What is PostHog?
PostHog is an open-source product analytics platform that functions as a complete "Product OS." It bundles multiple capabilities into a single tool:
- Pageview and event analytics
- A/B testing (integrated with feature flags)
- Session replay
- Funnel and trend analysis
- Feature flags
It also supports self-hosting, giving you full control over your data — a major advantage for privacy-conscious teams or those needing custom deployment.
PostHog is an open-source project available on GitHub. Self-hosting removes event limits entirely and keeps all data on your own infrastructure.
The Free Tier is Incredible
PostHog's cloud offering is free for up to 1 million events per month.
For small to medium sites, that's more than enough. Most indie devs and early-stage startups won't ever need to pay.
Pay-as-you-go Unlocks 6 Projects
Upgrading to Pay-as-you-go pricing unlocks 6 projects under a single account.
The 1M free event pool is shared across all projects. If you run 2-3 sites and want to run A/B tests on each, this setup is incredibly cost-effective.
For multi-site operators, the Pay-as-you-go plan with 6 projects sharing 1M free events offers unbeatable value.
A/B Testing Made Simple
PostHog's A/B testing works through feature flags. Call posthog.getFeatureFlag() in your code, and the platform handles the experiment group assignment automatically. Results are visualized in real-time on the dashboard.
No need for a separate A/B testing tool like Google Optimize — analytics and experimentation live in the same place.
Experience with benri-tools
Here's what it felt like integrating PostHog into benri-tools (a collection of utility tools):
- Easy setup: Just install the npm package and add the snippet
- Quick A/B testing: Feature flag integration is intuitive
- Clean dashboard: Events and session flows are easy to read
- Generous free tier: Virtually no worry about hitting the 1M limit
Self-hosting comes with server operational costs. For small sites, the SaaS free tier is more than adequate — start there.
Related:
Summary
PostHog is a unified platform for product analytics, A/B testing, session replay, and feature flags — a true Product OS.
- Free up to 1M events/month
- 6 projects on Pay-as-you-go
- Self-hostable
- Easy A/B testing
Give it a try on the free cloud tier if you're curious.
