StatsAd Industry MetricsTop U.S. Ad Networks, December 2008

Top U.S. Ad Networks, December 2008

The top 50 ad networks in December by unique visitor.

In December comScore measured a panel of 190.7 million unique visitors to ad networks across the Web. AOL’s Platform-A, which includes Advertising.com, Quigo, and other properties, reached 91 percent of the online audience, or over 173 million unique visitors.

ComScore measures Internet usage from a global panel of home, work, and university Internet users.

Top 50 U.S. Ad Networks by Unique Visitor, December 2008
Rank Ad Network Unique Visitors (000) Reach (%) Rank Ad Network Unique Visitors (000) Reach (%)
Total 190,650 100
1 Platform-A** 173,804 91 26 YouTube.com 81,926 43
2 Yahoo network** 165,879 87 27 Centro-potential reach 79,294 42
3 ValueClick Networks** 159,420 84 28 Undertone Networks** 79,259 42
4 Google Ad Network 157,131 82 29 Vibrant Media** 78,370 41
5 Specific Media** 153,079 80 30 MySpace.com* 75,909 40
6 Traffic Marketplace** 147,024 77 31 Ask network 73,267 38
7 Yahoo 145,708 76 32 National Newspaper Network: total U.S. newspapers 72,178 38
8 24/7 Real Media** 142,448 75 33 IAC Ad Solutions 69,839 37
9 Adconian Media Group** 142,133 75 34 Gorilla Nation Media 69,676 37
10 Google 141,044 74 35 eBay 62,738 33
11 Tribal Fusion** 139,778 73 36 Kontera** 62,340 33
12 Tremor Media 137,407 72 37 Amazon.com 62,081 33
13 interCLICK** 137,076 72 38 Glam Media 61,129 32
14 Casale Media** 136,806 72 39 Pulse 360** 60,834 32
15 Collective Network** 126,294 66 40 ITN digital networks 60,060 32
16 Revenue Science** 126,261 66 41 MSN.com home page 56,543 30
17 DRIVEpm** 126,158 66 42 TattoMedia 56,284 30
18 Turn Inc.** 123,150 65 43 Facebook 54,552 29
19 CPX Interactive** 118,305 62 44 IB Local Network 53,461 28
20 ADSDAQ by ContextWeb** 117,025 61 45 National Newspaper Network: top 24 newspapers 49,520 26
21 BrightRoll Video Network 114,333 60 46 Adify** 48,974 26
22 Burst Media** 112,601 59 47 Business.com network 47,695 25
23 MSN-Windows Live 112,223 59 48 Wal-Mart Stores Inc. 46,049 24
24 AOL Media Network 109,879 58 49 YuMe Video Network 45,860 24
25 AdBrite** 87,826 46 50 QuadrantONE 44,940 24
Notes:
1. Reach denotes the percentage of the total Internet population that viewed a particular entity at least once in December.
2. * denotes entity has assigned some portion of traffic to other syndicated entities.
3. ** denotes an advertising network.
4. † denotes custom entities representing the number of unduplicated visitors to sites with which the specified ad network has contracted to deliver advertising. Unlike entities marked as advertising networks (**), custom entities don’t represent the total number of visitors actually reached by ads via the ad network.
5. The Platform A ad network is an aggregation of ad servers used by the following individual advertising network entities: Advertising.com, Tacoda, AOL, Quigo, and Userplan.
Source: comScore, 2008

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