You are viewing an outdated report.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) 51,357,378 hostnames, but only 4,405,486 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	February 2011 Count	February 2011 %	January 2011 Count	January 2011 %	Growth %
Apache	2,598,614	58.99	2,571,521	58.94	0.07
Microsoft-IIS	1,005,929	22.83	1,004,082	23.01	-0.79
null	337,805	7.67	333,422	7.64	0.33
nginx	108,506	2.46	103,386	2.37	3.93
Rapidsite	47,755	1.08	48,718	1.12	-2.93
Apache-Coyote	42,615	0.97	41,626	0.95	1.38
Microsoft-HTTPAPI	39,877	0.91	37,491	0.86	5.33
IdeaWebServer	35,154	0.80	34,488	0.79	0.94
lighttpd	18,640	0.42	18,479	0.42	-0.11
A	17,120	0.39	17,305	0.40	-2.03
LiteSpeed	13,030	0.30	11,950	0.27	7.98
Lotus-Domino	11,676	0.27	11,724	0.27	-1.38
IBM_HTTP_Server	6,711	0.15	6,694	0.15	-0.72
BigIP	5,784	0.13	5,620	0.13	1.92
squid	4,519	0.10	4,586	0.11	-2.42
Oracle-Application-Server-10g	4,080	0.09	4,055	0.09	-0.36
Zope	3,988	0.09	4,066	0.09	-2.87
Resin	3,364	0.08	3,384	0.08	-1.56
Sun-ONE-Web-Server	2,805	0.06	2,834	0.06	-1.98
AkamaiGHost	2,795	0.06	3,156	0.07	-12.30
Zeus	2,785	0.06	2,822	0.06	-2.27
Netscape-Enterprise	2,589	0.06	2,680	0.06	-4.33
Cougar	2,401	0.05	2,372	0.05	0.24
WebServerX	1,825	0.04	1,771	0.04	2.05
WDaemon	1,757	0.04	1,703	0.04	2.17
EZproxy	1,653	0.04	1,615	0.04	1.36
apache	1,636	0.04	1,564	0.04	3.59
IceWarp	1,615	0.04	1,602	0.04	-0.17
HTTPD	1,604	0.04	1,501	0.03	5.83
GWS	1,595	0.04	1,630	0.04	-3.10
Apache-AdvancedExtranetServer	1,446	0.03	1,499	0.03	-4.47
PowerSchool	1,428	0.03	1,405	0.03	0.65
Sun-Java-System-Web-Server	1,258	0.03	1,263	0.03	-1.36
III	1,165	0.03	1,161	0.03	-0.63
Jetty	1,157	0.03	1,172	0.03	-2.24
thttpd	1,148	0.03	1,149	0.03	-1.06
Web	1,106	0.03	1,106	0.03	-0.97
Oracle	1,089	0.02	1,092	0.03	-1.24
Boa	1,058	0.02	1,060	0.02	-1.16
httpd	1,042	0.02	1,032	0.02	-0.01
NOYB	940	0.02	1,047	0.02	-11.09
CommuniGatePro	905	0.02	906	0.02	-1.08
cpsrvd	847	0.02	845	0.02	-0.74
Sun	821	0.02	820	0.02	-0.85
IBM_HTTP_SERVER	819	0.02	843	0.02	-3.79
AnWeb	818	0.02	853	0.02	-5.03
Cherokee	792	0.02	740	0.02	5.99
WWW	788	0.02	818	0.02	-4.60
Ipswitch-IMail	788	0.02	810	0.02	-3.66
ListManagerWeb	780	0.02	766	0.02	0.84
Rumpus	662	0.02	632	0.01	3.73
WebtoB	647	0.01	655	0.02	-2.18
4D_WebStar_D	626	0.01	634	0.01	-2.22
FileMakerPro	596	0.01	583	0.01	1.24
WebSTAR	582	0.01	607	0.01	-5.05
sffe	579	0.01	523	0.01	9.63
Varnish	530	0.01	505	0.01	3.93
WebLogic	526	0.01	526	0.01	-0.97
redir-httpd	515	0.01	515	0.01	-0.97
Bomgar	512	0.01	480	0.01	5.63
BIG-IP	499	0.01	506	0.01	-2.34
xServers	471	0.01	419	0.01	11.32
DeleGate	470	0.01	482	0.01	-3.44
AOLserver	468	0.01	472	0.01	-1.81
WebSite	430	0.01	468	0.01	-9.01
WebSitePro	415	0.01	433	0.01	-5.09
Abyss	415	0.01	410	0.01	0.24
Secured	405	0.01	444	0.01	-9.67
JRun	405	0.01	414	0.01	-3.12
Power	397	0.01	415	0.01	-5.27
Server	390	0.01	385	0.01	0.32
WebServer	384	0.01	381	0.01	-0.19
WebSphere	383	0.01	380	0.01	-0.19
4D_WebSTAR_S	370	0.01	365	0.01	0.39
EdgePrism	349	0.01	340	0.01	1.65
Indy	333	0.01	329	0.01	0.23
FC	331	0.01	342	0.01	-4.16
Roxen	310	0.01	322	0.01	-4.66
SW	305	0.01	303	0.01	-0.32
SAMBAR	302	0.01	302	0.01	-0.97
""	297	0.01	289	0.01	1.77
SAP	286	0.01	283	0.01	0.08
IIS	270	0.01	281	0.01	-4.85
Stronghold	268	0.01	278	0.01	-4.53
NetCache	258	0.01	258	0.01	-0.97
ENIAC	257	0.01	259	0.01	-1.73
CloudFront	255	0.01	349	0.01	-27.64
NetBox	254	0.01	223	0.01	12.80
OpenCms	240	0.01	220	0.01	8.03
IIS6	240	0.01	244	0.01	-2.59
RomPager	237	0.01	211	0.00	11.23
Orion	237	0.01	246	0.01	-4.59
Ultraseek	229	0.01	233	0.01	-2.67
GlassFish	222	0.01	0	0.00	N/A
Unknown	221	0.01	210	0.00	4.22
Hanbiro	215	0.00	212	0.00	0.43
BarracudaHTTP	202	0.00	199	0.00	0.52
VB	201	0.00	200	0.00	-0.48
PWS	200	0.00	0	0.00	N/A
TimmiT	199	0.00	206	0.00	-4.34

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.