How do I measure and analyze retention properly?

The short answer

Use cohort retention curves, not a single churn number: group users by signup period and watch whether the curve flattens to a stable plateau or decays to zero. A flat tail means real, retained value; a curve heading to zero means you don't have product-market fit yet. Segment by behavior to find who actually sticks and why.

Go deeper, your way

2 hand-picked resources. Pick how you want to dig in.

📄 Article

Freemium Intermediate

Why we picked it Concrete retention benchmarks and cohort-analysis methods gathered from dozens of top companies, so you can tell a healthy retention curve from a dying one.

How the Best Companies Measure and Improve Retention

From Lenny's Newsletter by Lenny Rachitsky ~20 min read

Judge retention with cohort curves; a flattening plateau signals real value.
A curve decaying to zero means you don't yet have product-market fit.
Benchmark retention against your category, not against vanity averages.

Open lennysnewsletter.com →

📄 Article

Freemium Intermediate

Why we picked it Lenny distills how the best product teams pick a single North Star that captures real customer value and drives the whole growth model, with concrete company examples.

The North Star Playbook & Choosing Your Growth Metrics

From Lenny's Newsletter by Lenny Rachitsky ~20 min read

A good North Star metric measures delivered customer value, not vanity signups.
Break the North Star into a small set of input metrics you can actually move.
Fewer, well-chosen metrics reviewed weekly beat sprawling dashboards nobody reads.

Open lennysnewsletter.com →

Terms in this answer

Product-Market Fit Retention Churn

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