You are viewing an outdated report.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) 39,325,416 hostnames, but only 3,807,029 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	August 2009 Count	August 2009 %	July 2009 Count	July 2009 %	Growth %
Apache	2,218,985	58.29	2,195,758	58.24	0.07
Microsoft-IIS	972,697	25.55	967,433	25.66	-0.44
null	277,825	7.30	274,249	7.27	0.32
Rapidsite	56,515	1.48	56,487	1.50	-0.93
nginx	36,910	0.97	34,830	0.92	4.94
Apache-Coyote	31,065	0.82	30,530	0.81	0.76
IdeaWebServer	25,617	0.67	25,189	0.67	0.71
lighttpd	18,605	0.49	18,355	0.49	0.37
A	17,643	0.46	17,573	0.47	-0.58
Lotus-Domino	12,542	0.33	12,540	0.33	-0.96
Microsoft-HTTPAPI	9,383	0.25	8,579	0.23	8.31
IBM_HTTP_Server	6,109	0.16	6,081	0.16	-0.52
LiteSpeed	4,632	0.12	4,262	0.11	7.62
Netscape-Enterprise	4,627	0.12	4,741	0.13	-3.36
Zope	4,420	0.12	4,467	0.12	-2.02
squid	4,141	0.11	4,160	0.11	-1.43
Oracle-Application-Server-10g	3,904	0.10	3,856	0.10	0.26
Zeus	3,642	0.10	3,810	0.10	-5.34
Sun-ONE-Web-Server	3,569	0.09	3,634	0.10	-2.75
Resin	3,352	0.09	3,346	0.09	-0.80
BigIP	2,953	0.08	2,815	0.07	3.88
Apache-AdvancedExtranetServer	2,419	0.06	2,471	0.07	-3.06
Cougar	2,301	0.06	2,244	0.06	1.54
AkamaiGHost	2,223	0.06	2,054	0.05	7.17
GWS	1,985	0.05	1,985	0.05	-0.97
NOYB	1,974	0.05	1,988	0.05	-1.67
WDaemon	1,574	0.04	1,569	0.04	-0.66
IceWarp	1,556	0.04	1,565	0.04	-1.54
WWW	1,462	0.04	1,439	0.04	0.61
Jetty	1,452	0.04	1,452	0.04	-0.97
WebServer	1,442	0.04	1,499	0.04	-4.74
IBM_HTTP_SERVER	1,360	0.04	1,356	0.04	-0.68
WebServerX	1,327	0.03	1,336	0.04	-1.64
EZproxy	1,268	0.03	1,247	0.03	0.69
Oracle	1,230	0.03	1,246	0.03	-2.25
Web	1,200	0.03	1,182	0.03	0.53
Boa	1,185	0.03	1,187	0.03	-1.14
Ipswitch-IMail	1,166	0.03	1,183	0.03	-2.40
thttpd	1,147	0.03	1,124	0.03	1.05
III	1,108	0.03	1,105	0.03	-0.71
WebLogic	1,028	0.03	1,055	0.03	-3.51
PowerSchool	1,008	0.03	1,000	0.03	-0.18
Sun-Java-System-Web-Server	980	0.03	955	0.03	1.62
CommuniGatePro	950	0.02	948	0.03	-0.77
WebSTAR	928	0.02	948	0.03	-3.06
AnWeb	920	0.02	871	0.02	4.60
httpd	859	0.02	863	0.02	-1.43
FileMakerPro	794	0.02	830	0.02	-5.27
BIG-IP	787	0.02	801	0.02	-2.71
cpsrvd	729	0.02	715	0.02	0.96
ListManagerWeb	660	0.02	650	0.02	0.55
4D_WebStar_D	655	0.02	677	0.02	-4.19
WebSitePro	642	0.02	646	0.02	-1.59
WebtoB	630	0.02	627	0.02	-0.50
AOLserver	581	0.02	593	0.02	-2.98
gws	570	0.01	590	0.02	-4.33
4D_WebSTAR_S	552	0.01	555	0.01	-1.51
WebSite	548	0.01	544	0.01	-0.25
Sun	529	0.01	489	0.01	7.13
ThirdSphere	518	0.01	530	0.01	-3.22
HTTPD	518	0.01	495	0.01	3.63
DeleGate	518	0.01	516	0.01	-0.59
redir-httpd	514	0.01	511	0.01	-0.39
Power	455	0.01	449	0.01	0.35
JRun	414	0.01	418	0.01	-1.92
Abyss	411	0.01	406	0.01	0.24
""	410	0.01	416	0.01	-2.40
Secured	409	0.01	382	0.01	6.02
SAMBAR	392	0.01	401	0.01	-3.20
Stronghold	369	0.01	377	0.01	-3.08
WebSphere	366	0.01	371	0.01	-2.31
NetCache	362	0.01	368	0.01	-2.59
Rumpus	361	0.01	364	0.01	-1.79
Roxen	360	0.01	371	0.01	-3.91
ENIAC	329	0.01	323	0.01	0.86
lighttpd-yt	323	0.01	311	0.01	2.85
Oracle9iAS	312	0.01	319	0.01	-3.15
Orion	306	0.01	316	0.01	-4.11
Ultraseek	305	0.01	307	0.01	-1.62
Server	301	0.01	298	0.01	0.02
Indy	289	0.01	300	0.01	-4.61
IIS	282	0.01	268	0.01	4.20
httpd+ssl	271	0.01	275	0.01	-2.42
Powered	264	0.01	276	0.01	-5.28
CoralWebPrx	258	0.01	215	0.01	18.83
OSU	243	0.01	251	0.01	-4.13
NCSA	238	0.01	257	0.01	-8.30
JS	235	0.01	219	0.01	6.26
Kerio	234	0.01	223	0.01	3.91
SAP	232	0.01	232	0.01	-0.97
Xitami	231	0.01	234	0.01	-2.24
NetWare-Enterprise-Web-Server	230	0.01	246	0.01	-7.42
EdgePrism	225	0.01	206	0.01	8.16
Hanbiro	196	0.01	195	0.01	-0.47
SW	194	0.01	206	0.01	-6.74
FJapache	194	0.01	193	0.01	-0.46
SegPache	193	0.01	197	0.01	-2.99
Apache-NeoNova	192	0.01	192	0.01	-0.97
Polaris	190	0.00	191	0.01	-1.49
VB	186	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.