You are viewing an outdated report.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) 20,725,323 hostnames, but only 2,551,015 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	December 2004 Count	December 2004 %	November 2004 Count	November 2004 %	Growth %
Apache	1,401,684	54.95	1,372,298	54.69	0.47
Microsoft-IIS	839,897	32.92	831,419	33.13	-0.64
Rapidsite	73,848	2.89	73,523	2.93	-1.20
null	66,767	2.62	67,408	2.69	-2.57
Netscape-Enterprise	22,876	0.90	23,389	0.93	-3.80
Lotus-Domino	15,804	0.62	15,760	0.63	-1.36
Apache-AdvancedExtranetServer	10,250	0.40	10,205	0.41	-1.21
A	9,739	0.38	9,463	0.38	1.23
Zeus	5,661	0.22	5,636	0.22	-1.20
IdeaWebServer	5,285	0.21	5,139	0.20	1.16
WebSTAR	4,198	0.16	4,327	0.17	-4.57
Apache-Coyote	3,886	0.15	2,207	0.09	73.19
WN	3,864	0.15	3,903	0.16	-2.62
WebSitePro	3,732	0.15	3,636	0.14	0.96
Ipswitch-IMail	3,573	0.14	3,475	0.14	1.13
IBM_HTTP_SERVER	2,962	0.12	2,883	0.11	1.06
Zope	2,782	0.11	2,738	0.11	-0.06
Stronghold	2,694	0.11	2,731	0.11	-2.97
WebSite	2,626	0.10	2,561	0.10	0.86
Sun-ONE-Web-Server	2,283	0.09	2,144	0.09	4.74
IBM_HTTP_Server	2,103	0.08	2,098	0.08	-1.40
NetWare-Enterprise-Web-Server	2,065	0.08	2,147	0.09	-5.40
FileMakerPro	2,022	0.08	1,998	0.08	-0.46
Oracle	1,999	0.08	1,965	0.08	0.06
WebServer	1,860	0.07	1,743	0.07	4.96
Resin	1,766	0.07	1,553	0.06	11.85
Netscape-FastTrack	1,464	0.06	1,497	0.06	-3.81
4D_WebSTAR_S	1,429	0.06	1,381	0.06	1.78
FirstClass	1,379	0.05	1,389	0.06	-2.35
IBM-HTTP-Server	1,250	0.05	1,279	0.05	-3.87
Jetty	1,181	0.05	1,141	0.05	1.81
WebLogic	1,153	0.05	1,390	0.06	-18.41
squid	1,150	0.05	1,096	0.04	3.21
Oracle9iAS	1,116	0.04	1,114	0.04	-1.46
httpd+ssl	1,078	0.04	1,072	0.04	-1.09
WDaemon	964	0.04	922	0.04	2.84
Cougar	964	0.04	919	0.04	3.18
NCSA	933	0.04	920	0.04	-0.25
Boa	917	0.04	791	0.03	14.03
III	868	0.03	0	0.00	N/A
thttpd	858	0.03	845	0.03	-0.13
AppleShareIP	815	0.03	818	0.03	-2.00
IceWarp	813	0.03	648	0.03	23.41
CommuniGatePro	801	0.03	790	0.03	-0.27
AnWeb	798	0.03	771	0.03	1.81
SAMBAR	786	0.03	777	0.03	-0.50
Web	748	0.03	433	0.02	69.92
AOLserver	740	0.03	707	0.03	2.95
Orion	602	0.02	604	0.02	-1.96
Xitami	592	0.02	594	0.02	-1.97
Oracle-Application-Server-10g	543	0.02	463	0.02	15.36
DeleGate	501	0.02	264	0.01	86.66
Roxen	494	0.02	506	0.02	-3.97
OSU	492	0.02	502	0.02	-3.60
HPWB	466	0.02	435	0.02	5.37
Simple,	465	0.02	0	0.00	N/A
4D_WebStar_D	441	0.02	455	0.02	-4.67
oXeo	428	0.02	389	0.02	8.22
EZproxy	414	0.02	388	0.02	4.95
WebSphere	406	0.02	368	0.01	8.52
Roxen·Challenger	399	0.02	433	0.02	-9.36
Squid	387	0.02	370	0.01	2.88
CERN	366	0.01	374	0.01	-3.74
cpsrvd	364	0.01	346	0.01	3.48
Oracle_Web_Listener	359	0.01	369	0.01	-4.30
Statistics	349	0.01	363	0.01	-5.43
Powered	341	0.01	209	0.01	60.48
AkamaiGHost	334	0.01	257	0.01	27.83
Ultraseek	330	0.01	324	0.01	0.18
NetCache	320	0.01	283	0.01	11.22
WebtoB	285	0.01	233	0.01	20.31
Tcl-Webserver	281	0.01	270	0.01	2.37
Apache-NeoNova	280	0.01	277	0.01	-0.57
Domino-Go-Webserver	250	0.01	239	0.01	2.89
Netscape-Communications	249	0.01	253	0.01	-3.19
OpenSA	245	0.01	257	0.01	-6.23
Inktomi	238	0.01	238	0.01	-1.64
UserLand	221	0.01	217	0.01	0.17
Novell-HTTP-Server	214	0.01	249	0.01	-15.46
GWS	211	0.01	0	0.00	N/A
Abyss	211	0.01	216	0.01	-3.92
Red	208	0.01	207	0.01	-1.16
Lasso	201	0.01	563	0.02	-64.88
JRun	192	0.01	203	0.01	-6.97
Web_Server_4D	177	0.01	173	0.01	0.64
OmniHTTPd	166	0.01	161	0.01	1.42
httpd	165	0.01	146	0.01	11.16
SilverStream	162	0.01	0	0.00	N/A
Internet	161	0.01	163	0.01	-2.85
Caudium	159	0.01	157	0.01	-0.39
WindWeb	158	0.01	149	0.01	4.30
QuidProQuo	158	0.01	145	0.01	7.18
IBM	156	0.01	157	0.01	-2.27
HTTPD2	153	0.01	150	0.01	0.33
MacHTTP	150	0.01	151	0.01	-2.29
Indy	149	0.01	0	0.00	N/A
server*x.x.x	145	0.01	0	0.00	N/A
Worldgroup	145	0.01	157	0.01	-9.16
JavaWebServer	144	0.01	0	0.00	N/A
Fujitsu-InfoProvider-Pro	144	0.01	138	0.01	2.64

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.