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AARRR - Acquisition, Activation, Retention, Referral, Revenue. Dave McClure coined the framework in 2007 and the pirate nickname stuck. It’s become one of the most widely used mental models for understanding where a product is healthy and where it’s leaking 🏴‍☠️

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The five stages

Acquisition - how do people find you? Organic search, paid ads, word of mouth, partnerships. The metric is typically new visitors or sign-ups from each channel. The question: which channels bring the highest-quality users, not just the most? Activation - do new users have a great first experience? This is the “aha moment” - the point where a new user gets enough value to want to come back. Activation is often the highest-leverage stage to improve because everything downstream depends on it 💡 Retention - do users come back? The percentage of users who return after their first session, measured over time. Retention cohort analysis tells you whether your product has a habit-forming core or whether users try it once and disappear. Referral - do users tell others? NPS, viral coefficient, referral programme performance. The most capital-efficient form of growth when it works because your customers do the acquisition for you. Revenue - do users pay? Conversion from free to paid, ARPU, LTV. Often measured last but should inform decisions at every stage - a channel that acquires users who never convert is not a good channel regardless of volume.

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How to use it

AARRR is most useful as a diagnostic tool. Map your current metrics against each stage and look for where the biggest drop-offs are. That’s where to focus. Most products have one stage that’s dramatically weaker than the others - often activation. Teams instinctively work on acquisition because it’s visible and exciting. The more valuable work is usually fixing the leaky bucket further down the funnel 🙌 Lean Analytics covers AARRR in depth and adds the useful discipline of finding the one metric that matters most at each stage of your company’s growth - rather than tracking all five equally at all times. Lesson learned: the teams I’ve seen get the most from AARRR are the ones who instrument all five stages before trying to optimise any of them. You can’t fix what you can’t see.