Cookie Policy

FIRST SEEN 2026-07-29 · VERSION 20260729_rev01 · COMPARED WITH 20260722_rev01

Full text changes — 20260722_rev01 to 20260729_rev01

COLOUR MARKS THE SEVERITY OF A FLAGGED CLAUSE · + AND − MARK ADDED AND REMOVED

+. [All Collections](https://privacy.claude.com/en/)
+. [Consumers](https://privacy.claude.com/en/collections/10663362-consumers)
+. [Cookies](https://privacy.claude.com/en/collections/10702218-cookies)
+. What Cookies Does Anthropic Use?
+April 7, 2026
+Table of contents
+The following tables provide brief descriptions of the cookies used on Anthropic websites.
+These tables may be updated from time to time. Please take a look at our [Cookie Policy](https://www.anthropic.com/legal/cookies) if you'd like more information on how and why we use cookies.
+## **Necessary Cookies**
+Necessary cookies are used to provide basic functionality of our Services and cannot be refused - for example: authentication, site preferences (including cookie opt-out preference), or security.
+<table><tbody><tr><td data-colwidth="143"><p><b>Cookie Name</b></p></td><td data-colwidth="131"><p><b>Purpose</b></p></td><td data-colwidth="152"><p><b>Domain</b></p></td><td data-colwidth="107"><p><b>First or Third Party</b></p></td><td><p><b>Lifespan</b></p></td></tr><tr><td data-colwidth="143"><p>sessionKey</p></td><td data-colwidth="131"><p>Authentication</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai, console.anthropic.com</p></td><td data-colwidth="107"><p>First</p></td><td><p>1 month</p></td></tr><tr><td data-colwidth="143"><p>sessionKeyV2</p></td><td data-colwidth="131"><p>Authentication</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai, console.anthropic.com</p></td><td data-colwidth="107"><p>First</p></td><td><p>1 hour</p></td></tr><tr><td data-colwidth="143"><p>activitySessionId</p></td><td data-colwidth="131"><p>Authentication</p></td><td data-colwidth="152"><p>.anthropic.com, claude.ai, .console.anthropic.com</p></td><td data-colwidth="107"><p>First</p></td><td><p>12 hours</p></td></tr><tr><td data-colwidth="143"><p>CH-prefers-color-scheme</p></td><td data-colwidth="131"><p>Preferences</p></td><td data-colwidth="152"><p>.anthropic.com, claude.ai, .console.anthropic.com</p></td><td data-colwidth="107"><p>First</p></td><td><p>1 year</p></td></tr><tr><td data-colwidth="143"><p>lastActiveOrg</p></td><td data-colwidth="131"><p>Preferences</p></td><td data-colwidth="152"><p>.anthropic.com, claude.ai,</p></td><td data-colwidth="107"><p>First</p></td><td><p>1 year</p></td></tr><tr><td data-colwidth="143"><p>__ssid</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai</p></td><td data-colwidth="107"><p>First</p></td><td><p>13 months</p></td></tr><tr><td data-colwidth="143"><p>anthropic-device-id</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>claude.ai,</p><p>.console.anthropic.com</p></td><td data-colwidth="107"><p>First</p></td><td><p>10 months</p></td></tr><tr><td data-colwidth="143"><p>anthropic-consent-preferences</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai</p></td><td data-colwidth="107"><p>First</p></td><td><p>1 year</p></td></tr><tr><td data-colwidth="143"><p>console-sidebar-expanded</p></td><td data-colwidth="131"><p>Preferences</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai</p></td><td data-colwidth="107"><p>First</p></td><td><p>1 year</p></td></tr><tr><td data-colwidth="143"><p>user-sidebar-visible-on-load</p></td><td data-colwidth="131"><p>Preferences</p></td><td data-colwidth="152"><p>.claude.ai</p></td><td data-colwidth="107"><p>First</p></td><td><p>1 year</p></td></tr><tr><td data-colwidth="143"><p>__stripe_mid</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai</p></td><td data-colwidth="107"><p>Stripe</p><div><p>(<a href="https://stripe.com/cookie-settings" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>1 year</p></td></tr><tr><td data-colwidth="143"><p>__cf_bm</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, claude.ai, .console.anthropic.com</p></td><td data-colwidth="107"><p>Cloudflare</p><div><p>(<a href="https://developers.cloudflare.com/fundamentals/reference/policies-compliances/cloudflare-cookies/#__cf_bm-cookie-for-cloudflare-bot-products" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>30 minutes</p></td></tr><tr><td data-colwidth="143"><p>cf_clearance</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, claude.ai, .console.anthropic.com</p></td><td data-colwidth="107"><p>Cloudflare</p><div><p>(<a href="https://developers.cloudflare.com/fundamentals/reference/policies-compliances/cloudflare-cookies/#additional-cookies-used-by-the-challenge-platform" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>1 year</p></td></tr><tr><td data-colwidth="143"><p>Google security cookies (<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">various</a>)</p></td><td data-colwidth="131"><p>Functionality and Security</p></td><td data-colwidth="152"><p>.google.com</p></td><td data-colwidth="107"><p>Google</p><div><p>(<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>various</p><div><p>(<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td></tr><tr><td data-colwidth="143"><p>intercom-device-id-#######</p></td><td data-colwidth="131"><p>Functionality and Security</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai</p></td><td data-colwidth="107"><p>Intercom</p><div><p>(<a href="https://www.intercom.com/help/en/articles/2361922-intercom-messenger-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>9 months</p></td></tr><tr><td data-colwidth="143"><p>intercom-id-#######</p></td><td data-colwidth="131"><p>Support Preferences</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai</p></td><td data-colwidth="107"><p>Intercom</p><div><p>(<a href="https://www.intercom.com/help/en/articles/2361922-intercom-messenger-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>1 week</p></td></tr><tr><td