Here they are broken down by category:
- Advertiser ad servers: DoubleClick (DFA), Mediaplex
- Rich media agencies: DoubleClick Rich Media, Eyeblaster, EyeWonder, Interpolls, PointRoll, Unicast
- Research firms: Dynamic Logic, IAG Research, InsightExpress, Factor TG
Google says it will be certifying more third party advertisers in the future.
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