Not sure where to start? Take a guided tour.
AI Site Grader
AI Query Scanner
llms.txt GeneratorTop cited domains in the live index
YouTube, google.com, and Reddit form the current head, but together account for only 5.82% of citation appearances.
Current head domains in Trakkr’s live public citation graph.
The key numbers.
- YouTube share
- youtube.com ranks first with 2,222,347 citation appearances.
- 2.75%
- google.com share
- google.com ranks second with 1,261,575 citation appearances.
- 1.56%
- Top three domain share
- YouTube, google.com, and Reddit together account for 5.82%.
- 5.82%
The ranked view.
Source
AI Citation Index
- 12.75%
youtube.com
The current top cited domain in the public citation index.
- 21.56%
google.com
The second-ranked domain in the current snapshot.
- 31.50%
reddit.com
The third-ranked domain in the current snapshot.
- 41.35%
en.wikipedia.org
The fourth-ranked domain in the current snapshot.
- 50.68%
linkedin.com
The fifth-ranked domain in the current snapshot.
What changed
YouTube still ranks first
youtube.com holds 2.75% in the verified October 14, 2026 snapshot.
google.com moves up to second
google.com holds 1.56%, up from fifth place in the August snapshot. English Wikipedia is now fourth, down from second.
The top three hold 5.82%
The observed head is measurable, but the index does not assign a causal reason for those rankings.
| Measure | Result |
|---|---|
| Top three domain share YouTube, google.com, and Reddit together account for 5.82%. | 5.82% |
| Citation appearances 80,769,585 appearances in the verified October 14, 2026 snapshot. | 80.8M |
| Unique domains Distinct normalized domains in the current brand snapshots. | 725,777 |
Population and method
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.
Where the evidence stops
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.
Cite this tracker.
Source study: Citation Sources“YouTube, google.com, and Reddit form the current head, but together account for only 5.82% of citation appearances.”
Mack Grenfell · Top cited domains in the live index
AI Citation Index · Trakkr Research · Updated 14 October 2026