data-colwidth="143"><p>intercom-session-#######</p></td><td data-colwidth="131"><p>Support Preferences</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.ai</p></td><td data-colwidth="107"><p>Intercom</p><div><p>(<a href="https://www.intercom.com/help/en/articles/2361922-intercom-messenger-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>1 week</p></td></tr><tr><td data-colwidth="143"><p>__Secure-ROLLOUT_TOKEN</p></td><td data-colwidth="131"><p>Functionality</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.com</p></td><td data-colwidth="107"><p>YouTube</p><div><p>(<a href="https://policies.google.com/technologies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>6 months</p></td></tr><tr><td data-colwidth="143"><p>__Secure-YEC</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.com</p></td><td data-colwidth="107"><p>YouTube</p><div><p>(<a href="https://policies.google.com/technologies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>13 months</p></td></tr><tr><td data-colwidth="143"><p>__Secure-YENID</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.com</p></td><td data-colwidth="107"><p>YouTube</p><div><p>(<a href="https://policies.google.com/technologies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>13 months</p></td></tr><tr><td data-colwidth="143"><p>__Secure-YNID</p></td><td data-colwidth="131"><p>Support Preferences</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.com</p></td><td data-colwidth="107"><p>YouTube</p><div><p>(<a href="https://policies.google.com/technologies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>6 months</p></td></tr><tr><td data-colwidth="143"><p>VISITOR_INFO1_LIVE</p></td><td data-colwidth="131"><p>Security Advertising</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.com</p></td><td data-colwidth="107"><p>YouTube</p><div><p>(<a href="https://policies.google.com/technologies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>6 months</p></td></tr><tr><td data-colwidth="143"><p>VISITOR_PRIVACY_METADATA</p></td><td data-colwidth="131"><p>Functionality</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.com</p></td><td data-colwidth="107"><p>YouTube</p><div><p>(<a href="https://policies.google.com/technologies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>6 months</p></td></tr><tr><td data-colwidth="143"><p>YSC</p></td><td data-colwidth="131"><p>Security</p></td><td data-colwidth="152"><p>.anthropic.com, .claude.com</p></td><td data-colwidth="107"><p>YouTube</p><div><p>(<a href="https://policies.google.com/technologies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>Session</p></td></tr></tbody></table>
+## Analytics Cookies
+Analytics cookies are not necessary to deliver our Services, but they do enhance performance of our Services - for example: analyzing website traffic or performance, or understanding how you interact with our website or Services. You can control how and when your personal data is shared or used by clicking here or enabling global privacy controls.
+<table><tbody><tr><td data-colwidth="166"><p><b>Cookie Name</b></p></td><td data-colwidth="127"><p><b>Purpose</b></p></td><td data-colwidth="156"><p><b>Domain</b></p></td><td data-colwidth="102"><p><b>First or Third Party</b></p></td><td><p><b>Lifespan</b></p></td></tr><tr><td data-colwidth="166"><p>ajs_anonymous_id, ajs_user_id</p></td><td data-colwidth="127"><p>Performance and Analytics</p></td><td data-colwidth="156"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="102"><p>First</p></td><td><p>1 year</p></td></tr><tr><td data-colwidth="166"><p>Google Analytics cookies (<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">various</a>)</p></td><td data-colwidth="127"><p>Performance and Analytics</p></td><td data-colwidth="156"><div><p>various (<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="102"><p>Google</p><div><p>(<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>various</p><div><p>(<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td></tr><tr><td data-colwidth="166"><p>li_giant</p></td><td data-colwidth="127"><p>Conversion tracking analytics</p></td><td data-colwidth="156"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="102"><p>LinkedIn</p><div><p>(<a href="https://www.linkedin.com/legal/l/cookie-table#thirdparty" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>7 days</p></td></tr><tr><td data-colwidth="166"><p>oribi_cookie_test</p></td><td data-colwidth="127"><p>Conversion tracking analytics</p></td><td data-colwidth="156"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="102"><p>LinkedIn</p><div><p>(<a href="https://www.linkedin.com/legal/l/cookie-table#thirdparty" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>Session</p></td></tr><tr><td data-colwidth="166"><p>oribili_user_guid</p></td><td data-colwidth="127"><p>Analytics</p></td><td data-colwidth="156"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="102"><p>LinkedIn</p><div><p>(<a href="https://www.linkedin.com/legal/l/cookie-table#thirdparty" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>1 year</p></td></tr><tr><td data-colwidth="166"><p>ln_or</p></td><td data-colwidth="127"><p>Analytics</p></td><td data-colwidth="156"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="102"><p>LinkedIn</p><div><p>(<a href="https://www.linkedin.com/legal/l/cookie-table#thirdparty" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td><p>1 day</p></td></tr></tbody></table>
+## Marketing Cookies
+Marketing cookies are not necessary to deliver our Services, but they do help us market our Services more effectively to users that we, our service providers, and our business partners believe may be interested in using our Services. They also help provide us with aggregated reporting and help us know when marketing content has been shown to you. You can control how and when your personal data is shared or used by clicking here or enabling global privacy controls.
