You are viewing an outdated report. The latest version of this report was published on October 1st, 2024

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) 18,382,997 hostnames, but only 2,843,522 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	April 2006 Count	April 2006 %	March 2006 Count	March 2006 %	Growth %
Apache	1,598,387	56.21	1,582,914	56.02	0.34
Microsoft-IIS	875,475	30.79	877,606	31.06	-0.87
null	119,182	4.19	115,253	4.08	2.76
Rapidsite	68,789	2.42	69,127	2.45	-1.11
Netscape-Enterprise	16,494	0.58	16,863	0.60	-2.80
Lotus-Domino	15,046	0.53	15,161	0.54	-1.38
A	11,969	0.42	11,802	0.42	0.78
Apache-Coyote	10,705	0.38	10,330	0.37	2.98
Apache-AdvancedExtranetServer	8,394	0.30	8,655	0.31	-3.62
IdeaWebServer	7,998	0.28	7,798	0.28	1.92
Zeus	5,179	0.18	5,240	0.19	-1.78
Sun-ONE-Web-Server	3,963	0.14	3,895	0.14	1.11
Zope	3,570	0.13	3,574	0.13	-0.74
NOYB	3,494	0.12	3,181	0.11	9.15
Ipswitch-IMail	3,249	0.11	3,305	0.12	-2.31
IBM_HTTP_Server	2,945	0.10	2,857	0.10	2.43
WebSTAR	2,839	0.10	2,849	0.10	-0.98
IBM_HTTP_SERVER	2,810	0.10	2,890	0.10	-3.38
WebServer	2,789	0.10	2,714	0.10	2.12
WN	2,658	0.09	2,769	0.10	-4.61
Resin	2,426	0.09	2,435	0.09	-1.00
lighttpd	2,269	0.08	2,024	0.07	11.40
WebSitePro	2,216	0.08	2,294	0.08	-4.01
squid	1,919	0.07	1,884	0.07	1.22
WebSite	1,883	0.07	1,798	0.06	4.07
nginx	1,863	0.07	1,733	0.06	6.83
Oracle-Application-Server-10g	1,842	0.06	1,741	0.06	5.14
Oracle	1,802	0.06	1,822	0.06	-1.72
FileMakerPro	1,674	0.06	1,688	0.06	-1.45
Jetty	1,477	0.05	1,465	0.05	0.19
4D_WebSTAR_S	1,408	0.05	1,442	0.05	-2.97
Cougar	1,323	0.05	1,314	0.05	0.05
WebLogic	1,265	0.04	1,282	0.05	-1.95
Stronghold	1,223	0.04	1,316	0.05	-7.65
IceWarp	1,200	0.04	1,201	0.04	-0.71
WDaemon	1,166	0.04	1,150	0.04	0.75
NetWare-Enterprise-Web-Server	1,159	0.04	1,205	0.04	-4.42
FirstClass	1,106	0.04	1,197	0.04	-8.18
thttpd	1,067	0.04	1,063	0.04	-0.25
Boa	1,019	0.04	1,048	0.04	-3.38
III	941	0.03	943	0.03	-0.84
CommuniGatePro	938	0.03	920	0.03	1.32
httpd+ssl	909	0.03	911	0.03	-0.85
AnWeb	884	0.03	897	0.03	-2.07
Netscape-FastTrack	860	0.03	913	0.03	-6.40
Oracle9iAS	848	0.03	853	0.03	-1.21
AOLserver	758	0.03	754	0.03	-0.10
Web	695	0.02	727	0.03	-5.00
SAMBAR	669	0.02	685	0.02	-2.95
IBM-HTTP-Server	659	0.02	704	0.02	-6.98
EZproxy	625	0.02	615	0.02	0.99
AkamaiGHost	620	0.02	507	0.02	21.52
NCSA	572	0.02	593	0.02	-4.15
WebSphere	554	0.02	519	0.02	6.07
Orion	546	0.02	552	0.02	-1.71
GWS	539	0.02	460	0.02	16.44
4D_WebStar_D	535	0.02	533	0.02	-0.25
NetCache	525	0.02	509	0.02	2.50
DeleGate	518	0.02	507	0.02	1.53
redir-httpd	497	0.02	493	0.02	0.18
BIG-IP	491	0.02	444	0.02	9.89
AppleShareIP	483	0.02	503	0.02	-4.58
cpsrvd	478	0.02	478	0.02	-0.63
Xitami	432	0.02	444	0.02	-3.31
WebtoB	424	0.01	409	0.01	3.02
Roxen	419	0.01	414	0.01	0.57
OSU	395	0.01	399	0.01	-1.62
Ultraseek	370	0.01	380	0.01	-3.24
Simple,	367	0.01	392	0.01	-6.97
PowerSchool	362	0.01	343	0.01	4.88
Apache-NeoNova	315	0.01	298	0.01	5.04
Disallowed	309	0.01	0	0.00	N/A
HPWB	297	0.01	306	0.01	-3.55
Blocked	295	0.01	320	0.01	-8.39
Abyss	290	0.01	284	0.01	1.47
Tcl-Webserver	233	0.01	243	0.01	-4.72
JRun	233	0.01	228	0.01	1.55
Squid	230	0.01	244	0.01	-6.33
OpenSA	227	0.01	227	0.01	-0.63
Nost	222	0.01	0	0.00	N/A
Roxen·Challenger	218	0.01	224	0.01	-3.29
kucci	217	0.01	213	0.01	1.24
UserLand	216	0.01	219	0.01	-1.99
CERN	206	0.01	213	0.01	-3.89
eSoft	204	0.01	208	0.01	-2.54
Polaris	203	0.01	202	0.01	-0.14
Oracle_Web_Listener	202	0.01	217	0.01	-7.50
ListManagerWeb	201	0.01	189	0.01	5.68
Powered	196	0.01	196	0.01	-0.63
NAB	191	0.01	193	0.01	-1.66
Webserver	190	0.01	179	0.01	5.48
Jeus	184	0.01	177	0.01	3.30
Indy	184	0.01	189	0.01	-3.26
httpd	181	0.01	168	0.01	7.06
Statistics	181	0.01	188	0.01	-4.33
Caudium	172	0.01	169	0.01	1.14
""	165	0.01	163	0.01	0.59
Internet	160	0.01	163	0.01	-2.46
Domino-Go-Webserver	157	0.01	166	0.01	-6.02
Lasso	155	0.01	158	0.01	-2.51

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.