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ResearchMarch 2026 · 28 pages

The AI Citation Report: Analysis of 30 Million Sources

Which domains, content types, and signals drive AI citations across ChatGPT, Perplexity, and Gemini

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About this report

amplerank analyzed 30 million citations extracted from ChatGPT, Perplexity, and Gemini responses across 500,000 prompts in 50 industry categories. This report identifies the domains, content types, and structural signals that consistently drive AI citations — and quantifies their relative impact.

Key findings

  • Reddit accounts for 11.2% of all AI citations — more than any other single domain
  • Brands with Wikipedia pages are cited 4.7x more frequently than brands without
  • G2 review count correlates more strongly with ChatGPT citation rate than domain authority
  • Freshness premium: pages updated in the past 30 days are 3.2x more likely to be cited by Perplexity
  • YouTube is the fastest-growing citation source, up 89% year-over-year

Table of Contents

01

Methodology

Data collection, prompt design, and analysis approach for the 30M citation study.

02

Top Domains by Platform

The most cited domains for each AI platform with platform-specific patterns.

03

Content Type Analysis

Which content formats (listicles, reviews, how-tos, news) generate the most citations per platform.

04

Citation Signal Correlation

Statistical analysis of which brand signals most strongly correlate with citation frequency.

05

Industry Breakdowns

Citation patterns by industry: SaaS, e-commerce, financial services, healthcare, and more.

06

Implications and Recommendations

What the data means for brand citation strategy, with specific investment priorities.

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