Growth metrics guide
The North Star Metric: How to Choose Yours
One metric to align the whole company — chosen well, it captures the value customers get and predicts sustainable growth. Chosen poorly, it becomes a vanity number everyone games.
A North Star Metric (NSM) is the single measure that best captures the core value your product delivers to customers. The idea, popularized by growth practitioners including Sean Ellis and developed in depth by the team at Amplitude (in the North Star Playbook), is that a company grows fastest when everyone aligns behind one metric that reflects genuine customer value — not a vanity number.
What makes a good North Star
A strong North Star Metric has three properties:
- It reflects customer value. When the metric goes up, customers are genuinely getting more value — not just being counted.
- It predicts sustainable growth. It leads revenue rather than merely following it, so improving it today grows the business tomorrow.
- It is actionable and measurable. Teams can influence it, and you can track it reliably.
Well-known examples
These commonly-cited examples illustrate the pattern (specific internal metrics evolve over time, so treat them as illustrative):
| Company | Illustrative North Star |
|---|---|
| Airbnb | Nights booked |
| Spotify | Time spent listening |
| Facebook (early) | Daily active users |
| Slack | Messages sent within teams |
| Messages sent |
Notice the pattern: each measures an action that equals value received, not a signup count. Nights booked, not accounts created; time listening, not app installs.
How to choose yours
- Define the core value. Finish the sentence: "Our product succeeds when a customer ______." That verb is usually your metric.
- Find the value moment. Which repeated action correlates most strongly with retention and revenue? Map it against your AARRR stages — the North Star often sits in Activation or Retention.
- Pressure-test it. Ask: could we grow this metric while making customers worse off? If yes, it is gameable — refine it.
- Add input metrics. A North Star is driven by a handful of inputs (e.g., breadth × depth × frequency). Teams own the inputs; the company watches the star.
Common mistakes
- Choosing revenue itself. Revenue is an outcome, not a leading indicator of value; it can rise short-term while customer value falls (aggressive discounting, lock-in).
- Choosing a pure vanity metric like cumulative signups or pageviews.
- Having several "North Stars." The point is focus. Multiple stars defeat the purpose.
- Never revisiting it. As the product matures, the metric that best captures value can change. Review it periodically.
North Star vs. KPIs and OKRs
Teams often confuse the North Star Metric with their KPIs or OKRs, and keeping them distinct matters. Your North Star is one durable metric that captures customer value and rarely changes — it is the destination. KPIs are the broader set of health indicators you monitor (churn, CAC, conversion, uptime) so nothing breaks while you chase the star. OKRs are the time-boxed goals a team commits to this quarter, which should ladder up to moving the North Star or one of its inputs. A useful test: if your North Star changes every planning cycle, it is not a North Star — it is an OKR wearing a costume. The North Star provides continuity across quarters and teams; the OKRs and input metrics are how you actually move it. When a team proposes an initiative, the question "which input to the North Star does this improve, and by how much?" quickly separates genuine value creation from busywork.
How it connects to unit economics
A well-chosen North Star should ultimately show up in your unit economics: more value delivered means better retention, which lifts LTV, improves your LTV:CAC ratio, and shortens payback. If moving your North Star does not eventually improve those numbers, it may not be capturing real value. Use the unit-economics calculator to sanity-check that link.
Sources
- Amplitude, The North Star Playbook — framework for defining a North Star Metric and its input metrics, accessed 2026.
- Sean Ellis — popularized the North Star Metric concept in growth practice. Company examples above are illustrative and commonly cited; specific internal metrics change over time.
Frequently asked questions
What is a North Star Metric?
It is the single metric that best captures the core value your product delivers to customers. When chosen well, improving it reflects customers getting more value and predicts sustainable growth.
Should revenue be my North Star Metric?
Usually not. Revenue is an outcome that can rise even as customer value falls (through discounting or lock-in). A good North Star is a leading indicator of value — like nights booked or time spent — that revenue tends to follow.
Can a company have more than one North Star Metric?
The whole point is focus, so a single North Star is recommended. It is supported by a small set of input metrics that individual teams own, but the company aligns behind one star.
How do I choose a North Star Metric?
Define the core value your product delivers, find the repeated action that best correlates with retention and revenue, and make sure the metric cannot be grown while making customers worse off. It often sits in the Activation or Retention stage of AARRR.