You are viewing an outdated report. The latest version of this report was published on June 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) 16,649,913 hostnames, but only 2,448,080 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 2004 Count	September 2004 %	August 2004 Count	August 2004 %	Growth %
Apache	1,329,683	54.32	1,316,561	54.19	0.23
Microsoft-IIS	818,037	33.42	814,904	33.54	-0.38
Rapidsite	75,900	3.10	76,117	3.13	-1.04
null	61,619	2.52	59,295	2.44	3.13
Netscape-Enterprise	24,307	0.99	24,877	1.02	-3.03
Lotus-Domino	15,684	0.64	15,624	0.64	-0.38
Apache-AdvancedExtranetServer	9,778	0.40	9,692	0.40	0.12
A	9,105	0.37	8,974	0.37	0.69
Zeus	5,589	0.23	5,679	0.23	-2.33
IdeaWebServer	4,836	0.20	4,783	0.20	0.34
WebSTAR	4,525	0.18	4,676	0.19	-3.96
WebSitePro	4,143	0.17	4,255	0.18	-3.37
WN	4,080	0.17	4,055	0.17	-0.15
Ipswitch-IMail	3,406	0.14	3,393	0.14	-0.38
Stronghold	2,931	0.12	3,068	0.13	-5.19
IBM_HTTP_SERVER	2,760	0.11	2,667	0.11	2.70
WebSite	2,597	0.11	2,757	0.11	-6.52
Zope	2,579	0.11	2,512	0.10	1.89
NetWare-Enterprise-Web-Server	2,282	0.09	2,344	0.10	-3.38
IBM_HTTP_Server	2,087	0.09	2,070	0.09	0.06
FileMakerPro	2,005	0.08	1,996	0.08	-0.31
Oracle	1,972	0.08	1,974	0.08	-0.86
Sun-ONE-Web-Server	1,862	0.08	1,746	0.07	5.83
Apache-Coyote	1,652	0.07	1,438	0.06	14.01
Netscape-FastTrack	1,582	0.06	1,629	0.07	-3.62
Resin	1,461	0.06	1,420	0.06	2.11
WebServer	1,420	0.06	1,425	0.06	-1.11
FirstClass	1,368	0.06	1,349	0.06	0.64
4D_WebSTAR_S	1,363	0.06	1,313	0.05	3.02
IBM-HTTP-Server	1,349	0.06	1,379	0.06	-2.92
WebLogic	1,320	0.05	1,315	0.05	-0.38
Oracle9iAS	1,100	0.04	1,081	0.04	0.99
Jetty	1,099	0.04	1,065	0.04	2.41
squid	1,079	0.04	1,043	0.04	2.67
httpd+ssl	1,043	0.04	1,030	0.04	0.49
NCSA	991	0.04	996	0.04	-1.26
AppleShareIP	877	0.04	908	0.04	-4.15
WDaemon	860	0.04	867	0.04	-1.56
Cougar	837	0.03	828	0.03	0.32
thttpd	823	0.03	826	0.03	-1.12
Boa	796	0.03	660	0.03	19.69
SAMBAR	789	0.03	790	0.03	-0.88
CommuniGatePro	762	0.03	756	0.03	0.03
AOLserver	711	0.03	703	0.03	0.37
AnWeb	683	0.03	682	0.03	-0.61
WWW	649	0.03	644	0.03	0.01
Orion	614	0.03	604	0.02	0.88
Xitami	588	0.02	593	0.02	-1.60
Lasso	565	0.02	574	0.02	-2.32
IceWarp	560	0.02	533	0.02	4.27
Roxen	510	0.02	505	0.02	0.22
OSU	499	0.02	503	0.02	-1.55
HPWB	474	0.02	493	0.02	-4.58
Roxen·Challenger	443	0.02	454	0.02	-3.16
4D_WebStar_D	439	0.02	437	0.02	-0.31
Web	437	0.02	433	0.02	0.16
Oracle_Web_Listener	411	0.02	406	0.02	0.46
CERN	397	0.02	408	0.02	-3.43
Squid	385	0.02	384	0.02	-0.50
Statistics	377	0.02	380	0.02	-1.54
EZproxy	360	0.01	354	0.01	0.92
Oracle-Application-Server-10g	332	0.01	279	0.01	18.09
cpsrvd	321	0.01	293	0.01	8.72
oXeo	315	0.01	314	0.01	-0.44
WebSphere	313	0.01	289	0.01	7.48
Ultraseek	311	0.01	300	0.01	2.88
Netscape-Communications	302	0.01	310	0.01	-3.32
MACOS_Personal_Websharing	285	0.01	303	0.01	-6.65
NetCache	272	0.01	244	0.01	10.63
Novell-HTTP-Server	269	0.01	271	0.01	-1.49
OpenSA	262	0.01	251	0.01	3.59
Domino-Go-Webserver	257	0.01	268	0.01	-4.83
DeleGate	257	0.01	256	0.01	-0.37
Apache-NeoNova	255	0.01	248	0.01	2.04
Tcl-Webserver	252	0.01	242	0.01	3.34
Inktomi	249	0.01	255	0.01	-3.09
UserLand	223	0.01	223	0.01	-0.76
Red	213	0.01	214	0.01	-1.22
MHttpd	210	0.01	212	0.01	-1.70
WebtoB	206	0.01	197	0.01	3.77
Powered	194	0.01	198	0.01	-2.76
AkamaiGHost	193	0.01	223	0.01	-14.11
Web_Server_4D	177	0.01	179	0.01	-1.87
Abyss	175	0.01	191	0.01	-9.07
JRun	173	0.01	174	0.01	-1.33
Jeus	168	0.01	163	0.01	2.28
OmniHTTPd	164	0.01	165	0.01	-1.36
Internet	158	0.01	170	0.01	-7.76
Worldgroup	157	0.01	159	0.01	-2.01
MacHTTP	157	0.01	164	0.01	-5.00
IBM	156	0.01	156	0.01	-0.76
Caudium	156	0.01	149	0.01	3.90
JavaWebServer	149	0.01	151	0.01	-2.07
Tomcat	148	0.01	149	0.01	-1.43
Purveyor	148	0.01	153	0.01	-4.00
Wapapi	146	0.01	136	0.01	6.54
NaviServer	143	0.01	142	0.01	-0.06
WindWeb	142	0.01	0	0.00	N/A
QuidProQuo	142	0.01	138	0.01	2.12
publicfile	140	0.01	140	0.01	-0.76

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.