Pirate Metrics (AARRR Funnel)
プルト・ムトルイクス
Pirate Metrics (AARRR) breaks growth into Acquisition, Activation, Retention, Referral, and Revenue to locate bottlenecks.
Pirate Metrics is a funnel framework that organizes user behavior into five stages: Acquisition, Activation, Retention, Referral, and Revenue. It helps teams diagnose where growth is leaking and prioritize improvements. Clear definitions for each stage keep metrics consistent and actionable.
Identifies which stage needs investment and which metrics matter. Sets stage-specific KPIs and targets for teams. Determines whether product, marketing, or success work is the top priority.
- Identifies which stage needs investment and which metrics matter.
- Sets stage-specific KPIs and targets for teams.
- Determines whether product, marketing, or success work is the top priority.
- Define activation precisely to avoid misleading results.
- Weak retention undermines improvements in acquisition.
- Referral depends on user value and trust.
- Revenue is a late-stage metric; upstream fixes often drive it.
- Stage definitions should be reviewed as the product evolves.
An education app maps its funnel and finds low activation: only 35% complete the first lesson. The team simplifies onboarding and adds reminders. Activation improves to 55%, which lifts retention and revenue without increasing ad spend. The team reviews outcomes with stakeholders and updates the plan, which stabilizes results over time.
Compare Pirate Metrics (AARRR Funnel) with adjacent concepts before deciding. Pirate Metrics (AARRR Funnel) | Current concept | Use when the team needs the primary decision lens Adjacent metric or framework | Supporting lens | Use when the team needs evidence or process detail General vocabulary | Broad explanation | Use only for orientation, not final decision-making
| Metric | Difference | Why read together |
|---|---|---|
| Pirate Metrics (AARRR Funnel) | Current concept | Use when the team needs the primary decision lens |
| Adjacent metric or framework | Supporting lens | Use when the team needs evidence or process detail |
| General vocabulary | Broad explanation | Use only for orientation, not final decision-making |
- The same AARRR metrics apply to every business without adjustment.
- Acquisition is always the main problem.
- Once set, AARRR metrics never need revision.
When should I use Pirate Metrics (AARRR Funnel)?
Use it when the team needs to decide scope, priority, owner, or trade-off, not when it only needs a short definition.
What makes Pirate Metrics (AARRR Funnel) useful in practice?
It becomes useful when it is tied to evidence, a decision owner, and a concrete next operating choice.
What should I avoid?
Avoid using the term as a label without clarifying assumptions, boundaries, and how success will be judged.