In Brief
- Core Answer: Claude SEO is the practice of making a brand retrievable, quotable and recommendable by Anthropic's Claude when it searches the web to answer a question. Claude matters out of proportion to its size: it holds about 1.3% of AI platform visits but sends roughly 18% of B2B AI referral traffic, because its users are researching and click through. Getting cited by Claude comes down to three crawlers you must allow, content a research-oriented reader can quote, and corroboration Claude can verify.
- Why It Matters: Most AI visibility programs optimize for ChatGPT and Google and treat Claude as a rounding error. The referral data says Claude is the second-largest source of B2B AI traffic and the fastest-growing, and its users convert like researchers, not browsers.
- Best For: B2B marketers and SEO leads who want to understand how Claude searches, how to get cited by Claude, and how to measure what it sends.
Claude SEO — earning visibility inside Claude's answers — is the most underweighted opportunity in AI search in 2026. The numbers explain why. In Goodie's 2026 AI search traffic study, Claude's share of measurable B2B AI referrals rose from 1.4% to 18.5% in a year, second only to ChatGPT and rising while ChatGPT's share fell. Claude generates that traffic from a fraction of ChatGPT's audience: it holds about 1.3% of AI platform visits but around 18% of referral share, an over-referral ratio of roughly 14 to 1. Claude users search to research, and when Claude cites a source they click it. Profound's research adds a wrinkle worth knowing — Claude and Claude Code behave as distinct answer engines with different citation patterns — and Anthropic's own documentation tells you exactly which crawlers to let in. This guide covers how Claude searches, how to get cited, and how to measure it.
How Claude Searches the Web
Claude gained web search in March 2025. When a question needs current or specific information, Claude runs searches, fetches pages, reads them, and answers with inline citations to the sources it used. Three properties shape what gets cited.
- It is an agentic retriever. Claude plans and iterates — multiple searches, follow-up fetches, evaluation of what it has read — the pattern described in agentic search. Passages that answer a specific sub-question cleanly get quoted.
- It fetches pages on demand. Beyond any index, Claude retrieves the live page when a user's question calls for it. If the page is blocked, slow, or client-rendered, there is nothing to cite.
- It is used for research. Goodie's data shows a high click-out rate and a 57.9% bounce rate on Claude referrals — people arriving to verify and read, then leaving. That is exactly the traffic a B2B buyer's journey produces at the evaluation stage.
The Three Anthropic Crawlers You Must Allow
Anthropic documents three user agents, and the distinction matters because blocking the wrong one removes you from Claude's answers without affecting model training at all.
User agent | What it does | If you block it |
|---|---|---|
ClaudeBot | Collects data that may be used for training | No effect on whether Claude cites you today |
Claude-User | Fetches a page when a user asks Claude something that requires it | Claude cannot read your page during a conversation, so it cannot cite it |
Claude-SearchBot | Crawls to improve search result quality | Your pages are less likely to surface in Claude's search step |
Many sites blocked "Claude" wholesale in 2024–2025 when the debate was about training data. If yours did, you are now invisible to Claude's search and fetch behavior. Allow Claude-User and Claude-SearchBot in robots.txt regardless of your position on ClaudeBot; the AI crawlers guide covers the equivalent split for OpenAI, Perplexity and Google.
Claude SEO: How to Get Cited by Claude
1. Be fetchable
Server-rendered HTML, fast responses, no bot-management rules that challenge Claude-User, and no important content behind JavaScript that only executes in a browser. Test by asking Claude to summarize a specific page on your site; if it cannot, nothing else on this list matters.
2. Write for a research reader
Claude quotes passages that state a fact, a definition, a number or a comparison directly, with the source's reasoning visible. Self-contained sections with a clear heading and the answer in the first sentence outperform long narrative. Tables are quoted often. This is the same discipline as generative engine optimization generally; Claude simply rewards it more consistently because its users are checking the work.
3. Be corroborated
Claude cross-checks. A claim that exists only on your site is weak; the same claim on your site, in an industry publication, and in a review or directory is strong. The corroboration program in earning AI citations applies unchanged.
4. Be an unambiguous entity
Claude needs to be certain which company you are before it will recommend you. Consistent naming, a clear About page, structured Organization data and a coherent third-party footprint — the entity SEO fundamentals — reduce the chance Claude conflates you with a similarly named business or omits you out of caution.
5. Cover the comparison and evaluation questions
Because Claude usage skews to research, the queries that produce citations are disproportionately "X vs Y," "best tools for," "how to evaluate," and "what does it cost." Pages that answer those honestly — including reviews of alternatives — earn Claude citations that pure product pages do not.
Claude vs ChatGPT vs Perplexity: What Differs
Dimension | Claude | ChatGPT | Perplexity |
|---|---|---|---|
User intent | Research, verification, writing | Broad; increasingly shopping and commercial | Research and news |
Referral behavior | Over-refers ~14x relative to visits | Roughly proportional to visits | Over-refers ~3.7x |
Crawler control | Three documented agents; search and fetch separable from training | OAI-SearchBot, ChatGPT-User, GPTBot | PerplexityBot, Perplexity-User |
Ads | None | Sponsored cards for Free and Go users | Limited |
What gets cited | Passages that support a specific claim; comparison and evaluation content | Broader mix; product and listicle pages rising | Numbered sources per claim |
The practical consequence is that a program tuned only for ChatGPT — product pages, shopping feeds, paid cards — under-serves Claude, whose users want the comparison, the methodology and the number. The two are complementary, and the referral data says the second one is where B2B pipeline is increasingly starting.
Measuring Claude Traffic and Visibility
- Tag the referrer. Claude referrals arrive from claude.ai; create a channel grouping so they are not absorbed into generic referral or direct traffic. GA4 AI search attribution covers the setup.
- Track citations, not just sessions. Most monitoring tools cover Claude only on higher tiers; confirm coverage before assuming your dashboard sees it. See AI visibility tracking.
- Separate Claude from Claude Code. Profound's finding that the two cite differently means developer-facing brands should measure both.
- Judge on downstream conversion. Claude sessions bounce more and convert later. Compare pipeline influence per session, not bounce rate.
Frequently Asked Questions
What is Claude SEO?
Making a brand retrievable, quotable and recommendable by Anthropic's Claude when it searches the web — by allowing its crawlers, writing content a research reader can cite, corroborating claims off-site, and being an unambiguous entity.
How do I get cited by Claude?
Allow Claude-User and Claude-SearchBot in robots.txt, serve fast server-rendered pages, write self-contained sections that answer specific questions with facts and comparisons, and get the same claims published in third-party sources Claude can verify.
Does Claude send real traffic?
Yes. In 2026 B2B referral data Claude accounted for about 18.5% of measurable AI referrals — second to ChatGPT and growing — from a much smaller user base, because its users click through to verify sources.
Should I block ClaudeBot?
That is a training-data policy decision. Blocking ClaudeBot does not affect citations. Blocking Claude-User or Claude-SearchBot does — it removes you from Claude's answers.
Is Claude SEO different from ChatGPT SEO?
The fundamentals are shared. The differences are in user intent (research versus broad and commercial), in which content earns citations (comparisons and methodology versus product and listicle pages), and in crawler controls. A program built only for ChatGPT will under-serve Claude.
References
- https://support.anthropic.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler
- https://www.anthropic.com/news/web-search
- https://higoodie.com/blog/ai-search-traffic-report-2026/
- https://www.tryprofound.com/blog
- https://platform.openai.com/docs/bots