PostHog

PostHog is the open source analytics suite that wants to replace your entire Mixpanel + Hotjar + LaunchDarkly + Amplitude stack. Product analytics, session recording, feature flags, A/B testing, and surveys — all in one platform, all self-hostable.

For indie hackers, the free cloud tier (1M events/month) is generous enough to validate a product. The combination of analytics plus feature flags plus session replays means fewer tools, fewer integrations, fewer bills. Mixpanel does analytics better. Hotjar does recordings better. But nobody else bundles everything at this price (free).

Best for early-stage founders who need product analytics without vendor sprawl. The event autocapture means you get data before you even instrument your code.

The catch: the license is proprietary (not truly OSS despite the branding). Self-hosting is resource-heavy — you'll need a decent server. And the all-in-one approach means each feature is good-not-great. If you need deep funnel analysis, Amplitude is sharper. If you need serious A/B testing, use a dedicated tool.