Kuldeep Paul

AI assistant · Anthropic

Claude

Web search launched in March 2025 and was found to use Brave Search results. Anthropic also runs Claude-SearchBot to build its own search quality signals.

Compiled by · Updated Oct 29, 2026

Operator
Anthropic
Launched
Mar 14, 2023 · web search Mar 20, 2025
Search index
Web search launched in March 2025 and was found to use Brave Search results. Anthropic also runs Claude-SearchBot to build its own search quality signals.Sources: techcrunch.com, simonwillison.net
Crawlers
ClaudeBot — blocked by 16.9% of top sitesClaude-SearchBot — blocked by 7.4% of top sitesClaude-User — blocked by 7.8% of top sites
Referrer in analytics
claude.ai
UTM tagging
None added
Ads
No. Anthropic has positioned Claude as ad-free.
Citations
Inline citations linking to fetched pages.
Official docs
support.claude.com

What this means for visibility

Anthropic's three bots are independent. Blocking ClaudeBot opts out of training; blocking Claude-SearchBot or Claude-User reduces visibility in Claude answers.

Questions

What search engine does Claude use?

Web search launched in March 2025 and was found to use Brave Search results. Anthropic also runs Claude-SearchBot to build its own search quality signals.

Which crawlers does Claude use?

Claude relies on ClaudeBot, Claude-SearchBot, Claude-User. Anthropic's three bots are independent. Blocking ClaudeBot opts out of training; blocking Claude-SearchBot or Claude-User reduces visibility in Claude answers.

How do I track Claude traffic in analytics?

Clicks from Claude arrive with the referrer claude.ai. Add it to an AI channel in GA4 using a source regex.

Does Claude show ads?

No. Anthropic has positioned Claude as ad-free.

Analysis using this data

  1. The opt-out asymmetry: you can block the small AI engines, not the big oneThe AI surfaces with the most users are the ones publishers can't refuse and can't measure.

Other AI engines

ChatGPT · ChatGPT Atlas · Google AI Overviews · Google AI Mode · Gemini · Perplexity · Comet · Microsoft Copilot · Meta AI · Grok · DeepSeek · Le Chat · You.com · Brave Search (Ask Brave) · Kagi Assistant · DuckDuckGo (Duck.ai & Search Assist) · Amazon Rufus (retired)

How to cite this data

This dataset is free to use, including commercially, under Creative Commons Attribution 4.0. The one rule is attribution:

  1. Credit the source as “Kuldeep Paul, kuldeep.cc” wherever you use a figure, chart or table from it.
  2. Link to this page (https://kuldeep.cc/data/ai-search/claude), not to the download file, so readers can check the source of every number.
  3. Include the date. These figures change; say “as of Oct 29, 2026” or link to the version you used.
  4. Mark changes. If you filter, recalculate or chart the data yourself, say so (“analysis based on data from…”).
  5. Cite the original source for single figures when you quote one reported number; it is linked in every row.

In running text: according to Kuldeep Paul's Claude — AI search engine reference (kuldeep.cc). More in the methodology.

APA

Paul, K. (2026). Claude — AI search engine reference [Data set]. kuldeep.cc. https://kuldeep.cc/data/ai-search/claude

MLA

Paul, Kuldeep. "Claude — AI search engine reference." kuldeep.cc, 29 October 2026, https://kuldeep.cc/data/ai-search/claude.

Chicago

Paul, Kuldeep. 2026. "Claude — AI search engine reference." Dataset. kuldeep.cc. Updated Oct 29, 2026. https://kuldeep.cc/data/ai-search/claude.

BibTeX

@misc{paul2026claude, author = {Paul, Kuldeep}, title = {Claude — AI search engine reference}, year = {2026}, howpublished = {\url{https://kuldeep.cc/data/ai-search/claude}}, note = {Dataset, CC BY 4.0, updated 2026-10-29} }

HTML link

<a href="https://kuldeep.cc/data/ai-search/claude">Claude — AI search engine reference</a> (data: Kuldeep Paul, kuldeep.cc)