Google Publisher Tag
545,414 websites

Google Publisher Tag is free to use

https://support.google.com/dfp_premium/topic/28788?hl=en&ref_topic=28149

Google Publisher Tag (GPT) is an ad tagging library with which you can dynamically build ad requests. GPT takes key details from you such as ad unit name, ad size, and custom targeting, builds the request, and displays the ad on web pages o...

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Sovrn
791,308 websites

Sovrn is free to use

http://www.sovrn.com

Publisher advertising network.

Market Share by Top Websites

1 Sovrn is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Google Publisher Tag is clearly lagging behind, losing to Sovrn in all segments.

Websites Categories

1 Sovrn has better usage coverage in more websites categories. Including Arts & Entertainment, Games, News & Media, Science & Education and 15 other categories.

2 Google Publisher Tag is leading in Computers Electronics & Technology, Sports, Vehicles, Business & Consumer Services and one other category.

Geography

1 Sovrn is leading in most countries, including United States, Russia, France, Taiwan and 145 other countries.

2 Google Publisher Tag is leading in Japan, South Korea, Hungary, Czech Republic and 11 other countries.