Here is a nice overview of the web server usage statistics from the April 2007 Netcraft survey: http://www.serverwatch.com/stats/article.php/3670036.
Server |
No. of Sites |
Market Share |
No. of Sites With .com domains |
Apache |
66,899,485 |
58.86% |
36,803,903 |
Microsoft-IIS |
35,377,426 |
31.13% |
22,721,673 |
Unknown |
2,761,059 |
2.43% |
2,042,800 |
Sun-ONE-Web-Server |
1,663,476 |
1.46% |
1,244,246 |
lighttpd |
1,382,843 |
1.22% |
1,182,516 |
Oversee |
845,404 |
0.74% |
726,754 |
Zeus |
488,838 |
0.43% |
154,088 |
Netscape-Enterprise |
241,852 |
0.21% |
122,194 |
Rapidsite |
194,758 |
0.17% |
109,697 |
tigershark |
189,791 |
0.17% |
144,721 |
thttpd |
142,575 |
0.13% |
8,536 |
Lotus Domino |
88,250 |
0.08% |
29,840 |
AOLServer |
70,301 |
0.06% |
3,702 |
Zope |
48,556 |
0.04% |
12,337 |
WebLogic |
29,579 |
0.03% |
16,955 |
WebSTAR |
28,334 |
0.02% |
17,036 |
Stronghold |
22,465 |
0.02% |
13,751 |
Oracle-Application-Server-10g |
17,617 |
0.02% |
7,298 |
Squid |
15,950 |
0.01% |
4,674 |
4D_WebSTAR_S |
11,669 |
0.01% |
5,605 |
WebSitePro |
9,353 |
0.01% |
4,723 |
WebSite |
7,908 |
0.01% |
3,324 |
Orion |
5,745 |
0.01% |
3,738 |
Xitami |
4,602 |
0.00% |
3,248 |
Roxen WebServer |
4,430 |
0.00% |
1,373 |
Sambar |
4,260 |
0.00% |
1,765 |
Abyss |
2,864 |
0.00% |
1,309 |
Enterprise for NetWare |
1,819 |
0.00% |
489 |
Netscape FastTrack Server |
1,472 |
0.00% |
604 |
WN |
1,353 |
0.00% |
107 |
WebSphere |
1,277 |
0.00% |
658 |
JRun |
1,222 |
0.00% |
704 |
NCSA HTTPd |
910 |
0.00% |
206 |
It shows an already widely-used and gaining in popularity web server called lighttpd that is being used for static content serving in some large-scale scenarios like YouTube and Wikipedia.