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Ranked by how many scanned sites use each. Once we see sites drop LaunchDarkly, where they go next ranks first.
Runtime feature flag and experimentation platform, with separate SDKs for client, server and edge code.
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.
Bootstrapped A/B testing and personalisation suite whose vendor says it needs no stored personal data to run.
Open-core, warehouse-native experimentation and feature flag platform.
Discontinued A/B testing tool from Google whose snippet still turns up on sites that never removed it.
