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AI Visibility Index: 94.8% of Audited Sites Are Never Cited in AI Answers, While Only 8.9% Block AI Crawlers
The second edition of the AI Visibility Index, with data collected through August 2, 2026, covers 531 audits across 458 domains and 38 sectors, and reports that only 10 of 193 sites were named even once across 5,978 assistant answers — a 94.8% invisibility rate — while just 39 of 436 sites (8.9%) block any AI crawler in robots.txt. Gemini had the widest reach, naming audited businesses in 2.9% of answers, with ChatGPT, Claude, and Perplexity queried on identical questions over overlapping periods. The authors flag their corpus is self-selected from owners who voluntarily ran free audits, so it likely skews toward businesses already managing their web presence — which makes the invisibility number a floor, not a ceiling.
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