AARRR (Pirate Metrics)
The five stages of the customer lifecycle — Acquisition, Activation, Retention, Referral, Revenue — mapped as a funnel so you can see exactly where users are gained and lost.
▸ Try the interactive toolThe framework
The AARRR framework — nicknamed Pirate Metrics for the sound of the acronym — was created by investor Dave McClure to map the five stages of the customer lifecycle: Acquisition, Activation, Retention, Referral, and Revenue. Each stage asks one question, tracked by its own metrics, and together they form a complete picture of where users are gained and lost.
AARRR's power is that it turns “growth” from a vague aspiration into a diagnosable funnel. When growth stalls, the framework tells you which stage is leaking — and a leak at Activation needs a completely different fix than a leak at Retention. Most teams over-invest in Acquisition (the top, most visible stage) while the real problem sits lower in the funnel.
Acquisition — how do users find you? · Activation — do they have a great first experience? · Retention — do they come back? · Referral — do they tell others? · Revenue — do they pay?
Try it yourself
What it prevents
“We need to grow” is not an actionable statement. AARRR breaks growth into five stages so you can find the one that's actually broken.
| The shortcut | What it costs | What it gives you instead |
|---|---|---|
| Treating growth as one number | “Growth is down” gives no clue what to fix. | Five stages localise the leak to a specific point in the lifecycle. |
| Over-investing in Acquisition | Pouring money into the top while users leak out the bottom. | The funnel shows that fixing Activation or Retention often beats buying more traffic. |
| Vanity at the top | Big signup numbers hide a broken middle. | Stage-by-stage metrics expose where the impressive top number quietly evaporates. |
| No shared growth language | Marketing, product, and sales each optimise a different thing. | AARRR gives every team a shared map of where their work sits. |
Step by step
Define one key metric per stage
For your product, pick the single clearest measure of each stage — e.g. signups (Acquisition), reaching first value (Activation), week-N return (Retention), invites sent (Referral), paying conversion (Revenue).
Instrument the funnel
Make sure each stage is actually tracked. An un-instrumented stage is a blind spot where users vanish without a trace.
Measure the drop-off between stages
The conversion rate from each stage to the next is the diagnostic. A cliff between Acquisition and Activation means people sign up and never reach value.
Find the biggest leak
Don't optimise the stage that's easiest or most visible — optimise the one losing the most users relative to benchmark. That's usually not the top.
Fix, measure, repeat
Improve the leaking stage, watch the downstream effect, then move to the next-biggest leak. Growth is sequential plumbing, not a single heroic push.
A short illustration
A team frustrated by flat growth kept buying more ads — more Acquisition. Mapping AARRR showed Acquisition was healthy: plenty of signups. The cliff was at Activation — most new users never reached the product's first moment of value, so Retention had almost nothing to retain.
Every extra dollar of Acquisition was pouring users into a bucket with a hole at the Activation stage. Redirecting effort to the first-run experience lifted Activation, and Retention and Revenue rose behind it without a single extra ad.
The funnel scorecard
The deliverable is the five-stage funnel with a metric and a conversion rate at each step — read as a leak detector.
| Stage | Asks | Example metric |
|---|---|---|
| Acquisition | How do they find us? | Signups, traffic by channel |
| Activation | Great first experience? | % reaching first value |
| Retention | Do they return? | Week-N / month-N active |
| Referral | Do they tell others? | Invites sent, viral coefficient |
| Revenue | Do they pay? | Conversion to paid, ARPU |
Why it matters
Growth isn't one lever — it's five, and only one is usually broken at a time. AARRR's value is telling you which, so you stop optimising the stage that's already fine.
The recurring lesson is that Retention, not Acquisition, is where durable growth lives. A leaky funnel with great Acquisition just loses users faster and more expensively. Fixing the funnel from the bottom up — Retention first, then Activation, then Acquisition — compounds, because every user you keep is one you don't have to re-acquire. AARRR makes that order visible instead of letting the loudest, most visible stage (Acquisition) absorb all the attention.
Common mistakes
The top stage is the most visible and the most tempting — and often not the leak. Follow the drop-off, not the instinct.
An untracked stage is where users vanish invisibly. Measure all five.
Big signup numbers mean little if Activation and Retention leak. Read the whole funnel.
Stages interact — weak Activation starves Retention. Fix in funnel order, watching downstream effects.
When not to use it
- Pre-product / pre-users. With no funnel yet, AARRR is a planning sketch, not a measurement — don't over-engineer it.
- The product isn't a self-serve funnel. Heavy enterprise sales follow a different motion; AARRR may need adaptation or a different model.
- As the only lens. AARRR maps the lifecycle but doesn't capture depth of value — pair it with a North Star and engagement metrics.
Where this sits in the toolkit
The North Star usually sits at the Activation/Retention core of the funnel — AARRR is the funnel the North Star anchors.
Module 5 goes deep on each stage — funnel diagnostics, retention curves, cohort analysis.
The biggest leak points to where ICE/RICE experiments will have the most impact.
Revenue and Acquisition stages link to LTV/CAC — whether growth is actually profitable (Module 2 & 5).
Map a product you know to AARRR
Pick a product and name one metric for each of the five stages — even a rough guess. Then ask: which stage do you suspect leaks most?
Now consider where that product's team seems to spend its energy (usually visible Acquisition: ads, launches). Does it match the likely leak?
The gap between where a team spends and where the funnel actually leaks is the single most common growth mistake — and the easiest to spot once you've drawn the five stages.
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