Ad-sys
10 websites

Ad-sys costs money

http://www.ad-sys.com/

Ad-Sys is a top open source, easy-to-use, real-time advertising platform, accommodating the needs of all in the advertising industry

VS

Amazon Publisher Services
715,190 websites

Amazon Publisher Services offers both free and paid options

https://aps.amazon.com/

Amazon Publisher Services is a suite of cloud services that brings solutions built by Amazon to help publishers build, monetize and grow their digital media business.

Market Share by Top Websites

1 Amazon Publisher Services is leading in Top 10K Sites, Top 100K Sites, Top 1M Sites and The Entire Web.

2 In terms of market share, Ad-sys is clearly lagging behind, losing to Amazon Publisher Services in all segments.

Websites Categories

1 Amazon Publisher Services has better usage coverage in more websites categories. Including Arts & Entertainment, Games, Computers Electronics & Technology, News & Media and 20 other categories.

2 Ad-sys hasn't got a lead over Amazon Publisher Services in any websites category.

Geography

1 Amazon Publisher Services is leading in most countries, including United States, Russia, France, Taiwan and 161 other countries.

2 Ad-sys hasn't got a lead over Amazon Publisher Services in any country.