robots.txt is HTML, not text
robots.txt must be plain text. Served as HTML it cannot be parsed, so no crawl directives and no sitemap reference are read. 517 sites had this problem when we measured them in the last 7 days. The list gives each one with its domain, name where known, platform, every technology we detected, its A–F grade with all its findings, location where known, and what it serves AI crawlers.
- 517 sites, last 7 days
- 98 US local businesses
- 3% also block an AI crawler
- $99 once, 30 days of downloads
Who has it
Platform
No CMS detected 81%WordPress 8%Next.js 7%Drupal 1%Webflow 1%Shopify 0%
Grade
F 100%
Where
Wider corpus 55%US local businesses 19%Government and education 15%SaaS and software 11%
| Where | Category | Grade | Platform | AI crawlers |
|---|---|---|---|---|
| SaaS and software | Other | F | No CMS detected | allowed |
| Government and education | Gov Edu | F | No CMS detected | allowed |
| Glendale, Arizona | Bar | F | No CMS detected | allowed |
| Phoenix, Arizona | Restaurant | F | No CMS detected | allowed |
| Wider corpus | Other | F | No CMS detected | allowed |
| Wider corpus | Other | F | No CMS detected | allowed |
| SaaS and software | Saas | F | No CMS detected | allowed |
| Government and education | Gov Edu | F | WordPress | allowed |
A sample from the live files. Names and websites are withheld here; they are in the file you buy. A business found with a defect is never named publicly before its owner has been contacted.
Every field: what a row holds · 25 free rows · a problem, country or industry we do not list: order a custom dataset.