[AI crawlers](https://www.crawlreadiness.com/crawlers) · Diffbot · AI answers · Counted in the score

# Diffbot

Diffbot is Diffbot's ai answers crawler token. Blocking it costs points in the AI readiness score. 17% of the top 1,000 websites with a robots.txt block it.

Extracts and structures web content for Diffbot's data products, including AI customers. Diffbot says its crawls follow robots.txt by default, with exceptions where a customer has an agreement with the site.

## Where this comes from

- **Documented by the vendor.** Source: [www.diffbot.com](https://www.diffbot.com/docs/crawl/faq/robots-txt)
- **Honours robots.txt.**
- **Counted in the readiness score.** It can keep a site out of AI search or answers, so a block costs points.

## In the top 1,000 websites

- **17% block it in robots.txt** (97 of the 569 sites with a robots.txt), as of 2026-10-12.
- Method, limits and the full data: [the October 2026 study of the top 1,000 websites](https://www.crawlreadiness.com/research/ai-crawler-access-october-2026).

## What blocking it costs

Diffbot says this token controls more than training, so a block can keep your pages out of its answers or product features. The score counts it, so a block costs points.

## The robots.txt lines

To let it in (a group that names the crawler replaces any wildcard rules for it, so this also lifts a `User-agent: *` block):

```
User-agent: Diffbot
Allow: /
```

To keep it out:

```
User-agent: Diffbot
Disallow: /
```

A rule in robots.txt is a request. Diffbot says this crawler honours it. The [robots.txt generator](https://www.crawlreadiness.com/tools/robots-txt) writes a whole file with the same split: block the training crawlers, keep the search and answer crawlers.

## Does Diffbot get through on your site?

[Run the free check](https://www.crawlreadiness.com/): it reads your robots.txt against all 51 crawlers and tells you which ones can read you, and what to change.

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Source: https://www.crawlreadiness.com/crawlers/diffbot