September 2005 Web Server Survey

In the September 2005 survey we received responses from 71,723,098 sites. The increase of 1.33 million sites from August continued the strong growth for the Internet this year, but marked a slowing from the torrid pace over the summer, with monthly gains about half of those seen in July and August.

Apache gained 703K sites and Microsoft servers added 217K sites, but share for both continued in a narrow range that has held steady for more than a year. The open source Apache web server is now poised to cross 50 million sites, probably within the next month.

Total Sites Across All Domains August 1995 - September 2005

Total Sites Across All Domains, August 1995 - September 2005

Graph of market share for top servers across all domains, August 1995 - September 2005

Top Developers
DeveloperAugust 2005PercentSeptember 2005PercentChange
Apache4889520569.464959842469.15-0.31
Microsoft1438400620.431460155320.36-0.07
Sun18647882.6518688912.61-0.04
Zeus5806750.825845980.820.00
DeveloperAugust 2005PercentSeptember 2005PercentChange
Apache2219571169.972251807869.91-0.06
Microsoft717159522.61731544922.710.10
Zeus2325510.732246190.70-0.03
Sun2237070.712161650.67-0.04
Totals for Active Servers Across All Domains
June 2000 - September 2005


Sun is the sum of sites running SunONE, 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.