What is the difference between PostHog and Mixpanel?

PostHog is best for Product teams that need analytics, session replay, and feature flags in one tool, while Mixpanel is best for Product teams tracking user behavior and funnels. PostHog starts at Free and Mixpanel starts at Free.

Is PostHog or Mixpanel cheaper?

PostHog starts at Free and is free. Mixpanel starts at Free with a free tier.

Is there a free alternative to Mixpanel?

Both PostHog and Mixpanel offer free tiers.

PostHog vs Mixpanel

PostHog is open-source product analytics suite with session replay, feature flags, A/B testing, and surveys, while Mixpanel is product analytics platform for tracking user interactions, funnels, retention, and A/B experiments. PostHog is open source and can be self-hosted, giving you full control over your data. PostHog is built for product teams that need analytics, session replay, and feature flags in one tool, whereas Mixpanel targets product teams tracking user behavior and funnels.

At a glance

	PostHog	Mixpanel
Best for	Product teams that need analytics, session replay, and feature flags in one tool	Product teams tracking user behavior and funnels
Starting price	Free	Free
Free tier	✓	✓
Open source	✓	—
Free tier available	✓	✓
Open source	✓	—
A/B Testing	✓	✓
Feature Flags	✓	—
Funnels	—	✓
Product Analytics	✓	—
Retention	—	✓
Session Replay	✓	—
Surveys	✓	—
User Flows	—	✓

PostHog

Strengths

All-in-one: analytics, session replay, feature flags, A/B tests
Generous free tier (1M events/mo)
Open source and self-hostable
Strong developer experience

Weaknesses

Can be overwhelming — lots of features
Self-hosting requires significant infrastructure
UI has a learning curve
Some features less mature than best-in-class alternatives

Try PostHog → Full review

Mixpanel

Strengths

Includes Funnels as a core feature, purpose-built for analytics workflows
Includes Retention as a core feature, purpose-built for analytics workflows
Free up to 20M events/mo — generous enough for most small teams to get real work done
Established product with 17+ years on the market and a mature ecosystem

Weaknesses

Free plan exists but key features are locked behind the paid upgrade
Fewer built-in features means you may need additional tools to cover gaps
Data accuracy depends on tracking setup — misconfigured events give misleading results
Mobile experience lags behind the desktop version in features and polish

Try Mixpanel → Full review

The bottom line

Pricing: Both PostHog and Mixpanel are free. You can try both without spending a dollar.

Feature gaps: PostHog offers Feature Flags, Product Analytics and Session Replay that Mixpanel lacks. Mixpanel brings Funnels, Retention and User Flows that PostHog does not have. Both share A/B Testing.

Team fit: PostHog is geared toward any size teams, while Mixpanel is aimed at mid-size teams teams. Pick the one that matches where your team is today and where it is headed — migrating tools later is always painful.

Open source: PostHog is open source, meaning you can self-host, audit the code, and avoid vendor lock-in. Mixpanel is proprietary — you are trusting the vendor with your data and uptime.

Where each tool shines: PostHog's biggest strengths are: all-in-one: analytics, session replay, feature flags, a/b tests. generous free tier (1m events/mo). Mixpanel's biggest strengths are: includes funnels as a core feature, purpose-built for analytics workflows. includes retention as a core feature, purpose-built for analytics workflows.

Watch out for: With PostHog, users commonly note that can be overwhelming — lots of features. With Mixpanel, the main complaint is that free plan exists but key features are locked behind the paid upgrade.

Choose PostHog if...

You need a tool built for product teams that need analytics, session replay, and feature flags in one tool
You need self-hosting, data sovereignty, or the ability to audit source code
You specifically need Feature Flags and Product Analytics
You care about generous free tier (1m events/mo)
Your team size fits the any size profile PostHog is designed for

Choose Mixpanel if...

You need a tool built for product teams tracking user behavior and funnels
You specifically need Funnels and Retention
You care about includes retention as a core feature, purpose-built for analytics workflows
Your team size fits the mid-size teams profile Mixpanel is designed for
The free tier works for you: free up to 20m events/mo