You are viewing an outdated report.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) 9,045,027 hostnames, but only 1,947,616 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	September 2002 Count	September 2002 %	August 2002 Count	August 2002 %	Growth %
Apache	1,000,762	51.38	991,798	51.14	0.49
Microsoft-IIS	689,015	35.38	688,685	35.51	-0.37
Rapidsite	62,809	3.22	62,426	3.22	0.20
Netscape-Enterprise	37,260	1.91	38,050	1.96	-2.48
null	29,444	1.51	28,730	1.48	2.06
Lotus-Domino	14,345	0.74	14,351	0.74	-0.46
WebSTAR	8,461	0.43	8,557	0.44	-1.53
WebSitePro	8,337	0.43	8,680	0.45	-4.35
Apache-AdvancedExtranetServer	7,046	0.36	6,895	0.36	1.77
FrontPage	6,649	0.34	6,709	0.35	-1.31
Stronghold	6,166	0.32	6,364	0.33	-3.51
Zeus	6,162	0.32	6,143	0.32	-0.11
WN	6,047	0.31	6,203	0.32	-2.92
IdeaWebServer	3,739	0.19	3,703	0.19	0.55
Netscape-FastTrack	3,316	0.17	3,405	0.18	-3.02
NetWare-Enterprise-Web-Server	3,127	0.16	3,137	0.16	-0.73
NCSA	2,417	0.12	2,515	0.13	-4.29
WebSite	2,379	0.12	2,271	0.12	4.32
IBM_HTTP_Server	2,305	0.12	2,331	0.12	-1.53
Ipswitch-IMail	1,945	0.10	1,891	0.10	2.43
FileMakerPro	1,928	0.10	1,942	0.10	-1.13
AppleShareIP	1,683	0.09	1,684	0.09	-0.47
Squid	1,556	0.08	2,315	0.12	-33.06
IBM-HTTP-Server	1,444	0.07	1,472	0.08	-2.31
Roxen·Challenger	1,300	0.07	1,332	0.07	-2.81
Oracle	1,161	0.06	1,118	0.06	3.42
HPWB	1,053	0.05	1,081	0.06	-2.99
FirstClass	1,041	0.05	1,033	0.05	0.36
Zope	1,007	0.05	984	0.05	1.91
CERN	949	0.05	992	0.05	-4.73
Oracle_Web_Listener	948	0.05	982	0.05	-3.86
Netscape-Communications	790	0.04	833	0.04	-5.56
IBM_HTTP_SERVER	757	0.04	681	0.04	10.70
SAMBAR	739	0.04	731	0.04	0.68
WebLogic	717	0.04	718	0.04	-0.55
Xitami	703	0.04	679	0.04	3.11
OSU	655	0.03	660	0.03	-1.17
Novell-HTTP-Server	654	0.03	687	0.04	-5.20
Roxen	584	0.03	600	0.03	-3.07
thttpd	543	0.03	529	0.03	2.22
Domino-Go-Webserver	540	0.03	564	0.03	-4.65
Resin	522	0.03	492	0.03	5.66
Lasso	515	0.03	526	0.03	-2.50
AOLserver	505	0.03	502	0.03	0.18
Statistics	459	0.02	463	0.02	-1.27
WWW	425	0.02	418	0.02	1.25
MACOS_Personal_Websharing	425	0.02	444	0.02	-4.68
Orion	424	0.02	415	0.02	1.75
CommuniGatePro	409	0.02	384	0.02	6.07
Cougar	394	0.02	389	0.02	0.87
Web	386	0.02	378	0.02	1.69
WDaemon	371	0.02	339	0.02	8.99
AnWeb	369	0.02	339	0.02	8.40
Red	367	0.02	366	0.02	-0.14
OmniHTTPd	338	0.02	352	0.02	-4.38
Inktomi	333	0.02	323	0.02	2.67
4D_WebSTAR_S	321	0.02	294	0.02	8.73
Netscape-Commerce	318	0.02	347	0.02	-8.74
QuidProQuo	307	0.02	318	0.02	-3.86
mod_perl	289	0.01	303	0.02	-5.02
JavaWebServer	286	0.01	298	0.02	-4.42
Boa	280	0.01	278	0.01	0.30
MacHTTP	266	0.01	261	0.01	1.49
NaviServer	252	0.01	264	0.01	-4.94
Purveyor	243	0.01	253	0.01	-4.35
httpd+ssl	240	0.01	200	0.01	19.50
Netrox-Apache	212	0.01	200	0.01	5.56
Web_Server_4D	208	0.01	209	0.01	-0.89
Worldgroup	199	0.01	205	0.01	-3.33
Ultraseek	197	0.01	200	0.01	-1.91
Commerce-Builder	196	0.01	203	0.01	-3.85
4D_WebStar_D	196	0.01	177	0.01	10.28
UserLand	191	0.01	195	0.01	-2.46
Oracle9iAS	177	0.01	176	0.01	0.15
Caudium	171	0.01	172	0.01	-0.99
IBM	170	0.01	158	0.01	7.15
MediaGalaxy	169	0.01	175	0.01	-3.83
Sun_WebServer	156	0.01	172	0.01	-9.68
Jetty	156	0.01	128	0.01	21.37
Powered	153	0.01	160	0.01	-4.77
Microsoft-PWS	153	0.01	161	0.01	-5.36
OpenSA	151	0.01	144	0.01	4.43
NetCache	147	0.01	131	0.01	11.75
MDNServer	146	0.01	143	0.01	1.67
Microsoft-PWS-95	145	0.01	167	0.01	-13.53
MHttpd	144	0.01	148	0.01	-3.11
Internet	138	0.01	142	0.01	-3.22
SilverStream	136	0.01	141	0.01	-3.95
PowerWeb	136	0.01	144	0.01	-5.95
ALEPH	135	0.01	128	0.01	5.03
HomeDoor	129	0.01	0	0.00	N/A
Unknown	125	0.01	125	0.01	-0.41
Oracle_Web_listener3.0.2.0.0	122	0.01	123	0.01	-1.22
HTTP	115	0.01	115	0.01	-0.41
JRun	110	0.01	0	0.00	N/A
Microsoft-Internet-Information-Server	109	0.01	123	0.01	-11.75
David-WebBox	109	0.01	118	0.01	-8.01
ConcentricHost-Ashurbanipal	106	0.01	108	0.01	-2.26
Fujitsu-InfoProvider-Pro	100	0.01	102	0.01	-2.37
CommerceServer400	100	0.01	109	0.01	-8.64

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.