You are viewing an outdated report.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) 21,106,398 hostnames, but only 3,004,284 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 2006 Count	October 2006 %	September 2006 Count	September 2006 %	Growth %
Apache	1,715,424	57.10	1,693,936	56.95	0.26
Microsoft-IIS	889,612	29.61	887,584	29.84	-0.77
null	145,530	4.84	140,388	4.72	2.63
Rapidsite	67,354	2.24	67,263	2.26	-0.87
Netscape-Enterprise	14,750	0.49	15,017	0.50	-2.76
Lotus-Domino	14,645	0.49	14,724	0.50	-1.53
Apache-Coyote	13,852	0.46	13,204	0.44	3.86
A	13,026	0.43	12,845	0.43	0.39
IdeaWebServer	9,853	0.33	9,561	0.32	2.02
Apache-AdvancedExtranetServer	6,824	0.23	7,142	0.24	-5.41
NOYB	5,034	0.17	4,581	0.15	8.79
Zeus	4,758	0.16	4,810	0.16	-2.07
Sun-ONE-Web-Server	4,312	0.14	4,430	0.15	-3.64
Zope	3,904	0.13	3,801	0.13	1.68
IBM_HTTP_Server	3,515	0.12	3,415	0.11	1.90
lighttpd	3,286	0.11	3,078	0.10	5.69
WebServer	3,225	0.11	3,155	0.11	1.20
nginx	2,824	0.09	2,649	0.09	5.54
Ipswitch-IMail	2,789	0.09	2,852	0.10	-3.19
Resin	2,666	0.09	2,614	0.09	0.97
IBM_HTTP_SERVER	2,589	0.09	2,626	0.09	-2.40
WebSTAR	2,437	0.08	2,504	0.08	-3.65
squid	2,296	0.08	2,278	0.08	-0.22
Oracle-Application-Server-10g	2,278	0.08	2,198	0.07	2.60
WebSitePro	1,862	0.06	1,928	0.06	-4.39
Oracle	1,652	0.05	1,687	0.06	-3.05
Cougar	1,517	0.05	1,456	0.05	3.15
FileMakerPro	1,515	0.05	1,523	0.05	-1.52
Jetty	1,482	0.05	1,494	0.05	-1.80
WebSite	1,340	0.04	1,385	0.05	-4.22
IceWarp	1,317	0.04	1,302	0.04	0.14
WebLogic	1,305	0.04	1,321	0.04	-2.20
4D_WebSTAR_S	1,238	0.04	1,266	0.04	-3.19
WDaemon	1,233	0.04	1,239	0.04	-1.48
Boa	1,048	0.03	1,083	0.04	-4.20
thttpd	984	0.03	1,014	0.03	-3.93
GWS	971	0.03	890	0.03	8.01
III	963	0.03	956	0.03	-0.28
CommuniGatePro	960	0.03	941	0.03	1.00
AnWeb	947	0.03	894	0.03	4.87
httpd+ssl	943	0.03	919	0.03	1.58
Stronghold	902	0.03	1,035	0.03	-13.72
NetWare-Enterprise-Web-Server	850	0.03	892	0.03	-5.66
AkamaiGHost	837	0.03	649	0.02	27.68
AOLserver	768	0.03	780	0.03	-2.52
Oracle9iAS	738	0.02	755	0.03	-3.23
BIG-IP	724	0.02	673	0.02	6.50
EZproxy	693	0.02	682	0.02	0.60
Netscape-FastTrack	688	0.02	714	0.02	-4.61
Web	645	0.02	646	0.02	-1.15
SAMBAR	635	0.02	630	0.02	-0.21
FirstClass	617	0.02	665	0.02	-8.15
PowerSchool	608	0.02	575	0.02	4.68
4D_WebStar_D	562	0.02	553	0.02	0.61
NetCache	550	0.02	539	0.02	1.02
cpsrvd	549	0.02	536	0.02	1.40
IBM-HTTP-Server	535	0.02	555	0.02	-4.57
Orion	524	0.02	550	0.02	-5.68
DeleGate	513	0.02	518	0.02	-1.96
redir-httpd	499	0.02	504	0.02	-1.98
NCSA	490	0.02	501	0.02	-3.17
WebtoB	480	0.02	490	0.02	-3.02
WebSphere	428	0.01	563	0.02	-24.74
Roxen	409	0.01	406	0.01	-0.27
Xitami	392	0.01	405	0.01	-4.18
AppleShareIP	384	0.01	395	0.01	-3.76
Ultraseek	376	0.01	379	0.01	-1.78
OSU	364	0.01	375	0.01	-3.90
Abyss	320	0.01	321	0.01	-1.31
ListManagerWeb	285	0.01	282	0.01	0.05
LiteSpeed	267	0.01	237	0.01	11.53
EdgePrism	259	0.01	230	0.01	11.48
""	249	0.01	256	0.01	-3.71
HPWB	245	0.01	241	0.01	0.64
JRun	239	0.01	243	0.01	-2.63
Apache-NeoNova	239	0.01	244	0.01	-3.03
Simple,	233	0.01	255	0.01	-9.54
Nost	232	0.01	230	0.01	-0.14
IIS	224	0.01	231	0.01	-4.00
Indy	218	0.01	217	0.01	-0.54
Kucci	213	0.01	0	0.00	N/A
UserLand	209	0.01	209	0.01	-1.00
Squid	206	0.01	200	0.01	1.97
eSoft	204	0.01	208	0.01	-2.90
Tcl-Webserver	203	0.01	202	0.01	-0.51
httpd	200	0.01	201	0.01	-1.49
Jeus	200	0.01	186	0.01	6.45
Polaris	196	0.01	198	0.01	-2.00
NAB	191	0.01	193	0.01	-2.03
WebServerX	189	0.01	0	0.00	N/A
Roxen·Challenger	189	0.01	189	0.01	-1.00
Webserver	187	0.01	183	0.01	1.16
Disallowed	185	0.01	266	0.01	-31.15
Oracle_Web_Listener	184	0.01	184	0.01	-1.00
OpenSA	184	0.01	191	0.01	-4.63
Blocked	177	0.01	190	0.01	-7.77
Powered	176	0.01	184	0.01	-5.30
Microsoft-HTTPAPI	175	0.01	180	0.01	-3.75
WWW	173	0.01	175	0.01	-2.13
CERN	173	0.01	182	0.01	-5.90

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.