You are viewing an outdated report. The latest version of this report was published on October 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) 10,432,028 hostnames, but only 2,199,629 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 2003 Count	May 2003 %	April 2003 Count	April 2003 %	Growth %
Apache	1,154,068	52.47	1,132,648	52.46	0.02
Microsoft-IIS	767,845	34.91	754,043	34.92	-0.04
Rapidsite	73,781	3.35	71,839	3.33	0.81
null	35,228	1.60	34,205	1.58	1.10
Netscape-Enterprise	33,503	1.52	33,445	1.55	-1.67
Lotus-Domino	15,463	0.70	15,216	0.70	-0.25
Apache-AdvancedExtranetServer	8,214	0.37	7,951	0.37	1.41
WebSTAR	7,182	0.33	7,243	0.34	-2.67
A	6,953	0.32	6,719	0.31	1.58
WebSitePro	6,814	0.31	7,005	0.32	-4.52
Zeus	6,131	0.28	6,013	0.28	0.09
WN	5,247	0.24	5,264	0.24	-2.16
Stronghold	4,931	0.22	5,011	0.23	-3.41
IdeaWebServer	4,003	0.18	3,943	0.18	-0.35
NetWare-Enterprise-Web-Server	3,331	0.15	3,302	0.15	-0.98
Netscape-FastTrack	2,778	0.13	2,817	0.13	-3.20
Ipswitch-IMail	2,735	0.12	2,630	0.12	2.08
WebSite	2,679	0.12	2,598	0.12	1.22
IBM_HTTP_Server	2,228	0.10	2,206	0.10	-0.86
FileMakerPro	2,177	0.10	2,108	0.10	1.37
NCSA	1,734	0.08	1,790	0.08	-4.91
Oracle	1,679	0.08	1,616	0.07	1.99
IBM_HTTP_SERVER	1,597	0.07	1,510	0.07	3.82
Squid	1,592	0.07	1,229	0.06	27.15
IBM-HTTP-Server	1,547	0.07	1,576	0.07	-3.65
Zope	1,543	0.07	1,475	0.07	2.69
AppleShareIP	1,495	0.07	1,508	0.07	-2.69
FirstClass	1,231	0.06	1,195	0.06	1.12
WebLogic	928	0.04	876	0.04	3.99
Resin	906	0.04	855	0.04	4.02
Roxen·Challenger	873	0.04	991	0.05	-13.53
HPWB	865	0.04	919	0.04	-7.61
SAMBAR	837	0.04	827	0.04	-0.65
4D_WebSTAR_S	782	0.04	725	0.03	5.88
WebServer	758	0.03	681	0.03	9.26
Oracle_Web_Listener	754	0.03	769	0.04	-3.75
Xitami	737	0.03	738	0.03	-1.97
CERN	721	0.03	726	0.03	-2.51
AOLserver	642	0.03	614	0.03	2.64
thttpd	611	0.03	595	0.03	0.80
Lasso	603	0.03	590	0.03	0.32
Netscape-Communications	592	0.03	599	0.03	-2.99
WDaemon	591	0.03	570	0.03	1.78
OSU	589	0.03	588	0.03	-1.67
Oracle9iAS	577	0.03	520	0.02	8.92
Cougar	570	0.03	551	0.03	1.55
CommuniGatePro	569	0.03	552	0.03	1.18
Roxen	564	0.03	540	0.03	2.52
Jetty	522	0.02	458	0.02	11.88
AnWeb	516	0.02	499	0.02	1.51
Novell-HTTP-Server	510	0.02	510	0.02	-1.84
Orion	508	0.02	491	0.02	1.56
WWW	485	0.02	459	0.02	3.72
httpd+ssl	476	0.02	456	0.02	2.47
Statistics	470	0.02	476	0.02	-3.08
Boa	468	0.02	455	0.02	0.97
MACOS_Personal_Websharing	466	0.02	456	0.02	0.31
Domino-Go-Webserver	452	0.02	450	0.02	-1.40
Web	416	0.02	416	0.02	-1.84
Patchy	392	0.02	391	0.02	-1.59
OmniHTTPd	392	0.02	375	0.02	2.61
Inktomi	367	0.02	369	0.02	-2.37
4D_WebStar_D	345	0.02	333	0.02	1.70
Apache-NeoNova	279	0.01	279	0.01	-1.84
Red	271	0.01	278	0.01	-4.31
OpenSA	269	0.01	262	0.01	0.78
QuidProQuo	265	0.01	267	0.01	-2.57
IceWarp	241	0.01	206	0.01	14.84
JavaWebServer	238	0.01	250	0.01	-6.55
squid	236	0.01	224	0.01	3.42
Netscape-Commerce	235	0.01	230	0.01	0.30
UserLand	231	0.01	231	0.01	-1.84
MacHTTP	221	0.01	228	0.01	-4.85
Purveyor	218	0.01	216	0.01	-0.93
Caudium	212	0.01	208	0.01	0.05
mod_perl	211	0.01	219	0.01	-5.42
Web_Server_4D	206	0.01	203	0.01	-0.39
Netrox-Apache	197	0.01	198	0.01	-2.33
NaviServer	197	0.01	197	0.01	-1.84
MHttpd	190	0.01	186	0.01	0.27
Ultraseek	175	0.01	173	0.01	-0.70
Worldgroup	172	0.01	176	0.01	-4.07
IBM	172	0.01	170	0.01	-0.68
oXeo	166	0.01	151	0.01	7.91
Internet	166	0.01	165	0.01	-1.24
MDNServer	160	0.01	152	0.01	3.33
JRun	160	0.01	158	0.01	-0.60
HP	158	0.01	153	0.01	1.37
Tomcat	155	0.01	144	0.01	5.66
NetCache	153	0.01	149	0.01	0.80
Unknown	148	0.01	149	0.01	-2.50
EZproxy	143	0.01	125	0.01	12.30
DeleGate	138	0.01	132	0.01	2.62
Commerce-Builder	137	0.01	139	0.01	-3.25
CQhost	132	0.01	130	0.01	-0.33
Wapapi	131	0.01	130	0.01	-1.08
Sun_WebServer	129	0.01	137	0.01	-7.57
HTTP	129	0.01	0	0.00	N/A
HP-UX_Apache-based_Web_Server	127	0.01	140	0.01	-10.95
Fujitsu-InfoProvider-Pro	125	0.01	120	0.01	2.25

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.