Side-by-Side Pricing
| Plan | PostHog | Mixpanel |
|---|---|---|
| Free | $0 — 1M analytics events, 5K session replays, 1M feature flags, unlimited users | $0 — 1M events/mo, core analytics, unlimited saved reports |
| Pay-as-you-go | $0 base + ~$0.00005/event after free tier | Growth — usage-based, ~$0.00028/event after 1M free |
| Enterprise | $2,000/mo ($24,000/yr) — SOC 2, HIPAA, 7-year retention, SSO | Enterprise — custom (starts ~$25K/yr), advanced governance |
PostHog's per-event cost (~$0.00005) is roughly 5.6x cheaper than Mixpanel's (~$0.00028) for overages. At 5M events/mo, PostHog costs ~$200/mo in overages vs Mixpanel ~$1,120/mo.
Feature Comparison
| Feature | PostHog | Mixpanel |
|---|---|---|
| Product analytics | Yes — funnels, retention, paths | Yes — best-in-class query engine |
| Session replay | Built-in (5K free/mo) | Add-on (recent addition) |
| Feature flags | Built-in (1M requests free) | No |
| A/B testing | Built-in | A/B test analysis (not execution) |
| Surveys | Built-in (1,500 free/mo) | No |
| Heatmaps | Built-in | No |
| Open source | Yes — self-hostable | No |
| Data warehouse | Built-in (query external sources) | Data pipelines (add-on) |
| Query UX | Good — improving rapidly | Excellent — best self-serve analytics UX |
| Error tracking | Built-in | No |
Decision Framework
Choose PostHog if:
- ✓You want analytics + session replay + feature flags in one tool
- ✓Transparent, usage-based pricing matters
- ✓You may want to self-host for data sovereignty
- ✓You're a developer-first team
Choose Mixpanel if:
- ✓You want the most polished product analytics UX
- ✓Non-technical PMs need to self-serve queries
- ✓Advanced funnel and retention analysis are primary needs
- ✓You already use separate tools for feature flags and replay
What PostHog Does Better
All-in-one platform. Analytics, session replay, feature flags, A/B testing, surveys, heatmaps, and error tracking in one tool. Replacing Mixpanel + LaunchDarkly + Hotjar + Statsig with PostHog saves both money and integration complexity.
Pricing transparency. PostHog's pricing is fully public with a calculator. ~$0.00005/event after the free tier. Mixpanel's Growth pricing is usage-based but less transparent at scale, and Enterprise requires sales conversations.
What Mixpanel Does Better
Query UX. Mixpanel's self-serve analytics interface is the most polished in the market. Product managers can build complex funnel analyses, cohort comparisons, and retention curves without SQL or engineering help. PostHog is improving but Mixpanel is still the UX benchmark.
Mature analytics depth. Mixpanel has been refining product analytics for over a decade. Its Flows feature, predictive analytics, and cohort comparison tools are more mature than PostHog's newer equivalents.
Monthly Cost at Three Volume Levels
| Monthly Events | PostHog | Mixpanel |
|---|---|---|
| 1M events | $0/mo (free tier) | $0/mo (free tier) |
| 5M events | ~$200/mo | ~$1,120/mo |
| 20M events | ~$950/mo | ~$5,320/mo (or negotiated Enterprise) |
PostHog is dramatically cheaper at scale. The cost advantage grows with volume. However, PostHog's pricing includes analytics events only — session replay, feature flags, and surveys have separate usage-based pricing.
Migration Between the Two
Mixpanel to PostHog
Effort: Medium. Replace Mixpanel SDK with PostHog SDK. Event tracking code needs updating. Historical data can be migrated via API but is complex. Saved reports and dashboards must be recreated.
PostHog to Mixpanel
Effort: Medium. Replace PostHog SDK. What breaks: Session replay, feature flags, and A/B testing (need separate replacements). Historical data migration via API. Dashboards and insights must be recreated.
Common Mistakes When Choosing
Choosing Mixpanel then buying LaunchDarkly and Hotjar separately
Mixpanel + LaunchDarkly + Hotjar can easily cost $500–2,000+/mo. PostHog includes equivalent functionality for analytics, feature flags, session replay, and A/B testing in one platform at a fraction of the combined cost.
Choosing PostHog expecting Mixpanel's query polish
PostHog's analytics UI is good and improving rapidly, but Mixpanel's query builder is more refined for non-technical users. If your PMs need to self-serve complex queries without engineering support, Mixpanel's UX advantage matters.
Frequently Asked Questions
Can I self-host PostHog?
Yes. PostHog is open source and can be self-hosted via Docker. This gives you full data sovereignty and eliminates per-event costs. The tradeoff is managing your own infrastructure and missing some cloud-only features.
Does Mixpanel have session replay?
Mixpanel added session replay as an add-on. PostHog includes session replay as a core feature with 5,000 free recordings per month.
What about Amplitude?
Amplitude is another strong option with analytics + experimentation + session replay. Its Starter free tier includes 10K MTUs or 10M events. It's more enterprise-focused than PostHog with less transparent pricing at scale.
Which has better data warehouse integration?
PostHog has a built-in data warehouse that can query external sources (BigQuery, Snowflake, S3). Mixpanel offers data pipelines as an add-on for warehouse sync. Both integrate with Segment for data collection.
Is the 1M free events enough?
For most startups and early-stage products, yes. 1M events/month covers a product with ~10K–50K monthly active users depending on event density. Both platforms are generous enough to use free through early product-market fit.
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