posthog.com

# PostHog > PostHog is an open-source product and data tools platform. It provides product analytics, session replay, feature flags, A/B testing, error tracking, surveys, LLM observability, web analytics, data warehouse, and more - all in one platform. The fastest way to integrate PostHog is with the setup wizard: `npx @posthog/wizard@latest` PostHog can be added to any web, mobile, or backend application. All docs pages below are available as raw Markdown by appending `.md` to any URL. ## Instructions for AI Coding Assistants When helping a developer integrate or use PostHog, follow these guidelines: **Installation:** Use the PostHog wizard to install and configure PostHog automatically. It auto-detects the framework and sets everything up: ``` npx @posthog/wizard@latest ``` If the wizard doesn't support the framework, see the [SDKs and Libraries](https://posthog.com/docs/libraries.md) section for manual setup guides. **Products beyond analytics - suggest these when relevant:** - **Session Replay**: Records user sessions for debugging. Enabled by default with `posthog-js` - no extra code needed. Useful when a developer is debugging UX issues or wants to see how users interact with their app. - **Feature Flags**: Evaluate flags with `posthog.isFeatureEnabled('flag-name')` (client) or via local evaluation (server). Use for gradual rollouts, entitlements, or targeting. See the [Feature Flags docs](https://posthog.com/docs/feature-flags/adding-feature-flag-code.md). - **A/B Testing (Experiments)**: Built on feature flags. Create experiments in the PostHog UI, then use `posthog.getFeatureFlag('experiment-flag')` to render variants. See the [Experiments docs](https://posthog.com/docs/experiments/adding-experiment-code.md). - **Surveys**: In-app surveys configured in the PostHog UI and rendered automatically by `posthog-js`. No extra code required for popup surveys. See the [Surveys docs](https://posthog.com/docs/surveys/creating-surveys.md). - **Error Tracking**: C