You are viewing an outdated report.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) 20,153,631 hostnames, but only 2,930,065 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 2006 Count	August 2006 %	July 2006 Count	July 2006 %	Growth %
Apache	1,664,879	56.82	1,647,710	56.69	0.23
Microsoft-IIS	882,262	30.11	880,588	30.30	-0.62
null	133,784	4.57	130,417	4.49	1.76
Rapidsite	67,321	2.30	67,372	2.32	-0.88
Netscape-Enterprise	15,360	0.52	15,474	0.53	-1.54
Lotus-Domino	14,737	0.50	14,756	0.51	-0.93
A	12,526	0.43	12,408	0.43	0.14
Apache-Coyote	12,455	0.43	12,057	0.41	2.47
IdeaWebServer	9,155	0.31	8,845	0.30	2.67
Apache-AdvancedExtranetServer	7,378	0.25	7,593	0.26	-3.61
Zeus	4,804	0.16	4,850	0.17	-1.75
Sun-ONE-Web-Server	4,319	0.15	4,235	0.15	1.16
NOYB	4,287	0.15	3,721	0.13	14.28
Zope	3,684	0.13	3,666	0.13	-0.32
IBM_HTTP_Server	3,316	0.11	3,197	0.11	2.89
WebServer	3,069	0.10	3,006	0.10	1.27
Ipswitch-IMail	2,947	0.10	3,037	0.10	-3.74
lighttpd	2,722	0.09	2,505	0.09	7.79
IBM_HTTP_SERVER	2,661	0.09	2,672	0.09	-1.21
Resin	2,587	0.09	2,552	0.09	0.56
WebSTAR	2,555	0.09	2,560	0.09	-1.00
nginx	2,527	0.09	2,409	0.08	4.05
squid	2,171	0.07	2,046	0.07	5.25
Oracle-Application-Server-10g	2,105	0.07	2,034	0.07	2.66
WebSitePro	2,015	0.07	2,085	0.07	-4.14
Oracle	1,686	0.06	1,728	0.06	-3.22
Jetty	1,473	0.05	1,484	0.05	-1.54
FileMakerPro	1,470	0.05	1,527	0.05	-4.51
WebSite	1,450	0.05	1,485	0.05	-3.14
Cougar	1,412	0.05	1,411	0.05	-0.74
WebLogic	1,293	0.04	1,365	0.05	-6.04
IceWarp	1,284	0.04	1,264	0.04	0.76
4D_WebSTAR_S	1,278	0.04	1,304	0.04	-2.78
WDaemon	1,211	0.04	1,219	0.04	-1.46
Stronghold	1,093	0.04	1,119	0.04	-3.11
Boa	1,028	0.04	1,022	0.04	-0.22
thttpd	1,022	0.03	1,018	0.04	-0.42
CommuniGatePro	944	0.03	933	0.03	0.36
III	936	0.03	944	0.03	-1.65
NetWare-Enterprise-Web-Server	925	0.03	985	0.03	-6.85
httpd+ssl	901	0.03	889	0.03	0.53
AnWeb	858	0.03	904	0.03	-5.85
GWS	802	0.03	755	0.03	5.37
Oracle9iAS	768	0.03	778	0.03	-2.08
AOLserver	758	0.03	758	0.03	-0.81
Netscape-FastTrack	725	0.02	774	0.03	-7.09
FirstClass	724	0.02	799	0.03	-10.12
EZproxy	665	0.02	656	0.02	0.56
AkamaiGHost	650	0.02	627	0.02	2.83
BIG-IP	639	0.02	605	0.02	4.77
Web	630	0.02	626	0.02	-0.17
SAMBAR	627	0.02	636	0.02	-2.21
WebSphere	604	0.02	610	0.02	-1.78
IBM-HTTP-Server	565	0.02	575	0.02	-2.53
Orion	545	0.02	539	0.02	0.30
NetCache	543	0.02	551	0.02	-2.25
PowerSchool	540	0.02	435	0.01	23.14
4D_WebStar_D	533	0.02	528	0.02	0.13
cpsrvd	521	0.02	514	0.02	0.55
DeleGate	516	0.02	517	0.02	-1.00
redir-httpd	505	0.02	503	0.02	-0.41
NCSA	494	0.02	527	0.02	-7.02
WebtoB	466	0.02	469	0.02	-1.44
Roxen	405	0.01	401	0.01	0.18
Xitami	396	0.01	401	0.01	-2.04
AppleShareIP	394	0.01	419	0.01	-6.72
OSU	374	0.01	380	0.01	-2.37
Ultraseek	367	0.01	370	0.01	-1.61
Disallowed	312	0.01	302	0.01	2.48
Abyss	305	0.01	310	0.01	-2.41
Simple,	272	0.01	302	0.01	-10.66
ListManagerWeb	272	0.01	249	0.01	8.36
HPWB	256	0.01	264	0.01	-3.81
""	249	0.01	247	0.01	-0.00
Apache-NeoNova	244	0.01	245	0.01	-1.21
JRun	240	0.01	235	0.01	1.31
kucci	237	0.01	228	0.01	3.11
IIS	219	0.01	206	0.01	5.45
Nost	216	0.01	214	0.01	0.12
EdgePrism	213	0.01	193	0.01	9.47
Blocked	213	0.01	204	0.01	3.57
eSoft	211	0.01	210	0.01	-0.33
Indy	207	0.01	203	0.01	1.15
LiteSpeed	205	0.01	174	0.01	16.87
Squid	203	0.01	205	0.01	-1.77
UserLand	200	0.01	213	0.01	-6.86
Polaris	199	0.01	198	0.01	-0.30
OpenSA	197	0.01	202	0.01	-3.26
Oracle_Web_Listener	194	0.01	196	0.01	-1.82
Tcl-Webserver	193	0.01	214	0.01	-10.54
Roxen·Challenger	192	0.01	192	0.01	-0.81
Powered	191	0.01	191	0.01	-0.81
httpd	189	0.01	201	0.01	-6.73
Webserver	189	0.01	194	0.01	-3.36
NAB	189	0.01	194	0.01	-3.36
Jeus	179	0.01	175	0.01	1.46
Microsoft-HTTPAPI	177	0.01	182	0.01	-3.53
CERN	176	0.01	186	0.01	-6.14
Statistics	169	0.01	170	0.01	-1.39
Server	169	0.01	172	0.01	-2.54

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.