B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
5x
5x -- crawl to referral ratio for Googlebot (2026)
Google operates at an equivalent crawl-to-referral ratio of 5:1 (5 pages crawled for every referral generated).
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
5x
Unit
Ratio
Data Vintage
2026
Entity
Sample Size
4,047
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
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
TechnologyChecker
Primary
Tier B
https://betteraisearch.com/tactics/crawlability-ai-search ↗
Source Article
Technical SEO for AI Crawlability
Original Research
TechnologyChecker
· Original study ↗
Methodology
TechnologyChecker analysis of 4,047 robots.txt files
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Googlebot: 5x crawl to referral ratio. Source: TechnologyChecker (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/googlebot-crawl-to-referral-ratio
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<blockquote cite="https://lighthousedata.io/data/googlebot-crawl-to-referral-ratio" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>5x</strong> -- crawl to referral ratio for Googlebot<br><small>Source: TechnologyChecker (2026) · <a href="https://lighthousedata.io/data/googlebot-crawl-to-referral-ratio" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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