+<table><tbody><tr><td data-colwidth="168"><p><b>Cookie Name</b></p></td><td data-colwidth="106"><p><b>Purpose</b></p></td><td data-colwidth="133"><p><b>Domain</b></p></td><td data-colwidth="107"><p><b>First or Third Party</b></p></td><td data-colwidth="107"><p><b>Lifespan</b></p></td></tr><tr><td data-colwidth="168"><p>Google Advertising cookies (<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">various</a>)</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>various</p><div><p>(<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>Google</p><div><p>(<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>various</p><div><p>(<a href="https://business.safety.google/adscookies/" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td></tr><tr><td data-colwidth="168"><p>_fbc</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="107"><p>Facebook</p><div><p>(<a href="https://www.facebook.com/privacy/policies/cookies?subpage=subpage-1.7" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>2 years</p></td></tr><tr><td data-colwidth="168"><p>_fbp</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="107"><p>Facebook</p><div><p>(<a href="https://www.facebook.com/privacy/policies/cookies?subpage=subpage-1.7" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>90 days</p></td></tr><tr><td data-colwidth="168"><p>_rdt_uuid</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="107"><p>Reddit</p><div><p>(<a href="https://www.reddit.com/policies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>1 year</p></td></tr><tr><td data-colwidth="168"><p>_rdt_cid</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="107"><p>Reddit</p><div><p>(<a href="https://www.reddit.com/policies/cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>1 year</p></td></tr><tr><td data-colwidth="168"><p>_ttclid</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.anthropic.com, claude.ai</p></td><td data-colwidth="107"><p>TikTok</p><div><p>(<a href="https://www.tiktok.com/legal/page/global/tiktok-website-cookies-policy/en" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>90 days</p></td></tr><tr><td data-colwidth="168"><p>guest_id</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.twitter.com</p></td><td data-colwidth="107"><p>Twitter</p><div><p>(<a href="https://help.x.com/en/rules-and-policies/x-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>348 days</p></td></tr><tr><td data-colwidth="168"><p>guest_id_ads</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.twitter.com</p></td><td data-colwidth="107"><p>Twitter</p><div><p>(<a href="https://help.x.com/en/rules-and-policies/x-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>348 days</p></td></tr><tr><td data-colwidth="168"><p>guest_id_marketing</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.twitter.com</p></td><td data-colwidth="107"><p>Twitter</p><div><p>(<a href="https://help.x.com/en/rules-and-policies/x-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>348 days</p></td></tr><tr><td data-colwidth="168"><p>personalization_id</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.twitter.com</p></td><td data-colwidth="107"><p>Twitter</p><div><p>(<a href="https://help.x.com/en/rules-and-policies/x-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>348 days</p></td></tr><tr><td data-colwidth="168"><p>muc</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.t.co</p></td><td data-colwidth="107"><p>Twitter</p><div><p>(<a href="https://help.x.com/en/rules-and-policies/x-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>400 days</p></td></tr><tr><td data-colwidth="168"><p>muc_ads</p></td><td data-colwidth="106"><p>Targeted Marketing</p></td><td data-colwidth="133"><p>.t.co</p></td><td data-colwidth="107"><p>Twitter</p><div><p>(<a href="https://help.x.com/en/rules-and-policies/x-cookies" rel="nofollow noopener noreferrer" target="_blank">more info</a>)</p></div></td><td data-colwidth="107"><p>400 days</p></td></tr></tbody></table>
+## Cookie Settings
+You can control how and when your personal data is shared or used in the following ways:
+- * *
+Related Articles
+- [Is my data used for model training?](https://privacy.claude.com/en/articles/7996868-is-my-data-used-for-model-training)
+- [Does Anthropic crawl data from the web, and how can site owners block the crawler?](https://privacy.claude.com/en/articles/8896518-does-anthropic-crawl-data-from-the-web-and-how-can-site-owners-block-the-crawler)
+- [What Cookies Does Anthropic Use?](https://privacy.claude.com/en/articles/9020432-what-cookies-does-anthropic-use)
+- [Is my data used for model training?](https://privacy.claude.com/en/articles/10023580-is-my-data-used-for-model-training)