You are viewing an outdated report.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) 57,930,396 hostnames, but only 4,751,587 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	December 2011 Count	December 2011 %	November 2011 Count	November 2011 %	Growth %
Apache	2,819,459	59.34	2,800,115	59.33	0.01
Microsoft-IIS	1,003,721	21.12	1,006,399	21.33	-0.94
null	365,050	7.68	361,361	7.66	0.33
nginx	173,261	3.65	165,056	3.50	4.26
Microsoft-HTTPAPI	65,190	1.37	62,493	1.32	3.61
Apache-Coyote	47,776	1.01	47,339	1.00	0.24
IdeaWebServer	40,444	0.85	39,894	0.85	0.69
Rapidsite	38,386	0.81	39,506	0.84	-3.50
lighttpd	20,563	0.43	20,412	0.43	0.05
LiteSpeed	17,948	0.38	17,392	0.37	2.50
A	15,217	0.32	15,402	0.33	-1.87
Lotus-Domino	11,018	0.23	11,190	0.24	-2.21
BigIP	7,087	0.15	7,077	0.15	-0.54
squid	6,974	0.15	5,503	0.12	25.87
IBM_HTTP_Server	6,734	0.14	6,774	0.14	-1.27
Oracle-Application-Server-10g	3,795	0.08	3,848	0.08	-2.05
Zope	3,738	0.08	3,729	0.08	-0.44
Resin	3,187	0.07	3,231	0.07	-2.03
AkamaiGHost	3,058	0.06	2,925	0.06	3.84
HTTPD	2,372	0.05	2,304	0.05	2.25
Sun-ONE-Web-Server	2,323	0.05	2,380	0.05	-3.06
Zeus	2,279	0.05	2,259	0.05	0.20
Cougar	2,273	0.05	2,296	0.05	-1.67
Netscape-Enterprise	1,937	0.04	2,007	0.04	-4.14
EZproxy	1,792	0.04	1,810	0.04	-1.67
WDaemon	1,718	0.04	1,735	0.04	-1.65
IceWarp	1,569	0.03	1,565	0.03	-0.43
Web	1,496	0.03	1,505	0.03	-1.27
GWS	1,387	0.03	1,404	0.03	-1.88
-	1,177	0.02	1,167	0.02	0.17
III	1,165	0.02	1,176	0.02	-1.61
Apache-AdvancedExtranetServer	1,132	0.02	1,167	0.02	-3.66
Cherokee	1,129	0.02	1,129	0.02	-0.68
Sun-Java-System-Web-Server	1,106	0.02	1,122	0.02	-2.10
Varnish	1,085	0.02	996	0.02	8.19
thttpd	1,083	0.02	1,103	0.02	-2.48
apache	1,043	0.02	1,038	0.02	-0.20
cloudflare-nginx	1,037	0.02	980	0.02	5.10
Oracle	1,022	0.02	1,015	0.02	0.00
httpd	1,002	0.02	1,002	0.02	-0.68
Boa	1,002	0.02	1,001	0.02	-0.58
Apachenginx	974	0.02	937	0.02	3.24
Jetty	889	0.02	892	0.02	-1.01
sffe	887	0.02	821	0.02	7.30
CommuniGatePro	886	0.02	889	0.02	-1.02
cpsrvd	872	0.02	862	0.02	0.47
Sun	773	0.02	793	0.02	-3.18
Nginx	748	0.02	739	0.02	0.53
WebServerX	745	0.02	737	0.02	0.40
WWW	735	0.02	749	0.02	-2.54
ListManagerWeb	730	0.02	739	0.02	-1.89
AnWeb	716	0.02	737	0.02	-3.51
Rumpus	707	0.01	713	0.02	-1.52
xServers	686	0.01	562	0.01	21.23
NOYB	680	0.01	700	0.01	-3.52
Ipswitch-IMail	615	0.01	621	0.01	-1.64
Bomgar	613	0.01	616	0.01	-1.16
IBM_HTTP_SERVER	583	0.01	610	0.01	-5.08
WebtoB	581	0.01	597	0.01	-3.34
PowerSchool	525	0.01	686	0.01	-23.99
4D_WebStar_D	517	0.01	551	0.01	-6.81
redir-httpd	512	0.01	513	0.01	-0.87
WebSTAR	480	0.01	485	0.01	-1.70
FileMakerPro	480	0.01	495	0.01	-3.69
BIG-IP	470	0.01	464	0.01	0.60
FC	456	0.01	421	0.01	7.58
WebServer	453	0.01	455	0.01	-1.12
Server	449	0.01	435	0.01	2.52
GlassFish	440	0.01	417	0.01	4.80
AOLserver	409	0.01	419	0.01	-3.05
WebLogic	405	0.01	417	0.01	-3.54
Abyss	397	0.01	406	0.01	-2.88
EdgePrism	394	0.01	382	0.01	2.44
WebSphere	373	0.01	375	0.01	-1.21
DinaHTTPd	373	0.01	341	0.01	8.64
WebSite	360	0.01	361	0.01	-0.96
Unknown	347	0.01	322	0.01	7.03
WebSitePro	335	0.01	345	0.01	-3.56
JRun	322	0.01	330	0.01	-3.09
Secured	316	0.01	322	0.01	-2.53
SAP	313	0.01	315	0.01	-1.31
Indy	309	0.01	310	0.01	-1.00
Roxen	299	0.01	305	0.01	-2.63
OpenCms	297	0.01	291	0.01	1.37
4D_WebSTAR_S	288	0.01	292	0.01	-2.04
Oracle-iPlanet-Web-Server	274	0.01	245	0.01	11.08
CloudFront	274	0.01	1,130	0.02	-75.92
SW	272	0.01	276	0.01	-2.12
RomPager	268	0.01	295	0.01	-9.77
Power	257	0.01	261	0.01	-2.20
Oracle-Application-Server-11g	253	0.01	235	0.00	6.93
IIS	253	0.01	244	0.01	2.98
SAMBAR	249	0.01	249	0.01	-0.68
WS	243	0.01	237	0.01	1.83
Microsoft	242	0.01	0	0.00	N/A
""	233	0.00	256	0.01	-9.60
WebSEAL	219	0.00	222	0.00	-2.02
NetBox	218	0.00	0	0.00	N/A
unknown	217	0.00	214	0.00	0.71
PWS	212	0.00	231	0.00	-8.85

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.