Ads.txt Adoption Statistics

Who's using ads.txt?

525.7K
Publishers with ads.txt
1.77K
Authorized Ad Exchanges
43.6M
Total Records
25.9%
% of top 5k domains with ads.txt

These 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. 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
Percentage of Top Sites with ads.txt Updated 6 hours ago
Top Sites Count Percent with ads.txt
100 33 33.0%
500 137 27.4%
1,000 261 26.1%
5,000 1,297 25.9%
10,000 2,297 23.0%
50,000 7,385 14.8%
100,000 10,241 10.2%
500,000 31,038 6.2%
1,000,000 47,945 4.8%
† Based on Majestic Million sites
Top Ad Exchange See all ad exchanges »
#Ad ExchangePublishersMarket Coverage
1 google.com 511,148 97.23%
2 appnexus.com 306,615 58.32%
3 rubiconproject.com 299,579 56.98%
4 pubmatic.com 295,140 56.14%
5 openx.com 290,001 55.16%
6 indexexchange.com 285,167 54.24%
7 contextweb.com 279,139 53.1%
8 advertising.com 271,650 51.67%
9 adtech.com 263,429 50.11%
10 freewheel.tv 261,753 49.79%
Number of Authorized Ad Exchanges in the last 30 Days
Top 20 Ad Exchange By Market Share
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