You are viewing an outdated report.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) 11,191,235 hostnames, but only 2,236,929 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	July 2003 Count	July 2003 %	June 2003 Count	June 2003 %	Growth %
Apache	1,179,269	52.72	1,155,568	52.61	0.21
Microsoft-IIS	778,830	34.82	766,273	34.89	-0.20
Rapidsite	74,676	3.34	73,415	3.34	-0.12
null	37,257	1.67	35,851	1.63	2.05
Netscape-Enterprise	32,489	1.45	32,607	1.48	-2.16
Lotus-Domino	15,601	0.70	15,417	0.70	-0.63
Apache-AdvancedExtranetServer	8,310	0.37	8,113	0.37	0.58
A	7,348	0.33	7,024	0.32	2.72
WebSTAR	6,769	0.30	6,829	0.31	-2.67
WebSitePro	6,393	0.29	6,479	0.29	-3.11
Zeus	6,269	0.28	6,108	0.28	0.78
WN	5,103	0.23	5,092	0.23	-1.59
Stronghold	4,837	0.22	4,814	0.22	-1.34
IdeaWebServer	4,064	0.18	3,997	0.18	-0.16
NetWare-Enterprise-Web-Server	3,121	0.14	3,228	0.15	-5.06
Ipswitch-IMail	2,873	0.13	2,764	0.13	2.07
WebSite	2,820	0.13	2,703	0.12	2.44
Netscape-FastTrack	2,544	0.11	2,613	0.12	-4.40
IBM_HTTP_Server	2,198	0.10	2,196	0.10	-1.72
FileMakerPro	2,103	0.09	2,088	0.10	-1.10
IBM_HTTP_SERVER	1,803	0.08	1,689	0.08	4.82
Oracle	1,729	0.08	1,690	0.08	0.46
Zope	1,682	0.08	1,615	0.07	2.27
NCSA	1,583	0.07	1,632	0.07	-4.75
IBM-HTTP-Server	1,558	0.07	1,525	0.07	0.32
AppleShareIP	1,366	0.06	1,441	0.07	-6.92
FirstClass	1,239	0.06	1,238	0.06	-1.73
WebLogic	965	0.04	941	0.04	0.70
Resin	959	0.04	921	0.04	2.25
WebServer	899	0.04	840	0.04	5.09
Squid	886	0.04	890	0.04	-2.25
4D_WebSTAR_S	872	0.04	842	0.04	1.69
SAMBAR	835	0.04	840	0.04	-2.39
HPWB	788	0.04	817	0.04	-5.29
Roxen·Challenger	725	0.03	733	0.03	-2.88
Xitami	697	0.03	701	0.03	-2.37
Oracle_Web_Listener	685	0.03	719	0.03	-6.45
Oracle9iAS	673	0.03	604	0.03	9.41
AOLserver	659	0.03	634	0.03	2.07
thttpd	653	0.03	603	0.03	6.34
CERN	653	0.03	667	0.03	-3.87
WDaemon	620	0.03	602	0.03	1.13
Cougar	615	0.03	577	0.03	4.66
CommuniGatePro	608	0.03	572	0.03	4.37
Jetty	606	0.03	546	0.02	8.98
Lasso	592	0.03	589	0.03	-1.31
AnWeb	576	0.03	530	0.02	6.72
OSU	566	0.03	575	0.03	-3.34
Netscape-Communications	561	0.03	577	0.03	-4.53
Roxen	556	0.02	564	0.03	-3.20
httpd+ssl	548	0.02	517	0.02	4.08
Orion	540	0.02	525	0.02	1.00
WWW	501	0.02	492	0.02	-0.01
Boa	483	0.02	447	0.02	6.10
Statistics	457	0.02	449	0.02	-0.06
Novell-HTTP-Server	451	0.02	482	0.02	-8.12
MACOS_Personal_Websharing	437	0.02	443	0.02	-3.14
Domino-Go-Webserver	427	0.02	434	0.02	-3.39
Web	418	0.02	400	0.02	2.61
OmniHTTPd	388	0.02	372	0.02	2.42
Inktomi	358	0.02	357	0.02	-1.53
4D_WebStar_D	346	0.02	342	0.02	-0.66
squid	328	0.01	296	0.01	8.81
IceWarp	293	0.01	266	0.01	8.16
OpenSA	264	0.01	262	0.01	-1.06
Red	259	0.01	259	0.01	-1.81
QuidProQuo	252	0.01	253	0.01	-2.19
JavaWebServer	229	0.01	231	0.01	-2.66
Netscape-Commerce	220	0.01	223	0.01	-3.13
UserLand	218	0.01	226	0.01	-5.28
oXeo	216	0.01	181	0.01	17.18
Purveyor	212	0.01	201	0.01	3.57
MacHTTP	208	0.01	214	0.01	-4.56
Web_Server_4D	204	0.01	199	0.01	0.66
Apache-NeoNova	204	0.01	257	0.01	-22.06
Netrox-Apache	202	0.01	197	0.01	0.69
NaviServer	196	0.01	194	0.01	-0.79
mod_perl	192	0.01	197	0.01	-4.30
Ultraseek	189	0.01	185	0.01	0.32
MHttpd	189	0.01	188	0.01	-1.28
Caudium	180	0.01	189	0.01	-6.48
EZproxy	175	0.01	159	0.01	8.08
NetCache	173	0.01	159	0.01	6.84
IBM	173	0.01	167	0.01	1.72
HP	172	0.01	170	0.01	-0.65
JRun	168	0.01	167	0.01	-1.22
Internet	168	0.01	163	0.01	1.21
Worldgroup	166	0.01	178	0.01	-8.43
MDNServer	166	0.01	162	0.01	0.62
HP-UX_Apache-based_Web_Server	156	0.01	136	0.01	12.63
Unknown	153	0.01	146	0.01	2.90
DeleGate	151	0.01	138	0.01	7.44
Tomcat	148	0.01	158	0.01	-8.02
Wapapi	139	0.01	138	0.01	-1.09
HTTP	131	0.01	131	0.01	-1.81
Commerce-Builder	130	0.01	132	0.01	-3.29
JARING	124	0.01	0	0.00	N/A
LiveStats	123	0.01	0	0.00	N/A
cpaneld	122	0.01	0	0.00	N/A
Sun_WebServer	122	0.01	126	0.01	-4.92

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.