Ads.txt Adoption Statistics

Who's using ads.txt?

876.3K
Publishers with ads.txt
2.17K
Authorized Ad Exchanges
57.3M
Total Records
27.2%
% 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 3 months ago
Top Sites Count Percent with ads.txt
100 27 27.0%
500 141 28.2%
1,000 272 27.2%
5,000 1,358 27.2%
10,000 2,421 24.2%
50,000 8,491 17.0%
100,000 13,648 13.6%
500,000 46,757 9.4%
1,000,000 71,781 7.2%
† Based on Majestic Million sites
Top Ad Exchange See all ad exchanges »
#Ad ExchangePublishersMarket Coverage
1 google.com 863,572 98.55%
2 appnexus.com 299,298 34.15%
3 rubiconproject.com 294,620 33.62%
4 pubmatic.com 291,290 33.24%
5 openx.com 286,753 32.72%
6 indexexchange.com 281,160 32.08%
7 contextweb.com 273,144 31.17%
8 advertising.com 268,102 30.59%
9 adtech.com 259,235 29.58%
10 freewheel.tv 256,629 29.28%
Number of Authorized Ad Exchanges in the last 30 Days
Top 20 Ad Exchange By Market Share
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