Mixpanel vs PostHog

Verdict

Mixpanel and PostHog both do the core job of event-based product analytics — funnels, retention, cohorts — well enough that a team fluent in one will be productive in the other quickly. The real differences are architectural, not analytical. Mixpanel is cloud-only, vendor-hosted SaaS with a clean, focused product built around analytics, session replay and experimentation. PostHog is open source (MIT-licensed core) and bundles far more into one suite by default: analytics, session replay, feature flags, A/B experiments, error tracking, surveys and even a built-in data warehouse, and it can be run fully self-hosted via Docker Compose instead of PostHog Cloud.

That self-hosting option is the decisive factor for some teams and irrelevant to others. If data residency, compliance, or simply wanting full control over infrastructure matters, PostHog is the only one of the two that offers it. If you just want the best hosted analytics experience and don't need the extra bundled products, Mixpanel's more focused interface is often faster to get a team fully onboarded on.

Choose Mixpanel if

• You want a hosted-only product built specifically around analytics, without managing infrastructure or picking through a broader suite.
• Your team wants A/B testing and feature flags but doesn't need error tracking or a built-in data warehouse from the same vendor.
• Unlimited seats on the free plan (up to 1M events/month) matters for getting the whole company looking at the same data.

Choose PostHog if

• Self-hosting is a real requirement, not a nice-to-have, for compliance or cost-control reasons.
• You want analytics, replay, flags, experiments and error tracking from one vendor instead of stitching several tools together.
• You're comfortable with SQL-based querying and want direct access to a built-in data warehouse alongside the product analytics.

The honest caveat

PostHog's breadth is also a reason evaluations run longer — with more products bundled in, more of the pricing page has to be modeled against your actual usage across analytics, replay, flags and error tracking rather than one clean number. Mixpanel's simplicity is real, but it means you'll pay for a separate tool the moment you need feature flags plus error tracking plus a data warehouse in one place. Instrument the same handful of events in both free tiers and compare directly rather than deciding from a features table — see Amplitude vs Mixpanel for how a third close peer fits into the comparison.