Apache
6,301,578 websites

Apache is free to use

http://httpd.apache.org

The Apache HTTP Server is an open-source HTTP server for modern operating systems including UNIX, Microsoft Windows, Mac OS/X and Netware. The goal of this project is to provide a secure, efficient and extensible server that provides HTTP s...

VS

Citrix NetScaler
43,573 websites

Citrix NetScaler offers both free and paid options

http://www.citrix.com/products/netscaler-application-delivery-controller/overview.html

Citrix NetScaler is an all-in-one web application delivery controller that makes applications run five times better, reduces web application ownership costs, and makes sure that applications are always available. It is deployed in thousand...

Market Share by Top Websites

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

2 In terms of market share, Citrix NetScaler is clearly lagging behind, losing to Apache in all segments.

Websites Categories

1 Apache has better usage coverage in more websites categories. Including Science & Education, Computers Electronics & Technology, Arts & Entertainment, Health and 20 other categories.

2 Citrix NetScaler hasn't got a lead over Apache in any websites category.

Geography

1 Apache is leading in most countries, including United States, Germany, Japan, France and 162 other countries.

2 Citrix NetScaler hasn't got a lead over Apache in any country.