Sites that block Diffbot
1,137 of the 30,344 domains we have measured, 4%, disallow diffbot at the site root in robots.txt. Diffbot collects content that may be used to train a model.
Every domain here has withheld its content from Diffbot's training crawl. That is a separate decision from appearing in the operator's answers, which is governed by a different token.
1,137 of 30,344 measured domains (4%) disallow diffbot at the site root in robots.txt. Every domain named on this page was fetched directly and its robots.txt parsed against RFC 9309; none of it is inferred from a third-party index.
Measured 2026-08-25 by direct request to every domain in the corpus. Method: how this is measured. Reuse under CC BY 4.0 with attribution.
Cite as: Crawl Census, "Sites that block Diffbot", measured 2026-08-25. https://crawlcensus.com/blocked/diffbot
The list 1,137 domains
Rank is the domain's position in the popularity list used to seed the corpus; a dash means it was scanned on request rather than seeded. Score is the site's overall AI access score, which blocking depresses but does not by itself determine.
Check a specific domain
See also the Diffbot reference, the full census, and the JSON endpoint.