Netcraft received responses to its October 2003 survey from 43,700,759 sites. This is 556,385 (about 1.3%) more sites than responded in September, and it represents a new peak in the number of responses received.
| October Results | |||
| Server | No. of Servers in Use |
Market Share | No. of Servers With .com domains |
| Apache | 28,235,972 | 64.61% | 12,553,067 |
| Microsoft-IIS | 10,251,874 | 23.46% | 5,759,964 |
| Netscape-Enterprise | 1,519,321 | 3.48% | 854,722 |
| Unknown | 809,259 | 1.85% | 452,642 |
| Zeus | 735,179 | 1.68% | 372,202 |
| Rapidsite | 405,883 | 0.93% | 269,641 |
| tigershark | 252,669 | 0.58% | 182,755 |
| thttpd | 222,385 | 0.51% | 2,983 |
| Lotus Domino | 85,636 | 0.20% | 30,019 |
| WebSTAR | 75,442 | 0.17% | 42,655 |
| Stronghold | 38,535 | 0.09% | 22,405 |
| WebSitePro | 38,173 | 0.09% | 20,196 |
| WebSite | 26,756 | 0.06% | 15,175 |
| Zope | 23,164 | 0.05% | 5,243 |
| WN | 15,814 | 0.04% | 2,514 |
| 4D_WebSTAR_S | 11,172 | 0.03% | 5,590 |
| AOLServer | 10,630 | 0.02% | 7,003 |
| Roxen WebServer | 8,921 | 0.02% | 4,822 |
| WebLogic | 7,662 | 0.02% | 5,122 |
| Enterprise for NetWare | 7,441 | 0.02% | 2,138 |
| Netscape FastTrack Server | 6,769 | 0.02% | 2,665 |
| Orion | 6,501 | 0.01% | 4,019 |
| Sambar | 5,935 | 0.01% | 2,286 |
| Xitami | 4,499 | 0.01% | 2,295 |
| OmniHTTPd Pro | 3,693 | 0.01% | 927 |
| NCSA HTTPd | 3,083 | 0.01% | 750 |