You are viewing an outdated report.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) 25,751,233 hostnames, but only 3,268,404 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	October 2007 Count	October 2007 %	September 2007 Count	September 2007 %	Growth %
Apache	1,887,525	57.75	1,867,402	57.69	0.11
Microsoft-IIS	917,931	28.08	912,465	28.19	-0.37
null	190,064	5.82	187,285	5.79	0.51
Rapidsite	66,802	2.04	66,418	2.05	-0.39
Apache-Coyote	19,788	0.61	19,294	0.60	1.57
A	14,944	0.46	14,763	0.46	0.25
IdeaWebServer	14,405	0.44	14,025	0.43	1.72
Lotus-Domino	13,998	0.43	14,057	0.43	-1.38
Netscape-Enterprise	11,643	0.36	11,702	0.36	-1.46
lighttpd	7,038	0.22	6,675	0.21	4.42
nginx	6,816	0.21	6,358	0.20	6.17
Apache-AdvancedExtranetServer	4,810	0.15	4,898	0.15	-2.74
Zeus	4,554	0.14	4,562	0.14	-1.13
IBM_HTTP_Server	4,416	0.14	4,386	0.14	-0.28
Zope	4,290	0.13	4,302	0.13	-1.24
WebServer	4,002	0.12	3,872	0.12	2.36
Sun-ONE-Web-Server	3,897	0.12	3,884	0.12	-0.63
NOYB	3,427	0.10	3,353	0.10	1.22
Resin	3,095	0.09	3,041	0.09	0.80
Oracle-Application-Server-10g	3,020	0.09	2,996	0.09	-0.17
squid	2,959	0.09	2,985	0.09	-1.82
IBM_HTTP_SERVER	2,127	0.07	2,137	0.07	-1.42
Ipswitch-IMail	1,924	0.06	1,945	0.06	-2.03
Cougar	1,889	0.06	1,847	0.06	1.29
WebSTAR	1,742	0.05	1,746	0.05	-1.19
Jetty	1,551	0.05	1,543	0.05	-0.45
IceWarp	1,497	0.05	1,481	0.05	0.11
Oracle	1,485	0.05	1,503	0.05	-2.15
WebServerX	1,469	0.04	1,437	0.04	1.24
WebLogic	1,446	0.04	1,431	0.04	0.08
GWS	1,399	0.04	1,355	0.04	2.26
WDaemon	1,398	0.04	1,372	0.04	0.92
BIG-IP	1,382	0.04	1,341	0.04	2.07
FileMakerPro	1,236	0.04	1,248	0.04	-1.91
WebSitePro	1,185	0.04	1,211	0.04	-3.09
WebSite	1,169	0.04	1,169	0.04	-0.96
Boa	1,159	0.04	1,174	0.04	-2.23
AnWeb	1,050	0.03	1,052	0.03	-1.15
III	1,015	0.03	1,018	0.03	-1.25
thttpd	1,000	0.03	1,012	0.03	-2.14
CommuniGatePro	992	0.03	987	0.03	-0.46
4D_WebSTAR_S	989	0.03	992	0.03	-1.26
httpd+ssl	859	0.03	870	0.03	-2.21
EZproxy	855	0.03	836	0.03	1.29
PowerSchool	792	0.02	771	0.02	1.74
AkamaiGHost	788	0.02	1,022	0.03	-23.64
AOLserver	733	0.02	754	0.02	-3.72
Web	725	0.02	719	0.02	-0.13
LiteSpeed	720	0.02	705	0.02	1.15
Stronghold	642	0.02	664	0.02	-4.24
EdgePrism	627	0.02	607	0.02	2.30
cpsrvd	626	0.02	614	0.02	0.97
4D_WebStar_D	620	0.02	624	0.02	-1.60
WebtoB	600	0.02	589	0.02	0.89
SAMBAR	546	0.02	559	0.02	-3.26
DeleGate	544	0.02	541	0.02	-0.41
NetWare-Enterprise-Web-Server	540	0.02	540	0.02	-0.96
Oracle9iAS	538	0.02	546	0.02	-2.41
NetCache	516	0.02	513	0.02	-0.38
redir-httpd	506	0.02	507	0.02	-1.16
Orion	446	0.01	451	0.01	-2.06
Netscape-FastTrack	444	0.01	454	0.01	-3.14
Roxen	435	0.01	434	0.01	-0.73
ListManagerWeb	429	0.01	430	0.01	-1.19
WebSphere	405	0.01	388	0.01	3.38
NCSA	393	0.01	381	0.01	2.16
IBM-HTTP-Server	380	0.01	387	0.01	-2.75
Abyss	376	0.01	377	0.01	-1.22
httpd	365	0.01	337	0.01	7.27
WWW	365	0.01	360	0.01	0.41
Ultraseek	356	0.01	364	0.01	-3.14
Acenet	353	0.01	336	0.01	4.05
Blocked	334	0.01	0	0.00	N/A
Xitami	333	0.01	335	0.01	-1.55
OSU	332	0.01	337	0.01	-2.43
Power	328	0.01	330	0.01	-1.56
ENIAC	327	0.01	290	0.01	11.67
""	302	0.01	302	0.01	-0.96
Nost	301	0.01	298	0.01	0.04
JRun	301	0.01	289	0.01	3.15
NS_6.1	295	0.01	271	0.01	7.81
Sun-Java-System-Web-Server	287	0.01	277	0.01	2.61
FirstClass	275	0.01	281	0.01	-3.08
Secured	265	0.01	269	0.01	-2.43
Microsoft-HTTPAPI	262	0.01	254	0.01	2.16
Indy	254	0.01	252	0.01	-0.17
AppleShareIP	241	0.01	247	0.01	-3.37
IIS	237	0.01	230	0.01	2.05
Server	226	0.01	218	0.01	2.67
Jeus	221	0.01	221	0.01	-0.96
gws	220	0.01	203	0.01	7.33
Mittwald	210	0.01	202	0.01	2.96
Polaris	197	0.01	196	0.01	-0.46
UserLand	194	0.01	191	0.01	0.59
Tcl-Webserver	192	0.01	189	0.01	0.61
FJapache	185	0.01	182	0.01	0.67
BigIP	184	0.01	0	0.00	N/A
Webserver	183	0.01	182	0.01	-0.42
Fujitsu-InfoProvider-Pro	180	0.01	174	0.01	2.45
Apache-NeoNova	178	0.01	174	0.01	1.32

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.