How we recommend your North Star Metric.
No black box. The frameworks we draw from, the 14 metrics we consider, the math behind the recommendation, and what this tool deliberately doesn't do.
01·Definition
What is a North Star Metric?
A working definition, plus the four traits every effective North Star Metric shares.
Working definition
The single number that best captures the core value your product delivers to customers — and that predicts long-term sustainable growth.
Four traits make one work
01
It represents customer value
Goes up only when customers get more out of the product — not because of accounting or marketing timing.
02
It's a leading indicator
Predicts revenue rather than reports it. Monthly revenue is lagging; engagement, retention, and unit economics tend to be leading.
03
Your team can move it
Responds to things your product and growth teams can change directly — not just market conditions you don't control.
04
It's expressible in plain language
If you can't explain it to a non-technical teammate in one sentence, it's probably a composite that should be broken into separate inputs.
02·Positioning
Why this tool exists
Most North Star Metric writing stops at the textbook answer. Here's what this tool does instead.
A definition and a shrug.
Most North Star Metric writing stops at the textbook answer and ten famous examples — useful as theory, useless on Monday morning when you have to put one number on the wall.
- Generic definition — useful as theory, useless on Monday
- Ten famous examples (Spotify minutes, Airbnb nights) you can't copy
- “Go pick yours” — no method, no decision rule
- Static page — same article in 2024 and 2034
- Same answer regardless of stage, shape, or pricing
An engine-backed recommendation.
A live diagnostic that sits on top of 14 system-defined metrics — every recommendation is something we can actually compute against your data, or honestly flag as External.
- Engine-backed bank of 14 metrics with real equations
- Stage × archetype × monetization unit — every variable matters
- Personalized brief plus a 90-day validation plan
- Connects to your dashboard, surfaces the drivers
- Re-runnable any time your context changes
03·Lineage
The frameworks we draw from
Four canonical voices on the North Star Metric. Each shaped a different part — the right column shows what we adopt.
Sean Ellis
Established the 'one number to align around' doctrine.
Cutler & Johns · Amplitude
Distinguished value events from revenue outcomes; introduced the 'inputs' structure.
Brian Balfour · Reforge
Argued for a constellation: acquisition + retention + monetization, not one number.
Lenny Rachitsky
Grounded North Star Metric theory in what real companies actually pick — six empirical categories.
04·Stance
Why we recommend one number
The strongest critique of the single-metric doctrine deserves a direct answer.
01
Balfour is right.
Over-optimizing one number tends to break another. LinkedIn chased ad-revenue per user and quietly killed long-term engagement. Slack teams chasing DAU could grow active users that never paid.
02
We still recommend one.
A pre-revenue founder needs to know what to put on the wall on Monday. “Three metrics in concert” is paralysis at that stage. The brief surrounds the North Star Metric with a counter-metric so you can defend it, and a 90-day plan so you can act on it.
03
Switch at $1M MRR.
Below the line, the brief is calibrated for the founder still picking up the compass. Above, Balfour’s constellation — acquisition, retention, monetization — becomes the right next step.
05·The Inputs
What we ask, and why
Seven questions because picking the right North Star Metric depends on seven variables. Each narrows the candidate pool — and maps to a canonical source.
- 0111 / 14
Which best describes your business?
Highest-signal variable — every canonical source treats archetype as the primary input.
All 4
- 028 / 14
Who buys, and how?
B2B vs B2C and PLG vs sales-led shift which North Star Metrics are even on the table.
Lenny + Balfour
- 036 / 14
What does a customer pay for?
The verb of the North Star Metric flips on this. Slack used 'paid teams' because that's what they monetized.
Amp · Lenny · Balfour
- 045 / 14
How do new users first enter?
Routes between freemium-friendly and trial-friendly North Star Metrics — not interchangeable.
Lenny
- 054 / 14
Where are you on the journey?
Companies change their North Star Metric as they mature — engagement → paid users → paid teams.
Lenny
- 063 / 14
Annual revenue per customer?
5-at-$50K vs 5,000-at-$50: same MRR, different right North Star Metric (CLV-fit vs MRR-Movement-fit).
Balfour
- 072 / 14
How often do customers get value?
Whether engagement-style North Star Metrics belong on the table at all.
Balfour
- →1 / 14
Recommended North Star Metric
The diagnostic
Seven questions. Your North Star.
Five minutes to narrow the 14 candidates down to one — yours.
Take the diagnostic06·The Bank
The 14 metrics we consider
Fourteen metrics organized by Lenny's empirical category schema — five of his six categories; User Experience is deliberately excluded (see §10). Eight are Native to our engine; six are honestly flagged External.
