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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Taboola
547,891 websites

Taboola offers both free and paid options

http://www.taboola.com/

Taboola is a content marketing platform that provides a web widget to content creators on their website to show "Content You May Like" that includes links to related articles, videos, and slideshows, both from within the site and from other...

Market Share by Top Websites

1 Taboola is leading in The Entire Web.

2 Google Publisher Tag is leading in Top 10K Sites, Top 100K Sites and Top 1M Sites.

Websites Categories

1 Google Publisher Tag has better usage coverage in more websites categories. Including Arts & Entertainment, Computers Electronics & Technology, Games, News & Media and 16 other categories.

2 Taboola is leading in Adult, Community & Society, Lifestyle and Hobbies & Leisure.

Geography

1 Google Publisher Tag is leading in most countries, including United States, Japan, Taiwan, United Kingdom and 135 other countries.

2 Taboola is leading in France, Russia, Italy, Israel and 23 other countries.