You are viewing an outdated report.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) 8,413,854 hostnames, but only 1,976,033 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 2002 Count	November 2002 %	October 2002 Count	October 2002 %	Growth %
Apache	1,015,838	51.41	1,014,387	51.18	0.44
Microsoft-IIS	697,778	35.31	702,668	35.46	-0.40
Rapidsite	62,985	3.19	63,274	3.19	-0.16
Netscape-Enterprise	35,874	1.82	37,161	1.88	-3.18
null	30,016	1.52	30,279	1.53	-0.58
Lotus-Domino	14,424	0.73	14,532	0.73	-0.45
WebSitePro	8,068	0.41	8,209	0.41	-1.43
WebSTAR	7,920	0.40	8,316	0.42	-4.48
Apache-AdvancedExtranetServer	6,965	0.35	7,103	0.36	-1.65
FrontPage	6,353	0.32	6,385	0.32	-0.21
Stronghold	5,875	0.30	6,059	0.31	-2.75
Zeus	5,794	0.29	5,910	0.30	-1.67
WN	5,635	0.29	5,833	0.29	-3.11
A	5,326	0.27	5,212	0.26	2.49
IdeaWebServer	3,693	0.19	3,734	0.19	-0.81
Netscape-FastTrack	3,135	0.16	3,229	0.16	-2.63
NetWare-Enterprise-Web-Server	3,130	0.16	3,174	0.16	-1.10
WebSite	2,542	0.13	2,404	0.12	6.05
NCSA	2,229	0.11	2,328	0.12	-3.97
IBM_HTTP_Server	2,205	0.11	2,268	0.11	-2.49
Squid	2,085	0.11	1,506	0.08	38.85
Ipswitch-IMail	2,044	0.10	2,020	0.10	1.49
FileMakerPro	1,937	0.10	1,935	0.10	0.40
AppleShareIP	1,614	0.08	1,686	0.09	-3.99
IBM-HTTP-Server	1,459	0.07	1,488	0.08	-1.66
Oracle	1,266	0.06	1,244	0.06	2.07
Roxen·Challenger	1,250	0.06	1,273	0.06	-1.52
Zope	1,102	0.06	1,059	0.05	4.37
FirstClass	1,056	0.05	1,061	0.05	-0.18
HPWB	1,019	0.05	1,052	0.05	-2.85
IBM_HTTP_SERVER	996	0.05	880	0.04	13.51
Oracle_Web_Listener	872	0.04	904	0.05	-3.26
CERN	870	0.04	916	0.05	-4.74
Netscape-Communications	749	0.04	782	0.04	-3.94
WebLogic	745	0.04	735	0.04	1.66
SAMBAR	732	0.04	761	0.04	-3.53
Xitami	700	0.04	714	0.04	-1.67
OSU	621	0.03	640	0.03	-2.68
Novell-HTTP-Server	606	0.03	623	0.03	-2.44
Resin	583	0.03	555	0.03	5.35
Roxen	561	0.03	590	0.03	-4.64
Lasso	538	0.03	554	0.03	-2.60
AOLserver	537	0.03	535	0.03	0.67
Domino-Go-Webserver	522	0.03	535	0.03	-2.14
4D_WebSTAR_S	469	0.02	399	0.02	17.89
thttpd	468	0.02	522	0.03	-10.08
Statistics	452	0.02	467	0.02	-2.93
MACOS_Personal_Websharing	437	0.02	452	0.02	-3.03
CommuniGatePro	432	0.02	426	0.02	1.71
Orion	429	0.02	426	0.02	1.00
WWW	427	0.02	422	0.02	1.48
Cougar	417	0.02	407	0.02	2.76
Web	389	0.02	384	0.02	1.60
AnWeb	380	0.02	400	0.02	-4.72
Patchy	379	0.02	0	0.00	N/A
WDaemon	360	0.02	369	0.02	-2.15
OmniHTTPd	343	0.02	346	0.02	-0.58
Inktomi	337	0.02	339	0.02	-0.30
Red	316	0.02	333	0.02	-4.83
Netscape-Commerce	292	0.01	298	0.02	-1.73
httpd+ssl	288	0.01	264	0.01	9.41
Boa	288	0.01	305	0.02	-5.30
QuidProQuo	286	0.01	290	0.01	-1.09
Apache-NeoNova	275	0.01	277	0.01	-0.43
Oracle9iAS	273	0.01	233	0.01	17.51
JavaWebServer	273	0.01	280	0.01	-2.21
mod_perl	271	0.01	290	0.01	-6.28
MacHTTP	252	0.01	260	0.01	-2.79
A-P-A-C-H-E	231	0.01	281	0.01	-17.55
Purveyor	225	0.01	228	0.01	-1.03
NaviServer	223	0.01	230	0.01	-2.76
4D_WebStar_D	215	0.01	208	0.01	3.67
UserLand	208	0.01	204	0.01	2.26
Web_Server_4D	205	0.01	209	0.01	-1.63
OpenSA	205	0.01	187	0.01	9.95
Netrox-Apache	201	0.01	211	0.01	-4.46
Jetty	200	0.01	190	0.01	5.57
Caudium	197	0.01	172	0.01	14.87
Commerce-Builder	187	0.01	195	0.01	-3.82
Worldgroup	184	0.01	189	0.01	-2.36
Ultraseek	179	0.01	189	0.01	-5.01
MediaGalaxy	168	0.01	171	0.01	-1.47
IBM	165	0.01	168	0.01	-1.50
MHttpd	157	0.01	155	0.01	1.59
Powered	148	0.01	151	0.01	-1.70
MDNServer	148	0.01	148	0.01	0.29
squid	147	0.01	0	0.00	N/A
Internet	147	0.01	145	0.01	1.68
NetCache	145	0.01	148	0.01	-1.74
Sun_WebServer	143	0.01	152	0.01	-5.64
Unknown	142	0.01	136	0.01	4.72
Microsoft-PWS-95	135	0.01	142	0.01	-4.65
SilverStream	133	0.01	133	0.01	0.29
ALEPH	127	0.01	137	0.01	-7.03
AkamaiGHost	126	0.01	0	0.00	N/A
Microsoft-PWS	124	0.01	136	0.01	-8.56
PoSHTTPd	117	0.01	116	0.01	1.16
Oracle_Web_listener3.0.2.0.0	116	0.01	124	0.01	-6.18
David-WebBox	112	0.01	114	0.01	-1.47
JRun	110	0.01	110	0.01	0.29

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.