GrowthBook vs PostHog

From $40 per seat/month (cloud Pro, up to 30 users and 3 projects)

Free tier available

Seat-based rather than usage-based, so cost tracks the number of people using the platform rather than your traffic — which is why it stays dramatically cheaper than the commercial platforms at scale, especially self-hosted.

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

Self-hosted open source is free with unlimited users on 1 project; the cloud Starter tier is free for up to 3 users.

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

Widely used

GrowthBook · since 2021

Widely used

PostHog · since 2020

• 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.

• 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.

• 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.

• 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.

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

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