Revenue
5 metrics
Customer Growth
4 metrics
Consumption Growth
2 metrics
Engagement Growth
2 metrics
Growth Efficiency
1 metric
P · E · G · M = stages eligible (Pre-revenue · Early · Growth · Mature)
07·The Experience
The 5-stage flow
Seven context questions, one hypothesis, four pressure-tests, six seconds of analysis, and the brief — about 5–7 minutes total.
Context
~ 3 min
Archetype, sales motion, monetization unit, free-tier mechanic, stage, ACV, cadence.
7 questions
Hypothesis
~ 30 sec
Before we tell you ours, you tell us yours. Committing to a guess changes how you read the result.
1 question
Pressure test
~ 90 sec
Counter-metric, vanity, value-event literacy, team alignment. Skipped on "Other" or "Not sure".
4 questions
Analysis
~ 6 sec
Six seconds of compass animation while we compute the score. Deterministic math, not theater.
compute
Brief
Output
Driver tree, counter-metric, 90-day plan, and the agent that watches the metric for you.
read & share
08·The Math
The scoring formula
Open math, not a black box. Each row's background fill shows how much that component can swing the score.
score =
base + acv_bonus + cadence_bonus + monetization_match + hypothesis_bonus − pressure_penaltiesbase + acv_bonus + cadence_bonus + monetization_match + hypothesis_bonus − pressure_penalties
baseStage × Archetype × Sales motion. Marketplace → GMV (+4). Enterprise sales-led at growth → CLV. Per-seat SaaS → Paid Seats.
acv_bonusHigh ACV ($50K+) → +3 CLV, +2 NRR/GRR. Low ACV (<$1K) → +2 MRR Movement, +1 LTV:CAC.
cadence_bonusDaily-cadence → +2 WAU + Engagement Time. Event-driven → +1 Consumption. Monthly → no bonus.
monetization_match+2 when the North Star Metric literally counts what the customer pays for. The cleanest signal: metric IS the value exchanged.
hypothesis_bonusYour hypothesized North Star Metric gets +2 if it's eligible. Ineligible → no bonus and an explainer in the brief.
pressure_penaltiesCounter-metric (−1), vanity (−2), outcome-vs-value (−1), team alignment (−2). Each is the maximum for that question.
Tie-breakhypothesis_match → base_weight
NoteEach penalty number is the maximum — partial-signal answers apply smaller penalties.
09·The Diagnostic
The 4 pressure-test questions
Four ways a candidate metric loses points — each question stress-tests one habit every founder should have about their North Star.
D1 · Counter-metric awareness
“If you doubled your metric tomorrow but everything else stayed flat, what's the first bad thing that could happen?”
When appliedPenalty if you can't name what you'd watch alongside.
D2 · Vanity-metric exposure
“Tell us about a month you hit your metric target but the company felt worse.”
When appliedPenalty if a recent target hit didn't translate to felt progress.
D3 · Value-event vs outcome literacy
“Is your metric something your customers DO, or something that HAPPENS as a result?”
When appliedPenalty if the metric tracks an outcome rather than a customer action.
D4 · Operational alignment
“When the team gathers around your metric, you're usually:”
When appliedPenalty if the team is debating definitions instead of acting.
10·Honesty
What this tool isn't
Knowing the limits keeps the tool useful where it actually is. Four things the brief is explicitly not.
Substitute for cohort analysis
The right North Star Metric doesn't replace looking at how each monthly cohort retains, expands, or churns.
Replacement for strategy debate
The brief is a starting position, not a decree. The leadership team has to agree on it.
Permanent answer
Reassess every 12–18 months or after any meaningful business-model change.
Substitute for your finance dashboard
North Star Metrics are leading indicators; your P&L is the source of truth on health.
11·Cadence
When to reassess your North Star
The recommendation is right for today, not forever. Four triggers tell you when to re-run it.
Every 12–18 months
Default cadence — even when nothing else has changed, the broader business has.
After a business-model pivot
Dropbox: MAU → paid customer growth as they went B2B. Spotify: revenue → consumption when podcasts launched.
When you cross a stage boundary
Pre-revenue → early. Growth → mature. Different stages, different priorities, different right answers.
When the team starts debating it
When someone questions whether the current metric is right, that debate is the signal.
12·Sources
Sources
The canonical writing on the North Star Metric. Every claim above traces to one of these.
Find your North Star Metric.
Five minutes of context, one candidate metric, and a 90-day plan to validate it — backed by the same engine that powers your dashboard.