PostHog Has a Free Product Analytics Platform — Track Events, Funnels, and Feature Flags Without Sending Data to Third Parties

Why PostHog? PostHog is open-source product analytics you can self-host. Event tracking, funnels, session recordings, feature flags, A/B tests — all in one tool, no data leaving your servers. Quick Start npm install posthog-js import posthog from ' posthog-js ' posthog . init ( ' YOUR_API_KEY ' , { api_host : ' https://app.posthog.com ' }) // Track events posthog . capture ( ' button_clicked ' , { button_name : ' signup ' , page : ' /pricing ' }) // Identify users posthog . identify ( ' user_123 ' , { email : ' user@example.com ' , plan : ' pro ' }) Feature Flags if ( posthog . isFeatureEnabled ( ' new-checkout-flow ' )) { renderNewCheckout () } else { renderOldCheckout () } // With payloads const config = posthog . getFeatureFlagPayload ( ' pricing-test ' ) // { price: 29, currency: 'USD', show_discount: true } React SDK import { PostHogProvider , useFeatureFlagEnabled } from ' posthog-js/react ' function App () { return ( < PostHogProvider client = { posthog } > < MyComponent /> < /P