Identify your bullseye customer in one day | Michael Margolis (UX Research Partner at GV)

Identify your bullseye customer in one day | Michael Margolis (UX Research Partner at GV)

Lenny's PodcastDec 1, 20241h 29m

Lenny Rachitsky (host), Michael Margolis (guest)

Definition and importance of the bullseye customer vs. ICPThe one-day bullseye customer sprint (5 customers, 3 prototypes, 1 day)Designing ultra-specific inclusion, exclusion, and trigger criteriaRecruiting and screening participants (and why narrow matters)Structuring and running effective qualitative interviewsTeam watch parties, note-taking, and debriefing for fast alignmentCommon blind spots, mispredictions, and when to kill ideas

In this episode of Lenny's Podcast, featuring Lenny Rachitsky and Michael Margolis, Identify your bullseye customer in one day | Michael Margolis (UX Research Partner at GV) explores nail Your Bullseye Customer In One Intense, Insight-Packed Day UX researcher and GV partner Michael Margolis shares a one-day, highly structured sprint for identifying a startup’s “bullseye customer” — the narrowest subset of users most likely to adopt your product early. He argues that most teams stay far too broad, which creates mushy feedback, slow learning, and misaligned roadmaps.

Nail Your Bullseye Customer In One Intense, Insight-Packed Day

UX researcher and GV partner Michael Margolis shares a one-day, highly structured sprint for identifying a startup’s “bullseye customer” — the narrowest subset of users most likely to adopt your product early. He argues that most teams stay far too broad, which creates mushy feedback, slow learning, and misaligned roadmaps.

His framework combines five deep qualitative interviews, three distinct value-prop prototypes, and a full-team ‘watch party’ to compress months of learning into a single day. The process forces teams to define comically narrow inclusion/exclusion criteria, build simple but sharp prototypes, and compare real reactions from carefully screened users.

By focusing on past behavior and genuine excitement—not hypothetical intent—teams quickly see what’s a real “yes,” what’s a polite “no,” and when they should kill or radically reshape ideas. The method is framed as a learning tool, distinct from sales, and is designed to prevent teams from wasting time building products nobody truly needs.

Key Takeaways

Define a bullseye customer that feels “comically narrow.”

Your bullseye is not your total addressable market; it’s the very specific subset most likely to say an enthusiastic yes right now. ...

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Use the 5–3–1 sprint: five bullseye customers, three prototypes, one day.

Cluster five one-hour qualitative interviews into a single day, test three clearly different value propositions, and have the entire core team watch and debrief together. ...

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Anchor on inclusion, exclusion, and trigger criteria when recruiting.

Go beyond demographics: define who must be included, who must be excluded (e. ...

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Prioritize past behavior over hypothetical future usage.

People are poor predictors of what they “would” do; their stories about what they’ve actually done, what failed, and what worked are far more reliable signals. ...

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Test multiple distinct value propositions, not iterations of one idea.

Show three sharply differentiated prototypes so customers can compare and contrast features and tradeoffs, instead of reacting to a single option. ...

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Make research a team sport via watch parties and structured debriefs.

Live-stream interviews, have the team take manual notes, debrief after each session, and end with a personal ‘big takeaways’ form. ...

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Use mispredictions as a map of your blind spots.

Before interviews, ask the team to predict what will happen; afterward, compare predictions to reality. ...

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Notable Quotes

A bullseye customer is the very specific subset of your target market who initially is most likely to adopt your product or service.

Michael Margolis

It should feel comically narrow. If it doesn’t, you’re probably still too broad.

Michael Margolis (reacting to Andy Johns’ framing via Lenny Rachitsky)

This is a learning exercise, not a selling exercise. The mindset is humble inquiry—the gentle art of asking instead of telling.

Michael Margolis

One founder told me the most valuable thing he got was learning what ‘no’ looks like—so he could stop building the wrong thing.

