You are viewing an outdated report. The latest version of this report was published on April 1st, 2025

Web server surveys have been around for a long time. One of the problems with running a survey is how to produce meaningful results given the number of choices with the collection and reporting methodologies. Some examples:

• How does one treat wildcarded DNS sites that generate unlimited number of unique hostnames, all residing on the same system?
• How does one treat taste-testing web sites that do not have any unique content on them at all?
• If very large number of web sites reside on a single IP address, is it a a case of search engine spamming, a large number of low traffic web sites on a single platform, or a web hosting facility using load-redirection for a large number of legitimate web sites?
• How "greedy" or aggressive should the hunt for new web sites be?

All of the above are issues that our conventional web server survey deals with. The biggest issue that comes up time and again, however, is the fact that our conventional survey counts unique hostnames, not unique installations. This can seriously impact market share statistics. Case in point: the data set used both web server survey reports contains (for the last month's data set) 15,609,042 hostnames, but only 2,641,099 distinct IP addresses.

This particular report addresses this in part by counting unique IP addresses in an attempt at answering the question of how many installations of a particular server might exist. By using the IP address as a proxy for the physical hardware on which a server is running, we still need to be aware that it is not a perfect 1 to 1 mapping:

• A load balanced network of servers might share a single public facing IP address, and be undercounted.
• A single server may have multiple public IP addresses bound to one or more network cards on the system, and thus still be counted more than once.

While not a perfect solution, we feel that counting web servers by IP will give a much closer view of the number of server installs for a given technology.

Click any server to see detailed graphs and histories.

