PostHog

Overview

PostHog is a product analytics platform built for founders and operators who are tired of stitching together five different tools and paying per-seat SaaS tax. It combines session replay, heatmaps, feature flags, A/B testing, and event analytics in one interface—and you can run it on your own infrastructure. Who uses it: Product teams at Series A–C companies, founders who care about data sovereignty, and operators who need to move fast without waiting for Amplitude or Mixpanel to ship a feature flag module. The core operator workflow looks like this: You deploy a feature flag to 10% of users, watch session replays to see where they drop off, run an A/B test on the onboarding flow, and measure adoption across cohorts—all without leaving PostHog or paying per-event overage fees. The self-hosted option means your user event data never touches a third-party server. PostHog's pricing model is usage-based but transparent: you pay for events ingested and stored, not per user or per feature. For early-stage teams, the cloud version starts free with a generous event quota. Self-hosting requires infrastructure overhead (Kubernetes, PostgreSQL, Redis) but eliminates vendor lock-in and gives you full control over data retention. Common operator scenarios: A growth lead runs a cohort analysis to identify power users, then uses feature flags to test a premium tier upsell. A product manager diagnoses why mobile users bounce during checkout by replaying their sessions. An engineer rolls out a risky backend change to 5% of traffic, monitors error rates in real time, and gradually increases the rollout. None of these require context-switching to Segment, LaunchDarkly, or Fullstory. Honest limits: The UI is functional but not as polished as Amplitude. Session replay can be storage-intensive if you're capturing high-traffic products. The feature flag UX is simpler than LaunchDarkly's—no advanced targeting rules or SDKs for every language yet. Self-hosting requires DevOps overhead; cloud is easier but you lose the sovereignty argument. Data export and API coverage are improving but lag behind mature competitors. Alternatives: Amplitude (more mature analytics, higher cost), Mixpanel (better retention cohorts, vendor-hosted), LaunchDarkly (feature flags only, enterprise-grade), Fullstory (session replay focused). PostHog wins if you want to consolidate and own your data; it loses if you need white-glove support or the most advanced segmentation UI. The real win: You stop paying $500/month for three separate tools and start shipping experiments faster because your data lives in one place.