PostHog vs GrowthBook

Free tier available

From $20 per user/month (indicative, cloud Pro)

Usage-based pricing per product with a substantial free tier; most small teams stay free indefinitely.

Dramatically cheaper than the commercial platforms, especially self-hosted at high traffic.

Large monthly free allowance across every product, plus free self-hosting.

Self-hosted open-source edition is free and unlimited; cloud free tier for up to a few users.

Widely used

PostHog · since 2020

Widely used

GrowthBook · since 2021

• Replaces four or five separate subscriptions with one bill and one SDK.
• Free tier is large enough for real production use at startup scale.
• Open source with a credible self-hosting path.

• Warehouse-native by design — no duplicate event pipeline and no data leaving your control.
• Self-hosting removes per-user-volume pricing entirely.
• Both Bayesian and frequentist engines with sequential testing support.

• Individual modules are less deep than category specialists.
• Self-hosting at scale is a serious infrastructure undertaking.
• The product surface changes fast, which means occasional churn.

• Requires a working data warehouse and someone who can define metrics in SQL.
• Self-hosting is operational work you own.
• Less polished governance and approval tooling than LaunchDarkly.

Startups and scale-ups consolidating analytics, replay and flags into one platform.

Data-mature teams that already have a warehouse and want to avoid volume-based pricing.