You are viewing an outdated report. The latest version of this report was published on May 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) 17,476,276 hostnames, but only 2,795,639 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	February 2006 Count	February 2006 %	January 2006 Count	January 2006 %	Growth %
Apache	1,563,364	55.92	1,544,828	55.84	0.15
Microsoft-IIS	871,921	31.19	866,629	31.32	-0.43
null	111,459	3.99	108,304	3.91	1.84
Rapidsite	69,963	2.50	69,023	2.49	0.31
Netscape-Enterprise	17,029	0.61	17,651	0.64	-4.53
Lotus-Domino	15,162	0.54	15,155	0.55	-0.99
A	11,611	0.42	11,351	0.41	1.23
Apache-Coyote	9,820	0.35	9,295	0.34	4.55
Apache-AdvancedExtranetServer	8,808	0.32	9,198	0.33	-5.23
IdeaWebServer	7,551	0.27	7,275	0.26	2.72
Zeus	5,283	0.19	5,316	0.19	-1.65
Sun-ONE-Web-Server	3,743	0.13	3,630	0.13	2.04
Zope	3,487	0.12	3,451	0.12	-0.01
Ipswitch-IMail	3,342	0.12	3,396	0.12	-2.61
IBM_HTTP_SERVER	2,911	0.10	2,879	0.10	0.06
WebSTAR	2,905	0.10	3,006	0.11	-4.36
NOYB	2,904	0.10	2,641	0.10	8.82
WN	2,854	0.10	2,898	0.10	-2.54
IBM_HTTP_Server	2,725	0.10	2,678	0.10	0.70
WebServer	2,681	0.10	2,599	0.09	2.08
WebSitePro	2,388	0.09	2,490	0.09	-5.09
Resin	2,382	0.09	2,332	0.08	1.08
WebSite	1,969	0.07	2,021	0.07	-3.59
Oracle	1,920	0.07	1,914	0.07	-0.73
lighttpd	1,858	0.07	1,619	0.06	13.57
squid	1,825	0.07	1,762	0.06	2.50
FileMakerPro	1,681	0.06	1,710	0.06	-2.72
nginx	1,606	0.06	1,553	0.06	2.34
Oracle-Application-Server-10g	1,589	0.06	1,489	0.05	5.61
Stronghold	1,455	0.05	1,476	0.05	-2.45
4D_WebSTAR_S	1,440	0.05	1,457	0.05	-2.19
Jetty	1,431	0.05	1,388	0.05	2.03
WebLogic	1,285	0.05	1,291	0.05	-1.50
FirstClass	1,259	0.05	1,406	0.05	-11.39
Cougar	1,247	0.04	1,215	0.04	1.57
NetWare-Enterprise-Web-Server	1,218	0.04	1,262	0.05	-4.49
IceWarp	1,155	0.04	1,104	0.04	3.53
WDaemon	1,138	0.04	1,111	0.04	1.37
thttpd	1,065	0.04	1,026	0.04	2.72
Boa	1,029	0.04	1,003	0.04	1.53
Netscape-FastTrack	940	0.03	959	0.03	-3.00
III	936	0.03	932	0.03	-0.61
httpd+ssl	923	0.03	928	0.03	-1.57
CommuniGatePro	914	0.03	886	0.03	2.09
AnWeb	874	0.03	894	0.03	-3.25
Oracle9iAS	859	0.03	911	0.03	-6.69
AOLserver	752	0.03	759	0.03	-1.95
Web	732	0.03	732	0.03	-1.04
IBM-HTTP-Server	722	0.03	748	0.03	-4.48
SAMBAR	659	0.02	670	0.02	-2.66
EZproxy	600	0.02	581	0.02	2.20
NCSA	588	0.02	607	0.02	-4.14
Orion	562	0.02	559	0.02	-0.51
4D_WebStar_D	527	0.02	518	0.02	0.68
WebSphere	524	0.02	510	0.02	1.68
AppleShareIP	514	0.02	531	0.02	-4.21
DeleGate	503	0.02	504	0.02	-1.24
redir-httpd	497	0.02	499	0.02	-1.44
AkamaiGHost	493	0.02	433	0.02	12.67
cpsrvd	485	0.02	465	0.02	3.22
NetCache	476	0.02	462	0.02	1.96
BIG-IP	436	0.02	381	0.01	13.25
Xitami	429	0.02	456	0.02	-6.90
Roxen	425	0.02	418	0.02	0.62
GWS	423	0.02	387	0.01	8.17
Simple,	411	0.01	387	0.01	5.10
WebtoB	402	0.01	387	0.01	2.80
OSU	401	0.01	405	0.01	-2.02
Ultraseek	382	0.01	378	0.01	0.01
PowerSchool	318	0.01	276	0.01	14.02
HPWB	312	0.01	314	0.01	-1.67
Blocked	312	0.01	328	0.01	-5.87
Apache-NeoNova	296	0.01	295	0.01	-0.70
Abyss	287	0.01	288	0.01	-1.38
Tcl-Webserver	249	0.01	239	0.01	3.10
UserLand	244	0.01	577	0.02	-58.15
Squid	237	0.01	240	0.01	-2.28
Roxen·Challenger	233	0.01	241	0.01	-4.32
Oracle_Web_Listener	228	0.01	232	0.01	-2.75
OpenSA	228	0.01	218	0.01	3.50
JRun	225	0.01	215	0.01	3.56
CERN	219	0.01	230	0.01	-5.77
kucci	213	0.01	210	0.01	0.37
Webserver	206	0.01	202	0.01	0.92
eSoft	203	0.01	203	0.01	-1.04
Statistics	198	0.01	206	0.01	-4.88
NAB	197	0.01	0	0.00	N/A
Powered	196	0.01	194	0.01	-0.02
Polaris	193	0.01	191	0.01	-0.00
Indy	192	0.01	181	0.01	4.98
Jeus	179	0.01	174	0.01	1.80
httpd	173	0.01	178	0.01	-3.82
Caudium	170	0.01	162	0.01	3.85
ListManagerWeb	166	0.01	155	0.01	5.98
IBM	165	0.01	168	0.01	-2.81
Domino-Go-Webserver	165	0.01	169	0.01	-3.38
Lasso	159	0.01	158	0.01	-0.41
Inktomi	158	0.01	160	0.01	-2.28
""	158	0.01	153	0.01	2.20
Red	156	0.01	158	0.01	-2.29

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.