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 through August 2, covers 531 audits across 458 domains and 38 sectors: only 10 of 193 sites were named even once across 5,978 assistant answers, while just 39 of 436 block any AI crawler in robots.txt. Gemini had the widest reach at 2.9%. The authors flag their corpus is self-selected from owners who voluntarily ran free audits, so it skews toward businesses already managing their web presence: which makes the invisibility number a floor, not a ceiling.