You are viewing an outdated report.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) 14,522,738 hostnames, but only 2,373,501 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 2004 Count	April 2004 %	March 2004 Count	March 2004 %	Growth %
Apache	1,274,173	53.68	1,261,728	53.49	0.36
Microsoft-IIS	806,783	33.99	806,032	34.17	-0.52
Rapidsite	76,336	3.22	76,532	3.24	-0.87
null	51,092	2.15	49,136	2.08	3.34
Netscape-Enterprise	27,921	1.18	28,524	1.21	-2.72
Lotus-Domino	15,703	0.66	15,786	0.67	-1.14
Apache-AdvancedExtranetServer	9,363	0.39	9,250	0.39	0.60
A	8,517	0.36	8,405	0.36	0.71
Zeus	6,298	0.27	6,303	0.27	-0.70
WebSTAR	5,288	0.22	5,433	0.23	-3.27
WebSitePro	4,719	0.20	4,946	0.21	-5.18
IdeaWebServer	4,554	0.19	4,400	0.19	2.86
WN	4,379	0.18	4,460	0.19	-2.42
Stronghold	3,628	0.15	3,827	0.16	-5.78
Ipswitch-IMail	3,283	0.14	3,257	0.14	0.18
WebSite	2,825	0.12	2,835	0.12	-0.97
NetWare-Enterprise-Web-Server	2,807	0.12	2,838	0.12	-1.70
IBM_HTTP_SERVER	2,435	0.10	2,388	0.10	1.34
Zope	2,281	0.10	2,189	0.09	3.56
FileMakerPro	2,091	0.09	2,100	0.09	-1.04
IBM_HTTP_Server	2,071	0.09	2,068	0.09	-0.47
Oracle	1,917	0.08	1,936	0.08	-1.59
Netscape-FastTrack	1,888	0.08	1,951	0.08	-3.83
WebServer	1,473	0.06	1,401	0.06	4.49
IBM-HTTP-Server	1,424	0.06	1,440	0.06	-1.72
FirstClass	1,320	0.06	1,315	0.06	-0.24
Resin	1,285	0.05	1,244	0.05	2.66
4D_WebSTAR_S	1,260	0.05	1,233	0.05	1.56
WebLogic	1,192	0.05	1,144	0.05	3.55
NCSA	1,149	0.05	1,209	0.05	-5.55
AppleShareIP	1,097	0.05	1,128	0.05	-3.35
Oracle9iAS	1,039	0.04	1,033	0.04	-0.04
httpd+ssl	991	0.04	955	0.04	3.13
Jetty	978	0.04	959	0.04	1.35
SAMBAR	824	0.03	851	0.04	-3.77
WDaemon	810	0.03	782	0.03	2.94
Cougar	766	0.03	764	0.03	-0.36
squid	759	0.03	711	0.03	6.09
thttpd	741	0.03	718	0.03	2.57
Apache-Coyote	699	0.03	518	0.02	34.11
CommuniGatePro	698	0.03	688	0.03	0.83
AnWeb	690	0.03	655	0.03	4.69
AOLserver	689	0.03	682	0.03	0.40
Xitami	651	0.03	640	0.03	1.09
Boa	634	0.03	603	0.03	4.49
WWW	595	0.03	577	0.02	2.48
Orion	593	0.02	583	0.02	1.09
Lasso	585	0.02	592	0.03	-1.79
HPWB	577	0.02	599	0.03	-4.27
OSU	535	0.02	541	0.02	-1.72
Roxen	527	0.02	535	0.02	-2.10
Roxen·Challenger	509	0.02	526	0.02	-3.83
Oracle_Web_Listener	494	0.02	530	0.02	-7.37
Sun-ONE-Web-Server	490	0.02	415	0.02	17.34
Squid	475	0.02	504	0.02	-6.34
CERN	457	0.02	478	0.02	-4.98
Web	450	0.02	447	0.02	0.05
IceWarp	449	0.02	429	0.02	4.02
4D_WebStar_D	415	0.02	402	0.02	2.60
Statistics	413	0.02	428	0.02	-4.10
Netscape-Communications	413	0.02	412	0.02	-0.38
MACOS_Personal_Websharing	335	0.01	371	0.02	-10.26
Novell-HTTP-Server	328	0.01	364	0.02	-10.45
Domino-Go-Webserver	306	0.01	327	0.01	-7.00
EZproxy	297	0.01	283	0.01	4.30
Inktomi	296	0.01	306	0.01	-3.86
Ultraseek	277	0.01	263	0.01	4.67
oXeo	273	0.01	253	0.01	7.24
cpsrvd	260	0.01	239	0.01	8.12
WebSphere	256	0.01	244	0.01	4.27
DeleGate	248	0.01	241	0.01	2.27
OpenSA	246	0.01	255	0.01	-4.12
Apache-NeoNova	235	0.01	235	0.01	-0.62
UserLand	228	0.01	227	0.01	-0.18
AkamaiGHost	223	0.01	140	0.01	58.30
Red	219	0.01	225	0.01	-3.27
NetCache	212	0.01	179	0.01	17.71
MHttpd	208	0.01	199	0.01	3.88
Tcl-Webserver	206	0.01	203	0.01	0.85
Web_Server_4D	186	0.01	191	0.01	-3.22
OmniHTTPd	183	0.01	200	0.01	-9.06
MacHTTP	175	0.01	183	0.01	-4.96
JavaWebServer	175	0.01	175	0.01	-0.62
JRun	174	0.01	168	0.01	2.93
Worldgroup	170	0.01	151	0.01	11.89
WebtoB	169	0.01	167	0.01	0.57
Caudium	164	0.01	163	0.01	-0.01
Purveyor	163	0.01	162	0.01	-0.00
NaviServer	163	0.01	165	0.01	-1.82
Tomcat	162	0.01	165	0.01	-2.42
Internet	162	0.01	161	0.01	0.00
Abyss	162	0.01	143	0.01	12.59
IBM	159	0.01	166	0.01	-4.81
HP-UX_Apache-based_Web_Server	158	0.01	157	0.01	0.02
QuidProQuo	155	0.01	185	0.01	-16.73
Netscape-Commerce	155	0.01	160	0.01	-3.72
Wapapi	145	0.01	150	0.01	-3.93
MDNServer	144	0.01	146	0.01	-1.98
HP	142	0.01	148	0.01	-4.65
Jeus	137	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.