What Are Pirate Metrics (AARRR)? | Vantage
Pirate Metrics (AARRR) Pirate metrics, or AARRR (named for the pirate sound), is a framework developed by Dave McClure for measuring the customer lifecycle. It breaks the funnel into five stages: Acquisition (how users find you), Activation (how users experience first value), Retention (how users come back), Referral (how users bring others), and Revenue (how users pay).
Why pirate metrics (aarrr) matters
AARRR provides a simple framework for understanding where in the funnel your product is weak. If acquisition is strong but activation is low, the problem is onboarding, not marketing. This diagnosis prevents the common mistake of investing in the wrong stage.
How it works
Define a metric for each stage: Acquisition (signups per week), Activation (% who reach aha moment), Retention (D30 return rate), Referral (viral coefficient), Revenue (conversion to paid). Track each metric over time. Identify the weakest stage and focus product effort there. Fixing the weakest stage has the highest leverage.
Common mistakes
Optimizing acquisition when activation is the bottleneck (pouring water into a leaky bucket)
Not defining what activation means for your product
Measuring all five stages but not prioritizing the weakest one
Treating the stages as linear when users can loop back
Related terms
How Vantage relates
Vantage connects to your analytics data, so AARRR metrics can inform product specs. When you create a project to fix a specific funnel stage, the AI grounds the PRD in your actual funnel data for that stage.