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Ranked by how many scanned sites use each. Once we see sites drop GrowthBook, where they go next ranks first.
Open-core, warehouse-native experimentation and feature flag platform.
Growth is sites that added it minus confirmed removals in the last 90 days.
Feature flag and experimentation tool built into PostHog, where A/B tests run on the same flags that gate releases.
A/B testing platform, merged with AB Tasty as Wingify in 2026.
Experimentation platform split into a visual web-testing product and a server-side feature-flag product.
Website personalization and A/B testing platform that Webflow acquired, usable on Webflow and non-Webflow sites.
Product experimentation and feature flag platform that shares its data with Amplitude Analytics.
Adobe's A/B testing and personalisation platform, licensed as Target Standard or with a Premium tier on top.
Runtime feature flag and experimentation platform, with separate SDKs for client, server and edge code.
Bootstrapped A/B testing and personalisation suite whose vendor says it needs no stored personal data to run.
Discontinued A/B testing tool from Google whose snippet still turns up on sites that never removed it.
