The Mom Test
Talking to customers is hard.
We know we ought to talk to customers. Many of us do talk to customers. But we still build stuff nobody buys.
Customer learning is archaeology.
The truth is fragile. Each blow with your shovel gets you closer, but you'll smash it to pieces if you use too blunt an instrument.
"Do you think it's a good idea?" Heavy questions that force people to flatter you.
Flinching from digging deep — never finding out if anything is buried.
The truth is the goal. Questions are the tool. Learn to wield them.
The Mom Test
A set of simple rules for crafting good questions that even your mom can't lie to you about.
"Mom, do you like my idea?"
A founder pitches an iPad cookbook app. Mom is ready to lie.
Don't mention the idea. Talk about her life.
Mom couldn't lie because we never talked about our idea.
Three simple rules.
Talk about their life
Not your idea. The moment you reveal the idea, biases pour in.
Specifics in the past
Not generics or opinions about the future. People are over-optimistic about what they'll do.
Talk less, listen more
You don't learn anything while your mouth is moving.
Avoiding bad data
False negatives kill ideas that could've worked. False positives kill companies. The second is worse.
What's polluting your conversations?
Compliments
"That's so cool — I love it!" Fool's gold of customer learning: shiny, distracting, worthless.
Fluff
Generics ("I usually"), future-tense promises ("I would"), hypotheticals ("I might").
Ideas
Their feature requests are pointers to motivation, not orders to build.
Fix → deflect compliments, anchor fluff, dig beneath ideas.
"I would definitely buy that."
It sounds concrete. It's not. People are wildly optimistic about future selves. Folks are always more positive, excited and willing to pay in the imagined future than once it arrives.
Pull them out of la-la land.
Generic claim → concrete past behavior. Now you can learn.
"That's awesome — keep me in the loop."
- "Thanks!"
- "I'm glad you like it."
- "That meeting went really well."
- "Everybody loves the idea."
- "We're getting positive feedback."
Asking important questions
A non-biasing question that doesn't move the business forward is just spinning your wheels.
Spot the difference.
Only the market can tell you. Everything else is opinion.
Hypotheticals from optimistic people who want to make you happy.
The number gives a false sense of rigor.
Show, don't tell. Learn from actions, not opinions.
Distinguishes "I'll-pay-to-fix" from "annoying-but-livable" problems.
Reveals workflow, workarounds, and a price anchor.
"Meh" beats "Wow!"
Most informative responses sound like: "Umm, I'm not so sure about that" or "That's pretty neat." Both are lukewarm signals that they don't care.
Don't drown in details before you know the big picture.
If you zoom in on a sub-problem before knowing whether they care about the area at all, every detail you collect is misleading.
- "What are your big goals right now?" → finds priorities they actually act on.
- "How seriously do you take your blog?" → tests whether the problem is even in their top 3.
- "What are the 3 big things you're trying to fix right now?" → forces honest ranking.
Always have your 3 biggest questions ready.
Pre-planning the scary questions makes them easier to face. Update the list as your beliefs change.
Keeping it casual
Strip the formality. The first conversation works better as a chat than a meeting.
Just a chat — over coffee, at a meetup, in a queue.
When you strip the formality, conversations become so fast and lightweight you can leave a meetup with a dozen of them under your belt — each as valuable as a long meeting.
- No 4-hour calendar dance per 1-hour meeting
- No biasing "I'm here to interview you about my startup"
- People love talking about themselves and their problems
- You're more memorable and more likely to get a follow-up
Commitment & advancement
Stop collecting zombie leads. Force the meeting to succeed or fail.
There's no such thing as a meeting that just "went well."
Commitment — they give up something they value (time, reputation, money).
Advancement — they move to the next step in your real funnel.
- Time — next meeting with goals, wireframe review, real trial
- Reputation — intro to peers, decision-makers, public testimonial
- Money — letter of intent, pre-order, deposit
What did they actually say?
Pure compliment. Zero data.
"Don't call me, I'll call you" in disguise.
Sank one founder for $10M. Fluffy future promise.
A meeting just needs to advance — even without a check.
The best meeting conclusion you can hear.
B2B win — they're staking reputation.
Finding conversations
Stop asking for "interviews." Find excuses to talk about a topic you both care about.
Going to them, bringing them to you, immersing yourself.
- Cold outreach (low yield, occasional gold)
- Seizing serendipity at events
- Find a good excuse
- Landing pages → email those who sign up
- Organize your own meetups
- Speaking & teaching
- Industry blogging
- Build helpful tools as bait
- Hang out where they hang out
- Make yourself a regular
- Become part of the community
Choosing your customers
Startups don't starve, they drown. Slice your segment until you know exactly who and where.
From "students" to a who-where pair.
A fuzzy segment causes mixed feedback. Slice until you know who wants it most and where to find them.
- Within this group, who wants it most?
- Why does that sub-set want it? What's their specific motivation?
- Does everyone in the group share that motivation, or only some?
- Which other groups have the same motivation?
"Finance professionals in London training for a marathon, going to the gym at lunch" → reachable.
Running the process
Prep · keep it casual · ask good questions · push for commitment · take notes · review with team.
Before · During · After every conversation.
- Pick a focused segment
- Decide your big 3 learning goals
- Decide ideal commitment
- Do desk research first if possible
- Frame the conversation
- Keep it casual
- Ask Mom-Test questions
- Deflect, anchor, dig
- Take good notes
- Push for commitment & next steps
- Review notes & quotes with team
- Update beliefs and plans
- Decide next 3 big questions
Frame: Vision · Framing · Weakness · Pedestal · Ask.
- 1
Vision
Half-sentence on how you're making the world better.
- 2
Framing
Where you're at and what you're looking to learn.
- 3
Weakness
Where you're stuck — show that you genuinely need help.
- 4
Pedestal
Show that they in particular can provide that help.
- 5
Ask
Ask for help. People want to give it.
Everything on one page.
The Mom Test
- Talk about their life, not your idea
- Specifics in the past, not generics or futures
- Talk less, listen more
Avoid bad data
- Deflect compliments
- Anchor fluff
- Dig beneath ideas, opinions, emotions
Results of a good meeting
- Facts about their life
- Commitment (time, reputation, money)
- Advancement to next funnel step
Watch for these mistakes
- Fishing for compliments
- Exposing your ego
- Slipping into pitch mode
- Being too formal
- Being a learning bottleneck
Going through the motions?
- You're talking more than them
- They're complimenting you
- You don't have notes
- No clear next steps
- You weren't scared by any question
Big prep question
- "What do we want to learn from these guys?"
- Always have your list of 3 big questions
- Be terrified of at least one
It's not their job to tell you the truth. It's your job to find it.
They own the problem. You own the solution. Ask about their life — never your idea — and let the facts do the talking.