You are viewing an outdated report.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) 48,912,666 hostnames, but only 4,269,056 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	November 2010 Count	November 2010 %	October 2010 Count	October 2010 %	Growth %
Apache	2,512,051	58.84	2,490,612	58.91	-0.12
Microsoft-IIS	997,306	23.36	992,671	23.48	-0.51
null	326,295	7.64	319,669	7.56	1.09
nginx	91,772	2.15	87,545	2.07	3.81
Rapidsite	50,275	1.18	50,960	1.21	-2.30
Apache-Coyote	40,518	0.95	39,436	0.93	1.75
Microsoft-HTTPAPI	33,187	0.78	30,981	0.73	6.08
IdeaWebServer	33,027	0.77	32,496	0.77	0.65
lighttpd	17,703	0.41	17,327	0.41	1.18
A	17,315	0.41	17,394	0.41	-1.42
Lotus-Domino	11,860	0.28	11,804	0.28	-0.50
LiteSpeed	10,901	0.26	10,355	0.24	4.25
IBM_HTTP_Server	6,658	0.16	6,542	0.15	0.79
BigIP	5,274	0.12	5,046	0.12	3.51
squid	4,389	0.10	4,348	0.10	-0.03
Oracle-Application-Server-10g	4,130	0.10	4,093	0.10	-0.07
Zope	4,121	0.10	4,164	0.10	-1.99
Resin	3,374	0.08	3,345	0.08	-0.11
Sun-ONE-Web-Server	2,899	0.07	2,948	0.07	-2.61
Zeus	2,853	0.07	2,904	0.07	-2.71
AkamaiGHost	2,846	0.07	3,026	0.07	-6.86
Netscape-Enterprise	2,820	0.07	2,911	0.07	-4.06
Cougar	2,413	0.06	2,363	0.06	1.13
WDaemon	1,708	0.04	1,675	0.04	0.98
GWS	1,688	0.04	1,676	0.04	-0.26
WebServerX	1,665	0.04	1,686	0.04	-2.20
IceWarp	1,599	0.04	1,597	0.04	-0.84
EZproxy	1,581	0.04	1,549	0.04	1.08
Apache-AdvancedExtranetServer	1,563	0.04	1,602	0.04	-3.38
HTTPD	1,407	0.03	1,500	0.04	-7.11
PowerSchool	1,399	0.03	1,354	0.03	2.32
apache	1,398	0.03	1,356	0.03	2.10
Sun-Java-System-Web-Server	1,304	0.03	1,285	0.03	0.50
Jetty	1,227	0.03	1,257	0.03	-3.33
III	1,166	0.03	1,159	0.03	-0.37
thttpd	1,132	0.03	1,146	0.03	-2.18
NOYB	1,089	0.03	1,107	0.03	-2.58
Web	1,088	0.03	1,161	0.03	-7.19
Oracle	1,088	0.03	1,096	0.03	-1.69
httpd	1,060	0.02	1,050	0.02	-0.02
Boa	1,053	0.02	1,075	0.03	-2.99
CommuniGatePro	915	0.02	925	0.02	-2.04
IBM_HTTP_SERVER	873	0.02	906	0.02	-4.57
AnWeb	861	0.02	858	0.02	-0.62
Ipswitch-IMail	851	0.02	860	0.02	-2.00
cpsrvd	842	0.02	856	0.02	-2.59
Sun	817	0.02	799	0.02	1.26
WWW	770	0.02	791	0.02	-3.60
ListManagerWeb	769	0.02	737	0.02	3.33
WebSTAR	651	0.02	672	0.02	-4.06
Cherokee	650	0.02	643	0.02	0.11
4D_WebStar_D	650	0.02	637	0.02	1.05
WebtoB	639	0.01	647	0.02	-2.19
FileMakerPro	634	0.01	624	0.01	0.62
Rumpus	615	0.01	588	0.01	3.58
sffe	584	0.01	589	0.01	-1.81
WebLogic	544	0.01	533	0.01	1.08
redir-httpd	515	0.01	515	0.01	-0.97
BIG-IP	514	0.01	509	0.01	0.01
AOLserver	493	0.01	511	0.01	-4.46
DeleGate	485	0.01	489	0.01	-1.78
WebSite	472	0.01	481	0.01	-2.82
Secured	447	0.01	461	0.01	-3.98
WebSitePro	441	0.01	447	0.01	-2.30
Varnish	439	0.01	389	0.01	11.76
Bomgar	436	0.01	425	0.01	1.60
JRun	434	0.01	421	0.01	2.09
WebServer	410	0.01	412	0.01	-1.45
xServers	408	0.01	359	0.01	12.55
Abyss	405	0.01	423	0.01	-5.18
Power	389	0.01	386	0.01	-0.20
4D_WebSTAR_S	385	0.01	393	0.01	-2.98
EdgePrism	383	0.01	422	0.01	-10.12
WebSphere	375	0.01	370	0.01	0.37
Server	366	0.01	362	0.01	0.13
Indy	332	0.01	321	0.01	2.43
Roxen	331	0.01	335	0.01	-2.15
""	318	0.01	327	0.01	-3.69
SAMBAR	315	0.01	321	0.01	-2.82
SW	294	0.01	300	0.01	-2.95
Stronghold	292	0.01	297	0.01	-2.63
FC	285	0.01	265	0.01	6.51
SAP	275	0.01	276	0.01	-1.33
IIS	268	0.01	278	0.01	-4.53
ENIAC	257	0.01	256	0.01	-0.58
Orion	256	0.01	258	0.01	-1.74
NetCache	256	0.01	271	0.01	-6.45
CloudFront	253	0.01	270	0.01	-7.20
IIS6	245	0.01	245	0.01	-0.97
Ultraseek	244	0.01	243	0.01	-0.56
NetBox	232	0.01	213	0.01	7.87
Hanbiro	218	0.01	221	0.01	-2.31
Oracle9iAS	213	0.00	212	0.01	-0.50
OpenCms	211	0.00	211	0.00	-0.97
TimmiT	210	0.00	222	0.01	-6.32
Xitami	203	0.00	198	0.00	1.53
VB	202	0.00	197	0.00	1.55
RomPager	199	0.00	196	0.00	0.55
OSU	197	0.00	198	0.00	-1.47
BarracudaHTTP	195	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.