AI search statistics
Twenty-two figures on how AI answer engines cite, drawn from published studies and our own prompt tracking. Every one links to the working behind it, including the ones that contradict each other.
Most numbers quoted about AI search come without a denominator. These do. Each figure names its source and links to the piece that works through how it was measured and where it disagrees with the next study.
Free to cite, with attribution to the original source rather than to us where the two differ.
Where AI cites from
Which domains answer engines pull from, and how much of it you control.
- 84%
of links AI engines cite point at domains the brand does not own, across 25 million cited links — though the ratio flips on evaluation-stage prompts.
Analysis of 25M cited links — Where AI Citations Come From (Mostly Not Your Site)
- 61.7%
of brand appearances in AI answers were citations with no brand mention in the text.
Semrush and Kevin Indig — Ghost Citations: When AI Cites You Without Naming You
- #2
LinkedIn ranks second only to Reddit or YouTube among cited domains — and most citations point at individual profiles, not company pages.
Two 2026 studies — LinkedIn Is the #2 Most-Cited Domain in AI Search. Your Company Page Isn't Why.
- 0.99–23.3%
YouTube's share of AI citations, across six published figures that are each defensible. The spread is engines and denominators.
Six published datasets — YouTube Is the Top-Cited Domain in Google's AI Answers. In ChatGPT It's 1%.
- 0.3% vs 9–20%
Paid and advertorial content earns 0.3% of AI citations in one dataset; a wire-distributed story reaches 9–20% of related answers in another.
Two datasets — Do Press Releases Get Your Brand Into AI Answers?
- AI Citations: What They Are & How to Earn ThemAI citations are the source links AI answers attribute information to. Learn how AI engines decide what to cite, and how to earn citations.
How engines behave
How individual engines retrieve, cite and change — and how far apart they sit.
- 40%+
of US Google searches now carry an AI Overview, up from 15% a year earlier.
Similarweb — AI Overviews Now Appear in 43% of US Searches
- 48%
more ChatGPT citations per page for publishers with OpenAI licensing deals. Google's and Perplexity's licensees get no equivalent home-platform edge.
129-million-citation study — OpenAI Licensing Deals Buy a 48% ChatGPT Citation Premium. Nobody Else's Do.
- -86%
Reddit's share of ChatGPT Search citations in August 2026. It also barely registers in Google's AI Overviews.
Elmo tracking — Reddit Lost Its AI Citation Lead While Marketers Were Busy Gaming It
- -90%
Reddit's citation share in the ChatGPT UI fell by more than 90%, landing near the level API web search already returned.
Elmo tracking — ChatGPT UI now cites Reddit the same amount as the OpenAI API
- 40–50%
of exposed runs saw ten search agents endorse fabricated brands. They verified suspicious evidence in about 2% of cases.
72,000-page benchmark — Do AI Search Engines Fact-Check What They Read About Your Brand?
- weeks
Presence builds over weeks rather than days, and the content AI cites is typically months old.
Three 2026 datasets — How Long Does It Take to Get Cited by AI?
Whether tactics work
What measurably moves citation, and what has been tested and found not to.
- 8.9%
of pages AI search retrieves show signs of GEO optimization — the first published measurement of adoption.
CISPA — How Much of the Web Is GEO-Optimized? 9% Overall, 16% of Pages Touched This Year
- 0 of 10
engines where the classic GEO effect sizes moved citation, when re-measured on modern engines.
Validation study — Can a Content Score Predict Whether AI Will Cite You?
- quality falls
Simulations of a market where everyone optimizes for citation: fixed tactics lose their edge as adoption rises, and the ranking signal drifts away from quality.
CMU and others — Citation Wars: The GEO Playbook Is Now the Attack Model
- edge decays
Two simulations of GEO under competition find fixed tactics stop paying as adoption rises.
Two simulations — Do GEO Tactics Stop Working When Everyone Uses Them?
- 54% / 0.2%
AI-referred retail visitors convert 54% better than everyone else, and AI accounts for 0.2% of all sessions. Both are true.
Adobe and Contentsquare — AI Traffic Converts Better Than Search. It's Also 0.2% of Your Visits.
What the numbers mean
Why published figures disagree, and which measurement choices drive the spread.
- 12–93%
Published estimates of the overlap between top-10 rankings and AI citations. The spread is the finding: rank is neither necessary nor sufficient.
Published estimates — Does Ranking in Google's Top 10 Get You Cited by AI?
- 34.7%
of Perplexity citations did not support the sentence they were attached to, in one of two audits published the same day.
Two independent audits — Can You Trust AI Citations? A Third Don't Support the Claim
- 9–54%
Published rates for how many sites block AI crawlers. The spread is which slice of the web was sampled and whether the bot does search or training.
Published blocking rates — How Many Websites Block AI Crawlers? Depends Which Web You Mean
- ~1/3
The last prompt in an AI conversation carries about a third of what the user actually said.
Multi-turn research — Multi-Turn AI Search: What Prompt Tracking Misses
- same brand, two scores
Two tools can report very different AI visibility for the same brand in the same week without either being broken — the prompt set and its weights define what the score measures.
Preprint — Why Do Two AI Visibility Tools Give Your Brand Different Scores?
- churn
The domains AI cites change more between runs than most measurement assumes, and how much depends on what you ask.
Elmo tracking — Citation Volatility: How Much Do the Sources AI Cites Change Over Time?
- Microsoft Clarity AI Citations: What It Tracks (and What It Misses)Clarity's Citation dashboard is free, first-party data on which of your pages AI answers cite. Here's what its metrics mean, what the new scrape-to-referral ratio tells you, and the one ecosystem it can see.
- What Metrics Matter for AI Search Visibility?Which AI search visibility metrics actually matter, and when a number is solid enough to spend budget against — built on the IAB's 4 P's and its decision-grade criteria.
Ready to track your AI visibility?
Deploy Elmo in minutes and start monitoring how ChatGPT, Claude, and Google AI Overviews talk about your brand. Open source, self-hosted, free.