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llms.txt GeneratorThe citation graph spans more than 700,000 domains
The current Trakkr citation index spans 725,777 unique domains.
The long tail is enormous even when the head is concentrated.
The numbers behind it.
- Unique domains
- Distinct normalized domains in the current brand snapshots.
- 725,777
- Tracked brands
- Current brand-snapshot coverage.
- 1,928
The evidence.
Source
AI Citation Index
| Measure | Result |
|---|---|
| Unique domains Distinct normalized domains in the current brand snapshots. | 725,777 |
| Tracked brands Current brand-snapshot coverage. | 1,928 |
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.
What to do with this
Brands do not only compete with category leaders. They compete with an extremely fragmented evidence layer.
Cite this fact.
Source study: Citation Sources“The current Trakkr citation index spans 725,777 unique domains.”
AI Citation Index - Trakkr Research · The citation graph spans more than 700,000 domains
AI Citation Index · Trakkr Research · Updated 14 October 2026