You are viewing an outdated report.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) 54,987,580 hostnames, but only 4,560,623 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	June 2011 Count	June 2011 %	May 2011 Count	May 2011 %	Growth %
Apache	2,699,503	59.19	2,681,632	59.12	0.12
Microsoft-IIS	1,009,924	22.14	1,012,064	22.31	-0.75
null	350,885	7.69	349,955	7.71	-0.27
nginx	131,119	2.88	125,466	2.77	3.94
Microsoft-HTTPAPI	50,194	1.10	47,735	1.05	4.58
Apache-Coyote	44,812	0.98	44,520	0.98	0.11
Rapidsite	44,429	0.97	45,450	1.00	-2.77
IdeaWebServer	37,517	0.82	36,955	0.81	0.97
lighttpd	19,517	0.43	19,292	0.43	0.62
A	16,280	0.36	16,494	0.36	-1.83
LiteSpeed	15,871	0.35	14,958	0.33	5.53
Lotus-Domino	11,503	0.25	11,532	0.25	-0.79
IBM_HTTP_Server	6,770	0.15	6,786	0.15	-0.77
BigIP	6,287	0.14	6,138	0.14	1.88
squid	5,003	0.11	4,863	0.11	2.32
Oracle-Application-Server-10g	3,984	0.09	4,046	0.09	-2.06
Zope	3,872	0.08	3,908	0.09	-1.45
Resin	3,290	0.07	3,351	0.07	-2.35
AkamaiGHost	2,886	0.06	2,959	0.07	-2.99
Zeus	2,622	0.06	2,686	0.06	-2.91
Sun-ONE-Web-Server	2,569	0.06	2,645	0.06	-3.40
Netscape-Enterprise	2,394	0.05	2,445	0.05	-2.61
Cougar	2,349	0.05	2,365	0.05	-1.21
HTTPD	1,873	0.04	1,803	0.04	3.32
WDaemon	1,745	0.04	1,747	0.04	-0.65
EZproxy	1,721	0.04	1,708	0.04	0.22
IceWarp	1,608	0.04	1,623	0.04	-1.46
GWS	1,509	0.03	1,531	0.03	-1.97
PowerSchool	1,480	0.03	1,502	0.03	-2.00
Apache-AdvancedExtranetServer	1,308	0.03	1,331	0.03	-2.26
apache	1,246	0.03	1,738	0.04	-28.69
Sun-Java-System-Web-Server	1,191	0.03	1,251	0.03	-5.31
III	1,166	0.03	1,174	0.03	-1.22
Web	1,130	0.02	1,133	0.02	-0.80
thttpd	1,104	0.02	1,123	0.02	-2.22
Jetty	1,071	0.02	1,118	0.02	-4.72
Boa	1,067	0.02	1,074	0.02	-1.19
Oracle	1,062	0.02	1,070	0.02	-1.28
httpd	1,018	0.02	1,006	0.02	0.65
Cherokee	997	0.02	959	0.02	3.40
CommuniGatePro	902	0.02	918	0.02	-2.27
cpsrvd	868	0.02	871	0.02	-0.88
WebServerX	842	0.02	869	0.02	-3.63
NOYB	833	0.02	839	0.02	-1.25
Sun	792	0.02	786	0.02	0.22
ListManagerWeb	787	0.02	796	0.02	-1.66
Varnish	764	0.02	726	0.02	4.67
AnWeb	759	0.02	791	0.02	-4.56
WWW	745	0.02	728	0.02	1.78
IBM_HTTP_SERVER	724	0.02	748	0.02	-3.73
Ipswitch-IMail	707	0.02	730	0.02	-3.67
Rumpus	687	0.02	682	0.02	0.19
xServers	652	0.01	611	0.01	6.14
sffe	640	0.01	709	0.02	-10.22
Server	637	0.01	419	0.01	51.21
WebtoB	631	0.01	652	0.01	-3.74
4D_WebStar_D	596	0.01	604	0.01	-1.86
Bomgar	559	0.01	548	0.01	1.46
FileMakerPro	542	0.01	558	0.01	-3.39
WebSTAR	528	0.01	533	0.01	-1.47
redir-httpd	514	0.01	513	0.01	-0.34
BIG-IP	475	0.01	500	0.01	-5.51
WebLogic	473	0.01	500	0.01	-5.91
-	467	0.01	419	0.01	10.86
DeleGate	458	0.01	464	0.01	-1.82
AOLserver	434	0.01	438	0.01	-1.45
Abyss	418	0.01	419	0.01	-0.78
WebSphere	390	0.01	393	0.01	-1.30
Secured	388	0.01	391	0.01	-1.30
WebSitePro	378	0.01	385	0.01	-2.35
JRun	373	0.01	393	0.01	-5.60
WebServer	369	0.01	371	0.01	-1.07
EdgePrism	358	0.01	367	0.01	-2.98
FC	355	0.01	362	0.01	-2.46
WebSite	354	0.01	396	0.01	-11.09
Power	331	0.01	340	0.01	-3.17
4D_WebSTAR_S	329	0.01	349	0.01	-6.24
Indy	322	0.01	331	0.01	-3.24
GlassFish	311	0.01	290	0.01	6.66
SW	307	0.01	318	0.01	-3.98
SAP	302	0.01	299	0.01	0.46
Roxen	301	0.01	302	0.01	-0.87
CloudFront	296	0.01	260	0.01	13.23
""	294	0.01	293	0.01	-0.20
SAMBAR	279	0.01	286	0.01	-2.97
OpenCms	267	0.01	254	0.01	4.55
RomPager	265	0.01	252	0.01	4.59
IIS	261	0.01	266	0.01	-2.41
Unknown	252	0.01	224	0.00	11.89
DinaHTTPd	247	0.01	229	0.01	7.28
IIS6	244	0.01	244	0.01	-0.54
PWS	229	0.01	0	0.00	N/A
Stronghold	225	0.00	255	0.01	-12.24
NetCache	224	0.00	231	0.01	-3.55
WS	217	0.00	219	0.00	-1.45
NetBox	214	0.00	210	0.00	1.36
Ultraseek	208	0.00	215	0.00	-3.78
Orion	203	0.00	212	0.00	-4.76
Microsoft	203	0.00	0	0.00	N/A
BarracudaHTTP	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.