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llms.txt Generatorllms.txt adoption by sector
llms.txt adoption is highest in SaaS and developer-heavy environments and much lower in government, academic, and reference-heavy sectors.
Adoption skew across named industry groups in the Trakkr study.
The key numbers.
- SaaS/developer adoption
- Highest named category adoption in the study.
- 24.1%
- Government/academic adoption
- Much lower adoption outside SaaS-heavy sectors.
- 1.5%
- Adoption rate
- Domains with llms.txt in the study.
- 13.3%
The ranked view.
Source
The llms.txt Effect
- 124.1%
SaaS / Developer Tools
The highest named category adoption in the study.
- 218.2%
E-commerce
Moderate technical adoption.
- 315.7%
News / Media
Adoption near the study average.
- 41.5%
Government / Academic
Very low adoption despite strong authority.
- 50%
Reference / Wiki
No observed llms.txt adoption in the named category.
What changed
Adoption looks cultural as much as strategic
Technical sectors adopt faster even without evidence of citation lift.
Authority does not require the file
Some of the strongest authority sectors still barely use llms.txt.
| Measure | Result |
|---|---|
| SaaS/developer adoption Highest named category adoption in the study. | 24.1% |
| Government/academic adoption Much lower adoption outside SaaS-heavy sectors. | 1.5% |
| Adoption rate Domains with llms.txt in the study. | 13.3% |
Population and method
Built from HTTP scans of 37,894 AI-cited domains, linked to 337,362 citations and 882 citation snapshots in the Trakkr corpus.
Where the evidence stops
This is an observational study. It measures correlation with citation outcomes, not a controlled experiment.
Adoption is uneven by sector, so raw averages can hide category concentration in SaaS and developer tooling.
The top-5,000 test returns p=0.85. The full scanned sample returns p<0.001 with reported r=-0.065. Neither establishes a causal effect. The public aggregates do not include confidence intervals or document the cohort for citation means and medians well enough to recompute the tests.
Cite this tracker.
Source study: llms.txt Effect“llms.txt adoption is highest in SaaS and developer-heavy environments and much lower in government, academic, and reference-heavy sectors.”
Mack Grenfell · llms.txt adoption by sector
The llms.txt Effect · Trakkr Research · Updated 4 September 2026