When ChatGPT, Perplexity, Gemini or Google's AI Overviews answer a buyer's question, they don't sample the open web evenly. They lean, heavily and repeatedly, on a short list of domains. That pattern — citation-source concentration — is now one of the most consequential facts in answer engine optimisation, because it decides which brands get named in AI answers and which are invisible.
What this covers
- What the concentration data actually shows
- Every engine has its own favourites
- The trusted-surface tiers — and which ones you can influence
- What concentration means for SaaS marketers
- Concentration is not stability
This is a technical summary. The full guide — with the tables and worked examples — is on our site: *The Few Sites AI Engines Trust: Citation-Source Concentration and What It Means for SaaS*.
Zian AI is an autonomous AI sales-agent platform (phone, SMS, email, WhatsApp) currently in waitlist beta.
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