Ads.txt Adoption Statistics

Who's using ads.txt?

524.1K
Publishers with ads.txt
1.84K
Authorized Ad Exchanges
44.0M
Total Records
25.2%
% 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 12 hours ago
Top Sites Count Percent with ads.txt
100 30 30.0%
500 139 27.8%
1,000 252 25.2%
5,000 1,259 25.2%
10,000 2,265 22.7%
50,000 6,802 13.6%
100,000 10,362 10.4%
500,000 31,671 6.3%
1,000,000 48,554 4.9%
† Based on Majestic Million sites
Top Ad Exchange See all ad exchanges »
#Ad ExchangePublishersMarket Coverage
1 google.com 510,552 97.41%
2 appnexus.com 298,757 57%
3 rubiconproject.com 292,169 55.74%
4 pubmatic.com 287,489 54.85%
5 openx.com 283,262 54.05%
6 indexexchange.com 278,235 53.09%
7 contextweb.com 272,246 51.94%
8 advertising.com 264,441 50.45%
9 adtech.com 258,291 49.28%
10 freewheel.tv 255,461 48.74%
Number of Authorized Ad Exchanges in the last 30 Days
Top 20 Ad Exchange By Market Share
Comments, questions or are you looking for statistics we are missing? Contact us.