IIS
trend
1,729,053 websites

IIS offers both free and paid options

http://www.iis.net

A flexible & easy-to-manage web server... Internet Information Services (IIS) for Windows® Server is a flexible, secure and manageable Web server for hosting anything on the Web. From media streaming to web applications, IIS's scalable a...

VS

Varnish
trend
1,294,120 websites

Varnish is free to use

https://www.varnish-cache.org/

Varnish is an HTTP accelerator designed for content-heavy dynamic web sites. In contrast to other web accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was...

Market Share by Top Websites

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

2 Varnish is leading in Top 10K Sites.

Websites Categories

1 IIS has better usage coverage in more websites categories. Including Science & Education, Computers Electronics & Technology, Law & Government, Finance and 16 other categories.

2 Varnish is leading in Arts & Entertainment, Food & Drink, Games and Hobbies & Leisure.

Geography

1 IIS is leading in most countries, including United States, China, United Kingdom, Italy and 122 other countries.

2 Varnish is leading in Japan, France, Germany, Canada and 35 other countries.