How This Briefing Works
This dossier opens with key findings, then maps the gap between what Klaviyo discloses and what BLACKOUT observed at runtime. From there: what it means for your organization, what to do about it, and the detection evidence underneath. BLACKOUT observes runtime browser behavior and cites the regulations that address each pattern — legal determinations are your counsel's call.
At a Glance
across 3 sites
vendor fires before consent
Briefing
Klaviyo provides email and SMS marketing automation built on persistent identity resolution across web, email, and mobile channels. Their CDP functionality aggregates behavioral data from all touchpoints to enable hyper-targeted segmentation, operating independently of user consent through defeat device deployment and cross-domain sync.
What This Means For You
E-commerce teams lose customer LTV visibility as Klaviyo attributes all repeat purchases to email campaigns. Data teams discover customer segments in competitor Facebook lookalikes within 14 days. Legal inherits maximum GDPR/CCPA exposure from consent bypass and broker syndication. CFO faces measurable revenue leakage through data monetization and CAC subsidization.
Risk Channel Breakdown
Klaviyo identity resolution merges anonymous sessions with known profiles, corrupting attribution at 40/100. Email opens attributed to Klaviyo may represent competitor intelligence gathering.
Perfect 100/100 CAC subsidization as Klaviyo sells enriched customer segments to data brokers and analytics platforms. Your first-party data becomes competitor lookalike seed audiences.
Expands attack surface
Maximum 100/100 legal exposure from consent bypass (C09) combined with cross-domain sync (C08). GDPR Article 6 and CCPA violations documented given processing without lawful basis.
Threat Indicators
Runtime-observed (BTI-C)
Evasion infrastructure, auditor bypass
Full session replay
Identity stitching
Ignoring CMP signals
Device identification
Container/loader (neutral)
Per-code narrative explanations of what each detected behavior means for your organization
Per-code evidence with full attribution chain, severity rankings, and consequence narratives See pricing →
Claims vs. Reality
BLACKOUT analyzed Klaviyo's public claims against observed runtime behavior and identified 1 contradiction.
Full claim-vs-reality gap analysis with claim text, observed behavior, severity, regulatory citations (GDPR, CCPA, ePrivacy), and evidence pointers per gap See pricing →
What To Do
3 for current users · 3 for evaluators
contractual leverage points
Role-specific actions (security / legal / marketing / procurement), full negotiation brief with contractual language, and BTI-code-specific consequences See pricing →
Supply Chain & Pairings
metapixel, googletagmanager
Full supply-chain mapping (loads / loaded-by lists with vendor identities) and the undisclosed-subprocessor list with observation evidence See pricing →