PostHog
Product analytics, flags, replay, and errors in one MIT-core stack
Observability / Product Analytics · Freemium · 40.4k
Reviewed 2026-09-03 · last push 2026-10-21 · repo checked 2026-10-21
What's Good
MIT for everything outside ee/. Cloud README states the first 1 million events, 5k recordings, 1M flag requests, 100k exceptions, and 1500 survey responses are free every month, then usage-based. Same product self-hosted if you want the bill to be your cluster. EU Cloud exists. This is analytics plus flags, replay, surveys, and error tracking — not a page-view pixel.
The Catch
ee/ is a separate proprietary license. posthog-foss strips it if you need a clean MIT tree. Self-hosting is a Postgres + ClickHouse ops job. Cloud is usage-metered after the free allowances; replay is usually the line that bites first.
Verdict
The honest Mixpanel/Amplitude alternative. MIT core, real free Cloud, ee/ is not MIT.
Embed
Maintainer? Add the badge to your README. It is free, links to this review, and there is no paid version.
Markdown
[](https://stackgems.com/gems/posthog)
HTML
<a href="https://stackgems.com/gems/posthog"><img src="https://stackgems.com/badge/posthog.svg" alt="PostHog reviewed on Stack Gems" height="20"></a>