Source Domains
Also known as: AI-Cited Domains · Publisher Source Index
Source Domains are the publications and websites AI engines link to as evidence when answering buyer questions in your category. The most-cited Source Domains in any category are typically a small set — 10 to 50 publishers covering 80% of citations. Source Domains rank weekly by Leverage Score: cite count × engine reach × topical relevance. They are not competitors; they are the trusted third parties AI engines treat as ground truth. The Source Domains tab in Bullzeye Global Growth Partners is the highest-priority target list for digital PR and earned media in the GEO era. Most teams call them Publisher Citations once they understand the outreach mechanic.
Earning citations from publishers AI engines trust
Why earned media on the right publishers moves the AI citation needle faster than any amount of on-page optimization, and how to find the publishers that matter.
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See your own GEO Score
Run a free citation scan across ChatGPT, Perplexity, Claude, and Gemini and see what AI engines say about your brand.
Run Free AnalysisLast updated 2026-05-27 · Part of the