The citation graph spans more than 500,000 domains | Trakkr Research
The long tail is enormous even when the head is concentrated.
Methodology: Built from 48,422,016 citation appearances across 529,165 unique domains in the latest valid snapshot for 1,643 tracked brands, observed from October 3, 2025 to August 18, 2026.
Claim
The current Trakkr citation index spans 529,165 unique domains.
Why it matters
Brands do not only compete with category leaders. They compete with an extremely fragmented evidence layer.
Supporting metrics
| Metric | Value | Context |
|---|---|---|
| Unique domains | 529,165 | Distinct normalized domains in the current brand snapshots. |
| Tracked brands | 1,643 | Current brand-snapshot coverage. |
Related pages
Continue through the same study cluster.
- how concentrated is the ai citation landscape - Related answer page
- does ai rely more on reference sites than the open web - Related answer page
- top cited domain tracker - Related tracker page
Data & Sources
- AI Citation Index - Flagship study behind this page
- Page JSON - Machine-readable companion file