{
  "kind": "answer",
  "studySlug": "citation-sources",
  "slug": "how-big-is-the-competitive-set-for-ai-citations",
  "title": "How big is the competitive set for AI citations?",
  "description": "The current index contains 725,777 unique cited domains across 1,928 tracked brands. That is the observed citation surface, although not every cited domain is a commercial competitor.",
  "lastUpdated": "2026-10-14",
  "lastTested": "2026-10-14",
  "sourceStudyUrl": "/trakkr-research/citation-sources",
  "sourceStudyTitle": "AI Citation Index",
  "claimIds": [
    "citation-sources:unique-domains",
    "citation-sources:brands-analyzed"
  ],
  "relatedSlugs": [
    "answer:what-source-categories-show-up-most-in-ai-answers",
    "answer:do-brands-need-third-party-sources-to-win-ai-citations",
    "fact:the-current-index-tracks-millions-of-cited-urls",
    "tracker:top-cited-domain-tracker"
  ],
  "methodologySummary": "Built from 80,769,585 citation appearances across 725,777 unique domains in the latest valid snapshot for 1,928 tracked brands, observed from October 3, 2025 to October 14, 2026.",
  "limitations": [
    "The index is a changing panel of tracked brands and prompts, not a random sample of all AI responses.",
    "Domain share is observational. It does not establish causal influence or reveal the full retrieval set.",
    "The hand-maintained source taxonomy is partial: 88.40% of citation appearances remain in “other”.",
    "Model attribution, response-level citation denominators, geography, raw prompts, and raw responses are not retained in the public aggregate."
  ],
  "keywords": [
    "AI citations",
    "citation sources",
    "AI source preferences",
    "domain authority in AI",
    "AI citation competition",
    "citation landscape"
  ],
  "schemaHints": {
    "pageType": "Article",
    "includeDataset": true
  },
  "question": "How big is the competitive set for AI citations?",
  "directAnswer": "The current index contains 725,777 unique cited domains across 1,928 tracked brands. That is the observed citation surface, although not every cited domain is a commercial competitor.",
  "answerSummary": "Domain breadth shows how wide the evidence layer is. It should not be confused with a count of direct competitors.",
  "keyFacts": [
    {
      "label": "Unique domains",
      "value": "725,777",
      "detail": "Distinct normalized domains in the current brand snapshots.",
      "claimId": "citation-sources:unique-domains"
    },
    {
      "label": "Tracked brands",
      "value": "1,928",
      "detail": "Current brand-snapshot coverage.",
      "claimId": "citation-sources:brands-analyzed"
    }
  ],
  "evidenceTable": [
    {
      "label": "Unique domains",
      "value": "725,777",
      "note": "Distinct normalized domains in the current brand snapshots."
    },
    {
      "label": "Tracked brands",
      "value": "1,928",
      "note": "Current brand-snapshot coverage."
    }
  ],
  "whyItMatters": "This answer matters because it turns a study finding into an operating rule teams can use when they decide what to publish, refresh, or measure next.",
  "whatToDo": [
    "Audit the domains that already dominate your category and decide which ones are realistic citation targets.",
    "Build source-worthy pages for the query shapes where AI is already citing third parties.",
    "Treat reference, review, and social sources as part of your AI visibility surface, not as noise."
  ],
  "faqs": [
    {
      "question": "How big is the competitive set for AI citations?",
      "answer": "The current index contains 725,777 unique cited domains across 1,928 tracked brands. That is the observed citation surface, although not every cited domain is a commercial competitor."
    },
    {
      "question": "Which numbers from AI Citation Index matter most here?",
      "answer": "Unique domains: 725,777. Distinct normalized domains in the current brand snapshots. Tracked brands: 1,928. Current brand-snapshot coverage."
    },
    {
      "question": "What should a team do next?",
      "answer": "Audit the domains that already dominate your category and decide which ones are realistic citation targets. Build source-worthy pages for the query shapes where AI is already citing third parties. Treat reference, review, and social sources as part of your AI visibility surface, not as noise."
    }
  ]
}