You are viewing an outdated report.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) 13,430,403 hostnames, but only 2,331,238 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 2003 Count	December 2003 %	November 2003 Count	November 2003 %	Growth %
Apache	1,241,512	53.26	1,227,627	53.10	0.30
Microsoft-IIS	802,788	34.44	798,425	34.53	-0.28
Rapidsite	76,901	3.30	76,853	3.32	-0.76
null	43,303	1.86	42,167	1.82	1.85
Netscape-Enterprise	30,335	1.30	30,786	1.33	-2.28
Lotus-Domino	15,860	0.68	15,774	0.68	-0.28
Apache-AdvancedExtranetServer	8,743	0.38	8,648	0.37	0.26
A	8,068	0.35	7,922	0.34	1.00
Zeus	6,440	0.28	6,424	0.28	-0.58
WebSTAR	5,967	0.26	6,144	0.27	-3.68
WebSitePro	5,503	0.24	5,620	0.24	-2.89
WN	4,669	0.20	4,773	0.21	-2.99
IdeaWebServer	4,284	0.18	4,216	0.18	0.77
Stronghold	4,232	0.18	4,363	0.19	-3.80
Ipswitch-IMail	3,178	0.14	3,145	0.14	0.22
NetWare-Enterprise-Web-Server	3,039	0.13	3,059	0.13	-1.47
WebSite	2,905	0.12	2,886	0.12	-0.17
Netscape-FastTrack	2,160	0.09	2,231	0.10	-3.98
IBM_HTTP_SERVER	2,150	0.09	2,086	0.09	2.22
IBM_HTTP_Server	2,145	0.09	2,108	0.09	0.92
FileMakerPro	2,134	0.09	2,127	0.09	-0.50
Zope	2,043	0.09	1,965	0.08	3.11
Oracle	1,953	0.08	1,929	0.08	0.41
IBM-HTTP-Server	1,484	0.06	1,469	0.06	0.19
NCSA	1,364	0.06	1,376	0.06	-1.69
FirstClass	1,301	0.06	1,287	0.06	0.25
AppleShareIP	1,218	0.05	1,245	0.05	-2.98
WebServer	1,207	0.05	1,133	0.05	5.65
Resin	1,147	0.05	1,110	0.05	2.48
WebLogic	1,102	0.05	1,079	0.05	1.29
4D_WebSTAR_S	1,099	0.05	1,062	0.05	2.63
Oracle9iAS	907	0.04	854	0.04	5.33
SAMBAR	865	0.04	848	0.04	1.16
Jetty	848	0.04	807	0.03	4.21
httpd+ssl	804	0.03	684	0.03	16.57
WDaemon	720	0.03	694	0.03	2.89
Cougar	716	0.03	683	0.03	3.97
thttpd	692	0.03	669	0.03	2.58
Xitami	678	0.03	670	0.03	0.36
CommuniGatePro	662	0.03	661	0.03	-0.67
AOLserver	660	0.03	666	0.03	-1.72
HPWB	652	0.03	673	0.03	-3.92
AnWeb	646	0.03	624	0.03	2.67
Lasso	592	0.03	598	0.03	-1.82
Orion	589	0.03	571	0.02	2.30
Oracle_Web_Listener	587	0.03	596	0.03	-2.32
Roxen·Challenger	580	0.02	586	0.03	-1.84
Roxen	565	0.02	564	0.02	-0.65
CERN	556	0.02	569	0.02	-3.09
WWW	551	0.02	534	0.02	2.33
OSU	551	0.02	554	0.02	-1.36
Boa	550	0.02	544	0.02	0.27
squid	515	0.02	451	0.02	13.25
Netscape-Communications	469	0.02	478	0.02	-2.69
Squid	444	0.02	459	0.02	-4.07
Statistics	439	0.02	453	0.02	-3.89
Web	431	0.02	431	0.02	-0.82
IceWarp	396	0.02	377	0.02	4.17
Novell-HTTP-Server	394	0.02	407	0.02	-3.99
4D_WebStar_D	394	0.02	391	0.02	-0.06
MACOS_Personal_Websharing	387	0.02	403	0.02	-4.76
Domino-Go-Webserver	366	0.02	381	0.02	-4.73
OmniHTTPd	339	0.01	359	0.02	-6.35
Inktomi	337	0.01	352	0.02	-5.05
AkamaiGHost	299	0.01	662	0.03	-55.21
OpenSA	262	0.01	267	0.01	-2.68
EZproxy	262	0.01	250	0.01	3.94
Red	250	0.01	255	0.01	-2.77
DeleGate	236	0.01	232	0.01	0.89
cpaneld	233	0.01	208	0.01	11.10
Apache-NeoNova	233	0.01	229	0.01	0.91
UserLand	231	0.01	228	0.01	0.48
Ultraseek	226	0.01	223	0.01	0.51
MacHTTP	216	0.01	214	0.01	0.10
QuidProQuo	210	0.01	227	0.01	-8.25
oXeo	204	0.01	218	0.01	-7.19
Web_Server_4D	198	0.01	193	0.01	1.74
MHttpd	197	0.01	192	0.01	1.76
JavaWebServer	193	0.01	195	0.01	-1.84
Purveyor	188	0.01	188	0.01	-0.82
Netscape-Commerce	183	0.01	188	0.01	-3.46
WebSphere	175	0.01	166	0.01	4.55
IBM	171	0.01	171	0.01	-0.82
Tcl-Webserver	168	0.01	163	0.01	2.22
NaviServer	166	0.01	176	0.01	-6.46
Worldgroup	165	0.01	166	0.01	-1.42
Caudium	165	0.01	166	0.01	-1.42
Internet	160	0.01	161	0.01	-1.44
Tomcat	159	0.01	155	0.01	1.73
NetCache	158	0.01	157	0.01	-0.19
JRun	157	0.01	160	0.01	-2.68
mod_perl	154	0.01	149	0.01	2.50
MDNServer	154	0.01	151	0.01	1.15
HP-UX_Apache-based_Web_Server	153	0.01	146	0.01	3.93
Wapapi	146	0.01	139	0.01	4.17
HP	144	0.01	143	0.01	-0.13
WebtoB	143	0.01	139	0.01	2.03
LiveStats	135	0.01	131	0.01	2.20
Fujitsu-InfoProvider-Pro	135	0.01	0	0.00	N/A
publicfile	128	0.01	0	0.00	N/A

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.