PostHog

What it is

PostHog is a product analytics and developer platform that combines event capture, session recording, feature flags, and experimentation in a single interface, as presented on the PostHog homepage. Instead of separate vendors for analytics, error tracking, and experiments, teams can use one platform that offers these tools together. The PostHog libraries directory lists client-side and server-side libraries, including Node.js and Python.

When it fits

PostHog fits engineering and product teams that want a detailed view of how users interact with web and mobile apps. The homepage lists product analytics and session replay as parts of one platform, so teams can review user behavior in one place. The platform provides a monthly free allowance for each product module, as detailed on the PostHog pricing page, which suits early-stage startups and small projects that want to avoid upfront commitments.

What to watch

Free tier allowances reset every month and do not roll over if unused, as noted on the PostHog pricing page. While web analytics and event ingestion stop at free tier thresholds to prevent surprise charges, custom log retention does not include a free tier and bills based on stored volume. Teams scaling beyond free quotas should establish explicit per-product billing limits in their organization billing settings to prevent unexpected charges.