You are viewing an outdated report.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) 16,236,196 hostnames, but only 2,692,885 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	November 2005 Count	November 2005 %	October 2005 Count	October 2005 %	Growth %
Apache	1,500,599	55.72	1,487,062	55.63	0.18
Microsoft-IIS	850,905	31.60	848,784	31.75	-0.48
null	100,004	3.71	96,908	3.63	2.44
Rapidsite	68,669	2.55	68,913	2.58	-1.08
Netscape-Enterprise	18,101	0.67	18,523	0.69	-2.99
Lotus-Domino	15,071	0.56	15,164	0.57	-1.34
A	10,888	0.40	10,715	0.40	0.87
Apache-AdvancedExtranetServer	9,583	0.36	9,761	0.37	-2.54
Apache-Coyote	8,187	0.30	7,780	0.29	4.47
IdeaWebServer	6,489	0.24	6,275	0.23	2.66
Zeus	5,326	0.20	5,366	0.20	-1.47
Ipswitch-IMail	3,462	0.13	3,469	0.13	-0.93
Sun-ONE-Web-Server	3,376	0.13	3,307	0.12	1.34
Zope	3,293	0.12	3,231	0.12	1.18
WebSTAR	3,108	0.12	3,184	0.12	-3.10
WN	3,058	0.11	3,149	0.12	-3.60
IBM_HTTP_SERVER	2,926	0.11	2,944	0.11	-1.33
WebSitePro	2,557	0.09	2,657	0.10	-4.46
IBM_HTTP_Server	2,552	0.09	2,451	0.09	3.36
WebServer	2,332	0.09	2,314	0.09	0.04
Resin	2,221	0.08	2,176	0.08	1.32
NOYB	2,095	0.08	1,839	0.07	13.09
WebSite	2,069	0.08	2,066	0.08	-0.58
Oracle	1,878	0.07	1,884	0.07	-1.04
FileMakerPro	1,718	0.06	1,780	0.07	-4.19
squid	1,611	0.06	1,564	0.06	2.26
Stronghold	1,565	0.06	1,628	0.06	-4.57
4D_WebSTAR_S	1,466	0.05	1,449	0.05	0.44
FirstClass	1,382	0.05	1,375	0.05	-0.22
NetWare-Enterprise-Web-Server	1,358	0.05	1,395	0.05	-3.36
Jetty	1,335	0.05	1,315	0.05	0.78
Oracle-Application-Server-10g	1,331	0.05	1,233	0.05	7.16
nginx	1,316	0.05	1,231	0.05	6.13
WebLogic	1,235	0.05	1,217	0.05	0.74
lighttpd	1,149	0.04	634	0.02	79.91
Cougar	1,139	0.04	1,130	0.04	0.06
WDaemon	1,080	0.04	1,035	0.04	3.59
Netscape-FastTrack	1,016	0.04	1,064	0.04	-5.21
httpd+ssl	994	0.04	1,037	0.04	-4.84
Boa	993	0.04	1,002	0.04	-1.62
IceWarp	990	0.04	996	0.04	-1.33
thttpd	980	0.04	978	0.04	-0.52
Oracle9iAS	937	0.03	974	0.04	-4.50
III	919	0.03	907	0.03	0.59
CommuniGatePro	872	0.03	853	0.03	1.48
IBM-HTTP-Server	848	0.03	928	0.03	-9.29
AnWeb	812	0.03	831	0.03	-3.00
AOLserver	727	0.03	739	0.03	-2.34
Web	709	0.03	710	0.03	-0.87
SAMBAR	672	0.02	688	0.03	-3.04
NCSA	644	0.02	669	0.03	-4.44
Orion	549	0.02	560	0.02	-2.68
AppleShareIP	548	0.02	570	0.02	-4.56
EZproxy	532	0.02	512	0.02	3.15
redir-httpd	504	0.02	496	0.02	0.87
WebSphere	497	0.02	524	0.02	-5.84
Xitami	491	0.02	497	0.02	-1.93
DeleGate	491	0.02	478	0.02	1.97
4D_WebStar_D	489	0.02	473	0.02	2.63
cpsrvd	459	0.02	432	0.02	5.48
Roxen	445	0.02	438	0.02	0.86
NetCache	433	0.02	416	0.02	3.33
AkamaiGHost	418	0.02	402	0.02	3.22
OSU	416	0.02	433	0.02	-4.63
Simple,	415	0.02	410	0.02	0.48
Ultraseek	377	0.01	375	0.01	-0.20
WebtoB	374	0.01	369	0.01	0.62
HPWB	337	0.01	340	0.01	-1.60
GWS	314	0.01	290	0.01	7.49
UserLand	298	0.01	405	0.02	-26.96
Apache-NeoNova	289	0.01	288	0.01	-0.38
Abyss	280	0.01	277	0.01	0.35
Squid	272	0.01	281	0.01	-3.91
Roxen·Challenger	266	0.01	268	0.01	-1.47
Blocked	263	0.01	260	0.01	0.42
Tcl-Webserver	261	0.01	284	0.01	-8.77
Oracle_Web_Listener	258	0.01	263	0.01	-2.62
CERN	231	0.01	237	0.01	-3.24
OpenSA	226	0.01	223	0.01	0.61
Statistics	217	0.01	220	0.01	-2.08
JRun	209	0.01	210	0.01	-1.20
eSoft	207	0.01	209	0.01	-1.68
Powered	204	0.01	213	0.01	-4.92
kucci	202	0.01	196	0.01	2.31
Webserver	200	0.01	208	0.01	-4.55
PowerSchool	189	0.01	0	0.00	N/A
Polaris	183	0.01	167	0.01	8.78
Domino-Go-Webserver	183	0.01	195	0.01	-6.84
Caudium	180	0.01	185	0.01	-3.41
BIG-IP	180	0.01	0	0.00	N/A
Indy	170	0.01	158	0.01	6.81
IBM	169	0.01	170	0.01	-1.31
Red	168	0.01	170	0.01	-1.90
Inktomi	167	0.01	168	0.01	-1.32
Lasso	164	0.01	174	0.01	-6.43
httpd	162	0.01	162	0.01	-0.73
Netscape-Communications	161	0.01	164	0.01	-2.54
Jeus	160	0.01	162	0.01	-1.95
Web_Server_4D	158	0.01	155	0.01	1.19
Internet	158	0.01	155	0.01	1.19

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.