B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
12.7%
12.7% -- security txt adoption rate for top websites (Tranco sample) (Q1 2026)
12.7% of crawled top websites had a security.txt file present.
- Refers to security.txt files found regardless of validity (12.4% were valid)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
12.7%
Unit
Percentage
Data Vintage
Q1 2026
Entity
Sample Size
1,460
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
Comparison crawl of web standards adoption
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
top websites (Tranco sample): 12.7% security txt adoption rate. Source: AI Visibility (Q1 2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/security-txt-adoption-comparison
HTML Embed
<blockquote cite="https://lighthousedata.io/data/security-txt-adoption-comparison" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>12.7%</strong> -- security txt adoption rate for top websites (Tranco sample)<br><small>Source: AI Visibility (Q1 2026) · <a href="https://lighthousedata.io/data/security-txt-adoption-comparison" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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