Top 20 a/b testing tools by AI search visibility (2026)

What we observed in this categoryauto-generated

Statsig and VWO share the highest visibility score in the category at 62.5%, well above the 21.9% category average, yet their composite scores diverge sharply — 51.2 vs 47.5 — because VWO's citation rate sits at just 12.5% compared to Statsig's 25.0%. Convert, despite lower visibility at 50.0%, achieves the highest citation rate of any brand at 50.0%, producing a composite score of 50.0 that nearly matches Statsig's lead. This gap between the top three and the rest is steep: rank 5 onwards falls below 37.5% visibility and holds 0.0% citation rates across the board.

A clear divergence exists between brands that are named in AI Overviews and those that are actually cited as sources. Optimizely appears in 50.0% of responses but carries a 0.0% citation rate, meaning AI surfaces it as a named option without linking to it as a trusted reference. The same pattern applies to LaunchDarkly, Split, GrowthBook, and Unbounce, all at 37.5% visibility with zero citations. Convert is the only brand where visibility and citation are in balance, suggesting its content is being treated as a reference source rather than just a mentioned product.

Google AI Overviews is the top engine for every brand in this dataset without exception, indicating the category's AI visibility is almost entirely a Google phenomenon. The top cited sources list reveals that non-brand domains — coursera.org, reddit.com, youtube.com, and qualaroo.com — are anchoring AI responses alongside convert.com and statsig.com. The presence of amplitude.com and geteppo.com in citations, neither of which rank in the top 10 brands, suggests AI is drawing on adjacent analytics and experimentation content to construct its answers in this category.