B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
56%
56% -- invalid ai discovery file rate for AI Discovery Files found in crawl (Q1 2026)
56% of the AI Discovery Files found across crawled domains failed validation and were invalid.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
56%
Unit
Percentage
Data Vintage
Q1 2026
Entity
Sample Size
100
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
95
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
AI Visibility
Primary
Tier A
https://www.ai-visibility.org.uk/blog/how-ai-ready-is-the-web/ ↗
Source Article
How AI-Ready Is the Web? What Our Research Data Reveals | AI Visibility
The headline finding
We crawled nearly 2,000 of the web's most prominent domains to answer a simple question: how prepared is the internet for AI?
The answer is worse than we expected. Not because websites aren't trying, but because most of the ones that are trying are getting it wrong.
6.5% of the …
Original Research
AI Visibility
· Original study ↗
Methodology
100 ADF files found across 1,460 domains; validated against specification
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
AI Discovery Files found in crawl: 56% invalid ai discovery file rate. Source: AI Visibility (Q1 2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/invalid-adf-rate-q1-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/invalid-adf-rate-q1-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>56%</strong> -- invalid ai discovery file rate for AI Discovery Files found in crawl<br><small>Source: AI Visibility (Q1 2026) · <a href="https://lighthousedata.io/data/invalid-adf-rate-q1-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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