to read this book and you’ll see it repaid tenfold.

Practical, not academic

The world doesn’t need another framework or theory. The Mom Test skips all that and gets to the hands-on challenges. How to avoid biased feedback? How to write an email that makes people want to talk to you? How to figure out whether someone is really going to buy? It’s all in here.

4.7/5 stars on Amazon

4.7/5 stars on Amazon

4.4/5 stars on Goodreads

4.4/5 stars on Goodreads

Available in 10 languages

The Mom Test is now available in English, Español, Française, Português, Deutsch, Nederlands, Svenska, Русский, Српски, فارسی


If you aren't sure about how to ask the "right" questions to ascertain whether there is real customer pain, the best book on the subject is called The Mom Test. I highly recommend it.

Carlos Espinal

Partner, Seedcamp and author, Fundraising Field Guide

Ounce for ounce, there's no better way to learn what customers want and will buy than this wonderful little book. If you want your new product or new business to succeed, start here.

John Mullins

Author, The New Business Road Test, Getting to Plan B, and The Customer-Funded Business

Read this short book! We believe this is the best and most accessible book for entrepreneurs who are seeking product market fit.

Simon Murdoch

Partner, Episode1

About the author

Rob Fitzpatrick

I’ve been an entrepreneur for 10 years, running both bootstrapped and VC-backed companies. I’m a YCombinator alum (summer ‘07), have raised funding in the US and UK, and have built products used globally by brands like Sony and MTV.

I’m a programmer who was forced - like so many others - into a customer-facing role at my first company. And while I knew I was supposed to talk to customers, none of the books about sales or Customer Development seemed to help me figure out how to actually do it properly.

The Mom Test is that missing handbook, and is now used as a core part of the curriculum at universities like Harvard and UCL, EU startup accelerators like Seedcamp and Microsoft Ventures, and businesses like Shopify and Pact Coffee.

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Take the online course

Practical Customer Development

Start on Udemy

Learn how to talk to customers and get reliable, non-biased feedback on your business or product before it exists.

1.5 hours of video

The course covers all aspects of talking to customers, including where conversations go wrong, how to ask questions that provide real data, and how to transition into sales.

4 group workshops

Identify mistakes in your current process and build a simple, sustainable learning plan that you spread across your whole organization.

Free email course

The top 5 mistakes of talking to customers

If you’re still not sure whether the book is for you, drop your email in the box for a free email course to help audit your customer conversations and spot the big mistakes. It’s one email per day for 5 days and you’ll receive the first within minutes.

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