B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Recent
80%
80% -- publishers blocking ai crawlers for top news publishers (2025)
Nearly 80% of top news publishers block at least one major AI training crawler.
- Source states 'nearly 80%'
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
80%
Unit
Percentage
Data Vintage
2025
Entity
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
Press Gazette
Primary
Tier B
https://indexcraft.in/ai-search/optimize-perplexity-chatgpt-gemini-search ↗
Source Article
Optimise for Perplexity, ChatGPT & Gemini (2026)
⚡ Direct Answer
To get cited across Perplexity AI, ChatGPT Search, and Google Gemini, you need three separate technical setups — one per platform — plus a shared content foundation. Allow PerplexityBot, OAI-SearchBot, and Google-Extended in robots.txt so each AI crawler can reach your pages. Verify …
Original Research
Press Gazette
· Original study ↗
Methodology
Press Gazette research
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
top news publishers: 80% publishers blocking ai crawlers. Source: Press Gazette (2025). Via Lighthouse Intelligence -- https://lighthousedata.io/data/publishers-blocking-ai-crawlers-80
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<blockquote cite="https://lighthousedata.io/data/publishers-blocking-ai-crawlers-80" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>80%</strong> -- publishers blocking ai crawlers for top news publishers<br><small>Source: Press Gazette (2025) · <a href="https://lighthousedata.io/data/publishers-blocking-ai-crawlers-80" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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