Is llms.txt more common on top domains than the long tail? | Trakkr Research
Somewhat, but not dramatically. Adoption reaches 16.1% in the top 5,000 cited domains, yet the top 50 sit at only 6.0%, which undercuts the idea that the strongest citation winners are relying on llms.txt.
Methodology: Built from HTTP scans of 37,894 AI-cited domains, linked to 337,362 citations and 882 citation snapshots in the Trakkr corpus.
Direct Answer
Mostly. Adoption reaches 16.1% in the top 5,000 cited domains compared to an overall adoption rate of 13.3%, yet the top 50 sit at only 6.0%, which undercuts the idea that the strongest citation winners are relying on llms.txt.
What this means
Operators should allocate resources toward core content quality rather than assuming technical files like llms.txt drive citation performance, as the highest performing domains show minimal adoption.
Evidence table
| Metric | Value | Why it matters |
|---|---|---|
| Top 5k adoption | 16.1% | Adoption among the top 5,000 cited domains. |
| Top 50 adoption | 6.0% | Adoption among the top 50 cited domains. |
| Adoption rate | 13.3% | Domains with llms.txt in the study. |
Frequently Asked Questions
What is the adoption rate of llms.txt among the top 50 cited domains?
The adoption rate among the top 50 cited domains is 6.0%.
How does the top 5,000 adoption compare to the overall average?
Adoption reaches 16.1% in the top 5,000 cited domains, compared to the overall study adoption rate of 13.3%.
What to do next
- Treat llms.txt as an optional housekeeping file rather than a primary citation growth lever.
- Prioritize answer quality, source coverage, and page structure before spending disproportionate effort on llms.txt.
- Measure discovery and crawl behavior directly if you publish llms.txt instead of assuming it improves citation performance.
Related pages
Continue through the same study cluster.
- which industries adopt llms txt most - Related answer page
- does llms txt help you even if it does not raise citations - Related answer page
- average citations are functionally flat with and without the file - Related fact page
- llmstxt adoption by tier tracker - Related tracker page
Data & Sources
- The llms.txt Effect - Flagship study behind this page
- Page JSON - Machine-readable companion file