You are viewing an outdated report.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) 15,400,264 hostnames, but only 2,621,562 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	August 2005 Count	August 2005 %	July 2005 Count	July 2005 %	Growth %
Apache	1,456,018	55.54	1,456,875	55.49	0.10
Microsoft-IIS	838,038	31.97	844,104	32.15	-0.56
null	90,318	3.45	87,096	3.32	3.86
Rapidsite	68,804	2.62	69,130	2.63	-0.32
Netscape-Enterprise	19,634	0.75	20,056	0.76	-1.95
Lotus-Domino	15,165	0.58	15,286	0.58	-0.64
A	10,472	0.40	10,350	0.39	1.34
Apache-AdvancedExtranetServer	9,845	0.38	10,012	0.38	-1.51
Apache-Coyote	6,684	0.25	6,356	0.24	5.33
IdeaWebServer	5,934	0.23	5,899	0.22	0.75
Zeus	5,399	0.21	5,436	0.21	-0.53
Ipswitch-IMail	3,396	0.13	3,474	0.13	-2.09
WebSTAR	3,339	0.13	3,402	0.13	-1.70
WN	3,309	0.13	3,410	0.13	-2.81
Sun-ONE-Web-Server	3,140	0.12	3,024	0.12	4.00
Zope	3,101	0.12	3,085	0.12	0.68
IBM_HTTP_SERVER	2,990	0.11	3,009	0.11	-0.48
WebSitePro	2,766	0.11	2,905	0.11	-4.64
IBM_HTTP_Server	2,282	0.09	2,269	0.09	0.73
WebServer	2,211	0.08	2,179	0.08	1.63
WebSite	2,095	0.08	2,106	0.08	-0.37
Resin	2,000	0.08	1,982	0.08	1.07
Oracle	1,916	0.07	1,960	0.07	-2.09
Stronghold	1,780	0.07	2,044	0.08	-12.78
FileMakerPro	1,749	0.07	1,809	0.07	-3.17
squid	1,466	0.06	1,398	0.05	5.03
NetWare-Enterprise-Web-Server	1,453	0.06	1,576	0.06	-7.66
4D_WebSTAR_S	1,429	0.05	1,443	0.05	-0.82
FirstClass	1,353	0.05	1,355	0.05	0.01
Jetty	1,280	0.05	1,295	0.05	-1.00
WebLogic	1,165	0.04	1,186	0.05	-1.62
nginx	1,122	0.04	1,039	0.04	8.16
Netscape-FastTrack	1,112	0.04	1,166	0.04	-4.48
Cougar	1,078	0.04	1,060	0.04	1.86
httpd+ssl	1,077	0.04	1,089	0.04	-0.95
NOYB	1,071	0.04	0	0.00	N/A
Oracle-Application-Server-10g	1,070	0.04	1,025	0.04	4.55
WDaemon	1,014	0.04	1,036	0.04	-1.97
Oracle9iAS	1,004	0.04	1,022	0.04	-1.61
IBM-HTTP-Server	992	0.04	1,002	0.04	-0.84
IceWarp	966	0.04	981	0.04	-1.37
thttpd	930	0.04	921	0.04	1.14
Boa	896	0.03	895	0.03	0.27
III	893	0.03	898	0.03	-0.40
CommuniGatePro	825	0.03	828	0.03	-0.21
AnWeb	751	0.03	809	0.03	-7.02
AOLserver	724	0.03	724	0.03	0.16
NCSA	707	0.03	748	0.03	-5.33
Web	697	0.03	710	0.03	-1.68
SAMBAR	687	0.03	730	0.03	-5.74
AppleShareIP	598	0.02	608	0.02	-1.49
Orion	554	0.02	569	0.02	-2.48
WebSphere	530	0.02	535	0.02	-0.78
redir-httpd	500	0.02	501	0.02	-0.04
DeleGate	491	0.02	499	0.02	-1.45
EZproxy	490	0.02	476	0.02	3.10
Xitami	479	0.02	485	0.02	-1.08
4D_WebStar_D	456	0.02	457	0.02	-0.06
Simple,	450	0.02	441	0.02	2.20
Roxen	446	0.02	449	0.02	-0.51
OSU	439	0.02	446	0.02	-1.42
cpsrvd	424	0.02	410	0.02	3.58
lighttpd	422	0.02	340	0.01	24.31
NetCache	392	0.01	392	0.01	0.16
HPWB	364	0.01	371	0.01	-1.73
Ultraseek	359	0.01	360	0.01	-0.12
WebtoB	349	0.01	343	0.01	1.91
AkamaiGHost	348	0.01	310	0.01	12.43
Squid	319	0.01	327	0.01	-2.29
Roxen·Challenger	315	0.01	326	0.01	-3.22
Tcl-Webserver	296	0.01	317	0.01	-6.48
Apache-NeoNova	286	0.01	290	0.01	-1.22
Oracle_Web_Listener	284	0.01	294	0.01	-3.25
CERN	251	0.01	256	0.01	-1.80
GWS	245	0.01	237	0.01	3.54
Blocked	242	0.01	236	0.01	2.70
Abyss	241	0.01	236	0.01	2.28
OpenSA	232	0.01	233	0.01	-0.27
Statistics	228	0.01	235	0.01	-2.83
oXeo	222	0.01	242	0.01	-8.12
JRun	214	0.01	207	0.01	3.54
Powered	211	0.01	209	0.01	1.12
eSoft	202	0.01	202	0.01	0.16
UserLand	201	0.01	211	0.01	-4.59
kucci	197	0.01	198	0.01	-0.35
Domino-Go-Webserver	196	0.01	205	0.01	-4.24
Webserver	194	0.01	0	0.00	N/A
Inktomi	183	0.01	193	0.01	-5.03
Lasso	180	0.01	194	0.01	-7.07
Netscape-Communications	179	0.01	187	0.01	-4.13
Red	178	0.01	181	0.01	-1.50
IBM	172	0.01	175	0.01	-1.56
Caudium	167	0.01	168	0.01	-0.44
Internet	162	0.01	162	0.01	0.16
Indy	158	0.01	162	0.01	-2.32
Web_Server_4D	157	0.01	159	0.01	-1.10
httpd	156	0.01	153	0.01	2.12
OmniHTTPd	153	0.01	153	0.01	0.16
Polaris	151	0.01	152	0.01	-0.50
Jeus	150	0.01	147	0.01	2.20

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.