Tool · Reference documentation plus free product

Amplitude Retention Analysis (chart documentation)

Amplitude · Amplitude Docs Freemium Beginner

Benchmarks only matter once you can plot your own cohorts and see whether your curve is flattening, and Amplitude's Retention Analysis chart does exactly that on real user data. Amplitude has a free Starter plan that covers basic retention and cohort analysis, so a pre-seed team can run this without spending anything. Start by wiring in a few key events, then read the curve shape the way the essays describe.

• Point it at the action that defines an active user, then read whether later cohorts hold or decay.
• The free Starter plan is enough to plot flattening curves for an early product, so cost is not a blocker.
• A steep early drop followed by a plateau is the pattern to look for, echoing the flattening curve idea in practice.