You are viewing an outdated report.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) 57,397,620 hostnames, but only 4,719,275 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	November 2011 Count	November 2011 %	October 2011 Count	October 2011 %	Growth %
Apache	2,800,115	59.33	2,779,000	59.20	0.22
Microsoft-IIS	1,006,399	21.33	1,009,505	21.51	-0.84
null	361,361	7.66	365,038	7.78	-1.54
nginx	165,056	3.50	157,906	3.36	3.97
Microsoft-HTTPAPI	62,493	1.32	59,983	1.28	3.63
Apache-Coyote	47,339	1.00	47,041	1.00	0.10
IdeaWebServer	39,894	0.85	39,506	0.84	0.44
Rapidsite	39,506	0.84	40,654	0.87	-3.34
lighttpd	20,412	0.43	20,280	0.43	0.11
LiteSpeed	17,392	0.37	16,717	0.36	3.48
A	15,402	0.33	15,582	0.33	-1.68
Lotus-Domino	11,190	0.24	11,206	0.24	-0.68
BigIP	7,077	0.15	6,917	0.15	1.77
IBM_HTTP_Server	6,774	0.14	6,857	0.15	-1.74
squid	5,503	0.12	5,357	0.11	2.18
Oracle-Application-Server-10g	3,848	0.08	3,859	0.08	-0.82
Zope	3,729	0.08	3,759	0.08	-1.33
Resin	3,231	0.07	3,240	0.07	-0.81
AkamaiGHost	2,925	0.06	3,014	0.06	-3.47
Sun-ONE-Web-Server	2,380	0.05	2,400	0.05	-1.36
HTTPD	2,304	0.05	2,195	0.05	4.40
Cougar	2,296	0.05	2,281	0.05	0.12
Zeus	2,259	0.05	2,417	0.05	-7.04
Netscape-Enterprise	2,007	0.04	2,100	0.04	-4.94
EZproxy	1,810	0.04	1,807	0.04	-0.37
WDaemon	1,735	0.04	1,750	0.04	-1.39
IceWarp	1,565	0.03	1,569	0.03	-0.79
Web	1,505	0.03	1,163	0.02	28.72
GWS	1,404	0.03	1,426	0.03	-2.07
III	1,176	0.02	1,170	0.02	-0.02
Apache-AdvancedExtranetServer	1,167	0.02	1,203	0.03	-3.51
-	1,167	0.02	1,053	0.02	10.23
CloudFront	1,130	0.02	408	0.01	175.48
Cherokee	1,129	0.02	1,126	0.02	-0.27
Sun-Java-System-Web-Server	1,122	0.02	1,156	0.02	-3.46
thttpd	1,103	0.02	1,124	0.02	-2.39
apache	1,038	0.02	1,013	0.02	1.92
Oracle	1,015	0.02	1,028	0.02	-1.79
httpd	1,002	0.02	988	0.02	0.87
Boa	1,001	0.02	1,028	0.02	-3.15
Varnish	996	0.02	1,112	0.02	-10.91
cloudflare-nginx	980	0.02	277	0.01	251.90
Apachenginx	937	0.02	906	0.02	2.87
Jetty	892	0.02	934	0.02	-5.01
CommuniGatePro	889	0.02	894	0.02	-1.09
cpsrvd	862	0.02	854	0.02	0.40
sffe	821	0.02	629	0.01	29.83
Sun	793	0.02	795	0.02	-0.78
WWW	749	0.02	761	0.02	-2.10
Nginx	739	0.02	743	0.02	-1.07
ListManagerWeb	739	0.02	758	0.02	-3.03
WebServerX	737	0.02	753	0.02	-2.65
AnWeb	737	0.02	729	0.02	0.56
Rumpus	713	0.02	709	0.02	0.03
NOYB	700	0.01	713	0.02	-2.35
PowerSchool	686	0.01	781	0.02	-12.63
Ipswitch-IMail	621	0.01	637	0.01	-3.03
Bomgar	616	0.01	601	0.01	1.95
IBM_HTTP_SERVER	610	0.01	616	0.01	-1.50
WebtoB	597	0.01	609	0.01	-2.49
xServers	562	0.01	772	0.02	-27.59
4D_WebStar_D	551	0.01	565	0.01	-3.00
redir-httpd	513	0.01	506	0.01	0.84
FileMakerPro	495	0.01	507	0.01	-2.89
WebSTAR	485	0.01	500	0.01	-3.52
BIG-IP	464	0.01	466	0.01	-0.96
DeleGate	457	0.01	456	0.01	-0.32
WebServer	455	0.01	449	0.01	0.79
Server	435	0.01	431	0.01	0.39
FC	421	0.01	448	0.01	-6.53
AOLserver	419	0.01	427	0.01	-2.40
WebLogic	417	0.01	447	0.01	-7.21
GlassFish	417	0.01	396	0.01	4.74
Abyss	406	0.01	398	0.01	1.46
EdgePrism	382	0.01	356	0.01	6.73
WebSphere	375	0.01	382	0.01	-2.36
WebSite	361	0.01	370	0.01	-2.95
WebSitePro	345	0.01	357	0.01	-3.88
DinaHTTPd	341	0.01	316	0.01	7.33
JRun	330	0.01	334	0.01	-1.73
Unknown	322	0.01	318	0.01	0.72
Secured	322	0.01	343	0.01	-6.62
SAP	315	0.01	314	0.01	-0.22
Indy	310	0.01	316	0.01	-2.42
Roxen	305	0.01	306	0.01	-0.86
RomPager	295	0.01	276	0.01	6.31
4D_WebSTAR_S	292	0.01	300	0.01	-3.19
OpenCms	291	0.01	285	0.01	1.56
SW	276	0.01	265	0.01	3.59
Power	261	0.01	275	0.01	-5.60
""	256	0.01	262	0.01	-2.81
SAMBAR	249	0.01	251	0.01	-1.33
Oracle-iPlanet-Web-Server	245	0.01	218	0.00	11.78
IIS	244	0.01	254	0.01	-4.45
WS	237	0.01	230	0.00	2.49
Oracle-Application-Server-11g	235	0.00	0	0.00	N/A
PWS	231	0.00	248	0.01	-7.35
HTTP	227	0.00	216	0.00	4.53
WebSEAL	222	0.00	211	0.00	4.65
unknown	214	0.00	0	0.00	N/A

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.