PostHog

Open-source product analytics with session replay, feature flags, and experimentation.

PostHog is an open-source product analytics platform. Strong on funnels, retention, session replay, and feature flags.

Full walkthrough being written.

Common uses

• Track user actions to understand product usage
• Session replay to debug user-reported issues
• Feature flags for gradual rollouts
• A/B test experiments

Setup

VITE_POSTHOG_KEY (client-visible) and VITE_POSTHOG_HOST in vly env vars. Server-side capture optional via POSTHOG_API_KEY (server-only).

Related

Mixpanel

Adjacent product analytics.

Amplitude

Adjacent product analytics.

Sentry

For error tracking.