You are viewing an outdated report.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) 62,631,920 hostnames, but only 4,672,408 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 2021 Count	August 2021 %	July 2021 Count	July 2021 %	Growth %
Apache	1,829,505	39.16	1,848,674	39.56	-1.03
nginx	1,367,035	29.26	1,349,291	28.88	1.32
Microsoft-IIS	386,020	8.26	393,217	8.42	-1.82
null	376,176	8.05	366,643	7.85	2.61
Microsoft-HTTPAPI	170,622	3.65	173,929	3.72	-1.89
cloudflare	100,195	2.14	100,308	2.15	-0.11
LiteSpeed	74,907	1.60	73,799	1.58	1.51
Nginx	59,462	1.27	57,577	1.23	3.28
IdeaWebServer	38,432	0.82	38,614	0.83	-0.46
awselb	28,907	0.62	27,799	0.59	3.99
BigIP	28,290	0.61	28,543	0.61	-0.88
openresty	21,659	0.46	21,775	0.47	-0.53
Tengine	19,302	0.41	18,595	0.40	3.81
AmazonS3	16,569	0.35	16,246	0.35	2.00
Apache-Coyote	16,303	0.35	16,640	0.36	-2.02
AkamaiGHost	15,983	0.34	16,735	0.36	-4.49
CloudFront	7,431	0.16	7,343	0.16	1.21
nginx-rc	6,200	0.13	6,108	0.13	1.51
Flywheel	6,062	0.13	6,150	0.13	-1.42
wts	5,200	0.11	4,989	0.11	4.24
nginx-reuseport	4,116	0.09	4,142	0.09	-0.62
Varnish	4,044	0.09	3,992	0.09	1.31
lighttpd	3,836	0.08	3,836	0.08	0.01
Caddy	3,568	0.08	3,636	0.08	-1.86
aeserver	3,532	0.08	3,664	0.08	-3.60
EZproxy	2,417	0.05	2,432	0.05	-0.61
Lotus-Domino	2,344	0.05	2,375	0.05	-1.30
Microsoft-Azure-Application-Gateway	2,052	0.04	1,967	0.04	4.33
Server	1,305	0.03	1,302	0.03	0.24
scl	1,161	0.02	1,162	0.02	-0.08
Safedog	1,151	0.02	1,501	0.03	-23.31
AliyunOSS	1,094	0.02	1,089	0.02	0.47
WWW	1,064	0.02	1,460	0.03	-27.12
squid	1,001	0.02	989	0.02	1.22
Icecast	949	0.02	952	0.02	-0.31
ddos-guard	820	0.02	814	0.02	0.74
VWebServer	787	0.02	747	0.02	5.36
IceWarp	780	0.02	790	0.02	-1.26
-	773	0.02	653	0.01	18.39
ws-httpd	750	0.02	1,006	0.02	-25.44
kangle	748	0.02	746	0.02	0.28
o2switch-PowerBoost-v3	724	0.02	714	0.02	1.41
Cowboy	685	0.01	807	0.02	-15.11
Kestrel	647	0.01	617	0.01	4.87
WDaemon	588	0.01	607	0.01	-3.12
Destiny	584	0.01	590	0.01	-1.01
IIS	556	0.01	575	0.01	-3.30
sffe	547	0.01	442	0.01	23.76
GlassFish	525	0.01	532	0.01	-1.31
Firewall	513	0.01	558	0.01	-8.06
ScreenConnect	512	0.01	516	0.01	-0.77
Resin	496	0.01	508	0.01	-2.36
OpenBSD	496	0.01	486	0.01	2.07
ATS	491	0.01	482	0.01	1.87
aruba-proxy	490	0.01	489	0.01	0.21
CHO	480	0.01	484	0.01	-0.82
redir-httpd	472	0.01	473	0.01	-0.20
QRATOR	467	0.01	444	0.01	5.19
Zope	459	0.01	471	0.01	-2.54
Web	456	0.01	474	0.01	-3.79
ECAcc	412	0.01	411	0.01	0.25
******	399	0.01	375	0.01	6.41
elb	395	0.01	385	0.01	2.60
Oracle-Application-Server-10g	375	0.01	379	0.01	-1.05
cloudflare-nginx	358	0.01	366	0.01	-2.18
Rumpus	357	0.01	361	0.01	-1.10
WVS	354	0.01	339	0.01	4.43
EdgePrism	354	0.01	358	0.01	-1.11
cc-web	332	0.01	339	0.01	-2.06
UploadServer	329	0.01	331	0.01	-0.60
web	325	0.01	328	0.01	-0.91
eClass	324	0.01	318	0.01	1.89
uvicorn	322	0.01	329	0.01	-2.12
LRBD-2004e49	319	0.01	322	0.01	-0.92
ddosx	301	0.01	304	0.01	-0.98
Netscape-Enterprise	299	0.01	300	0.01	-0.33
4D	294	0.01	288	0.01	2.09
envoy	291	0.01	292	0.01	-0.34
ghs	287	0.01	291	0.01	-1.37
IBM_HTTP_Server	286	0.01	303	0.01	-5.60
WildFly	282	0.01	286	0.01	-1.39
CommuniGatePro	280	0.01	277	0.01	1.09
Windows-Azure-Blob	277	0.01	278	0.01	-0.35
istio-envoy	276	0.01	277	0.01	-0.35
CloudWAF	273	0.01	0	0.00	N/A
MageStack-MagentoOS	270	0.01	273	0.01	-1.09
bfe	266	0.01	255	0.01	4.32
shield	263	0.01	263	0.01	0.01
none	261	0.01	253	0.01	3.17
CentOS	260	0.01	265	0.01	-1.88
WAF	256	0.01	253	0.01	1.19
myracloud	255	0.01	255	0.01	0.01
kittenx	252	0.01	247	0.01	2.03
awex	252	0.01	253	0.01	-0.39
ias	251	0.01	244	0.01	2.88
WowzaStreamingEngine	250	0.01	253	0.01	-1.18
III	237	0.01	245	0.01	-3.26
ECS	237	0.01	237	0.01	0.01
SonicWALL	233	0.00	0	0.00	N/A
wits	230	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.