The Pirate Funnel: find growth for your business with AAARRR

In short: The Pirate Funnel (AAARRR) splits the customer journey into Awareness, Acquisition, Activation, Retention, Revenue and Referral. Measure each stage, find the one where a small improvement adds the most paying customers, run experiments there and repeat every few months. For subscription businesses, the RARRA order (retention first) often works better.

This guide is written by Sprints & Sneakers, a growth marketing agency in Amsterdam that uses the Pirate Funnel in its B2B growth marketing and B2C growth marketing work.

What is the Pirate Funnel?

The Pirate Funnel is a six-stage framework for the customer journey. Dave McClure, founder of 500 Startups, introduced the Pirate Metrics in 2007 to help startups measure growth and improve it step by step. His original model had five stages (AARRR). Many teams now add Awareness as the starting point, which makes it AAARRR. Say it out loud and you get the pirate cry. Hence the name.

The 6 stages are:

1. Awareness. How many people do you reach?
2. Acquisition. How do they become visitors or leads?
3. Activation. How do they first experience value?
4. Retention. How do you keep them coming back?
5. Revenue. How do users become paying customers?
6. Referral. How do customers become brand ambassadors?

The idea goes back to the AIDA model (Attention, Interest, Desire, Action), usually dated to 1898. Where AIDA stops at the purchase, AAARRR continues into retention, revenue and referral. It covers the whole journey, from someone who doesn't know you yet to an ambassador who recommends you. It's one of the core tools of growth hacking and a practical way to run full-funnel marketing.

The 6 stages explained

Stage 1: Awareness

Question. How does your target audience find out that you exist?

Key metrics. Impressions, reach, branded search volume, share of voice, PR coverage, social media mentions.

Growth drivers. Content marketing, SEO, thought leadership, PR, paid awareness campaigns, partnerships.

Common challenge. You're invisible to your best potential customers. Or visible to the wrong audience.

Stage 2: Acquisition

Question. How do aware people become visitors, leads or users?

Key metrics. Website traffic, click-through rates, sign-up rate, lead conversion rate, Cost Per Acquisition (CPA), Cost Per Lead (CPL).

Growth drivers. SEO, paid media, landing page optimization, content gated behind email opt-ins, referral programs.

Common challenge. High traffic but low conversion to leads or sign-ups. Usually a messaging or positioning issue.

Stage 3: Activation

Question. How do new users experience the value of your product for the first time?

Key metrics. Activation rate (% of new users reaching time-to-value), feature adoption in the first 7 days, onboarding completion rate.

Growth drivers. Onboarding flow optimization, product tours, welcome email sequences, in-app guidance, shorter time-to-value.

Common challenge. People sign up and disappear. They never reached the “aha moment” that ties them to your product.

Stage 4: Retention

Question. How do you keep active users coming back and getting value from your product?

Key metrics. Retention rate per cohort, churn rate, Daily, Weekly and Monthly Active Users (DAU, WAU, MAU), engagement score.

Growth drivers. Product features that build habits, email lifecycle marketing, in-app engagement, community building, continuous value delivery. More on this in our guide to retention marketing.

Common challenge. Users drop off after 30 to 90 days. Your product solves a problem they don't face often enough, or you don't deliver value consistently.

Stage 5: Revenue

Question. How do you turn retention into revenue, and how do you increase revenue per customer?

Key metrics. Customer Lifetime Value (CLV), Average Revenue Per User (ARPU), free-to-paid conversion rate, expansion revenue, upsell rate.

Growth drivers. Pricing optimization, upsell and cross-sell flows, tiered plans, feature gating, enterprise packages.

Common challenge. Active users who don't pay, or paying users who don't see enough value to upgrade.

Stage 6: Referral

Question. How do you get satisfied customers to bring in new customers?

Key metrics. Net Promoter Score (NPS), referral rate, K-factor (viral coefficient), share of acquisition from referrals.

Growth drivers. Referral programs, gamification, user-generated content, case studies, word-of-mouth incentives.

Common challenge. Even satisfied customers don't refer anyone. Often they don't know referrals are possible, or the product has no real referral mechanism yet.

