Cookie database › Klaviyo

__kla_session cookie

Marketing cookie set by Klaviyo.

Is __kla_session firing on your site before anyone says yes?

Conzent holds __kla_session and every other marketing cookie until the visitor accepts, and Consent Mode v2 keeps your Google Ads and GA4 reporting accurate. Registered IAB TCF CMP, Google-certified. From €7 per site a month.

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What the __kla_session cookie does

The __kla_id cookie, which is related to __kla_session, tracks visitors for email campaign attribution and audience syncing.

Who sets it

Consent category: marketing

Marketing cookies follow visitors across sites to build advertising profiles and to measure campaigns. They always require prior consent, and a consent banner has to block them until the visitor agrees.

Name__kla_session
CategoryMarketing
Set byKlaviyo

Other cookies from the same vendor

Is this cookie on your site?

Conzent's scanner lists every cookie your site sets, classifies each one the way this page does, and shows which are set before the visitor has consented. Try Conzent free for 14 days, or look up another cookie.

From the Conzent cookie database, last updated 2026-11-12. Descriptions come from vendor documentation, cookie policies and our own scans; write to support@getconzent.com to correct one.