Lenny's PodcastMichael Margolis: Why bullseyes beat ICP personas in one day
Through five qualitative interviews and three prototypes in one day; team watch parties hit data saturation fast and reveal who's a real bullseye yes.
At a glance
WHAT IT’S REALLY ABOUT
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.
IDEAS WORTH REMEMBERING
5 ideasDefine 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. Over-broad definitions lead to mushy results and make it hard to know what’s actually working.
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. This clustering reveals patterns quickly and builds shared conviction without long reports.
Anchor on inclusion, exclusion, and trigger criteria when recruiting.
Go beyond demographics: define who must be included, who must be excluded (e.g., experts, edge cases, locked-in competitors), and what trigger events make someone especially ready to adopt (like having a baby for life insurance).
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. Use the first half of each interview to deeply probe real, past experiences.
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. You’re not looking for a “winner” as much as the best Lego pieces to recombine into a stronger concept.
WORDS WORTH SAVING
5 quotesA 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
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