You are viewing an outdated report. The latest version of this report was published on January 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) 52,577,000 hostnames, but only 4,470,963 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	March 2011 Count	March 2011 %	February 2011 Count	February 2011 %	Growth %
Apache	2,637,544	58.99	2,598,614	58.99	0.01
Microsoft-IIS	1,015,322	22.71	1,005,929	22.83	-0.54
null	342,340	7.66	337,805	7.67	-0.14
nginx	114,789	2.57	108,506	2.46	4.24
Rapidsite	47,229	1.06	47,755	1.08	-2.55
Apache-Coyote	43,864	0.98	42,615	0.97	1.42
Microsoft-HTTPAPI	42,608	0.95	39,877	0.91	5.28
IdeaWebServer	35,879	0.80	35,154	0.80	0.57
lighttpd	18,931	0.42	18,640	0.42	0.07
A	16,976	0.38	17,120	0.39	-2.29
LiteSpeed	13,963	0.31	13,030	0.30	5.59
Lotus-Domino	11,753	0.26	11,676	0.27	-0.81
IBM_HTTP_Server	6,749	0.15	6,711	0.15	-0.91
BigIP	5,849	0.13	5,784	0.13	-0.36
squid	4,726	0.11	4,519	0.10	3.05
Oracle-Application-Server-10g	4,104	0.09	4,080	0.09	-0.88
Zope	4,010	0.09	3,988	0.09	-0.92
Resin	3,444	0.08	3,364	0.08	0.88
AkamaiGHost	3,324	0.07	2,795	0.06	17.18
Zeus	2,776	0.06	2,785	0.06	-1.78
Sun-ONE-Web-Server	2,746	0.06	2,805	0.06	-3.54
Netscape-Enterprise	2,542	0.06	2,589	0.06	-3.25
Cougar	2,368	0.05	2,401	0.05	-2.82
WDaemon	1,773	0.04	1,757	0.04	-0.57
EZproxy	1,680	0.04	1,653	0.04	0.14
apache	1,664	0.04	1,636	0.04	0.22
IceWarp	1,631	0.04	1,615	0.04	-0.49
HTTPD	1,627	0.04	1,604	0.04	-0.05
GWS	1,582	0.04	1,595	0.04	-2.27
PowerSchool	1,496	0.03	1,428	0.03	3.23
Apache-AdvancedExtranetServer	1,421	0.03	1,446	0.03	-3.17
Sun-Java-System-Web-Server	1,274	0.03	1,258	0.03	-0.21
III	1,172	0.03	1,165	0.03	-0.87
thttpd	1,158	0.03	1,148	0.03	-0.61
Jetty	1,142	0.03	1,157	0.03	-2.74
Web	1,133	0.03	1,106	0.03	0.94
Oracle	1,098	0.02	1,089	0.02	-0.65
Boa	1,080	0.02	1,058	0.02	0.58
httpd	999	0.02	1,042	0.02	-5.53
CommuniGatePro	920	0.02	905	0.02	0.17
WebServerX	890	0.02	1,825	0.04	-51.95
NOYB	888	0.02	940	0.02	-6.92
Cherokee	872	0.02	792	0.02	8.49
cpsrvd	854	0.02	847	0.02	-0.65
Sun	809	0.02	821	0.02	-2.90
IBM_HTTP_SERVER	808	0.02	819	0.02	-2.79
ListManagerWeb	780	0.02	780	0.02	-1.46
Ipswitch-IMail	769	0.02	788	0.02	-3.84
WWW	759	0.02	788	0.02	-5.09
Rumpus	695	0.02	662	0.02	3.45
AnWeb	684	0.02	818	0.02	-17.61
WebtoB	659	0.01	647	0.01	0.36
4D_WebStar_D	637	0.01	626	0.01	0.27
sffe	612	0.01	579	0.01	4.15
FileMakerPro	576	0.01	596	0.01	-4.77
WebSTAR	567	0.01	582	0.01	-4.00
Varnish	559	0.01	530	0.01	3.93
Bomgar	534	0.01	512	0.01	2.77
redir-httpd	516	0.01	515	0.01	-1.27
WebLogic	510	0.01	526	0.01	-4.46
xServers	499	0.01	471	0.01	4.39
BIG-IP	496	0.01	499	0.01	-2.06
AOLserver	469	0.01	468	0.01	-1.25
DeleGate	465	0.01	470	0.01	-2.51
WebSite	441	0.01	430	0.01	1.06
Kvchosting.com	423	0.01	0	0.00	N/A
Abyss	422	0.01	415	0.01	0.20
JRun	409	0.01	405	0.01	-0.49
Secured	402	0.01	405	0.01	-2.19
Server	397	0.01	390	0.01	0.30
WebSphere	396	0.01	383	0.01	1.88
WebSitePro	390	0.01	415	0.01	-7.40
WebServer	382	0.01	384	0.01	-1.98
Power	371	0.01	397	0.01	-7.92
4D_WebSTAR_S	363	0.01	370	0.01	-3.33
FC	345	0.01	331	0.01	2.70
EdgePrism	344	0.01	349	0.01	-2.88
Indy	339	0.01	333	0.01	0.31
SW	314	0.01	305	0.01	1.44
Roxen	309	0.01	310	0.01	-1.78
SAMBAR	295	0.01	302	0.01	-3.75
SAP	292	0.01	286	0.01	0.60
""	288	0.01	297	0.01	-4.45
IIS	268	0.01	270	0.01	-2.19
Stronghold	265	0.01	268	0.01	-2.57
GlassFish	256	0.01	222	0.01	13.63
ENIAC	254	0.01	257	0.01	-2.61
CloudFront	254	0.01	255	0.01	-1.85
NetCache	247	0.01	258	0.01	-5.67
-	245	0.01	0	0.00	N/A
RomPager	243	0.01	237	0.01	1.03
IIS6	242	0.01	240	0.01	-0.64
OpenCms	241	0.01	240	0.01	-1.05
Ultraseek	227	0.01	229	0.01	-2.33
NetBox	225	0.01	254	0.01	-12.71
Orion	217	0.00	237	0.01	-9.78
Hanbiro	215	0.00	215	0.00	-1.46
Unknown	214	0.00	221	0.01	-4.59
BarracudaHTTP	206	0.00	202	0.00	0.49
WS	202	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.