You are viewing an outdated report.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) 56,535,678 hostnames, but only 4,623,676 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	August 2011 Count	August 2011 %	July 2011 Count	July 2011 %	Growth %
Apache	2,740,302	59.27	2,710,318	59.30	-0.06
Microsoft-IIS	1,007,659	21.79	1,002,295	21.93	-0.62
null	359,431	7.77	352,439	7.71	0.81
nginx	140,859	3.05	133,880	2.93	4.00
Microsoft-HTTPAPI	54,926	1.19	52,356	1.15	3.70
Apache-Coyote	45,916	0.99	44,870	0.98	1.16
Rapidsite	42,897	0.93	43,699	0.96	-2.96
IdeaWebServer	38,594	0.83	37,974	0.83	0.47
lighttpd	19,923	0.43	19,601	0.43	0.47
LiteSpeed	15,990	0.35	16,263	0.36	-2.81
A	15,937	0.34	16,092	0.35	-2.10
Lotus-Domino	11,360	0.25	11,345	0.25	-1.02
IBM_HTTP_Server	6,830	0.15	6,770	0.15	-0.27
BigIP	6,536	0.14	6,426	0.14	0.54
squid	5,118	0.11	5,018	0.11	0.82
Oracle-Application-Server-10g	3,939	0.09	3,969	0.09	-1.90
Zope	3,783	0.08	3,830	0.08	-2.36
Resin	3,252	0.07	3,221	0.07	-0.20
AkamaiGHost	2,576	0.06	3,631	0.08	-29.87
Zeus	2,522	0.05	2,563	0.06	-2.73
Sun-ONE-Web-Server	2,496	0.05	2,514	0.06	-1.86
Cougar	2,338	0.05	2,300	0.05	0.48
Netscape-Enterprise	2,234	0.05	2,279	0.05	-3.10
HTTPD	2,032	0.04	1,950	0.04	3.01
EZproxy	1,761	0.04	1,732	0.04	0.51
WDaemon	1,715	0.04	1,715	0.04	-1.15
IceWarp	1,581	0.03	1,605	0.04	-2.63
GWS	1,461	0.03	1,471	0.03	-1.82
Apache-AdvancedExtranetServer	1,249	0.03	1,263	0.03	-2.24
Sun-Java-System-Web-Server	1,164	0.03	1,170	0.03	-1.66
III	1,158	0.03	1,159	0.03	-1.23
thttpd	1,147	0.02	1,145	0.03	-0.98
Web	1,126	0.02	1,126	0.02	-1.15
Cherokee	1,073	0.02	1,051	0.02	0.92
Boa	1,055	0.02	1,053	0.02	-0.96
-	1,045	0.02	707	0.02	46.11
Oracle	1,042	0.02	1,058	0.02	-2.64
apache	1,010	0.02	997	0.02	0.14
httpd	998	0.02	1,008	0.02	-2.13
Jetty	988	0.02	1,016	0.02	-3.87
CommuniGatePro	879	0.02	895	0.02	-2.92
cpsrvd	876	0.02	874	0.02	-0.92
PowerSchool	869	0.02	1,156	0.03	-25.69
Varnish	849	0.02	801	0.02	4.77
ListManagerWeb	794	0.02	781	0.02	0.50
WebServerX	789	0.02	811	0.02	-3.83
Sun	780	0.02	779	0.02	-1.02
NOYB	757	0.02	818	0.02	-8.52
WWW	741	0.02	727	0.02	0.75
AnWeb	738	0.02	730	0.02	-0.07
Nginx	722	0.02	0	0.00	N/A
sffe	721	0.02	682	0.01	4.50
xServers	704	0.02	664	0.01	4.81
Rumpus	703	0.02	672	0.01	3.41
IBM_HTTP_SERVER	686	0.01	687	0.02	-1.29
Ipswitch-IMail	677	0.01	699	0.02	-4.26
WebtoB	622	0.01	631	0.01	-2.56
Bomgar	575	0.01	561	0.01	1.32
4D_WebStar_D	572	0.01	572	0.01	-1.15
FileMakerPro	529	0.01	536	0.01	-2.44
redir-httpd	513	0.01	516	0.01	-1.72
WebSTAR	510	0.01	519	0.01	-2.86
BIG-IP	476	0.01	474	0.01	-0.73
DeleGate	464	0.01	464	0.01	-1.15
WebLogic	452	0.01	468	0.01	-4.53
AOLserver	435	0.01	437	0.01	-1.60
Server	432	0.01	435	0.01	-1.83
FC	422	0.01	383	0.01	8.92
Abyss	404	0.01	391	0.01	2.14
WebServer	378	0.01	366	0.01	2.09
WebSphere	375	0.01	379	0.01	-2.19
WebSite	375	0.01	385	0.01	-3.72
WebSitePro	370	0.01	374	0.01	-2.21
Secured	368	0.01	379	0.01	-4.02
EdgePrism	362	0.01	336	0.01	6.50
GlassFish	348	0.01	329	0.01	4.56
JRun	346	0.01	355	0.01	-3.65
ATS	343	0.01	330	0.01	2.75
4D_WebSTAR_S	320	0.01	316	0.01	0.10
Indy	316	0.01	312	0.01	0.12
SAP	307	0.01	300	0.01	1.16
SW	306	0.01	307	0.01	-1.47
Roxen	300	0.01	299	0.01	-0.82
Power	299	0.01	310	0.01	-4.66
DinaHTTPd	280	0.01	265	0.01	4.45
""	275	0.01	278	0.01	-2.22
OpenCms	274	0.01	271	0.01	-0.05
cloudflare-nginx	266	0.01	0	0.00	N/A
CloudFront	260	0.01	291	0.01	-11.68
SAMBAR	258	0.01	263	0.01	-3.03
RomPager	255	0.01	264	0.01	-4.52
IIS	254	0.01	254	0.01	-1.15
Unknown	245	0.01	245	0.01	-1.15
IIS6	243	0.01	243	0.01	-1.15
PWS	231	0.00	241	0.01	-5.25
WS	226	0.00	223	0.00	0.18
HTTP	214	0.00	0	0.00	N/A
Stronghold	213	0.00	224	0.00	-6.00
Ultraseek	204	0.00	204	0.00	-1.15
PHP-CGI	203	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.