You are viewing an outdated report.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) 55,788,535 hostnames, but only 4,570,554 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	July 2011 Count	July 2011 %	June 2011 Count	June 2011 %	Growth %
Apache	2,710,318	59.30	2,699,503	59.19	0.18
Microsoft-IIS	1,002,295	21.93	1,009,924	22.14	-0.97
null	352,439	7.71	350,885	7.69	0.22
nginx	133,880	2.93	131,119	2.88	1.88
Microsoft-HTTPAPI	52,356	1.15	50,194	1.10	4.08
Apache-Coyote	44,870	0.98	44,812	0.98	-0.09
Rapidsite	43,699	0.96	44,429	0.97	-1.86
IdeaWebServer	37,974	0.83	37,517	0.82	1.00
lighttpd	19,601	0.43	19,517	0.43	0.21
LiteSpeed	16,263	0.36	15,871	0.35	2.25
A	16,092	0.35	16,280	0.36	-1.37
Lotus-Domino	11,345	0.25	11,503	0.25	-1.59
IBM_HTTP_Server	6,770	0.15	6,770	0.15	-0.22
BigIP	6,426	0.14	6,287	0.14	1.99
squid	5,018	0.11	5,003	0.11	0.08
Oracle-Application-Server-10g	3,969	0.09	3,984	0.09	-0.59
Zope	3,830	0.08	3,872	0.08	-1.30
AkamaiGHost	3,631	0.08	2,886	0.06	25.54
Resin	3,221	0.07	3,290	0.07	-2.31
Zeus	2,563	0.06	2,622	0.06	-2.46
Sun-ONE-Web-Server	2,514	0.06	2,569	0.06	-2.35
Cougar	2,300	0.05	2,349	0.05	-2.30
Netscape-Enterprise	2,279	0.05	2,394	0.05	-5.01
HTTPD	1,950	0.04	1,873	0.04	3.88
EZproxy	1,732	0.04	1,721	0.04	0.42
WDaemon	1,715	0.04	1,745	0.04	-1.93
IceWarp	1,605	0.04	1,608	0.04	-0.40
GWS	1,471	0.03	1,509	0.03	-2.73
Apache-AdvancedExtranetServer	1,263	0.03	1,308	0.03	-3.65
Sun-Java-System-Web-Server	1,170	0.03	1,191	0.03	-1.98
III	1,159	0.03	1,166	0.03	-0.82
PowerSchool	1,156	0.03	1,480	0.03	-22.06
thttpd	1,145	0.03	1,104	0.02	3.49
Web	1,126	0.02	1,130	0.02	-0.57
Oracle	1,058	0.02	1,062	0.02	-0.59
Boa	1,053	0.02	1,067	0.02	-1.53
Cherokee	1,051	0.02	997	0.02	5.19
Jetty	1,016	0.02	1,071	0.02	-5.34
httpd	1,008	0.02	1,018	0.02	-1.20
apache	997	0.02	1,246	0.03	-20.16
CommuniGatePro	895	0.02	902	0.02	-0.99
cpsrvd	874	0.02	868	0.02	0.47
NOYB	818	0.02	833	0.02	-2.01
WebServerX	811	0.02	842	0.02	-3.89
Varnish	801	0.02	764	0.02	4.62
ListManagerWeb	781	0.02	787	0.02	-0.98
Sun	779	0.02	792	0.02	-1.86
AnWeb	730	0.02	759	0.02	-4.03
WWW	727	0.02	745	0.02	-2.63
-	707	0.02	467	0.01	51.06
Ipswitch-IMail	699	0.02	707	0.02	-1.35
IBM_HTTP_SERVER	687	0.02	724	0.02	-5.32
sffe	682	0.01	640	0.01	6.33
Rumpus	672	0.01	687	0.02	-2.40
xServers	664	0.01	652	0.01	1.62
WebtoB	631	0.01	631	0.01	-0.22
4D_WebStar_D	572	0.01	596	0.01	-4.24
Bomgar	561	0.01	559	0.01	0.14
FileMakerPro	536	0.01	542	0.01	-1.32
WebSTAR	519	0.01	528	0.01	-1.92
redir-httpd	516	0.01	514	0.01	0.17
BIG-IP	474	0.01	475	0.01	-0.43
WebLogic	468	0.01	473	0.01	-1.27
DeleGate	464	0.01	458	0.01	1.09
AOLserver	437	0.01	434	0.01	0.47
Server	435	0.01	637	0.01	-31.86
Abyss	391	0.01	418	0.01	-6.66
WebSite	385	0.01	354	0.01	8.52
FC	383	0.01	355	0.01	7.65
WebSphere	379	0.01	390	0.01	-3.03
Secured	379	0.01	388	0.01	-2.53
WebSitePro	374	0.01	378	0.01	-1.27
WebServer	366	0.01	369	0.01	-1.03
JRun	355	0.01	373	0.01	-5.03
EdgePrism	336	0.01	358	0.01	-6.35
ATS	330	0.01	0	0.00	N/A
GlassFish	329	0.01	311	0.01	5.56
4D_WebSTAR_S	316	0.01	329	0.01	-4.16
Indy	312	0.01	322	0.01	-3.32
Power	310	0.01	331	0.01	-6.55
SW	307	0.01	307	0.01	-0.22
SAP	300	0.01	302	0.01	-0.88
Roxen	299	0.01	301	0.01	-0.88
CloudFront	291	0.01	296	0.01	-1.90
""	278	0.01	294	0.01	-5.65
OpenCms	271	0.01	267	0.01	1.28
DinaHTTPd	265	0.01	247	0.01	7.05
RomPager	264	0.01	265	0.01	-0.59
SAMBAR	263	0.01	279	0.01	-5.94
IIS	254	0.01	261	0.01	-2.89
Unknown	245	0.01	252	0.01	-2.99
IIS6	243	0.01	244	0.01	-0.63
PWS	241	0.01	229	0.01	5.01
Stronghold	224	0.00	225	0.00	-0.66
WS	223	0.00	217	0.00	2.54
Ultraseek	204	0.00	208	0.00	-2.14
Orion	204	0.00	203	0.00	0.27
BarracudaHTTP	201	0.00	203	0.00	-1.20
Oracle-iPlanet-Web-Server	199	0.00	0	0.00	N/A
Microsoft	198	0.00	203	0.00	-2.67

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.