📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
Talking to a rival's customers is really the win-loss and churn interview discipline, and this guide from Klue (a competitive intelligence company) breaks down exactly how to run those conversations so people open up instead of clamming up. It gives you a 12-part question flow that moves from their original buying story to why they switched, which keeps the chat about their experience rather than feeling like you are digging for dirt on a competitor. Treat it as a starting point for your own script, not a rigid form.
From
Klue
by Adam McQueen
~15 min read
- Frame the conversation around the person's own buying and usage story, not around your competitor, so it never feels like an interrogation or a sales pitch.
- Ask about the switch and the trade-offs (what they gained, what they gave up) to surface the honest gaps a rival's marketing hides.
- When someone blames price, keep digging: cost is usually a symptom of a deeper problem they had not fully named.
Open
klue.com →
📖 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 →
📄 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 →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
A transcript of a real switch interview so you can hear what a great customer conversation actually sounds like. Reading it shows how a skilled interviewer follows the timeline of a purchase and keeps digging without leading. Much more useful than abstract advice when you are learning to run these yourself.
From
Jobs to be Done Radio
- See a real interview unfold instead of reading rules about one
- Notice how the interviewer follows the timeline of the decision
- Small 'why did you do that' probes uncover the real motivation
Open
jobstobedone.org →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
The standard modern playbook for keeping discovery continuous so roadmap decisions stay grounded in real customer input, not one-off research. Exactly what founders need to stay close to users while shipping.
From
Product Talk
by Teresa Torres
~240 pages
- Start from a clear desired outcome.
- Interview customers weekly to surface opportunities.
- Use an opportunity solution tree to visualize and align your decisions.
Open
producttalk.org →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
The most-quoted primary source on why founders should launch fast and iterate, short, canonical, and from the co-founder of YC. Read it when you're tempted to keep polishing before launch.
From
paulgraham.com
by Paul Graham
~8 min read
- Launch fast, you haven't really started until you launch.
- Most ideas appear in the implementing, so ship to learn.
- Make a few users love you rather than many ambivalent.
Open
paulgraham.com →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
If you're selling to businesses rather than consumers, this book adapts customer development to the messier reality of committees, procurement, and long sales cycles. It goes deeper than any single essay on how to identify the right person to interview inside an organization that already uses your competitor's product.
From
leanb2bbook.com
by Etienne Garbugli
~280 pages
- The decision-maker and the daily user are often different people, interview both
- Validate the problem's business impact before validating your solution
- Beachhead one narrow segment before trying to serve everyone
Open
leanb2bbook.com →
✍️ Essay
✓ Link checked
Free
Intermediate
Why we picked it
Amy Hoy and Alex Hillman built the Sales Safari methodology, and a business, around finding what an audience already complains about paying to fix, then selling before building. This piece, written by Hillman, updates that research method for modern community platforms, which is a useful complement to one-on-one interviews when you want pattern evidence across many potential customers at once.
From
Stacking the Bricks
by Alex Hillman
12 min read
- Look for what people are already frustrated enough about to have spent money trying to fix.
- Research an audience's own words in public forums before you ever pitch them anything.
- Pre-selling forces you to describe a specific, paid outcome before you have built the thing that delivers it.
Open
shorts.stackingthebricks.com →
📄 Article
✓ Link checked
Freemium
Beginner
Why we picked it
Recruiting is often the actual hard part of this problem, not the conversation itself. This gives you the tactics NN/g uses across hundreds of studies for reaching people who use a specific product, including how to screen for the right participant without tipping your hand about why you're asking.
From
Nielsen Norman Group
by Nielsen Norman Group
20 min read
- Write screener questions that don't hint at the answer you want
- A small, well-targeted sample beats a large, loosely qualified one
- Expert or frequent users of a product reveal edge cases casual users miss
Open
nngroup.com →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
Hall's book gives you the research discipline behind good interviewing: how to avoid leading a witness, how to write a discussion guide, and how to separate what you observed from what you interpreted. It's aimed at product teams generally, so it's broader than customer development books, but the interviewing chapters translate directly to founder conversations. It's a fast read and cuts the fluff other research books carry.
From
A Book Apart / Erika Hall
by Erika Hall
~120 pages
- Write your questions down in advance, improvising under pressure tends to lead the witness.
- Separate your notes into said, did, and your interpretation, don't blend them.
- A clear purpose statement and informed consent make people more honest, not less.
Open
abookapart.com →
📄 Article
✓ Link checked
Free
Intermediate
Why we picked it
This is the piece written for exactly your situation: no audience, no network, no obvious way to reach the people you need. Cohen lays out concrete channels to find strangers who fit your customer, from communities to cold outreach, when you are starting from zero. It removes the most common excuse, that you cannot find anyone to talk to.
From
A Smart Bear (Jason Cohen)
by Jason Cohen
- You can find interviewees even with no audience or list
- Go where your target users already gather online
- A handful of the right conversations beats a big launch
Open
longform.asmartbear.com →
📄 Article
✓ Link checked
Free
Beginner
Why we picked it
A short, practical answer to the recruitment problem this question is really asking about: where do I even find these people. Good as a quick companion to the Jason Cohen essay above if you want a second, shorter list of channels before you start outreach.
From
Lean Startup Co.
by Lean Startup Co.
8 min read
- Warm introductions from your existing network outperform cold outreach
- Online communities where your target customer already gathers are a fast source
- Ask every interviewee for one more introduction before you end the call
Open
leanstartup.co →
✍️ Essay
✓ Link checked
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 →
📖 Book
✓ Link checked
Paid
Intermediate
Why we picked it
Dunford's whole method starts with the customers who already love your product, then turns that into positioning the entire team can repeat the same way. Her final step is literally capturing positioning so it can be shared, which is the exact problem you have once new hires start describing your customer in their own words. Read it when you want the ICP and the pitch to stay consistent from the founder down to the newest rep.
From
April Dunford
by April Dunford
Short book, about 200 pages
- Positioning should start from the specific customers who already get real value, not from a generic market.
- A shared positioning document is what keeps a growing team describing the same ideal customer.
- The book is battle tested across hundreds of B2B tech companies, so the process travels well beyond one industry.
Open
aprildunford.com →
✍️ Essay
Free
Intermediate
Why we picked it
Garbugli, a three-time B2B founder, lays out the actual questions to ask about business drivers, pain intensity, and who owns the buying decision, which is more concrete than most generic interview guides. If your target is a B2B buyer rather than a consumer, this fills in the organizational questions The Mom Test doesn't cover in depth.
From
Lean Startup Digest (Medium)
by Etienne Garbugli
10 min read
- Ask who owns the problem inside the company, not just who feels the pain
- Run two passes: a wide discovery interview, then a narrow drill-down one
- Customers who recently switched from a competitor make the best case studies
Open
medium.com →
