AARRR

The pirate metrics funnel: Acquisition, Activation, Retention, Referral, Revenue, five stages that locate where a product leaks growth.

AARRR, read aloud as pirate metrics, is investor Dave McClure's framework for cutting a growth problem into five measurable stages. Acquisition: where visitors come from. Activation: the share who reach first value. Retention: the share who come back. Referral: the share who bring others. Revenue: the share who pay. The sequence varies by author, Revenue sometimes third, the value does not: it forces you to name the bottleneck stage instead of gesturing at growth, because the fix for weak acquisition, marketing, is useless if activation is the leak, and no funnel improves by fixing stage four while stage two drains.

Why it matters to an indie builder: the framework's gift is diagnosis before spending. Most product debates, more features versus more marketing versus lower price, dissolve once the funnel is measured, because each remedy maps to exactly one stage. A solo founder with conversion at 1 percent and activation at 55 percent has an acquisition problem; the same 1 percent with activation at 8 percent has an onboarding problem, and the two call for opposite quarters of work. Guessing wrong between them is the most expensive common mistake in indie growth.

A concrete example: a file-sharing tool signs up 2,000 visitors monthly and converts 34 to paid, 1.7 percent, and the founder plans ads. The funnel first: activation is 12 percent, most signups never complete the first share, while of those who do activate, 46 percent eventually pay. The leak is stage two, not stage one, and ads would pour traffic into the same hole. Six weeks of onboarding work, a default recipient and a prefilled first share, lift activation to 31 percent: paid conversions rise to 118 monthly from the same 2,000 visitors, a 3.5x improvement worth more than a five-figure ad budget and delivered for the price of measurement and attention.

Common mistakes: measuring every stage monthly instead of cohort-wise, where the leaks actually segment, optimizing the stage that is easiest rather than the one that leaks, a chronic form of procrastination, treating the funnel as one-time diagnosis when it is a standing dashboard, and copying stage benchmarks across business models, a consumer app's healthy activation and a B2B tool's share no scale. Each stage has its sibling entry here, ctr, ttv, churn, nps, mrr; the analytics blocks on IndieBoot compute the whole funnel from one SDK.