North Star Metric
A north star metric is the single number that best captures the core value a product delivers to its customers. It acts as the one measure every team aligns behind, chosen because moving it reliably moves long-term revenue and retention. Growth marketer Sean Ellis popularized the term, and Amplitude formalized it into a working framework in its North Star Playbook.
Why a North Star Metric Matters
It settles arguments about priorities. When marketing optimizes signups, sales optimizes closed deals, and product optimizes feature adoption, each team can hit its own target while the business stalls. A shared metric forces those goals to point in the same direction.
It also catches the failure mode revenue targets miss. Revenue is a lagging indicator: by the time it drops, the cause happened months earlier. A north star metric measures delivered customer value, which moves first. Spotify’s listening time falls before subscriptions cancel.
The third benefit is prioritization. Any roadmap item can be scored against one question: will this move the north star metric? Work that cannot answer it gets cut or deprioritized without a debate about whose department matters more.
The North Star Metric Framework
The framework pairs one north star metric with three to five input metrics that teams can directly influence. The north star metric is too broad for any single team to move alone. The inputs are what actually get worked on.
Amplitude groups inputs into four levers:
- Breadth. How many users get value. Weekly active accounts, new activated teams.
- Depth. How much value each one gets. Projects per account, tracks saved per listener.
- Frequency. How often they return. Sessions per week, orders per month.
- Efficiency. How fast value arrives. Time to first successful action, time from signup to activation.
A working north star metric also passes six tests: it expresses customer value, reflects the company vision, leads revenue rather than trailing it, is actionable by teams, is understandable without a data analyst, and is not a vanity number. Cumulative registered users fails the last test, because it can only go up.
North Star Metric Examples
Each of these measures value received, not activity performed.
| Company | North star metric | Value it captures |
|---|---|---|
| Airbnb | Nights booked | A completed stay, the transaction both sides want |
| Spotify | Time spent listening | Attention, which predicts subscription retention |
| Slack | Messages sent within teams | A team actually communicating in the product |
| Zoom | Weekly hosted meetings | Meetings that happened, not accounts created |
| Amplitude | Weekly learning users | Users who acted on an insight, not just logged in |
| Medium | Total time reading | Reading, not page views an ad model would reward |
| Uber | Weekly rides completed | Rides delivered, not app downloads |
| Duolingo | Daily active users | Daily practice, the behavior language learning requires |
Three patterns show up across them. Attention products (Spotify, Medium) measure time. Transaction products (Airbnb, Uber) measure completed exchanges. Productivity products (Slack, Zoom) measure work done in the tool.
For a B2B marketing team, the equivalent is usually sales-qualified opportunities created, not leads captured. A lead is a form fill. An opportunity is value the sales team can act on.
North Star Metric vs KPI
A north star metric is one company-wide number. KPIs are many, and each belongs to a specific team or function.
| North star metric | KPI | |
|---|---|---|
| How many | Exactly one | Several per team |
| Scope | Whole company | Function or campaign |
| Measures | Customer value delivered | Progress against a goal |
| Timing | Leading indicator | Often lagging |
| Target | Direction, tracked over years | A number by a date |
| Changes | Rarely, on strategy shifts | Quarterly or annually |
Every north star metric is a KPI. Most KPIs are not north star metrics. Cost per acquisition is a real KPI for a paid media team and a poor north star metric, because a customer receives no value from it. The relationship is hierarchical: the north star sits above the input metrics, and team KPIs sit under those inputs.
How to Identify Your North Star Metric
- Write down the value customers actually buy. Not the feature list. The outcome they would miss if the product disappeared tomorrow.
- Ask what a successful customer does repeatedly. The behavior that proves value was received, expressed as a countable action.
- List four to six candidates. Include the obvious ones so they can be eliminated on evidence.
- Test each against retention. Pull cohort data and check which behavior separates retained customers from churned ones. That correlation is the strongest signal available.
- Check that it can go down. A metric that only rises, like total signups, hides every problem.
- Confirm every team can influence it. If marketing, product, and support cannot each name an input they own, the metric is too narrow or too abstract.
- Define the input metrics. One per lever: breadth, depth, frequency, efficiency. Assign an owner to each.
- Instrument it before announcing it. The metric needs a single source of truth and consistent campaign tagging, or the weekly number will be disputed instead of acted on.
Marketing usually owns a breadth input, so channel data has to be clean enough to attribute. Consistent UTM tagging is what makes each channel’s effect on the metric visible rather than assumed.
Common Mistakes
- Choosing revenue. It is the outcome the metric should predict, so using it removes the early warning.
- Choosing daily active users by default. DAU works when opening the product is the value, as with Duolingo. For a tax filing tool, daily use signals trouble.
- Picking more than one. Two north star metrics means none. Teams optimize whichever is easier.
- Never revisiting it. Early-stage activation metrics give way to depth and retention measures later.
- Setting it without instrumentation. A metric nobody can reproduce in a dashboard becomes a slide, not a decision tool.
Frequently Asked Questions
Can a company have more than one north star metric?
No, and that is the point of the name. The metric exists to settle tradeoffs when two teams want opposite things, which only works if there is one tiebreaker. Companies with distinct business lines sometimes run one per line. Within a single product, a second north star metric cancels the first.
Is revenue a good north star metric?
Revenue is a lagging indicator, so it makes a weak north star metric. It reports what already happened rather than predicting what is coming, and it rises for reasons that have nothing to do with customer value, such as a price increase that quietly raises churn. Pick the customer behavior that produces revenue and measure that instead.
Who owns the north star metric?
The executive team owns the metric, and individual teams own the input metrics beneath it. Without that split, the north star becomes a poster nobody is accountable for. A common setup reviews the north star monthly at leadership level and the inputs weekly at team level.
How is a north star metric different from OKRs?
A north star metric names what the company measures. OKRs name what it will change in the next quarter. The metric stays stable across many quarters while OKR targets refresh, and healthy OKRs usually attach to one of the input metrics feeding the north star.
To connect campaign performance to the inputs behind your north star metric, tag every link with the free UTM builder at linkutm.