GrowthBook vs AB Tasty

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

Quote on request

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

Quote-based annual contracts priced by traffic volume.

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

No free tier; demo on request.

Widely used

GrowthBook · since 2021

Established

AB Tasty · since 2009

• 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.

• EU hosting and GDPR posture simplify European procurement.
• Good balance between marketer-friendly editing and server-side flags.
• Strong support reputation in European markets.

• 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.

• Less well known outside Europe, with a smaller partner ecosystem.
• Quote-based pricing with no self-serve entry.
• Statistics engine is less differentiated than the warehouse-native platforms.

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

European e-commerce and media companies with GDPR-driven vendor requirements.