You are viewing an outdated report.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) 17,864,725 hostnames, but only 2,825,671 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	March 2006 Count	March 2006 %	February 2006 Count	February 2006 %	Growth %
Apache	1,582,914	56.02	1,563,364	55.92	0.17
Microsoft-IIS	877,606	31.06	871,921	31.19	-0.42
null	115,253	4.08	111,459	3.99	2.30
Rapidsite	69,127	2.45	69,963	2.50	-2.25
Netscape-Enterprise	16,863	0.60	17,029	0.61	-2.03
Lotus-Domino	15,161	0.54	15,162	0.54	-1.07
A	11,802	0.42	11,611	0.42	0.56
Apache-Coyote	10,330	0.37	9,820	0.35	4.08
Apache-AdvancedExtranetServer	8,655	0.31	8,808	0.32	-2.78
IdeaWebServer	7,798	0.28	7,551	0.27	2.17
Zeus	5,240	0.19	5,283	0.19	-1.87
Sun-ONE-Web-Server	3,895	0.14	3,743	0.13	2.95
Zope	3,574	0.13	3,487	0.12	1.41
Ipswitch-IMail	3,305	0.12	3,342	0.12	-2.16
NOYB	3,181	0.11	2,904	0.10	8.37
IBM_HTTP_SERVER	2,890	0.10	2,911	0.10	-1.78
IBM_HTTP_Server	2,857	0.10	2,725	0.10	3.73
WebSTAR	2,849	0.10	2,905	0.10	-2.97
WN	2,769	0.10	2,854	0.10	-4.01
WebServer	2,714	0.10	2,681	0.10	0.15
Resin	2,435	0.09	2,382	0.09	1.14
WebSitePro	2,294	0.08	2,388	0.09	-4.96
lighttpd	2,024	0.07	1,858	0.07	7.78
squid	1,884	0.07	1,825	0.07	2.14
Oracle	1,822	0.06	1,920	0.07	-6.11
WebSite	1,798	0.06	1,969	0.07	-9.66
Oracle-Application-Server-10g	1,741	0.06	1,589	0.06	8.40
nginx	1,733	0.06	1,606	0.06	6.76
FileMakerPro	1,688	0.06	1,681	0.06	-0.65
Jetty	1,465	0.05	1,431	0.05	1.29
4D_WebSTAR_S	1,442	0.05	1,440	0.05	-0.93
Stronghold	1,316	0.05	1,455	0.05	-10.51
Cougar	1,314	0.05	1,247	0.04	4.25
WebLogic	1,282	0.05	1,285	0.05	-1.29
NetWare-Enterprise-Web-Server	1,205	0.04	1,218	0.04	-2.12
IceWarp	1,201	0.04	1,155	0.04	2.88
FirstClass	1,197	0.04	1,259	0.05	-5.94
WDaemon	1,150	0.04	1,138	0.04	-0.02
thttpd	1,063	0.04	1,065	0.04	-1.25
Boa	1,048	0.04	1,029	0.04	0.76
III	943	0.03	936	0.03	-0.32
CommuniGatePro	920	0.03	914	0.03	-0.41
Netscape-FastTrack	913	0.03	940	0.03	-3.90
httpd+ssl	911	0.03	923	0.03	-2.35
AnWeb	897	0.03	874	0.03	1.54
Oracle9iAS	853	0.03	859	0.03	-1.75
AOLserver	754	0.03	752	0.03	-0.80
Web	727	0.03	732	0.03	-1.74
IBM-HTTP-Server	704	0.02	722	0.03	-3.53
SAMBAR	685	0.02	659	0.02	2.84
EZproxy	615	0.02	600	0.02	1.41
NCSA	593	0.02	588	0.02	-0.22
Orion	552	0.02	562	0.02	-2.82
4D_WebStar_D	533	0.02	527	0.02	0.06
WebSphere	519	0.02	524	0.02	-2.01
NetCache	509	0.02	476	0.02	5.80
DeleGate	507	0.02	503	0.02	-0.28
AkamaiGHost	507	0.02	493	0.02	1.75
AppleShareIP	503	0.02	514	0.02	-3.18
redir-httpd	493	0.02	497	0.02	-1.86
cpsrvd	478	0.02	485	0.02	-2.49
GWS	460	0.02	423	0.02	7.59
Xitami	444	0.02	429	0.02	2.40
BIG-IP	444	0.02	436	0.02	0.75
Roxen	414	0.01	425	0.02	-3.62
WebtoB	409	0.01	402	0.01	0.66
OSU	399	0.01	401	0.01	-1.56
Simple,	392	0.01	411	0.01	-5.64
Ultraseek	380	0.01	382	0.01	-1.58
PowerSchool	343	0.01	318	0.01	6.72
Blocked	320	0.01	312	0.01	1.47
HPWB	306	0.01	312	0.01	-2.97
Apache-NeoNova	298	0.01	296	0.01	-0.39
Abyss	284	0.01	287	0.01	-2.10
Squid	244	0.01	237	0.01	1.86
Tcl-Webserver	243	0.01	249	0.01	-3.45
JRun	228	0.01	225	0.01	0.26
OpenSA	227	0.01	228	0.01	-1.50
Roxen·Challenger	224	0.01	233	0.01	-4.88
UserLand	219	0.01	244	0.01	-11.20
Oracle_Web_Listener	217	0.01	228	0.01	-5.84
kucci	213	0.01	213	0.01	-1.06
CERN	213	0.01	219	0.01	-3.77
eSoft	208	0.01	203	0.01	1.37
Polaris	202	0.01	193	0.01	3.55
Powered	196	0.01	196	0.01	-1.06
NAB	193	0.01	197	0.01	-3.07
ListManagerWeb	189	0.01	166	0.01	12.65
Indy	189	0.01	192	0.01	-2.61
Statistics	188	0.01	198	0.01	-6.06
Webserver	179	0.01	206	0.01	-14.03
Jeus	177	0.01	179	0.01	-2.17
Caudium	169	0.01	170	0.01	-1.64
httpd	168	0.01	173	0.01	-3.92
Domino-Go-Webserver	166	0.01	165	0.01	-0.46
Internet	163	0.01	0	0.00	N/A
""	163	0.01	158	0.01	2.07
Lasso	158	0.01	159	0.01	-1.69
Server	152	0.01	0	0.00	N/A
Red	152	0.01	156	0.01	-3.60

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.