You are viewing an outdated report.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) 19,863,342 hostnames, but only 2,906,467 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	July 2006 Count	July 2006 %	June 2006 Count	June 2006 %	Growth %
Apache	1,647,710	56.69	1,634,381	56.55	0.25
Microsoft-IIS	880,588	30.30	879,222	30.42	-0.41
null	130,417	4.49	126,379	4.37	2.61
Rapidsite	67,372	2.32	68,560	2.37	-2.29
Netscape-Enterprise	15,474	0.53	15,823	0.55	-2.76
Lotus-Domino	14,756	0.51	14,931	0.52	-1.73
A	12,408	0.43	12,251	0.42	0.71
Apache-Coyote	12,057	0.41	11,558	0.40	3.73
IdeaWebServer	8,845	0.30	8,530	0.30	3.11
Apache-AdvancedExtranetServer	7,593	0.26	7,920	0.27	-4.67
Zeus	4,850	0.17	5,040	0.17	-4.31
Sun-ONE-Web-Server	4,235	0.15	4,103	0.14	2.63
NOYB	3,721	0.13	3,554	0.12	4.11
Zope	3,666	0.13	3,647	0.13	-0.05
IBM_HTTP_Server	3,197	0.11	3,163	0.11	0.50
Ipswitch-IMail	3,037	0.10	3,106	0.11	-2.77
WebServer	3,006	0.10	2,915	0.10	2.54
IBM_HTTP_SERVER	2,672	0.09	2,727	0.09	-2.57
WebSTAR	2,560	0.09	2,691	0.09	-5.41
Resin	2,552	0.09	2,519	0.09	0.74
lighttpd	2,505	0.09	2,713	0.09	-8.19
nginx	2,409	0.08	2,226	0.08	7.61
WebSitePro	2,085	0.07	2,098	0.07	-1.18
squid	2,046	0.07	2,043	0.07	-0.42
Oracle-Application-Server-10g	2,034	0.07	1,972	0.07	2.56
Oracle	1,728	0.06	1,731	0.06	-0.74
FileMakerPro	1,527	0.05	1,581	0.05	-3.96
WebSite	1,485	0.05	1,585	0.05	-6.84
Jetty	1,484	0.05	1,458	0.05	1.21
Cougar	1,411	0.05	1,377	0.05	1.89
WebLogic	1,365	0.05	1,293	0.04	4.97
4D_WebSTAR_S	1,304	0.04	1,345	0.05	-3.60
IceWarp	1,264	0.04	1,259	0.04	-0.17
WDaemon	1,219	0.04	1,199	0.04	1.09
Stronghold	1,119	0.04	1,172	0.04	-5.06
Boa	1,022	0.04	1,011	0.03	0.52
thttpd	1,018	0.04	1,045	0.04	-3.13
NetWare-Enterprise-Web-Server	985	0.03	1,067	0.04	-8.21
III	944	0.03	940	0.03	-0.14
CommuniGatePro	933	0.03	944	0.03	-1.72
AnWeb	904	0.03	934	0.03	-3.76
httpd+ssl	889	0.03	918	0.03	-3.71
FirstClass	799	0.03	966	0.03	-17.76
Oracle9iAS	778	0.03	808	0.03	-4.26
Netscape-FastTrack	774	0.03	803	0.03	-4.16
AOLserver	758	0.03	760	0.03	-0.83
GWS	755	0.03	681	0.02	10.24
EZproxy	656	0.02	646	0.02	0.97
SAMBAR	636	0.02	649	0.02	-2.56
AkamaiGHost	627	0.02	601	0.02	3.74
Web	626	0.02	652	0.02	-4.53
WebSphere	610	0.02	582	0.02	4.22
BIG-IP	605	0.02	561	0.02	7.23
IBM-HTTP-Server	575	0.02	597	0.02	-4.23
NetCache	551	0.02	542	0.02	1.09
Orion	539	0.02	549	0.02	-2.38
4D_WebStar_D	528	0.02	537	0.02	-2.23
NCSA	527	0.02	552	0.02	-5.07
DeleGate	517	0.02	515	0.02	-0.18
cpsrvd	514	0.02	500	0.02	2.22
redir-httpd	503	0.02	501	0.02	-0.17
WebtoB	469	0.02	456	0.02	2.27
PowerSchool	435	0.01	411	0.01	5.24
AppleShareIP	419	0.01	444	0.02	-6.16
Xitami	401	0.01	422	0.01	-5.51
Roxen	401	0.01	399	0.01	-0.07
OSU	380	0.01	387	0.01	-2.36
Ultraseek	370	0.01	374	0.01	-1.63
Abyss	310	0.01	314	0.01	-1.83
Simple,	302	0.01	309	0.01	-2.82
Disallowed	302	0.01	320	0.01	-6.16
HPWB	264	0.01	266	0.01	-1.31
ListManagerWeb	249	0.01	231	0.01	7.18
""	247	0.01	243	0.01	1.07
Apache-NeoNova	245	0.01	248	0.01	-1.77
JRun	235	0.01	229	0.01	2.04
kucci	228	0.01	226	0.01	0.32
Tcl-Webserver	214	0.01	221	0.01	-3.71
Nost	214	0.01	222	0.01	-4.15
UserLand	213	0.01	216	0.01	-1.95
eSoft	210	0.01	210	0.01	-0.56
IIS	206	0.01	198	0.01	3.45
Squid	205	0.01	214	0.01	-4.75
Blocked	204	0.01	201	0.01	0.92
Indy	203	0.01	196	0.01	2.99
OpenSA	202	0.01	207	0.01	-2.97
httpd	201	0.01	200	0.01	-0.07
Polaris	198	0.01	201	0.01	-2.05
Oracle_Web_Listener	196	0.01	203	0.01	-3.99
Webserver	194	0.01	198	0.01	-2.57
NAB	194	0.01	193	0.01	-0.05
EdgePrism	193	0.01	165	0.01	16.31
Roxen·Challenger	192	0.01	198	0.01	-3.58
Powered	191	0.01	190	0.01	-0.04
CERN	186	0.01	188	0.01	-1.62
Microsoft-HTTPAPI	182	0.01	167	0.01	8.37
Jeus	175	0.01	186	0.01	-6.45
LiteSpeed	174	0.01	0	0.00	N/A
Server	172	0.01	0	0.00	N/A
Statistics	170	0.01	176	0.01	-3.95

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.