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The best A/B testing tools to use in 2026

A/B testing tools run controlled experiments—split tests—to compare features, paywalls, emails, or UX. They use flags, analytics, and metrics to guide product and growth decisions.

StatsigGrowthBookUnrevealedLaunchDarklyCoframe
AssemblyAI
AssemblyAI — Build voice AI apps with a single API
PromotedApi•Developer Tools•Artificial Intelligence

Top reviewed a/b testing tools

Top reviewed
PostHog
suits developer-led teams needing self-hosted analytics, session replays, and feature flags to run robust A/B tests across web and backend.
Statsig
emphasizes fast, reliable experimentation with real-time analytics, targeting, and flag-driven rollouts.
GrowthBook
offers open-source flexibility and guardrails for safe releases, balancing simplicity with customizable experimentation—ideal for teams seeking control without sacrificing speed or clarity.
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