Ads.txt Adoption Statistics

Who's using ads.txt?

820.7K
Publishers with ads.txt
2.08K
Authorized Ad Exchanges
54.4M
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 1 hour ago
Top Sites Count Percent with ads.txt
100 28 28.0%
500 136 27.2%
1,000 261 26.1%
5,000 1,295 25.9%
10,000 2,359 23.6%
50,000 8,123 16.2%
100,000 13,097 13.1%
500,000 43,975 8.8%
1,000,000 70,271 7.0%
† Based on Majestic Million sites
Top Ad Exchange See all ad exchanges »
#Ad ExchangePublishersMarket Coverage
1 google.com 807,443 98.39%
2 appnexus.com 296,857 36.17%
3 rubiconproject.com 291,261 35.49%
4 pubmatic.com 287,917 35.08%
5 openx.com 283,160 34.5%
6 indexexchange.com 277,793 33.85%
7 contextweb.com 271,105 33.03%
8 advertising.com 264,724 32.26%
9 adtech.com 256,497 31.25%
10 freewheel.tv 254,221 30.98%
Number of Authorized Ad Exchanges in the last 30 Days
Top 20 Ad Exchange By Market Share
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