B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
11%
11% -- cited domain overlap rate for ChatGPT and Perplexity (2026)
Approximately 11% of cited domains overlap between ChatGPT and Perplexity across roughly 680 million analyzed citations.
- Represents domain overlap between only ChatGPT and Perplexity, not across all answer engines combined
Attribution:
View source
Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
11%
Unit
Percentage
Data Vintage
2026
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
35
Freshness
95
Source
Profound
Primary
Tier B
https://aiboost.co.uk/cross-engine-consistency-audit-uk/ ↗
Source Article
The Cross
Original Research
Profound
· Original study ↗
Methodology
Profound analysis of approximately 680 million citations across AI answer engines
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
ChatGPT and Perplexity: 11% cited domain overlap rate. Source: Profound (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/chatgpt-perplexity-citation-overlap-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/chatgpt-perplexity-citation-overlap-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>11%</strong> -- cited domain overlap rate for ChatGPT and Perplexity<br><small>Source: Profound (2026) · <a href="https://lighthousedata.io/data/chatgpt-perplexity-citation-overlap-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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