PostHog

Freemium

Open source product analytics with session recordings, feature flags, and A/B testing.

Generous Free TierOpen Source

Free plan checked against PostHog's pricing page on 2 September 2026. Re-checked monthly.

Visit Website View Pricing

About PostHog

PostHog is an open source product analytics platform that combines event tracking, session recordings, feature flags, A/B testing, and surveys in a single tool. It was built for engineering teams who want to understand user behavior without sending data to third parties.

An All-in-One Product Stack

Most teams cobble together 5-6 different tools for analytics, session replay, experimentation, and feature management. PostHog replaces all of them with a single platform that shares the same data layer.

What You Get

Product analytics - Funnels, trends, retention analysis, and user paths
Session recordings - Watch exactly how users interact with your product
Feature flags - Roll out features gradually with targeting rules
A/B testing - Run experiments and measure impact on your metrics
Surveys - Collect qualitative feedback directly in your product
Data warehouse - Query your raw data with SQL
Heatmaps - Visualize where users click, scroll, and engage

Generous Free Tier

The free plan includes 1 million events, 5,000 session recordings, and 1 million feature flag requests per month. For most early-stage startups, this is more than enough to run for months without paying.

Key Features

Product analytics

Session recordings

Feature flags

A/B testing

Surveys

Data warehouse

Heatmaps

Correlation analysis

Pros & Cons

All-in-one product analytics

Extremely generous free tier

Open source

Self-hostable

Can be complex for simple use cases

Learning curve for advanced features

The free plan in practice

What you can actually do on PostHog's free plan (1M events/mo free), where it stops, and when it's worth paying.

What you can do free

1M events/month
5K session recordings/month
1M feature flag requests/month
Unlimited team members

Where it stops

Usage-based pricing above free limits
Some enterprise features locked

When to upgrade to a paid plan

The free tier is huge: 1M events a month plus session replay and feature flags. You won't pay until you genuinely outgrow 1M events, and even then it's usage-based, you only pay for what you go over. Upgrade when your product traffic consistently exceeds the free allowance.