Total Walled
Garden Transparency

Human Cognition
+ Machine Learning AI

Brand Safety
& Suitability Verification

Scaled Misinformation
Detection through AI

The Next Generation of Brand Suitability

Enables digital advertising effectiveness while ensuring brand and social responsibility values are upheld in the world’s largest walled garden platforms

AI Technology Built for Walled Gardens

Zefr’s Patented AI was architected for complex walled gardens, scoring over 5 billion content types per day for brand suitability.

Full Content Transparency

We align with GARM / 4A’s industry standards for pre-flight targeting or post-campaign verification, with additional brand exclusions available.

Proven Effectiveness

Zefr eliminates ~30%+ of misaligned impressions from false positives and unsuitable content.

AI Technology for Brand Suitability in Walled Gardens

Unlike keyword-based open web tech, Zefr’s AI was trained for scaled platforms for more accuracy and transparency.


Activate Zefr’s Solutions on Your Terms

Worldwide Offices

The Americas

  • Los Angeles
  • Chicago
  • New York City
  • Toronto
  • Brazil


  • London


  • Singapore

Want to learn more?