📖 Book
✓ Link checked
Paid
Beginner
Why we picked it
The single best thing ever written on customer conversations. It teaches you to ask about the customer's life and past behaviour, not your idea, so you can't be lied to. If a founder reads one thing before talking to a single customer, it's this.
From
momtestbook.com
by Rob Fitzpatrick
~130 pages
- Talk about their life, not your idea.
- Ask about specifics in the past, not opinions about the future.
- 'That's so cool, I'd totally buy it' is a compliment, not data, dig for commitment and evidence.
Open
momtestbook.com →
📖 Book
✓ Link checked
Paid
Beginner
Why we picked it
Savoia, who led early Google AdWords, argues most ideas fail because nobody wanted them, and teaches pretotyping: cheap experiments that generate your own data on real demand before you build. You get concrete tactics like the fake-door and the mechanical-turk test, plus a way to demand skin-in-the-game commitment rather than opinions. Practical for anyone who wants a test that can prove them wrong.
From
Alberto Savoia
by Alberto Savoia
~250 pages
- Collect your own data on real behaviour instead of trusting opinions
- Pretotype the idea to test demand before you build a prototype
- Measure commitments like a signup or a payment, not verbal enthusiasm
Open
albertosavoia.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
The cleanest distillation of the one framework that turns a customer chat into a relationship instead of a survey. The three rules (talk about their life not your idea, ask about the past not hypotheticals, and chase real commitments of time, reputation, or money) are exactly how you get an early customer to tell you what nearly stopped them from buying and who else you should talk to. Rekhi is a product leader, so the examples are operator-grade, not book-report fluff.
From
Sachin Rekhi's Blog
by Sachin Rekhi
10 min read
- Never pitch your idea in the conversation; ask how they handle the problem today and what it costs them, so praise can't lie to you.
- The strongest signal is a commitment that costs them something: a trial, an intro to a colleague, or a pre-order.
- 'Would you buy this?' teaches you nothing; 'walk me through the last time you dealt with this' surfaces the real story and the referral.
Open
sachinrekhi.com →
✍️ Essay
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Free
Beginner
Why we picked it
Wilcox gives you a literal five question script built entirely around a recent problem, not your product, which is exactly the reframe your short answer calls for. It is the most tactical resource on this list, useful whether you are interviewing a friend, a friend of a friend, or a total stranger.
From
Justin Wilcox, Customer Development Labs
by Justin Wilcox
- Never mention your idea, only ask questions and affirm what they tell you
- Anchor every question in a specific recent event, not a general habit or a guess
- The five question sequence surfaces the real problem even when the interviewee wants to be helpful
Open
customerdevlabs.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
Torres makes the single most important move concrete: instead of asking what people generally do, ask them to tell you about a specific recent time it happened. Because memory beats opinion, a real story surfaces the pain and context you would otherwise lead them toward. This is the practical heart of talking about their past, not your future.
From
Product Talk
by Teresa Torres
15 min read
- Ask 'tell me about the last time', not 'do you usually'
- Specific stories expose real behaviour, opinions hide it
- Let the customer do most of the talking through the story
Open
producttalk.org →
✍️ Essay
✓ Link checked
Freemium
Intermediate
Why we picked it
Gupta names the Mom Test problem directly, that people in interviews behave like your mom and unconsciously lie to keep you happy, and pairs it with concrete fixes like using visual prototypes to surface real objections instead of polite ones. It is a good next step once you have the basics down and want sharper techniques for a conversation you know will be biased.
From
Aakash Gupta
by Aakash Gupta
- Leading questions like do not you think this is easier will always get you a biased answer
- Showing a prototype instead of describing an idea makes it easier for people to object honestly
- Deliberately include current, potential, and churned users, not just people who already like you
Open
news.aakashg.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
A step-by-step guide to running discovery when you have almost no data, aimed squarely at first-time founders. It is practical on finding people to talk to and asking in a way that surfaces truth rather than encouragement. A solid starting point before your first batch of interviews.
From
First Round Review
by Jeanette Mellinger
15 min read
- Start discovery before you have a product.
- Recruit the right people to talk to.
