KinetixSEO crawl study
llms.txt adoption among public SEO and content-marketing tool vendor sites
Only 38% of the 42 public SEO and content-marketing tool vendor sites publish an llms.txt file at all.
Measured · n = 42 · cohort: public SEO and content-marketing tool vendor sites
The numbers
16 of 42 (38.1%)
- Publish a non-empty llms.txt
- 16
- No llms.txt (404 or empty file)
- 26
- Sites observed (sample size)
- 42
- Listed but unreachable on the day (excluded)
- 0 of 42
The headline rounds to a whole percent (38%); the exact share is 38.1% of the observed sample.
Methodology
How this was measured
Requested /llms.txt on each of the 42 public SEO and content-marketing tool vendor sites and counted the sites returning a non-empty file rather than a 404.
One observation: Whether the site serves a non-empty file at /llms.txt.
How the cohort was chosen: Hand-curated 2026-09-04 from the vendors that recur across public "best SEO tools" listicles. Every URL is the vendor's own public homepage.
Every request was a single polite fetch per site with a short timeout and no retries. Only aggregate counts are published — no per-site result.
Limitations
What this figure does not tell you
- The cohort is a named, hand-curated list, not a random sample of the web. The share describes these sites, not every site.
- It is one measurement on the date shown. Any site can change its setup the next day.
- Only the presence of a non-empty file at /llms.txt was checked, not its content or quality.
How to cite
Use this data
KinetixSEO (2026). llms.txt adoption among public SEO and content-marketing tool vendor sites [Data set]. KinetixSEO crawl study, measured 25 September 2026, n = 42. https://kinetixseo.com/learn/studies/seo-tool-vendors-llms-txt
Published under a CC BY 4.0 license: free to reuse with attribution. Download the aggregate results as CSV (every published run of this study).
Every published run
Run history
| Measured | Publish a non-empty llms.txt | Share | Sample size | Unreachable |
|---|---|---|---|---|
| 16 | 38.1% | n = 42 | 0 of 42 |
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