You are viewing an outdated report.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) 31,237,737 hostnames, but only 3,489,249 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	May 2008 Count	May 2008 %	April 2008 Count	April 2008 %	Growth %
Apache	2,019,893	57.89	2,001,560	58.05	-0.27
Microsoft-IIS	948,730	27.19	937,987	27.20	-0.04
null	221,658	6.35	217,303	6.30	0.81
Rapidsite	67,180	1.93	66,956	1.94	-0.84
Apache-Coyote	23,932	0.69	23,396	0.68	1.09
IdeaWebServer	18,391	0.53	17,614	0.51	3.19
A	16,420	0.47	16,191	0.47	0.22
lighttpd	14,247	0.41	9,853	0.29	42.90
Lotus-Domino	13,573	0.39	13,769	0.40	-2.58
nginx	13,091	0.38	11,888	0.34	8.83
Netscape-Enterprise	10,284	0.29	10,448	0.30	-2.73
IBM_HTTP_Server	4,986	0.14	4,882	0.14	0.93
Zope	4,548	0.13	4,465	0.13	0.66
Zeus	4,326	0.12	4,390	0.13	-2.61
WebServer	4,137	0.12	4,081	0.12	0.18
Sun-ONE-Web-Server	3,964	0.11	3,913	0.11	0.11
Apache-AdvancedExtranetServer	3,878	0.11	4,029	0.12	-4.88
squid	3,506	0.10	3,510	0.10	-1.29
Oracle-Application-Server-10g	3,372	0.10	3,356	0.10	-0.70
Resin	3,280	0.09	3,240	0.09	0.05
NOYB	3,168	0.09	3,245	0.09	-3.52
Cougar	2,058	0.06	2,002	0.06	1.59
IBM_HTTP_SERVER	1,882	0.05	1,938	0.06	-4.03
GWS	1,735	0.05	1,679	0.05	2.12
Ipswitch-IMail	1,646	0.05	1,684	0.05	-3.40
WebServerX	1,596	0.05	1,744	0.05	-9.56
IceWarp	1,586	0.05	1,578	0.05	-0.67
Jetty	1,543	0.04	1,551	0.04	-1.68
WDaemon	1,484	0.04	1,484	0.04	-1.17
Oracle	1,426	0.04	1,462	0.04	-3.61
WebSTAR	1,383	0.04	1,433	0.04	-4.62
WebLogic	1,241	0.04	1,246	0.04	-1.57
Boa	1,187	0.03	1,160	0.03	1.13
LiteSpeed	1,136	0.03	1,103	0.03	1.78
FileMakerPro	1,123	0.03	1,168	0.03	-4.98
BigIP	1,081	0.03	979	0.03	9.12
WebSite	1,064	0.03	1,065	0.03	-1.27
AkamaiGHost	1,064	0.03	952	0.03	10.45
III	1,050	0.03	1,054	0.03	-1.55
thttpd	1,038	0.03	1,012	0.03	1.36
BIG-IP	1,037	0.03	1,062	0.03	-3.50
AnWeb	1,019	0.03	1,044	0.03	-3.54
CommuniGatePro	1,009	0.03	993	0.03	0.42
PowerSchool	1,000	0.03	968	0.03	2.09
EdgePrism	994	0.03	886	0.03	10.87
EZproxy	980	0.03	975	0.03	-0.67
Web	920	0.03	889	0.03	2.27
WebSitePro	912	0.03	958	0.03	-5.92
4D_WebSTAR_S	832	0.02	844	0.02	-2.58
Microsoft-HTTPAPI	759	0.02	604	0.02	24.19
AOLserver	696	0.02	700	0.02	-1.74
cpsrvd	662	0.02	663	0.02	-1.32
WebtoB	637	0.02	620	0.02	1.54
4D_WebStar_D	634	0.02	640	0.02	-2.10
httpd+ssl	572	0.02	585	0.02	-3.37
Stronghold	549	0.02	562	0.02	-3.46
SAMBAR	540	0.02	543	0.02	-1.72
ListManagerWeb	523	0.01	506	0.01	2.15
DeleGate	522	0.01	537	0.02	-3.93
redir-httpd	512	0.01	511	0.01	-0.98
WWW	496	0.01	469	0.01	4.52
httpd	462	0.01	442	0.01	3.30
Oracle9iAS	458	0.01	488	0.01	-7.25
Abyss	457	0.01	434	0.01	4.06
NetCache	447	0.01	441	0.01	0.17
Sun-Java-System-Web-Server	441	0.01	423	0.01	3.03
NetWare-Enterprise-Web-Server	435	0.01	447	0.01	-3.83
ENIAC	430	0.01	476	0.01	-10.72
Roxen	408	0.01	414	0.01	-2.61
Nost	393	0.01	389	0.01	-0.16
Orion	388	0.01	402	0.01	-4.62
""	387	0.01	378	0.01	1.18
WebSphere	368	0.01	388	0.01	-6.27
Ultraseek	358	0.01	362	0.01	-2.27
Netscape-FastTrack	345	0.01	364	0.01	-6.33
JRun	344	0.01	336	0.01	1.18
Blocked	344	0.01	345	0.01	-1.46
NCSA	321	0.01	329	0.01	-3.58
IIS	313	0.01	302	0.01	2.43
Power	303	0.01	307	0.01	-2.46
IBM-HTTP-Server	300	0.01	315	0.01	-5.88
OSU	299	0.01	307	0.01	-3.75
Xitami	297	0.01	295	0.01	-0.50
gws	294	0.01	280	0.01	3.77
Secured	288	0.01	290	0.01	-1.86
Indy	284	0.01	304	0.01	-7.68
Server	283	0.01	276	0.01	1.33
Mittwald	279	0.01	280	0.01	-1.53
NS_6.1	253	0.01	265	0.01	-5.65
Acenet	237	0.01	285	0.01	-17.82
Rumpus	235	0.01	225	0.01	3.22
Jeus	230	0.01	233	0.01	-2.45
FirstClass	205	0.01	218	0.01	-7.07
DinaHTTPd	205	0.01	202	0.01	0.29
FJapache	204	0.01	194	0.01	3.92
CoralWebPrx	203	0.01	199	0.01	0.81
Apache-NeoNova	203	0.01	201	0.01	-0.19
Sun	202	0.01	197	0.01	1.33
Polaris	202	0.01	209	0.01	-4.48
AppleShareIP	187	0.01	195	0.01	-5.23

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.