IIS
1,728,662 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

LiteSpeed Web Server
1,268,137 websites

LiteSpeed Web Server offers both free and paid options

https://www.litespeedtech.com/products/litespeed-web-server

LiteSpeed web server is a light-weight server which conserves resources without sacrificing performance, security, compatibility, or convenience. It is capable of handling multiple concurrent clients with minimal memory consumption and CPU ...

Market Share by Top Websites

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

2 In terms of market share, LiteSpeed Web Server is clearly lagging behind, losing to IIS in all segments.

Websites Categories

1 IIS has better usage coverage in more websites categories. Including Science & Education, Computers Electronics & Technology, Finance, Law & Government and 20 other categories.

2 LiteSpeed Web Server hasn't got a lead over IIS in any websites category.

Geography

1 LiteSpeed Web Server is leading in most countries, including India, Poland, Australia, Brazil and 93 other countries.

2 IIS is leading in United States, China, United Kingdom, Italy and 64 other countries.