You are viewing an outdated report.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) 17,723,261 hostnames, but only 2,480,006 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	October 2004 Count	October 2004 %	September 2004 Count	September 2004 %	Growth %
Apache	1,352,114	54.52	1,329,683	54.32	0.38
Microsoft-IIS	826,071	33.31	818,037	33.42	-0.32
Rapidsite	73,299	2.96	75,900	3.10	-4.67
null	64,543	2.60	61,619	2.52	3.40
Netscape-Enterprise	23,795	0.96	24,307	0.99	-3.37
Lotus-Domino	15,726	0.63	15,684	0.64	-1.02
Apache-AdvancedExtranetServer	10,014	0.40	9,778	0.40	1.10
A	9,293	0.37	9,105	0.37	0.75
Zeus	5,637	0.23	5,589	0.23	-0.44
IdeaWebServer	5,041	0.20	4,836	0.20	2.90
WebSTAR	4,408	0.18	4,525	0.18	-3.84
WN	4,109	0.17	4,080	0.17	-0.59
WebSitePro	3,826	0.15	4,143	0.17	-8.84
Ipswitch-IMail	3,420	0.14	3,406	0.14	-0.88
IBM_HTTP_SERVER	2,812	0.11	2,760	0.11	0.57
Stronghold	2,774	0.11	2,931	0.12	-6.57
Zope	2,628	0.11	2,579	0.11	0.59
WebSite	2,611	0.11	2,597	0.11	-0.76
NetWare-Enterprise-Web-Server	2,237	0.09	2,282	0.09	-3.23
IBM_HTTP_Server	2,096	0.08	2,087	0.09	-0.86
Sun-ONE-Web-Server	2,009	0.08	1,862	0.08	6.51
FileMakerPro	2,003	0.08	2,005	0.08	-1.39
Oracle	1,982	0.08	1,972	0.08	-0.79
Apache-Coyote	1,930	0.08	1,652	0.07	15.32
WebServer	1,610	0.06	1,420	0.06	11.92
Netscape-FastTrack	1,559	0.06	1,582	0.06	-2.72
Resin	1,519	0.06	1,461	0.06	2.63
4D_WebSTAR_S	1,376	0.06	1,363	0.06	-0.35
FirstClass	1,368	0.06	1,368	0.06	-1.29
WebLogic	1,345	0.05	1,320	0.05	0.58
IBM-HTTP-Server	1,314	0.05	1,349	0.06	-3.85
Jetty	1,108	0.04	1,099	0.04	-0.48
Oracle9iAS	1,099	0.04	1,100	0.04	-1.38
httpd+ssl	1,070	0.04	1,043	0.04	1.27
squid	1,053	0.04	1,079	0.04	-3.67
NCSA	955	0.04	991	0.04	-4.87
WDaemon	893	0.04	860	0.04	2.50
Cougar	881	0.04	837	0.03	3.90
AppleShareIP	853	0.03	877	0.04	-3.99
thttpd	833	0.03	823	0.03	-0.09
Boa	799	0.03	796	0.03	-0.92
SAMBAR	795	0.03	789	0.03	-0.54
CommuniGatePro	775	0.03	762	0.03	0.40
AnWeb	733	0.03	683	0.03	5.94
AOLserver	706	0.03	711	0.03	-1.98
WWW	663	0.03	649	0.03	0.84
Orion	612	0.02	614	0.03	-1.61
Xitami	599	0.02	588	0.02	0.56
IceWarp	577	0.02	560	0.02	1.71
Lasso	570	0.02	565	0.02	-0.41
Roxen	506	0.02	510	0.02	-2.06
OSU	499	0.02	499	0.02	-1.29
4D_WebStar_D	451	0.02	439	0.02	1.41
Web	450	0.02	437	0.02	1.65
HPWB	446	0.02	474	0.02	-7.12
Roxen·Challenger	435	0.02	443	0.02	-3.07
Oracle_Web_Listener	403	0.02	411	0.02	-3.21
CERN	398	0.02	397	0.02	-1.04
Oracle-Application-Server-10g	394	0.02	332	0.01	17.15
Squid	388	0.02	385	0.02	-0.52
oXeo	378	0.02	315	0.01	18.46
EZproxy	370	0.01	360	0.01	1.45
Statistics	362	0.01	377	0.02	-5.21
WebSphere	344	0.01	313	0.01	8.49
cpsrvd	339	0.01	321	0.01	4.25
Ultraseek	328	0.01	311	0.01	4.11
NetCache	288	0.01	272	0.01	4.52
MACOS_Personal_Websharing	277	0.01	285	0.01	-4.06
Netscape-Communications	272	0.01	302	0.01	-11.09
Apache-NeoNova	261	0.01	255	0.01	1.04
DeleGate	260	0.01	257	0.01	-0.14
Tcl-Webserver	258	0.01	252	0.01	1.06
Domino-Go-Webserver	253	0.01	257	0.01	-2.82
AkamaiGHost	252	0.01	193	0.01	28.89
OpenSA	251	0.01	262	0.01	-5.43
Novell-HTTP-Server	251	0.01	269	0.01	-7.89
Inktomi	239	0.01	249	0.01	-5.25
WebtoB	216	0.01	206	0.01	3.50
UserLand	216	0.01	223	0.01	-4.39
Red	213	0.01	213	0.01	-1.29
MHttpd	212	0.01	210	0.01	-0.35
Powered	204	0.01	194	0.01	3.80
Abyss	202	0.01	175	0.01	13.94
JRun	184	0.01	173	0.01	4.99
Web_Server_4D	178	0.01	177	0.01	-0.73
Jeus	176	0.01	168	0.01	3.41
Internet	162	0.01	158	0.01	1.21
Caudium	162	0.01	156	0.01	2.51
Worldgroup	158	0.01	157	0.01	-0.66
MacHTTP	157	0.01	157	0.01	-1.29
OmniHTTPd	156	0.01	164	0.01	-6.10
Purveyor	154	0.01	148	0.01	2.71
IBM	154	0.01	156	0.01	-2.55
WindWeb	150	0.01	142	0.01	4.27
Tomcat	147	0.01	148	0.01	-1.95
httpd	145	0.01	0	0.00	N/A
QuidProQuo	144	0.01	142	0.01	0.10
Wapapi	143	0.01	146	0.01	-3.32
Fujitsu-InfoProvider-Pro	143	0.01	0	0.00	N/A
JavaWebServer	139	0.01	149	0.01	-7.91

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.