- Ask so customers can safely tell you no.
Open
review.firstround.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
A founder-friendly crash course on planning and running discovery interviews, with tactics from researchers at Zoom, Zapier, and Dropbox. It is especially good on picking the one or two things you must learn and writing questions that do not lead the answer. Concrete and skimmable.
From
First Round Review
by Jane Davis
20 min read
- Decide the two things you must learn before the call.
- Reframe important questions from several angles.
- Check your own bias before interpreting answers.
Open
review.firstround.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
Written for solo and early founders rather than VC backed teams, this is blunt about why family and friends are usually the wrong validation panel: they are almost never your actual target market and they are conflict averse by nature. It is a quick, practical push toward finding people who actually fit your customer profile instead of settling for whoever is nearby.
From
Indie Hackers
- Friends and family are unlikely to belong to your actual target market
- Skepticism or enthusiasm from people close to you often reflects their own risk tolerance, not market reality
- Prioritize finding people who fit your customer profile over people who are simply available
Open
indiehackers.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
This explains why people behave differently the instant they know you're watching, which is the deeper reason your own presence in the room is already a source of bias before you say a single word. The mitigation tactics here (building rapport, giving people a real task instead of a demo, stepping back physically) are direct, practical fixes.
From
Nielsen Norman Group
- Being watched changes behavior even if the observer never speaks.
- A real goal and enough time in the task reduce self-consciousness.
- Some observer effect is unavoidable; the goal is to shrink it, not eliminate it.
Open
nngroup.com →
✍️ Essay
✓ Link checked
Free
Intermediate
Why we picked it
Kahl argues that half of good customer discovery is ignoring the wrong people, and he is explicit that supportive friends and family fall into that category because they lack real skin in the game. He also reinforces the problem first framing from your short answer, warning founders to validate the problem, not their own idea of the solution.
From
Arvid Kahl, The Bootstrapped Founder
by Arvid Kahl
- Prioritize people with genuine skin in the game over people who are simply willing to talk
- You are validating a problem, not whether someone likes your specific solution
- Ask why someone proposes an idea to uncover the underlying problem behind it
Open
thebootstrappedfounder.com →
🧵 Thread
✓ Link checked
Free
Beginner
Why we picked it
This thread is a candid, unfiltered discussion of a question every founder eventually asks out loud: how do you actually get a real stranger on a call in the first place. Reading founders trade tactics and admit their own failed attempts is a useful reality check against the tidy advice in more polished articles.
From
Hacker News
- Founders openly admit that finding strangers to talk to is harder in practice than in theory
- Cold outreach, communities, and existing waitlists all come up as ways to reach people outside your circle
- There is no single trick, persistence across many small attempts is what actually works
Open
news.ycombinator.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
Turns the vague feeling of product-market fit into a number you can move. Ask users how they would feel if they could no longer use the product, then track the share who say 'very disappointed'. Under 40 percent means keep working. A test you can run on an idea long before you scale it.
From
First Round Review
by Rahul Vohra
~20 min read
- The 40 percent 'very disappointed' benchmark for product-market fit.
- Segment to your high-expectation customers and build for them.
- Make the fit score a metric you improve quarter by quarter.
Open
review.firstround.com →
Why we picked it
A short, practical field guide to customer discovery: who to talk to, how to find them, and how many. Pairs perfectly with The Mom Test, Fitzpatrick teaches the questions, Constable teaches the logistics.
From
talkingtohumans.com
by Giff Constable
~80 pages (free PDF available)
- Decide who you need to learn from before you start.
- Recruiting interviewees is a skill, scripts and channels included.
- Get out of the building; patterns emerge faster than you expect.
Open
talkingtohumans.com →
Why we picked it
The permission slip to recruit users by hand, do things manually, and deliver 'insanely great' experiences to your first few customers. The cheapest, most honest way to validate demand is to go get it one person at a time.
From
paulgraham.com
by Paul Graham
~15 min read
- Recruit your first users manually, don't wait for them to come.
- A tiny group of users who love you beats a big group who like you.
- Manual, unscalable effort early is a feature, not a failure.
Open
paulgraham.com →
