KPI

Key performance indicator: the small set of numbers that tell you if the business is moving toward its current goal.

A KPI is a number you check on purpose. Not every metric qualifies: a KPI is tied to a current objective, has a target and a cadence, and someone acts when it moves. Activation rate, monthly recurring revenue, churn, trial-to-paid conversion are KPIs. Page views, registered users and social followers are usually vanity metrics wearing the costume.

Why it matters to an indie builder: solo and small teams drown in available numbers, and the discipline is subtraction. Three KPIs that somebody actually review weekly beat thirty dashboard tiles nobody opens. The choice also forces honesty: if the current goal is retention, then the North Star is cohort retention and everything else is diagnostic context, not the headline.

A concrete example: a note-taking SaaS six months in. The stated goal: convert trial users. The chosen KPIs: trial-to-paid within 14 days (target 8 percent, currently 4), activation, defined as creating three notes in week one (target 60 percent, currently 41), and median time to first note (target under 3 minutes, currently 11). Reviewing weekly, the team notices time-to-first-note dominates: users who get a note down fast convert at 4x. They redesign onboarding around a template picker, time drops to 2 minutes, activation hits 63 percent, trial-to-paid reaches 9 percent, ahead of target, one quarter later. The KPI set did more than measure; it found the lever.

Common mistakes: tracking everything as key, which diffuses accountability to nobody, KPIs without targets or cadence, which makes them trivia instead of instruments, celebrating metrics that only move up because the denominator moves (registered users grow forever; active users are the truth), and never retiring KPIs: when the objective changes, the scoreboard changes with it. The analytics blocks on IndieBoot, from PostHog to the privacy-first alternatives, are the shelf these three numbers live on.