Quantcast Choice Compliance Checker Verify Your Setup Is Working
Quantcast Choice is a popular consent platform for ad-funded publisher sites with complex vendor lists. But IAB TCF compliance depends on every vendor in your stack respecting the consent string - and header bidding partners, demand-side pixels, and analytics scripts can fire outside Quantcast's control without any warning.
We work alongside Quantcast Choice - not against it
Quantcast Choice manages your TCF consent configuration and vendor list. We independently verify that configuration produces the right outcome in a real browser - catching issues that Quantcast cannot see from inside the page.
What we verify that Quantcast Choice alone cannot confirm
Quantcast Choice controls what it controls. These six checks require independent observation from outside the page.
| Check | Why Quantcast Choice alone cannot confirm it |
|---|---|
| Pre-consent cookies | Quantcast Choice relies on IAB TCF to manage vendor consent strings - but ad network pixels, header bidding wrappers, and third-party analytics scripts can fire before the TCF string is written. |
| Google Consent Mode v2 signals | Quantcast generates TCF consent signals, but the presence and timing of all 4 Consent Mode v2 parameters (ad_user_data, ad_personalization) require independent verification from outside the page. |
| Reject All enforcement | Publisher ad stacks are complex. A new demand partner, prebid adapter, or tag manager rule can introduce scripts that fire regardless of the TCF consent string Quantcast manages. |
| GPC signal handling | Global Privacy Control must be tested at the browser level. Quantcast can be configured to respect GPC signals - but configuration alone does not confirm correct behavior in a live session. |
| Dark pattern checks | Quantcast provides the consent UI framework. The implementation choices - button contrast, pre-selected vendors, banner dismissibility - are made during setup and sit outside Quantcast's enforcement. |
| Multi-region behavior (up to 15 regions) | Quantcast uses geo-targeted rules for GDPR, CCPA, and other frameworks. We test from actual jurisdiction IPs to verify that region-specific consent flows activate correctly. |
How we detect Quantcast Choice on your site
Four independent fingerprint signals confirm Quantcast Choice is present and active.
JavaScript globals
__cmp, __tcfapi, quantserve
DOM elements
.qc-cmp-ui-container, .qc-cmp2-container
Consent cookies
euconsent-v2, addtl_consent, __qca
Script domains
quantcast.mgr.consensu.org, cmp.quantcast.com
See the full list of 40+ detected CMPs: Supported CMPs
Verify your Quantcast Choice configuration works end-to-end
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