a.klaviyo.com in a checkout page script inventory
a.klaviyo.com appeared on 17 of the 187 United States store cart pages we read on 30 August 2026, which is 9% of them, and on 8 it was loaded by a script or iframe tag, meaning it executed in the page.
What it is
Email and SMS marketing platform managing customer lists and automated messaging campaigns.
Source: the title and description published at klaviyo.com, read on 30 August 2026. Quoted there as “Klaviyo: AI Email Marketing & SMS | B2C CRM”.
What to write in the justification column
Verify tracking pixel implementation; ensure customer purchase history sent to Klaviyo excludes full card numbers.
This is a starting sentence, not an assessment. Requirement 6.4.3 wants your reason, written by someone at your company who can defend it.
Stores where we saw it
10 of 17
Up to ten examples from our scan. These are public storefronts and the observation is only that the host appeared in the HTML of their cart page on 30 August 2026.
Where to look next
Other hosts on klaviyo.com
Other email and sms hosts
All 448 hosts in the directory · Scan your own checkout page
Categories in this directory: Payment, Tag manager, Fraud and security, Consent, Analytics, Advertising, Email and SMS, Personalisation, Reviews, Chat and support, Loyalty, Subscriptions, Shipping and returns, Media and social, Fonts and CDN, Merchant-owned, Unclassified.