Top U.S. Ad Networks, August 2008

In August comScore measured a panel of 188.9 million unique visitors’ activity on ad networks. AOL’s Platform-A, which includes Advertising.com, Quigo, and other ad networks, reached 90 percent of the audience, or 170.7 million unique visitors. Close behind were Yahoo’s network with 162.2 million and Google’s ad network with 156.4 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, August 2008
Rank Ad Network Unique Visitors (000) Reach (%) Rank Ad Network Unique Visitors (000) Reach (%)
Total 188,937 100
1 Platform-A** 170,728 90 26 Undertone Networks** 81,639 43
2 Yahoo network** 162,224 86 27 AdBrite** 81,310 43
3 Google network** 156,415 83 28 MySpace* 75,491 40
4 Specific Media** 152,501 81 29 YouTube 75,425 40
5 ValueClick networks** 150,813 80 30 Vibrant Media** 74,792 40
6 Tribal Fusion** 142,840 76 31 National Newspaper Network: total U.S. newspapers 72,202 38
7 Yahoo 139,807 74 32 Gorilla Nation Media† 66,124 35
8 Google 136,484 72 33 Ybrant/Oridian/AdDynamix network** 61,066 32
9 YuMe video network† 129,871 69 34 MSN.com: home page 58,727 31
10 MediaNet (Casale Media)** 129,195 68 35 Ask network 58,482 31
11 Traffic Marketplace** 128,893 68 36 eBay 58,303 31
12 Tremor Media† 126,314 67 37 Pulse 360** 57,646 31
13 Adconion Media Group** 124,532 66 38 Kontera** 55,288 29
14 24/7 Real Media** 123,808 66 39 IAC Advertising Solutions† 53,677 28
15 interCLICK** 122,478 65 40 Intergi† 52,461 28
16 Revenue Science** 121,893 65 41 National Broadband Network† 52,236 28
17 ADRIVEpm** 117,188 62 42 IB Local Network 51,148 27
18 CPX Interactive** 115,710 61 43 National Newspaper Network: top 25 newspapers 49,070 26
19 MSN Windows Live 111,258 59 44 MapQuest 47,276 25
20 AOL Media Network 110,623 59 45 Amazon.com 46,830 25
21 ADSDAQ (ContextWeb)** 108,574 57 46 AdOn Network** 45,740 24
22 Collective Media** 107,943 57 47 Tatto Media** 44,278 23
23 Burst Media** 96,648 51 48 quadrantONE† 43,599 23
24 Turn Inc.** 94,042 50 49 eBay: home page 41,831 22
25 Centro† 81,836 43 50 Facebook 40,959 22
Notes:
1. Reach denotes the percentage of the total Internet population that viewed a particular entity at least once in August.
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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