ClaudeBot vs CCBot: Which AI Crawler Should You Allow or Block?
Complete side-by-side comparison of ClaudeBot (Anthropic) and CCBot (Common Crawl): user-agent strings, safety ratings, SEO impact, and copy-paste blocking rules. Updated August 2026.
Quick Verdict
ClaudeBot has the better safety profile (Safe) compared to CCBot (Caution). If you allow only one, ClaudeBot is the lower-risk choice. CCBot warrants closer monitoring in your server logs, and server-level blocking if robots.txt directives are not respected.
| Attribute | ClaudeBot | CCBot |
|---|---|---|
| Operator | Anthropic | Common Crawl |
| User-agent string | ClaudeBot |
CCBot |
| Category | AI & LLM Bots | Data Scrapers |
| Safety rating | Safe | Caution |
| SEO impact if blocked | Low - No SEO ranking impact | Low - No SEO ranking impact |
| Recommendation | Generally safe to allow; provides legitimate crawling value. | Consider blocking based on your content strategy. |
| Official docs | ClaudeBot docs | CCBot docs |
What is ClaudeBot?
The main crawler for Anthropic. It scrapes the web to build the training dataset for the Claude family of AI models.
Full ClaudeBot guideWhat is CCBot?
CCBot is the crawler for Common Crawl, a non-profit that scrapes the web to provide open datasets. While useful for research, it consumes significant bandwidth.
Full CCBot guideHow to block each bot
Block ClaudeBot in robots.txt
User-agent: ClaudeBot Disallow: /
Block CCBot in robots.txt
User-agent: CCBot Disallow: /
Want to block or allow many bots at once? Use our free robots.txt generator with 196+ bot presets, then verify with the AI crawler checker.
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