How to apply the Pirate Funnel

Step 1: Map your current funnel

Measure the current conversion rate for each stage. A fictional SaaS example:

• 10,000 website visitors per month (Awareness)
• 500 sign-ups (5% conversion, Acquisition)
• 150 activated users (30% conversion, Activation)
• 45 retained users after 30 days (30% conversion, Retention)
• 10 paying customers (22% conversion, Revenue)
• 1 referral per month (10% conversion, Referral)

Step 2: Find the biggest leak

Where do you lose the most? In this example, going from 500 sign-ups to 150 activated users (a 70% drop-off) is the biggest leak in absolute numbers. Lift activation from 30% to 50% and you get 250 activated users instead of 150, which means about two thirds more paying customers without any extra traffic.

The biggest leak isn't always the largest percentage drop. It's the stage where a small improvement has the greatest absolute impact. Run the same calculation for every stage: “If this stage improves by 10%, how many extra paying customers do I get?”

Step 3: Dig into the causes

Why does that stage leak? With activation, think of unclear onboarding, a product that's too complex, wrong expectations set during acquisition, or a missing aha moment. With retention, the product may not solve a problem often enough, competitors may do it better, or perceived value may be low.

Step 4: Test growth hypotheses

Define 3 to 5 experiments for the biggest leak. Prioritize them with ICE scoring (Impact, Confidence, Ease). Agree on success criteria and a significance level (for example p < 0.05) before you start, and scale the winner only when it clears that bar. Need inspiration? See these marketing experiments examples and our guide to conversion funnel optimization.

Step 5: Repeat

Once you've improved one stage, the biggest leak moves somewhere else. Your funnel never stays the same, so repeat the process every 3 to 6 months.

AAARRR vs. RARRA: why retention often comes first

Around 2017, growth practitioners Thomas Petit and Gabor Papp popularized a different order: RARRA (Retention, Activation, Referral, Revenue, Acquisition). The argument is that AAARRR suggests acquisition comes first, while:

• With poor retention, acquisition wastes money. You're filling a leaky bucket. It drains faster than you can pour.
• With poor activation, even the best leads don't convert. First make sure the people already on board experience value.
• Referral is the cheapest form of acquisition. When retention and activation are solid, word of mouth brings growth at low cost.
• Revenue optimization works on everything you already have. Raising revenue per customer in your existing base is often easier than winning the same number of new customers.
• Acquisition comes last. Get the fundamentals right, then scale acquisition, so new customers land in a product that keeps them.

This order suits SaaS and subscription businesses best, where retention economics decide the outcome. For transactional e-commerce, the original AAARRR often works better (see the e-commerce marketing funnel).

The Pirate Funnel in 2026

The framework turns 19 in 2026 and is still widely used. A few updates for applying it today:

Faster analysis. Product analytics tools such as Amplitude, Mixpanel and PostHog make cohort analysis and funnel visualization easy. What took days of manual work in 2007 now takes minutes.

Retention as the main lever. Bain & Company research by Frederick Reichheld, cited in Harvard Business Review, found that a 5% increase in customer retention can raise profits by 25% to 95%. When acquisition gets more expensive, that makes retention the first place to look.

AI-driven personalization. Every stage can now be personalized: activation flows per user segment, retention actions triggered by churn prediction, upsell offers per account.

GEO and AI discovery. Awareness has a new channel: AI search engines. Getting cited in ChatGPT, Perplexity and Claude is part of the job now, through generative engine optimization (or see our GEO service).

Signal-based acquisition. Acquisition can run on signals: outreach triggered by intent data instead of cold lists.

From funnel insight to growth

The Pirate Funnel is a diagnostic tool. It tells you where to invest first. Whether you're a startup looking for product-market fit or an established company sharpening the customer journey, AAARRR shows which stage holds you back.

AI doesn't replace the framework. It makes the data richer and the testing faster, so you can act on what you find sooner. The discipline stays the same: one bottleneck at a time, one experiment at a time.

At Sprints & Sneakers, we map a client's full AAARRR funnel, show where the most customers drop out and turn that into a prioritized experiment roadmap across the relevant channels.