Loading tool details…
Stay free if you only need basic features. Upgrade if you need advanced features. Most solo builders can start free.
PostHog bundles product analytics with session replay, feature flags, A/B experiments, surveys, error tracking, and LLM analytics — all sharing the same event stream and identity graph. Mixpanel and Amplitude focus almost exclusively on analytics; you'd pair them with LaunchDarkly, FullStory, and Sentry to get the same surface. PostHog is also MIT-licensed with a self-hostable version, which neither Mixpanel nor Amplitude offers. The tradeoff is that Mixpanel and Amplitude have deeper cohort and journey analysis for enterprise usage, while PostHog trades some analytics depth for breadth and a lower overall bill.
Yes. The free tier includes 1M events, 5,000 session replays, 1M feature flag requests, and 100k errors per month — enough to run a small-to-mid production SaaS without paying. There's no seat cap, so your whole team can log in. You start paying only when you exceed a specific product's free allotment, and each product meters separately. Most early-stage teams live on the free tier for their first year.
PostHog's LLM analytics wraps OpenAI, Anthropic, and other providers via a small SDK layer and logs traces, model, tokens, cost, and latency alongside product events. It's not as deep as Langfuse or LangSmith for prompt-management or evaluation workflows, but it's the easiest way to have LLM metrics in the same dashboards as user-facing product metrics. Many teams use PostHog for product+LLM cost visibility and pair it with a dedicated eval tool for prompt iteration.
Self-hosted PostHog is MIT-licensed and includes all product features, but you're responsible for Kubernetes, ClickHouse, Postgres, Redis, Kafka, and upgrades. Cloud handles all of that plus scaling for a per-event fee. Teams pick self-hosted for data-residency or compliance reasons; most teams save engineering time by starting on Cloud (US or EU) and only migrate off if their event bill exceeds their SRE cost.
Yes — PostHog ships an official Model Context Protocol server so assistants like Claude and Cursor can query analytics, inspect feature flags, and pull session replays as tools. Combined with Max AI (PostHog's in-app assistant), this lets AI-assisted workflows read product data and answer questions grounded in real analytics rather than guesses.
Start with the free plan — upgrade when you need more.
Get Started Free →Still not sure? Read our full verdict →
Last verified March 2026