Server	September 2005 Count	September 2005 %	August 2005 Count	August 2005 %	Growth %
Apache	1,467,607	55.57	1,456,018	55.54	0.05
Microsoft-IIS	841,706	31.87	838,038	31.97	-0.31
null	93,390	3.54	90,318	3.45	2.64
Rapidsite	68,825	2.61	68,804	2.62	-0.71
Netscape-Enterprise	19,204	0.73	19,634	0.75	-2.91
Lotus-Domino	15,185	0.57	15,165	0.58	-0.61
A	10,559	0.40	10,472	0.40	0.08
Apache-AdvancedExtranetServer	9,783	0.37	9,845	0.38	-1.36
Apache-Coyote	7,138	0.27	6,684	0.25	6.00
IdeaWebServer	6,066	0.23	5,934	0.23	1.47
Zeus	5,388	0.20	5,399	0.21	-0.94
Ipswitch-IMail	3,403	0.13	3,396	0.13	-0.54
WN	3,252	0.12	3,309	0.13	-2.45
WebSTAR	3,235	0.12	3,339	0.13	-3.83
Sun-ONE-Web-Server	3,220	0.12	3,140	0.12	1.79
Zope	3,140	0.12	3,101	0.12	0.51
IBM_HTTP_SERVER	2,969	0.11	2,990	0.11	-1.44
WebSitePro	2,816	0.11	2,766	0.11	1.05
IBM_HTTP_Server	2,377	0.09	2,282	0.09	3.39
WebServer	2,243	0.08	2,211	0.08	0.70
Resin	2,074	0.08	2,000	0.08	2.93
WebSite	2,068	0.08	2,095	0.08	-2.02
Oracle	1,917	0.07	1,916	0.07	-0.69
FileMakerPro	1,732	0.07	1,749	0.07	-1.70
Stronghold	1,686	0.06	1,780	0.07	-5.98
squid	1,534	0.06	1,466	0.06	3.86
NOYB	1,494	0.06	1,071	0.04	38.46
4D_WebSTAR_S	1,429	0.05	1,429	0.05	-0.74
NetWare-Enterprise-Web-Server	1,399	0.05	1,453	0.06	-4.43
FirstClass	1,382	0.05	1,353	0.05	1.39
Jetty	1,296	0.05	1,280	0.05	0.50
WebLogic	1,224	0.05	1,165	0.04	4.29
nginx	1,146	0.04	1,122	0.04	1.38
Oracle-Application-Server-10g	1,128	0.04	1,070	0.04	4.64
Cougar	1,104	0.04	1,078	0.04	1.65
Netscape-FastTrack	1,087	0.04	1,112	0.04	-2.97
httpd+ssl	1,064	0.04	1,077	0.04	-1.94
WDaemon	1,019	0.04	1,014	0.04	-0.25
Oracle9iAS	995	0.04	1,004	0.04	-1.63
Boa	990	0.04	896	0.03	9.67
IceWarp	968	0.04	966	0.04	-0.53
IBM-HTTP-Server	963	0.04	992	0.04	-3.64
thttpd	920	0.03	930	0.04	-1.81
III	896	0.03	893	0.03	-0.41
CommuniGatePro	833	0.03	825	0.03	0.22
AnWeb	779	0.03	751	0.03	2.96
AOLserver	731	0.03	724	0.03	0.22
Web	711	0.03	697	0.03	1.25
NCSA	708	0.03	707	0.03	-0.60
SAMBAR	688	0.03	687	0.03	-0.60
AppleShareIP	582	0.02	598	0.02	-3.40
Orion	557	0.02	554	0.02	-0.20
WebSphere	537	0.02	530	0.02	0.57
lighttpd	499	0.02	422	0.02	17.37
EZproxy	499	0.02	490	0.02	1.08
DeleGate	496	0.02	491	0.02	0.27
redir-httpd	488	0.02	500	0.02	-3.12
Xitami	476	0.02	479	0.02	-1.36
4D_WebStar_D	475	0.02	456	0.02	3.40
OSU	441	0.02	439	0.02	-0.29
Roxen	440	0.02	446	0.02	-2.08
cpsrvd	429	0.02	424	0.02	0.43
Simple,	417	0.02	450	0.02	-8.02
NetCache	392	0.01	392	0.01	-0.74
Ultraseek	361	0.01	359	0.01	-0.19
WebtoB	354	0.01	349	0.01	0.68
HPWB	353	0.01	364	0.01	-3.74
AkamaiGHost	343	0.01	348	0.01	-2.17
Roxen·Challenger	300	0.01	315	0.01	-5.47
Squid	286	0.01	319	0.01	-11.01
Apache-NeoNova	282	0.01	286	0.01	-2.13
Tcl-Webserver	280	0.01	296	0.01	-6.11
Oracle_Web_Listener	275	0.01	284	0.01	-3.89
GWS	262	0.01	245	0.01	6.15
Blocked	255	0.01	242	0.01	4.59
CERN	239	0.01	251	0.01	-5.49
Abyss	235	0.01	241	0.01	-3.21
Statistics	221	0.01	228	0.01	-3.79
OpenSA	221	0.01	232	0.01	-5.45
JRun	210	0.01	214	0.01	-2.60
Powered	208	0.01	211	0.01	-2.15
kucci	200	0.01	197	0.01	0.77
eSoft	199	0.01	202	0.01	-2.21
UserLand	198	0.01	201	0.01	-2.22
Webserver	192	0.01	194	0.01	-1.76
Domino-Go-Webserver	190	0.01	196	0.01	-3.78
oXeo	184	0.01	222	0.01	-17.73
Inktomi	178	0.01	183	0.01	-3.45
Lasso	174	0.01	180	0.01	-4.05
Netscape-Communications	172	0.01	179	0.01	-4.62
Red	171	0.01	178	0.01	-4.64
IBM	171	0.01	172	0.01	-1.32
Caudium	171	0.01	167	0.01	1.64
Internet	165	0.01	162	0.01	1.10
Indy	162	0.01	158	0.01	1.77
Polaris	160	0.01	151	0.01	5.18
httpd	159	0.01	156	0.01	1.17
Jeus	157	0.01	150	0.01	3.89
Web_Server_4D	151	0.01	157	0.01	-4.53
OmniHTTPd	149	0.01	153	0.01	-3.33

Note: Readers are cautioned that the Growth percentages are based on a server's market share penetration rather than the absolute number of servers we detected. Thus, it is possible for the number of servers to increase, while the growth is actually a negative value.