Michael Margolis

If I can’t even find the people you say will buy this, I’m not sure how you’re going to sell to them.

Michael Margolis

Questions Answered in This Episode

How narrow is my current target definition in practice, and could I realistically make it ‘comically narrow’ for learning purposes?

UX researcher and GV partner Michael Margolis shares a one-day, highly structured sprint for identifying a startup’s “bullseye customer” — the narrowest subset of users most likely to adopt your product early. ...

Get the full analysis with uListen AI

If I had to recruit five perfect bullseye customers tomorrow, what concrete inclusion, exclusion, and trigger criteria would I actually use?

His framework combines five deep qualitative interviews, three distinct value-prop prototypes, and a full-team ‘watch party’ to compress months of learning into a single day. ...

Get the full analysis with uListen AI

What would change in our roadmap if we systematically favored what we learned from deep qualitative interviews over investor opinions and internal debates?

By focusing on past behavior and genuine excitement—not hypothetical intent—teams quickly see what’s a real “yes,” what’s a polite “no,” and when they should kill or radically reshape ideas. ...

Get the full analysis with uListen AI

Which ideas or features are we keeping alive today that a one-day bullseye sprint might tell us to kill or radically reshape?

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How could we adapt this 5–3–1 approach to our context (e.g., enterprise, healthcare, biotech) where customers are harder to reach or highly specialized?

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Transcript Preview

Lenny Rachitsky

(instrumental music) You have done 30 years of work, and iteration, and refinement. You're here just to tell us, "Here's the most important thing you need to know and here's how to do it, based on all that time I've spent." Help us understand, what is a bullseye customer?

Michael Margolis

Every ambitious founder wants to build a product for everybody, but it doesn't start there. Amazon started just selling books or Facebook with just profiles for college students. So a bullseye customer is the very specific subset of your target market who initially is most likely to adopt your product or service.

Lenny Rachitsky

Why this of all the things that you can focus on of a startup journey?

Michael Margolis

It helps you get really deep in understanding who are those people and understanding what they need. It helps you prioritize the feedback you're getting and it just gets everybody, as a team, much more aligned on what are we doing and what are we doing first?

Lenny Rachitsky

So you have this bullseye customer sprint that your book describes. You basically give people a, a plan for how to figure this out in a day, which sounds like a dream.

Michael Margolis

The basic formula, the way I think about it is, is five and three and one. So it's five bullseye customers and three very simple prototypes, and then we conduct those interviews in one day while the whole team is watching and debriefing and kind of thinking about what are the key big takeaways at the end of that.

Lenny Rachitsky

Where do you start?

Michael Margolis

So step one is... (instrumental music)

Lenny Rachitsky

Today my guest is Michael Margolis. Michael has been a UX researcher at Google Ventures for almost 15 years where he's worked with over 300 companies to help them get unstuck, move faster, and build something that people want. He helped develop the design sprint method made famous by the book Sprint, and more recently wrote a book called Learn More Faster: How to Find Your Bullseye Customer and Their Perfect Product, which essentially helps you identify and refine your ideal customer profile in a single day. I've said many times on this podcast that one of the biggest mistakes founders make, and product teams make, is not being very clear and very narrow with their initial target market. And I've been looking for a book and a guide to help people figure this out. This book is that. And also this book is completely free and available online as a PDF. Michael is not looking to sell books or drive leads to Google Ventures. He generally simply wants people to avoid pain and avoid wasting time building something that nobody needs. In this episode, we go step by step for how to identify your bullseye customer, how to interview people, how to recruit people, and how to refine your idea to build something that people actually want. This episode is both for founders and also for product teams at larger companies who want to avoid building something that nobody cares about. If you enjoy this podcast, don't forget to subscribe and follow it in your favorite podcasting app or YouTube. It's the best way to avoid missing future episodes and it helps the podcast tremendously. With that, I bring you Michael Margolis. (instrumental music) Michael, thank you so much for being here and welcome to the podcast.

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