You are viewing an outdated report. The latest version of this report was published on October 1st, 2024

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) 36,756,503 hostnames, but only 3,706,351 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	April 2009 Count	April 2009 %	March 2009 Count	March 2009 %	Growth %
Apache	2,150,021	58.01	2,165,476	57.98	0.04
Microsoft-IIS	964,399	26.02	977,761	26.18	-0.61
null	264,208	7.13	263,450	7.05	1.05
Rapidsite	57,854	1.56	59,026	1.58	-1.24
nginx	29,695	0.80	28,012	0.75	6.82
Apache-Coyote	29,102	0.79	29,139	0.78	0.64
IdeaWebServer	23,519	0.63	23,472	0.63	0.96
A	17,447	0.47	17,607	0.47	-0.15
lighttpd	17,430	0.47	18,002	0.48	-2.44
Lotus-Domino	12,885	0.35	13,055	0.35	-0.55
Netscape-Enterprise	8,329	0.22	8,695	0.23	-3.48
Microsoft-HTTPAPI	6,266	0.17	5,216	0.14	21.05
IBM_HTTP_Server	5,869	0.16	5,808	0.16	1.82
Zope	4,534	0.12	4,624	0.12	-1.20
squid	4,341	0.12	4,283	0.11	2.13
Zeus	3,916	0.11	3,991	0.11	-1.13
Sun-ONE-Web-Server	3,805	0.10	3,869	0.10	-0.90
Oracle-Application-Server-10g	3,796	0.10	3,774	0.10	1.35
LiteSpeed	3,523	0.10	3,209	0.09	10.62
Resin	3,386	0.09	3,422	0.09	-0.30
Apache-AdvancedExtranetServer	2,707	0.07	2,854	0.08	-4.43
BigIP	2,438	0.07	2,296	0.06	6.99
Cougar	2,215	0.06	2,260	0.06	-1.24
AkamaiGHost	2,145	0.06	1,530	0.04	41.27
WebServer	2,012	0.05	2,076	0.06	-2.34
GWS	1,957	0.05	1,981	0.05	-0.46
NOYB	1,655	0.04	1,844	0.05	-9.56
WDaemon	1,560	0.04	1,594	0.04	-1.39
IceWarp	1,549	0.04	1,583	0.04	-1.40
WebServerX	1,548	0.04	1,661	0.04	-6.09
Jetty	1,512	0.04	1,521	0.04	0.17
IBM_HTTP_SERVER	1,455	0.04	1,511	0.04	-2.97
WWW	1,399	0.04	1,444	0.04	-2.38
Oracle	1,286	0.03	1,311	0.04	-1.16
Ipswitch-IMail	1,264	0.03	1,342	0.04	-5.09
Boa	1,204	0.03	1,261	0.03	-3.79
EZproxy	1,198	0.03	1,208	0.03	-0.07
Web	1,127	0.03	1,065	0.03	6.63
thttpd	1,121	0.03	1,130	0.03	-0.04
WebLogic	1,093	0.03	1,116	0.03	-1.31
III	1,090	0.03	1,089	0.03	0.86
PowerSchool	1,054	0.03	1,071	0.03	-0.84
WebSTAR	1,027	0.03	1,064	0.03	-2.74
CommuniGatePro	979	0.03	989	0.03	-0.26
AnWeb	974	0.03	998	0.03	-1.66
FileMakerPro	909	0.02	928	0.02	-1.30
Sun-Java-System-Web-Server	898	0.02	868	0.02	4.25
BIG-IP	854	0.02	909	0.02	-5.33
WebSite	843	0.02	885	0.02	-4.02
httpd	813	0.02	764	0.02	7.23
cpsrvd	710	0.02	748	0.02	-4.36
WebSitePro	690	0.02	693	0.02	0.33
4D_WebStar_D	675	0.02	679	0.02	0.17
WebtoB	647	0.02	655	0.02	-0.47
4D_WebSTAR_S	630	0.02	682	0.02	-6.92
ListManagerWeb	622	0.02	624	0.02	0.44
AOLserver	602	0.02	628	0.02	-3.41
gws	585	0.02	621	0.02	-5.08
lighttpd-yt	526	0.01	0	0.00	N/A
DeleGate	523	0.01	530	0.01	-0.57
ThirdSphere	520	0.01	522	0.01	0.38
redir-httpd	511	0.01	514	0.01	0.17
HTTPD	475	0.01	453	0.01	5.66
""	440	0.01	449	0.01	-1.26
SAMBAR	438	0.01	445	0.01	-0.82
Abyss	430	0.01	428	0.01	1.23
Blocked	422	0.01	421	0.01	1.00
Nost	419	0.01	434	0.01	-2.72
JRun	412	0.01	431	0.01	-3.68
Sun	409	0.01	405	0.01	1.76
NetCache	399	0.01	428	0.01	-6.06
Secured	393	0.01	340	0.01	16.47
Stronghold	388	0.01	409	0.01	-4.41
WebSphere	387	0.01	386	0.01	1.02
Roxen	374	0.01	379	0.01	-0.57
Power	365	0.01	235	0.01	56.50
Oracle9iAS	343	0.01	359	0.01	-3.73
Rumpus	329	0.01	335	0.01	-1.04
Ultraseek	326	0.01	330	0.01	-0.46
Orion	326	0.01	336	0.01	-2.24
ENIAC	317	0.01	325	0.01	-1.72
Indy	308	0.01	309	0.01	0.44
MediaFire-HTTP	290	0.01	300	0.01	-2.60
Server	285	0.01	283	0.01	1.48
NetWare-Enterprise-Web-Server	284	0.01	297	0.01	-3.65
IIS	284	0.01	294	0.01	-2.66
Powered	269	0.01	0	0.00	N/A
NCSA	267	0.01	262	0.01	2.69
OSU	254	0.01	253	0.01	1.16
DinaHTTPd	252	0.01	258	0.01	-1.58
Xitami	242	0.01	258	0.01	-5.49
EdgePrism	229	0.01	506	0.01	-54.40
Netscape-FastTrack	227	0.01	245	0.01	-6.64
httpd+ssl	220	0.01	312	0.01	-28.95
SAP	220	0.01	214	0.01	3.59
Kerio	207	0.01	217	0.01	-3.88
Polaris	205	0.01	206	0.01	0.27
Jeus	205	0.01	219	0.01	-5.68
Hanbiro	204	0.01	201	0.01	2.27
IBM-HTTP-Server	203	0.01	203	0.01	0.76

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.