You are viewing an outdated report.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) 15,148,073 hostnames, but only 2,633,770 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	May 2005 Count	May 2005 %	April 2005 Count	April 2005 %	Growth %
Apache	1,458,156	55.36	1,458,113	55.24	0.22
Microsoft-IIS	852,699	32.38	858,380	32.52	-0.45
null	81,732	3.10	79,346	3.01	3.23
Rapidsite	69,978	2.66	70,940	2.69	-1.15
Netscape-Enterprise	20,901	0.79	21,491	0.81	-2.54
Lotus-Domino	15,534	0.59	15,661	0.59	-0.60
Apache-AdvancedExtranetServer	10,310	0.39	10,538	0.40	-1.96
A	10,250	0.39	10,230	0.39	0.41
Apache-Coyote	5,775	0.22	5,543	0.21	4.41
IdeaWebServer	5,747	0.22	5,708	0.22	0.90
Zeus	5,511	0.21	5,595	0.21	-1.29
WebSTAR	3,683	0.14	3,770	0.14	-2.10
Ipswitch-IMail	3,581	0.14	3,605	0.14	-0.45
WN	3,540	0.13	3,626	0.14	-2.16
WebSitePro	3,110	0.12	3,353	0.13	-7.05
Zope	3,040	0.12	3,009	0.11	1.24
IBM_HTTP_SERVER	3,021	0.11	3,032	0.11	-0.15
Sun-ONE-Web-Server	2,871	0.11	2,783	0.11	3.38
WebSite	2,365	0.09	2,416	0.09	-1.90
Stronghold	2,323	0.09	2,362	0.09	-1.44
IBM_HTTP_Server	2,243	0.09	2,248	0.09	-0.01
WebServer	2,170	0.08	2,172	0.08	0.12
Oracle	2,001	0.08	2,013	0.08	-0.38
Resin	1,979	0.08	1,955	0.07	1.44
FileMakerPro	1,942	0.07	1,970	0.07	-1.21
NetWare-Enterprise-Web-Server	1,789	0.07	1,856	0.07	-3.41
4D_WebSTAR_S	1,456	0.06	1,460	0.06	-0.06
FirstClass	1,405	0.05	1,415	0.05	-0.50
squid	1,343	0.05	1,304	0.05	3.21
Jetty	1,308	0.05	1,326	0.05	-1.15
Netscape-FastTrack	1,232	0.05	1,295	0.05	-4.66
WebLogic	1,178	0.04	1,182	0.04	-0.13
IBM-HTTP-Server	1,122	0.04	1,148	0.04	-2.06
httpd+ssl	1,100	0.04	1,104	0.04	-0.15
Cougar	1,071	0.04	1,071	0.04	0.21
Oracle9iAS	1,055	0.04	1,076	0.04	-1.74
WDaemon	1,046	0.04	1,057	0.04	-0.83
IceWarp	953	0.04	935	0.04	2.14
thttpd	944	0.04	948	0.04	-0.21
Boa	940	0.04	958	0.04	-1.67
nginx	910	0.03	700	0.03	30.28
Oracle-Application-Server-10g	898	0.03	812	0.03	10.83
III	890	0.03	897	0.03	-0.57
CommuniGatePro	832	0.03	835	0.03	-0.15
NCSA	830	0.03	853	0.03	-2.49
AnWeb	815	0.03	848	0.03	-3.69
Web	753	0.03	739	0.03	2.11
SAMBAR	748	0.03	771	0.03	-2.78
AOLserver	741	0.03	744	0.03	-0.19
AppleShareIP	710	0.03	734	0.03	-3.06
Orion	568	0.02	575	0.02	-1.01
WebSphere	535	0.02	534	0.02	0.40
Xitami	534	0.02	546	0.02	-1.99
redir-httpd	503	0.02	475	0.02	6.12
DeleGate	490	0.02	498	0.02	-1.40
Simple,	474	0.02	482	0.02	-1.45
EZproxy	471	0.02	464	0.02	1.72
Roxen	465	0.02	470	0.02	-0.85
4D_WebStar_D	462	0.02	470	0.02	-1.49
OSU	456	0.02	471	0.02	-2.98
cpsrvd	418	0.02	427	0.02	-1.90
HPWB	389	0.01	431	0.02	-9.55
NetCache	379	0.01	372	0.01	2.10
Squid	354	0.01	364	0.01	-2.54
Ultraseek	348	0.01	351	0.01	-0.64
Roxen·Challenger	348	0.01	356	0.01	-2.04
AkamaiGHost	332	0.01	320	0.01	3.97
WebtoB	322	0.01	323	0.01	-0.10
Tcl-Webserver	319	0.01	309	0.01	3.46
Oracle_Web_Listener	311	0.01	317	0.01	-1.68
CERN	302	0.01	334	0.01	-9.39
Apache-NeoNova	296	0.01	289	0.01	2.64
oXeo	257	0.01	313	0.01	-17.72
lighttpd	253	0.01	224	0.01	13.19
Abyss	253	0.01	260	0.01	-2.49
Statistics	245	0.01	248	0.01	-1.00
Blocked	243	0.01	229	0.01	6.34
OpenSA	234	0.01	245	0.01	-4.29
Powered	222	0.01	227	0.01	-1.99
Domino-Go-Webserver	222	0.01	232	0.01	-4.11
GWS	218	0.01	215	0.01	1.61
UserLand	217	0.01	218	0.01	-0.25
Novell-HTTP-Server	215	0.01	223	0.01	-3.38
Lasso	201	0.01	208	0.01	-3.16
Inktomi	200	0.01	207	0.01	-3.18
Red	199	0.01	201	0.01	-0.78
Netscape-Communications	198	0.01	212	0.01	-6.41
JRun	195	0.01	197	0.01	-0.80
eSoft	193	0.01	184	0.01	5.11
IBM	177	0.01	177	0.01	0.21
Indy	172	0.01	175	0.01	-1.51
Caudium	172	0.01	170	0.01	1.39
Web_Server_4D	167	0.01	166	0.01	0.82
httpd	162	0.01	162	0.01	0.21
Internet	161	0.01	158	0.01	2.12
Polaris	157	0.01	160	0.01	-1.67
OmniHTTPd	156	0.01	159	0.01	-1.68
SilverStream	152	0.01	157	0.01	-2.98
Jeus	148	0.01	147	0.01	0.89
server*x.x.x	144	0.01	0	0.00	N/A

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.