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Quantcast

Quantcast

Demand-side platform and audience intelligence tool used by advertisers and agencies for programmatic buying. Quantcast Measure (publisher analytics) and Quantcast Advertise (DSP) scripts fire on publisher and advertiser sites to collect audience signals and attribution data.

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Overview

Quantcast is a demand-side platform and audience measurement service. Quantcast Measure provides publisher audience analytics, while Quantcast Advertise powers programmatic ad buying with AI-driven audience targeting.

What This Script Does

  • Fires a measurement tag on publisher pages to collect audience demographic and interest data
  • Sets cookies to build persistent user profiles across sites in the Quantcast measurement network
  • Collects page URLs, referrers, device information, and browsing patterns for audience segmentation
  • Syncs user identifiers with advertising partners for cross-platform targeting
  • On advertiser sites, tracks conversion events and attributes them to Quantcast ad campaigns
  • Participates in real-time bidding auctions for programmatic ad delivery

Consent & Compliance

  • Category: Marketing / Analytics
  • GDPR: Requires consent. Builds cross-site user profiles, syncs identifiers with ad partners, and performs behavioral targeting.
  • CCPA: Cross-site audience profiling and identifier syncing qualifies as sale/sharing of personal information.
  • ePrivacy: Sets multiple tracking and advertising cookies. Consent required.

Should You Block This Without Consent?

Yes. Quantcast performs cross-site audience profiling and advertising targeting. Block until marketing consent is granted.

Is Quantcast GDPR compliant?

Quantcast typically loads marketing and analytics trackers, which are not strictly necessary for your site to work. Under the GDPR and the ePrivacy Directive, non-essential cookies and trackers must stay blocked until a visitor gives clear opt-in consent. So Quantcast can be fully GDPR compliant, but only if your site holds its scripts until consent is granted and lets visitors decline just as easily. Compliance depends on how your site loads Quantcast, not on Quantcast itself.

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Consent Categories

MarketingAnalytics

Also Known As

QuantcastQuantcast MeasureQuantcast AdvertiseDSPaudience intelligenceprogrammatic advertisingpublisher analytics

Industries

Computers Electronics and Technology

Tracked Domains (1)

Quantcast's trackers are common, seen on about 7% of the sites ConsentStack has scanned. Scan your own site to see which of these are firing before consent.

quantserve.comMarketing

quantserve.com is a marketing domain operated by Quantcast, used to serve ads, build audiences, and measure ad conversions. Seen on about 7% of scanned sites.

Cookies Quantcast Sets (1)

__qca

Quantcast Measure visitor identifier for audience analytics.

Frequently Asked Questions

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ConsentStack automatically detects and manages Quantcast trackers so your site stays compliant with global privacy regulations.

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