What is the best alternative to IIS?

By number of websites, the most widely used alternatives to IIS are Nginx, Apache, LiteSpeed, OpenResty, Google Web Server. The right one depends on your needs; compare them on adoption, authority, and audience above.

How many alternatives to IIS are there?

Site Stats Database tracks 12 other web servers used by 100 or more websites, plus a long tail of rarer ones. IIS itself is used by 14,679 websites.

Which web server has the most websites?

Nginx leads this category with 133,349 websites in our catalog.

Where does this data come from?

Adoption is counted from Site Stats Database's own crawl; authority (Ahrefs Domain Rating) and traffic come from Ahrefs and DataForSEO. Everything reflects the sites we track and refreshes at least monthly.

IIS Alternatives & Competitors

Last updated July 1, 2026 · refreshes automatically as new data lands.

Looking for an alternative to IIS? Site Stats Database tracks 12 other web servers; the top ones are below, ranked by adoption, with authority and traffic for each and the leading sites that use them. IIS itself is used by 14,679 websites. Back to IIS.