You are viewing an outdated report.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) 56,969,641 hostnames, but only 4,694,053 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	October 2011 Count	October 2011 %	September 2011 Count	September 2011 %	Growth %
Apache	2,779,000	59.20	2,763,726	59.35	-0.24
Microsoft-IIS	1,009,505	21.51	1,005,814	21.60	-0.43
null	365,038	7.78	360,746	7.75	0.39
nginx	157,906	3.36	148,461	3.19	5.52
Microsoft-HTTPAPI	59,983	1.28	57,655	1.24	3.21
Apache-Coyote	47,041	1.00	46,114	0.99	1.20
Rapidsite	40,654	0.87	42,029	0.90	-4.04
IdeaWebServer	39,506	0.84	39,027	0.84	0.42
lighttpd	20,280	0.43	19,965	0.43	0.77
LiteSpeed	16,717	0.36	16,500	0.35	0.51
A	15,582	0.33	15,786	0.34	-2.07
Lotus-Domino	11,206	0.24	11,260	0.24	-1.27
BigIP	6,917	0.15	6,713	0.14	2.22
IBM_HTTP_Server	6,857	0.15	6,819	0.15	-0.24
squid	5,357	0.11	5,349	0.11	-0.64
Oracle-Application-Server-10g	3,859	0.08	3,880	0.08	-1.33
Zope	3,759	0.08	3,751	0.08	-0.58
Resin	3,240	0.07	3,241	0.07	-0.82
AkamaiGHost	3,014	0.06	2,661	0.06	12.37
Zeus	2,417	0.05	2,436	0.05	-1.57
Sun-ONE-Web-Server	2,400	0.05	2,449	0.05	-2.78
Cougar	2,281	0.05	2,289	0.05	-1.14
HTTPD	2,195	0.05	2,117	0.05	2.86
Netscape-Enterprise	2,100	0.04	2,166	0.05	-3.82
EZproxy	1,807	0.04	1,782	0.04	0.60
WDaemon	1,750	0.04	1,747	0.04	-0.62
IceWarp	1,569	0.03	1,576	0.03	-1.23
GWS	1,426	0.03	1,448	0.03	-2.30
Apache-AdvancedExtranetServer	1,203	0.03	1,229	0.03	-2.89
III	1,170	0.02	1,166	0.03	-0.45
Web	1,163	0.02	1,133	0.02	1.83
Sun-Java-System-Web-Server	1,156	0.02	1,168	0.03	-1.81
Cherokee	1,126	0.02	1,081	0.02	3.34
thttpd	1,124	0.02	1,117	0.02	-0.17
Varnish	1,112	0.02	935	0.02	17.99
-	1,053	0.02	1,053	0.02	-0.79
Oracle	1,028	0.02	1,028	0.02	-0.79
Boa	1,028	0.02	1,060	0.02	-3.79
apache	1,013	0.02	1,019	0.02	-1.38
httpd	988	0.02	1,013	0.02	-3.24
Jetty	934	0.02	954	0.02	-2.87
Apachenginx	906	0.02	0	0.00	N/A
CommuniGatePro	894	0.02	888	0.02	-0.12
cpsrvd	854	0.02	865	0.02	-2.05
Sun	795	0.02	781	0.02	0.99
PowerSchool	781	0.02	815	0.02	-4.93
xServers	772	0.02	734	0.02	4.34
WWW	761	0.02	767	0.02	-1.57
ListManagerWeb	758	0.02	761	0.02	-1.18
WebServerX	753	0.02	765	0.02	-2.35
Nginx	743	0.02	722	0.02	2.09
AnWeb	729	0.02	718	0.02	0.73
NOYB	713	0.02	733	0.02	-3.50
Rumpus	709	0.02	700	0.02	0.48
Ipswitch-IMail	637	0.01	661	0.01	-4.39
sffe	629	0.01	684	0.01	-8.77
IBM_HTTP_SERVER	616	0.01	626	0.01	-2.38
WebtoB	609	0.01	618	0.01	-2.24
Bomgar	601	0.01	588	0.01	1.40
4D_WebStar_D	565	0.01	574	0.01	-2.35
FileMakerPro	507	0.01	514	0.01	-2.14
redir-httpd	506	0.01	513	0.01	-2.15
WebSTAR	500	0.01	508	0.01	-2.36
BIG-IP	466	0.01	466	0.01	-0.79
DeleGate	456	0.01	453	0.01	-0.14
WebServer	449	0.01	421	0.01	5.81
FC	448	0.01	408	0.01	8.93
WebLogic	447	0.01	438	0.01	1.25
Server	431	0.01	429	0.01	-0.33
AOLserver	427	0.01	417	0.01	1.59
CloudFront	408	0.01	475	0.01	-14.79
Abyss	398	0.01	400	0.01	-1.29
GlassFish	396	0.01	380	0.01	3.38
WebSphere	382	0.01	378	0.01	0.26
WebSite	370	0.01	370	0.01	-0.79
WebSitePro	357	0.01	357	0.01	-0.79
EdgePrism	356	0.01	366	0.01	-3.50
Secured	343	0.01	368	0.01	-7.53
JRun	334	0.01	341	0.01	-2.83
Unknown	318	0.01	250	0.01	26.19
Indy	316	0.01	310	0.01	1.13
DinaHTTPd	316	0.01	301	0.01	4.15
SAP	314	0.01	307	0.01	1.47
Roxen	306	0.01	302	0.01	0.52
4D_WebSTAR_S	300	0.01	303	0.01	-1.78
OpenCms	285	0.01	283	0.01	-0.09
cloudflare-nginx	277	0.01	288	0.01	-4.58
RomPager	276	0.01	281	0.01	-2.56
Power	275	0.01	292	0.01	-6.57
SW	265	0.01	300	0.01	-12.37
""	262	0.01	261	0.01	-0.41
IIS	254	0.01	248	0.01	1.61
SAMBAR	251	0.01	249	0.01	0.00
PWS	248	0.01	0	0.00	N/A
IIS6	243	0.01	243	0.01	-0.79
WS	230	0.00	229	0.00	-0.36
Oracle-iPlanet-Web-Server	218	0.00	0	0.00	N/A
HTTP	216	0.00	211	0.00	1.56
NetBox	213	0.00	211	0.00	0.15
WebSEAL	211	0.00	206	0.00	1.62

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.