Ads Txt
2,725,030 websites

Ads Txt is free to use

https://iabtechlab.com/ads-txt/

Ads.txt stands for Authorized Digital Sellers and is a simple, flexible and secure method that publishers and distributors can use to publicly declare the companies they authorize to sell their digital inventory.

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PubMatic
2,250,358 websites

PubMatic is free to use

http://www.pubmatic.com

Since 2006, PubMatic (www.PubMatic.com) has been at the forefront of developing innovative technology to help publishers automate the process of evaluating and selling their advertising inventory. PubMatic gives premium publishers a real-ti...

Market Share by Top Websites

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

2 In terms of market share, PubMatic is clearly lagging behind, losing to Ads Txt in all segments.

Websites Categories

1 Ads Txt has better usage coverage in more websites categories. Including Computers Electronics & Technology, Arts & Entertainment, Games, News & Media and 18 other categories.

2 PubMatic is leading in Science & Education and Community & Society.

Geography

1 Ads Txt is leading in most countries, including United States, Japan, Russia, India and 160 other countries.

2 PubMatic is leading in China and Iceland.