Apache HTTP Server and Microsoft IIS (Internet Information Services) are two of the world's most popular web servers.

Comparison chart

Apache versus IIS comparison chart
Edit this comparison chartApacheIIS
  • current rating is 3.96/5
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(153 ratings)
  • current rating is 3.43/5
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(153 ratings)
Basic access authentication Yes Yes
Digest access authentication Yes Yes
HTTPS support Yes Yes
Virtual hosting Yes Yes
CGI support Yes Yes
Cost Free Bundled with Windows NT family products
FastCGI support Yes Yes
Servlets No No
SSI support Yes Yes
ASP.Net support Yes (via "mod_aspdotnet" module) Yes
Runs in user or kernel space user space kernel or user space
Administration console Yes Yes
IPv6 Yes Yes
Developed by Apache Software Foundation Microsoft Corp.
Initial Release 1995 With Windows NT 3.51
Latest Release 2.4.7 (released 2012-11-25) 8.5
Portable configuration Yes text/file Yes (Import & Export ) binary
Operating Systems supported Cross-platform (Windows, Mac OS X, Linux, BSD, Solaris, eCS, OpenVMS, AIX, z/OS) Windows
License Apache License 2.0 Proprietary
Website http://httpd.apache.org/ http://www.microsoft.com/iis

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"Apache vs IIS." Diffen.com. Diffen LLC, n.d. Web. 5 Jan 2023. < >