September 2001 Netcraft Survey Highlights
The Netcraft Web Server Survey is a survey of Web Server software usage on the Internet. Netcraft received responses to its September 2001 survey from 32,398,046 sites.
| September Results (of servers with more than 5,000 sites) | |||
| Server | No. of Servers in Use |
Market Share | No. of Servers With .com domains |
| Apache | 19,279,109 | 59.51% | 9,175,986 |
| Microsoft-IIS | 8,894,368 | 27.45% | 5,771,102 |
| Netscape-Enterprise | 1,292,863 | 3.99% | 822,011 |
| Zeus | 783,261 | 2.42% | 432,602 |
| Rapidsite | 402,404 | 1.24% | 280,715 |
| thttpd | 312,178 | 0.96% | 1,011 |
| WebSitePro | 108,846 | 0.34% | 69,656 |
| WebSTAR | 97,289 | 0.30% | 55,602 |
| Stronghold | 79,173 | 0.24% | 53,366 |
| Lotus Domino | 52,171 | 0.16% | 22,701 |
| Sambar | 16,136 | 0.05% | 2,325 |
| Netscape FastTrack Server | 14,637 | 0.05% | 7,688 |
| Roxen | 8,794 | 0.03% | 3,701 |
| NCSA HTTPd | 5,827 | 0.02% | 2,162 |
| Enterprise for NetWare | 5,413 | 0.02% | 1,842 |
| Xitami | 4,474 | 0.01% | 3,002 |
| Orion | 3,071 | 0.01% | 2,314 |
| OmniHTTPd Pro | 2,331 | 0.01% | 955 |
| AOLServer | 1,536 | 0.00% | 968 |
| WebSite Standard | 1,535 | 0.00% | 847 |
| Personal Web Server | 367 | 0.00% | 193 |
| webserver-simplewww.html | 237 | 0.00% | 180 |
| Savant | 217 | 0.00% | 131 |
| Alibaba | 103 | 0.00% | 0 |
| ZBServer | 61 | 0.00% | 36 |
| vqServer | 45 | 0.00% | 24 |
| Jigsaw | 29 | 0.00% | 13 |
| iPlanet Ent. Edition | 28 | 0.00% | 12 |
| Tcl Web Server | 27 | 0.00% | 17 |
| GoAhead | 12 | 0.00% | 0 |
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