Display & Programmatic Advertising

Pixalate’s Q3 2023 Web Seller Trust Index

Google AdExchange ranks in the top five for both U.S. and non-U.S. Web Seller Trust Indexes

Pixalate, the global market-leading ad fraud protection, privacy, and compliance analytics platform, today released the Q3 2023 Web Seller Trust Indexes, the comprehensive global seller quality ratings and rankings for programmatic advertising sold across desktop and mobile web.

Pixalate’s Seller Trust Indexes (STI) are the worldwide standards in programmatic advertising quality ratings. The indexes evaluate and rank the quality and integrity of key sellers in the programmatic supply chain across channels, platforms, and devices. Web STI rankings are based on a variety of seller factors, including invalid traffic (IVT), ads.txt transparency, viewability, and more.

Pixalate’s other indexes include the CTV Seller Trust Index for global Connected TV advertising and the Mobile Seller Trust Index for global mobile in-app advertising. See the full suite of Pixalate’s Seller Trust Indexes.

The Top Supply-Side Platforms (SSPs) for Programmatic Advertising Across Mobile & Desktop Web in Q3 2023

Here are the top five programmatic sellers of desktop and mobile web advertising inventory based on overall quality in Q3 2023.


  1. Yahoo — Final Score: 92 (A)
  2. Sovrn  — Final Score: 90 (A)
  3. Index Exchange — Final Score: 89 (A)
  4. Google AdExchange — Final Score: 88 (A)
  5. PubMatic – Final Score: 86 (A)

See the full Web Seller Trust Index – U.S. rankings here. 30 SSPs are ranked.


International (non-U.S.)

  1. Yahoo — Final Score: 92 (A)
  2. Google AdExchange — Final Score: 92 (A)
  3. OpenX  — Final Score: 91 (A)
  4. Xandr Monetize — Final Score: 87 (A)
  5. Sharethrough — Final Score: 84 (B)

See the full Web Seller Trust Index – non-U.S. rankings here. 29 SSPs are ranked.

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