Top 11AI made for AI

Free growth · experimentation in the Top 11

4 providers in the Top 11 The 11 Best A/B Testing Tools offer a free tier; the most credible is VWO (Visual Website Optimizer).

Why this answer

Filtered to entries with a published free tier (not just a free trial). When the pricing page is ambiguous we err conservative — paid-only by default.

Showing all 4 matches. Top 11 publishes whatever the data supports — we don’t pad lists. See the full ranked The 11 Best A/B Testing Tools.

  1. #1VWO (Visual Website Optimizer)(rank #2 in The 11 Best A/B Testing Tools)

    Free tier

    A powerful, accessible all-in-one platform with a superb visual editor for mid-market teams.

    Full VWO (Visual Website Optimizer) review · Compare: VWO (Visual Website Optimizer) vs Statsig · Alternatives

  2. #2Statsig(rank #8 in The 11 Best A/B Testing Tools)

    Free tier

    A developer-first platform with a sophisticated stats engine for running experiments from code.

    Full Statsig review · Alternatives

  3. #3PostHog(rank #10 in The 11 Best A/B Testing Tools)

    Free tier

    An open-source platform that tightly integrates A/B testing with product analytics.

    Full PostHog review · Alternatives

  4. #4GrowthBook(rank #11 in The 11 Best A/B Testing Tools)

    Free tier

    An open-source tool that runs on your data warehouse, giving you full data ownership.

    Full GrowthBook review · Alternatives

Methodology: /methodology · No paid placement ever · Verified .