B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
92.8%
92.8% -- robots txt adoption rate for Fortune 500 companies (Q1 2026)
92.8% of Fortune 500 companies have implemented robots.txt.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
92.8%
Unit
Percentage
Data Vintage
Q1 2026
Entity
Sample Size
500
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
Sources (2)
ProGEO.ai
Primary
Tier A
https://www.progeo.ai/news/fortune500-geo-research-q1-2026 ↗
Source Article
ProGEO.ai research finds 7.4% of the Fortune 500 have implemented llms.txt — ProGEO.ai - Generative Engine Optimization (GEO)
ProGEO.ai research finds 7.4% of the Fortune 500 have implemented llms.txt
“Signaling the Shift to Generative Engine Optimization (GEO)” measures Fortune 500 adoption rates of technical protocols associated with GEO maturity
(SAN FRANCISCO, March 31,2026) – ProGEO.ai, a data-driven generative engine…
Also cited by
2026-09-14
Original Research
ProGEO.ai
· Original study ↗
Methodology
Original ProGEO.ai audit of Fortune 500 websites; robots.txt described as a 30-year-old standard for managing web crawler permissions. Sample size of 500 implied by Fortune 500 population.
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Fortune 500 companies: 92.8% robots txt adoption rate. Source: ProGEO.ai (Q1 2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/fortune500-robots-txt-adoption
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<blockquote cite="https://lighthousedata.io/data/fortune500-robots-txt-adoption" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>92.8%</strong> -- robots txt adoption rate for Fortune 500 companies<br><small>Source: ProGEO.ai (Q1 2026) · <a href="https://lighthousedata.io/data/fortune500-robots-txt-adoption" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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