4.1% of the 443 scored sites in Drupal fail the test of whether robots.txt lets AI search crawlers in (RCH-1). A further 45 refused the scanner and are not counted.

Sites: 18 of 443 scored sites
Group: Drupal
Test: RCH-1: Can the AI tools that search the web read your site?
Edition: Census Q4 2026, Index 12.1, computed 2026-11-06
Caveat: A public roster, not a random sample of the web; says nothing about sites outside Drupal.

How to check

The group and its sites: Drupal.
How the census is run: methodology.
The figures: summary.json or claims.json.
Every published figure: all claims for the United States.

Link to this claim: https://readinessindex.io/census/2026-Q4/us/claims/drupal-rch1-fail

Cite as TEN7 Readiness Index Census 2026-Q4

Source reply: Source: TEN7 Readiness Index Census 2026-Q4 (Index 12.1). Drupal, United States, n = 443. Public rosters, not a random sample of the web. Figures are CC BY 4.0. Data: https://readinessindex.io/census/2026-Q4/us/claims/drupal-rch1-fail