Google Analytics 4 vs PostHog
Google Analytics 4 (GA4) and PostHog are both analytics platforms, but they serve different analytical philosophies. GA4 is designed for marketing analytics, tracking acquisition channels, conversions, and user journeys across websites and apps. PostHog is a product analytics platform that combines event tracking, session recordings, feature flags, and experimentation in an open-source package. This comparison helps teams decide which platform fits their analytics and automation needs.
Feature Comparison
| Feature | Google Analytics 4 | PostHog |
|---|---|---|
| Core focus | Marketing and acquisition analytics. Channel attribution and conversion tracking | Product analytics. User behavior, retention, feature usage, and experimentation |
| Pricing | Free for up to 10 million events/mo. GA360 for enterprise needs | Free tier with 1 million events/mo. Usage-based pricing above that |
| Self-hosting | Cloud-only, managed by Google | Open-source, self-hostable on your own infrastructure |
| Session recordings | Not available | Built-in session recordings with event timeline overlay |
| Feature flags | Not available (requires separate tool like Firebase Remote Config) | Built-in feature flags with percentage rollouts and user targeting |
| Data export | BigQuery export (free linking). Limited raw data access otherwise | Direct SQL access to raw event data. API export. Warehouse sync to BigQuery, Snowflake, or Redshift |
| Webhook and automation support | No native webhooks. Requires BigQuery export plus custom automation | Webhook destinations for real-time event forwarding. API for data retrieval |
| Privacy | Data processed by Google. Subject to Google's data policies. Cookie consent required in EU | Self-hosted option keeps data on your servers. Cookie-less tracking mode available |
When to choose Google Analytics 4
GA4 is the right choice for marketing teams focused on acquisition, channel performance, and conversion optimization. Its attribution models, audience building for Google Ads, and cross-platform tracking (web and app) are purpose-built for understanding how users find and convert on your product. The free tier supporting up to 10 million events per month is generous for most businesses. For teams already in the Google ecosystem using Ads, Search Console, and BigQuery, GA4 integrates natively and provides a unified view of marketing performance.
When to choose PostHog
PostHog is the better platform for product teams that need to understand user behavior in detail. Session recordings let you watch exactly how users interact with your product. Feature flags enable controlled rollouts with built-in analytics on feature impact. The direct SQL access to raw event data makes PostHog far more flexible for custom analysis and automated reporting. For teams with data privacy requirements, the self-hosted option keeps all analytics data on your own infrastructure. PostHog's webhook support also makes it the easier platform to integrate into automated workflows.
Verdict
GA4 is the better marketing analytics tool. PostHog is the better product analytics tool. Most growing products benefit from both: GA4 for understanding acquisition channels and marketing ROI, PostHog for understanding in-product behavior and running experiments. For automation use cases, PostHog's webhooks and direct data access make it significantly easier to build automated workflows triggered by analytics events.
Frequently Asked Questions
Can PostHog replace Google Analytics?
What are the benefits of self-hosting PostHog?
Which is better for automated reporting?
Need help choosing?
Browse automation solutions that work with Google Analytics 4 or PostHog, built by verified experts.
Related comparisons
Last updated: March 2026