Ads.txt Adoption Statistics

Who's using ads.txt?

Below are summary statistics on publisher adoption of the ads.txt standard. The first graph shows how many publishers we have crawled that have valid ads.txt files with records.

Below that are statistics about the ad publishers listed on each ads.txt file across the web. Of course you can download the complete adstxt aggregate file and crunch the data yourself.

We do not have all ads.txt files indexed yet. Please submit domains we are missing.

Publisher Domains with Valid Ads.txt in the last 30 Days

Publisher Domains with Valid Ads.txt in the last 12 months

Top 100 Ad Exchange

View all ad exchanges or download the data for this chart here.

Top 10 Ad Exchange

#Ad ExchangePublishersMarket Coverage
1 google.com 194,213 97.97%
2 appnexus.com 116,640 58.84%
3 rubiconproject.com 115,159 58.09%
4 pubmatic.com 112,769 56.89%
5 openx.com 110,414 55.7%
6 indexexchange.com 107,086 54.02%
7 contextweb.com 98,719 49.8%
8 advertising.com 98,220 49.55%
9 adtech.com 92,889 46.86%
10 freewheel.tv 91,642 46.23%

Number of Authorized Ad Exchanges in the last 30 Days