AARRR Framework (Pirate Metrics)
A growth framework that organizes the customer lifecycle into five stages: Acquisition, Activation, Retention, Referral, and Revenue, providing a structured approach to identifying and fixing growth bottlenecks.
The AARRR framework, created by Dave McClure, provides a simple map of the customer journey. Acquisition measures how users find you. Activation measures their first value experience. Retention measures whether they come back. Referral measures whether they bring others. Revenue measures whether they pay. Each stage has its own metrics, and the biggest bottleneck determines where to focus.
The power of AARRR is diagnostic. By measuring conversion rates between stages, you identify where users drop off. If acquisition is strong but activation is weak, invest in onboarding. If activation is strong but retention drops, focus on habit formation and ongoing value delivery. If retention is strong but referral is low, build sharing mechanics. This systematic approach prevents the common mistake of throwing money at acquisition when the real problem is downstream.
While AARRR provides the framework, the specific metrics at each stage depend on your product. For a B2B SaaS product, acquisition might be trial signups, activation might be connecting a data source, retention might be weekly active usage, referral might be team invitations, and revenue might be conversion to paid plan. Define your specific AARRR metrics, measure the conversion rates, and focus relentlessly on the weakest link in the chain.
Related Terms
Growth Loop
A self-reinforcing cycle where each cohort of users generates inputs (data, content, referrals) that attract the next cohort, creating compounding growth.
Churn
The rate at which customers stop using or paying for a product over a given period, typically measured as monthly or annual churn percentage.
Activation Rate
The percentage of new signups who complete a key action (the 'aha moment') that correlates with long-term retention and product value realization.
Product-Led Growth (PLG)
A go-to-market strategy where the product itself drives acquisition, activation, and expansion through self-serve experiences rather than sales-led motions.
Viral Coefficient (K-Factor)
The average number of new users each existing user brings to the product, where a K-factor above 1.0 indicates self-sustaining viral growth.
Net Revenue Retention (NRR)
The percentage of recurring revenue retained from existing customers over a period, including expansion, contraction, and churn — where 100%+ indicates growth without new customers.