You are viewing an outdated report. The latest version of this report was published on June 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) 37,033,473 hostnames, but only 3,710,715 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	January 2009 Count	January 2009 %	December 2008 Count	December 2008 %	Growth %
Apache	2,149,861	57.94	2,140,015	57.97	-0.05
Microsoft-IIS	985,834	26.57	983,073	26.63	-0.23
null	254,694	6.86	251,827	6.82	0.62
Rapidsite	59,936	1.62	60,134	1.63	-0.84
Apache-Coyote	28,642	0.77	28,122	0.76	1.33
nginx	22,768	0.61	21,831	0.59	3.76
IdeaWebServer	22,637	0.61	22,239	0.60	1.27
A	17,637	0.48	17,545	0.48	0.01
lighttpd	17,219	0.46	16,897	0.46	1.38
Lotus-Domino	13,276	0.36	13,241	0.36	-0.25
Netscape-Enterprise	8,955	0.24	9,056	0.25	-1.62
IBM_HTTP_Server	5,710	0.15	5,648	0.15	0.58
Zope	4,688	0.13	4,650	0.13	0.30
squid	4,144	0.11	4,048	0.11	1.85
Zeus	3,945	0.11	3,983	0.11	-1.46
Sun-ONE-Web-Server	3,860	0.10	3,895	0.11	-1.41
Microsoft-HTTPAPI	3,860	0.10	3,411	0.09	12.58
Oracle-Application-Server-10g	3,742	0.10	3,705	0.10	0.48
Resin	3,451	0.09	3,423	0.09	0.30
Apache-AdvancedExtranetServer	3,019	0.08	3,078	0.08	-2.42
NOYB	2,576	0.07	2,597	0.07	-1.32
LiteSpeed	2,427	0.07	2,098	0.06	15.09
Cougar	2,162	0.06	2,191	0.06	-1.83
WebServer	2,123	0.06	2,146	0.06	-1.58
BigIP	2,080	0.06	2,005	0.05	3.21
GWS	1,954	0.05	1,947	0.05	-0.15
WebServerX	1,696	0.05	1,704	0.05	-0.98
WDaemon	1,606	0.04	1,587	0.04	0.68
IBM_HTTP_SERVER	1,605	0.04	1,634	0.04	-2.28
IceWarp	1,595	0.04	1,595	0.04	-0.51
AkamaiGHost	1,568	0.04	1,864	0.05	-16.31
Jetty	1,538	0.04	1,537	0.04	-0.45
WWW	1,490	0.04	1,476	0.04	0.43
Ipswitch-IMail	1,411	0.04	1,406	0.04	-0.16
Oracle	1,357	0.04	1,344	0.04	0.45
Boa	1,259	0.03	1,256	0.03	-0.27
thttpd	1,167	0.03	1,191	0.03	-2.52
EZproxy	1,163	0.03	1,130	0.03	2.39
WebLogic	1,142	0.03	1,139	0.03	-0.25
WebSTAR	1,126	0.03	1,136	0.03	-1.39
III	1,087	0.03	1,060	0.03	2.02
Web	1,049	0.03	1,041	0.03	0.25
PowerSchool	1,034	0.03	997	0.03	3.18
AnWeb	1,025	0.03	953	0.03	7.00
CommuniGatePro	1,005	0.03	1,001	0.03	-0.11
WebSite	1,000	0.03	1,017	0.03	-2.17
FileMakerPro	979	0.03	961	0.03	1.35
BIG-IP	925	0.02	930	0.03	-1.05
Sun-Java-System-Web-Server	786	0.02	756	0.02	3.44
cpsrvd	723	0.02	715	0.02	0.60
WebSitePro	720	0.02	719	0.02	-0.37
4D_WebSTAR_S	697	0.02	699	0.02	-0.80
4D_WebStar_D	676	0.02	659	0.02	2.05
httpd	661	0.02	639	0.02	2.91
AOLserver	642	0.02	659	0.02	-3.08
WebtoB	639	0.02	649	0.02	-2.04
ListManagerWeb	619	0.02	607	0.02	1.46
gws	550	0.01	497	0.01	10.10
DeleGate	531	0.01	527	0.01	0.24
redir-httpd	513	0.01	513	0.01	-0.51
EdgePrism	476	0.01	472	0.01	0.33
SAMBAR	470	0.01	466	0.01	0.34
""	442	0.01	438	0.01	0.40
Stronghold	440	0.01	444	0.01	-1.41
Nost	435	0.01	432	0.01	0.18
NetCache	430	0.01	441	0.01	-2.99
Abyss	430	0.01	417	0.01	2.59
JRun	426	0.01	412	0.01	2.87
HTTPD	421	0.01	419	0.01	-0.04
Blocked	418	0.01	418	0.01	-0.51
WebSphere	390	0.01	380	0.01	2.11
httpd+ssl	388	0.01	405	0.01	-4.69
Roxen	387	0.01	392	0.01	-1.78
Oracle9iAS	386	0.01	388	0.01	-1.02
Sun	360	0.01	343	0.01	4.42
Orion	358	0.01	364	0.01	-2.15
Secured	357	0.01	346	0.01	2.65
Ultraseek	345	0.01	345	0.01	-0.51
Rumpus	328	0.01	314	0.01	3.92
ENIAC	320	0.01	324	0.01	-1.74
NetWare-Enterprise-Web-Server	310	0.01	309	0.01	-0.19
IIS	310	0.01	319	0.01	-3.32
Indy	307	0.01	320	0.01	-4.55
Server	294	0.01	288	0.01	1.56
ThirdSphere	285	0.01	0	0.00	N/A
Protected	276	0.01	275	0.01	-0.15
NCSA	276	0.01	276	0.01	-0.51
MediaFire-HTTP	275	0.01	263	0.01	4.03
Power	268	0.01	259	0.01	2.95
OSU	264	0.01	262	0.01	0.25
Xitami	261	0.01	261	0.01	-0.51
Netscape-FastTrack	253	0.01	267	0.01	-5.73
DinaHTTPd	250	0.01	249	0.01	-0.11
Jeus	235	0.01	231	0.01	1.21
IBM-HTTP-Server	233	0.01	245	0.01	-5.38
FJapache	215	0.01	210	0.01	1.86
Kerio	210	0.01	201	0.01	3.94
Polaris	207	0.01	200	0.01	2.97
SAP	204	0.01	198	0.01	2.50
Hanbiro	202	0.01	202	0.01	-0.51

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.