What it is

An all-in-one suite bundling product analytics, session replay, feature flags, A/B tests, surveys and error tracking behind one SDK. Each product carries its own monthly free allowance rather than sharing one pool. The MIT-licensed code can be self-hosted, but PostHog officially does not support self-hosted deployments.

Why it earns a slot

One npm install gives a solo builder analytics, flags, replay and error tracking at once, and the free allowances are large enough that most side projects never pay anything.

Know before you commit

Identified events cost up to 4x more than anonymous ones. Set person_profiles: 'identified_only' or a 5M-event month jumps from roughly $153 to $610. Self-hosted instances get free-tier features only and zero support.

Getting started

npm i posthog-js

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Pricing snapshot

Free: 1M events, 5K session replays, 100K exceptions/mo, 1-year retention. Then usage-based from $0.00005/event and $0.005/replay.

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Drop into your Lovable chat

Evaluate PostHog (https://posthog.com) for this project, then use it only if it fits what we are already building.
Context: Product analytics + replay suite. An all-in-one suite bundling product analytics, session replay, feature flags, A/B tests, surveys and error tracking behind one SDK. Each product carries its own monthly free allowance rather than sharing one pool. The MIT-licensed code can be self-hosted, but PostHog officially does not support self-hosted deployments.
Reviewer notes (general, not written for this codebase): One npm install gives a solo builder analytics, flags, replay and error tracking at once, and the free allowances are large enough that most side projects never pay anything.
Watch out for: Identified events cost up to 4x more than anonymous ones. Set person_profiles: 'identified_only' or a 5M-event month jumps from roughly $153 to $610. Self-hosted instances get free-tier features only and zero support.
Pricing: Free: 1M events, 5K session replays, 100K exceptions/mo, 1-year retention. Then usage-based from $0.00005/event and $0.005/replay.
Setup: npm i posthog-js
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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