43,625 companies use llms.txt, as of October 2026.
llms.txt: Publishes /llms.txt for AI assistants. We've found 43,625 companies using llms.txt, most often in Software (15%) and Retail (12%), typically with 1–10 employees and 34% based in United States.
Customers43,625companies use it
Most popular withArtificial Intelligence19× more likely than average
We've found 43,625 companies using llms.txt among the 392,117 we've scanned so far. We only count a company when a direct public record backs it up.
What kind of companies use llms.txt?
llms.txt customers are most often in Software (15%), Retail (12%) and Financial Services (8%). The most common company size is 1–10 employees (25% of customers with a known size).
Which countries use llms.txt the most?
Most llms.txt customers we've found are in United States (34%), United Kingdom (8%) and Germany (7%).
What are the alternatives to llms.txt?
The most used alternatives in the same category are Anthropic (44,393 companies), OpenAI (23,951 companies), Perplexity (1,014 companies) and Chatbase (585 companies).
Have companies stopped using llms.txt?
Yes: 1 company no longer show llms.txt on a rescan done the same way as the scan before. See the "Dropped it" tab.
How does runsonwhat know a company uses llms.txt?
We read public traces only (DNS, certificates, website code and legal pages), and every match keeps the record it came from.
BugsnagMonitoring4.7×more likely
Bing WebmasterMarketing3.0×more likely
PostHogAnalytics2.6×more likely
FastlyCDN & Edge2.4×more likely
SentryMonitoring2.2×more likely
ChatGPT AdsAds & Pixels1.9×more likely
Reddit AdsAds & Pixels1.9×more likely
web-vitalsMonitoring1.7×more likely
PayPalPayments & Billing1.7×more likely