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The Netcraft Web Server Survey

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The Netcraft Web Server Survey is a survey of Web Server software usage on Internet connected computers. We collect and collate as many hostnames providing an http service as we can find, and systematically poll each one with an HTTP request for the server name.
In the March 2001 survey we received responses from 28,611,177 sites.

Market Share for Top Servers Across All Domains August 1995 - March 2001

Top Developers

DeveloperFebruary 2001PercentMarch 2001PercentChange
Apache1687174459.991723800460.250.26
Microsoft552394319.64565063419.750.11
iPlanet17885326.3617853376.24-0.12

Top Servers

ServerFebruary 2001PercentMarch 2001PercentChange
Apache1687174459.991723800460.250.26
Microsoft-IIS552206919.63564896019.740.11
Netscape-Enterprise17511236.2317504296.12-0.11
WebLogic10396053.7010211843.57-0.13
Zeus8012152.857380682.58-0.27
Rapidsite3802171.353950941.380.03
thttpd3677241.313654451.28-0.03
AOLserver1532960.552626500.920.37
tigershark1664650.591824810.640.05
WebSitePro1146550.411417370.500.09

Active Sites

DeveloperFebruary 2001PercentMarch 2001PercentChange
Apache671631260.49674481761.130.64
Microsoft277615925.00273989324.83-0.17
iPlanet2787382.512515362.28-0.23

Totals for Active Servers Across All Domains June 2000 - March 2001


iPlanet is the sum of sites running iPlanet-Enterprise, Netscape-Enterprise, Netscape-FastTrack, Netscape-Commerce, Netscape-Communications, Netsite-Commerce & Netsite-Communications.

Microsoft is the sum of sites running Microsoft-Internet-Information-Server, Microsoft-IIS, Microsoft-IIS-W, Microsoft-PWS-95, & Microsoft-PWS.

Platform groupings are here.

Around the Net

See the April 2001 survey report for analysis covering this month.

Reports and Interactive Queries

Reports are provided showing server usage for the Internet as a whole, and for selected domains, with links to all the sites responding to the survey. A facility for you to check what server a particular site is running now is also available. The same form can be used to ensure that a particular site is included in future surveys. A directory of sites running in developer domains is also provided, while the sites discovered by the survey can be explored.

Fair Use, Copyright

Excerpts from this survey may be reproduced if Netcraft and the url http://www.netcraft.com/survey/ are attributed.

Your comments and criticism are much appreciated.


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