You are viewing an outdated report.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) 8,920,432 hostnames, but only 2,033,445 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	January 2003 Count	January 2003 %	December 2002 Count	December 2002 %	Growth %
Apache	1,050,778	51.67	1,000,006	51.72	-0.09
Microsoft-IIS	717,461	35.28	680,241	35.18	0.29
Rapidsite	64,636	3.18	60,929	3.15	0.87
Netscape-Enterprise	35,282	1.74	34,242	1.77	-2.03
null	30,682	1.51	29,150	1.51	0.08
Lotus-Domino	14,647	0.72	13,903	0.72	0.17
WebSTAR	7,656	0.38	7,556	0.39	-3.66
WebSitePro	7,611	0.37	7,575	0.39	-4.46
Apache-AdvancedExtranetServer	7,250	0.36	6,845	0.35	0.71
FrontPage	6,326	0.31	6,095	0.32	-1.31
Zeus	5,866	0.29	5,676	0.29	-1.73
A	5,743	0.28	5,230	0.27	4.41
Stronghold	5,542	0.27	5,551	0.29	-5.07
WN	5,381	0.26	5,230	0.27	-2.17
IdeaWebServer	3,793	0.19	3,595	0.19	0.32
NetWare-Enterprise-Web-Server	3,161	0.16	3,052	0.16	-1.52
Netscape-FastTrack	2,999	0.15	2,932	0.15	-2.74
WebSite	2,600	0.13	2,456	0.13	0.66
IBM_HTTP_Server	2,218	0.11	2,137	0.11	-1.31
Ipswitch-IMail	2,199	0.11	2,083	0.11	0.38
NCSA	2,096	0.10	2,066	0.11	-3.54
FileMakerPro	1,979	0.10	1,922	0.10	-2.10
Squid	1,676	0.08	1,639	0.08	-2.77
AppleShareIP	1,557	0.08	1,553	0.08	-4.67
IBM-HTTP-Server	1,504	0.07	1,471	0.08	-2.78
Oracle	1,369	0.07	1,283	0.07	1.46
Zope	1,235	0.06	1,128	0.06	4.10
IBM_HTTP_SERVER	1,177	0.06	1,068	0.06	4.79
Roxen·Challenger	1,143	0.06	1,174	0.06	-7.43
FirstClass	1,089	0.05	1,051	0.05	-1.48
HPWB	981	0.05	973	0.05	-4.14
CERN	848	0.04	831	0.04	-2.97
Oracle_Web_Listener	813	0.04	808	0.04	-4.33
WebLogic	772	0.04	741	0.04	-0.94
SAMBAR	740	0.04	732	0.04	-3.88
Xitami	732	0.04	689	0.04	1.02
Netscape-Communications	676	0.03	680	0.04	-5.48
Resin	670	0.03	615	0.03	3.59
OSU	601	0.03	584	0.03	-2.15
Roxen	589	0.03	563	0.03	-0.53
4D_WebSTAR_S	562	0.03	510	0.03	4.78
WebServer	557	0.03	121	0.01	337.70
AOLserver	555	0.03	529	0.03	-0.24
Lasso	553	0.03	518	0.03	1.51
Novell-HTTP-Server	537	0.03	569	0.03	-10.26
thttpd	527	0.03	497	0.03	0.82
Domino-Go-Webserver	499	0.02	490	0.03	-3.17
CommuniGatePro	463	0.02	436	0.02	0.97
Cougar	454	0.02	390	0.02	10.69
Statistics	453	0.02	443	0.02	-2.77
Orion	452	0.02	440	0.02	-2.32
MACOS_Personal_Websharing	448	0.02	424	0.02	0.47
WWW	438	0.02	426	0.02	-2.24
WDaemon	415	0.02	364	0.02	8.41
Web	408	0.02	390	0.02	-0.53
AnWeb	404	0.02	386	0.02	-0.48
httpd+ssl	388	0.02	340	0.02	8.51
Patchy	387	0.02	346	0.02	6.35
Inktomi	366	0.02	345	0.02	0.87
Oracle9iAS	354	0.02	300	0.02	12.20
OmniHTTPd	347	0.02	327	0.02	0.90
Boa	332	0.02	305	0.02	3.50
Red	289	0.01	278	0.01	-1.15
QuidProQuo	287	0.01	271	0.01	0.70
Jetty	283	0.01	239	0.01	12.59
Netscape-Commerce	270	0.01	270	0.01	-4.92
Apache-NeoNova	267	0.01	244	0.01	4.05
4D_WebStar_D	266	0.01	225	0.01	12.41
JavaWebServer	255	0.01	256	0.01	-5.29
MacHTTP	242	0.01	232	0.01	-0.82
mod_perl	238	0.01	241	0.01	-6.10
OpenSA	228	0.01	220	0.01	-1.46
Purveyor	219	0.01	212	0.01	-1.78
NaviServer	212	0.01	204	0.01	-1.19
Caudium	209	0.01	198	0.01	0.37
UserLand	207	0.01	203	0.01	-3.04
Web_Server_4D	206	0.01	202	0.01	-3.03
Netrox-Apache	193	0.01	183	0.01	0.28
Worldgroup	189	0.01	186	0.01	-3.38
squid	185	0.01	153	0.01	14.97
Commerce-Builder	170	0.01	160	0.01	1.03
IBM	167	0.01	161	0.01	-1.37
Ultraseek	163	0.01	168	0.01	-7.75
MHttpd	163	0.01	151	0.01	2.64
Internet	160	0.01	138	0.01	10.24
MDNServer	146	0.01	134	0.01	3.60
Powered	143	0.01	139	0.01	-2.18
Unknown	142	0.01	136	0.01	-0.72
NetCache	139	0.01	141	0.01	-6.27
IceWarp	133	0.01	107	0.01	18.19
ALEPH	133	0.01	120	0.01	5.38
Sun_WebServer	132	0.01	133	0.01	-5.63
Microsoft-PWS	131	0.01	119	0.01	4.67
JRun	126	0.01	113	0.01	6.02
SilverStream	125	0.01	121	0.01	-1.77
HP	123	0.01	107	0.01	9.30
Microsoft-PWS-95	118	0.01	124	0.01	-9.52
Oracle_Web_listener3.0.2.0.0	111	0.01	110	0.01	-4.05
Fujitsu-InfoProvider-Pro	110	0.01	0	0.00	N/A
Tomcat	109	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.