You are viewing an outdated report. The latest version of this report was published on November 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) 9,980,073 hostnames, but only 2,159,180 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 2003 Count	April 2003 %	March 2003 Count	March 2003 %	Growth %
Apache	1,132,648	52.46	1,116,592	52.25	0.39
Microsoft-IIS	754,043	34.92	750,274	35.11	-0.53
Rapidsite	71,839	3.33	69,979	3.27	1.60
null	34,205	1.58	33,500	1.57	1.05
Netscape-Enterprise	33,445	1.55	34,584	1.62	-4.29
Lotus-Domino	15,216	0.70	15,120	0.71	-0.40
Apache-AdvancedExtranetServer	7,951	0.37	7,766	0.36	1.33
WebSTAR	7,243	0.34	7,446	0.35	-3.73
WebSitePro	7,005	0.32	7,323	0.34	-5.33
A	6,719	0.31	6,448	0.30	3.13
Zeus	6,013	0.28	6,014	0.28	-1.05
WN	5,264	0.24	5,375	0.25	-3.07
Stronghold	5,011	0.23	5,191	0.24	-4.46
IdeaWebServer	3,943	0.18	3,921	0.18	-0.47
NetWare-Enterprise-Web-Server	3,302	0.15	3,291	0.15	-0.70
Netscape-FastTrack	2,817	0.13	2,908	0.14	-4.13
Ipswitch-IMail	2,630	0.12	2,501	0.12	4.08
WebSite	2,598	0.12	2,590	0.12	-0.72
IBM_HTTP_Server	2,206	0.10	2,274	0.11	-3.99
FileMakerPro	2,108	0.10	2,101	0.10	-0.70
NCSA	1,790	0.08	1,891	0.09	-6.31
Oracle	1,616	0.07	1,555	0.07	2.85
IBM-HTTP-Server	1,576	0.07	1,583	0.07	-1.47
IBM_HTTP_SERVER	1,510	0.07	1,411	0.07	5.92
AppleShareIP	1,508	0.07	1,558	0.07	-4.20
Zope	1,475	0.07	1,394	0.07	4.72
Squid	1,229	0.06	887	0.04	37.13
FirstClass	1,195	0.06	1,185	0.06	-0.19
Roxen·Challenger	991	0.05	1,111	0.05	-11.72
HPWB	919	0.04	950	0.04	-4.26
WebLogic	876	0.04	839	0.04	3.34
Resin	855	0.04	786	0.04	7.66
SAMBAR	827	0.04	819	0.04	-0.06
Oracle_Web_Listener	769	0.04	807	0.04	-5.69
Xitami	738	0.03	747	0.03	-2.22
CERN	726	0.03	781	0.04	-8.00
4D_WebSTAR_S	725	0.03	666	0.03	7.74
WebServer	681	0.03	618	0.03	9.06
AOLserver	614	0.03	602	0.03	0.94
Netscape-Communications	599	0.03	614	0.03	-3.45
thttpd	595	0.03	563	0.03	4.60
Lasso	590	0.03	580	0.03	0.68
OSU	588	0.03	588	0.03	-1.03
WDaemon	570	0.03	527	0.02	7.05
CommuniGatePro	552	0.03	519	0.02	5.26
Cougar	551	0.03	513	0.02	6.30
Roxen	540	0.03	534	0.02	0.08
Oracle9iAS	520	0.02	486	0.02	5.90
Novell-HTTP-Server	510	0.02	529	0.02	-4.58
AnWeb	499	0.02	472	0.02	4.63
Orion	491	0.02	480	0.02	1.24
Statistics	476	0.02	468	0.02	0.66
WWW	459	0.02	456	0.02	-0.38
Jetty	458	0.02	388	0.02	16.83
httpd+ssl	456	0.02	430	0.02	4.96
MACOS_Personal_Websharing	456	0.02	463	0.02	-2.53
Boa	455	0.02	416	0.02	8.25
Domino-Go-Webserver	450	0.02	476	0.02	-6.43
Web	416	0.02	422	0.02	-2.44
Patchy	391	0.02	393	0.02	-1.53
OmniHTTPd	375	0.02	370	0.02	0.31
Inktomi	369	0.02	385	0.02	-5.14
4D_WebStar_D	333	0.02	326	0.02	1.10
Apache-NeoNova	279	0.01	277	0.01	-0.31
Red	278	0.01	279	0.01	-1.38
QuidProQuo	267	0.01	269	0.01	-1.76
OpenSA	262	0.01	250	0.01	3.72
JavaWebServer	250	0.01	252	0.01	-1.81
UserLand	231	0.01	219	0.01	4.39
Netscape-Commerce	230	0.01	246	0.01	-7.47
MacHTTP	228	0.01	240	0.01	-5.98
squid	224	0.01	278	0.01	-20.25
mod_perl	219	0.01	227	0.01	-4.52
Purveyor	216	0.01	220	0.01	-2.83
Caudium	208	0.01	202	0.01	1.91
IceWarp	206	0.01	192	0.01	6.19
Web_Server_4D	203	0.01	206	0.01	-2.47
Netrox-Apache	198	0.01	204	0.01	-3.94
NaviServer	197	0.01	212	0.01	-8.03
MHttpd	186	0.01	183	0.01	0.59
Worldgroup	176	0.01	180	0.01	-3.23
Ultraseek	173	0.01	166	0.01	3.14
IBM	170	0.01	169	0.01	-0.44
Internet	165	0.01	168	0.01	-2.80
JRun	158	0.01	152	0.01	2.88
HP	153	0.01	150	0.01	0.95
MDNServer	152	0.01	155	0.01	-2.94
oXeo	151	0.01	135	0.01	10.70
Unknown	149	0.01	149	0.01	-1.03
NetCache	149	0.01	145	0.01	1.70
Tomcat	144	0.01	136	0.01	4.79
HP-UX_Apache-based_Web_Server	140	0.01	0	0.00	N/A
Commerce-Builder	139	0.01	156	0.01	-11.81
Sun_WebServer	137	0.01	140	0.01	-3.15
DeleGate	132	0.01	0	0.00	N/A
Wapapi	130	0.01	125	0.01	2.93
CQhost	130	0.01	0	0.00	N/A
EZproxy	125	0.01	0	0.00	N/A
Powered	123	0.01	138	0.01	-11.79
Fujitsu-InfoProvider-Pro	120	0.01	119	0.01	-0.20

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.