You are viewing an outdated report. The latest version of this report was published on October 1st, 2024

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) 58,481,380 hostnames, but only 4,676,004 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	June 2021 Count	June 2021 %	May 2021 Count	May 2021 %	Growth %
Apache	1,871,764	40.03	1,889,238	40.46	-1.06
nginx	1,320,375	28.24	1,286,086	27.54	2.53
Microsoft-IIS	402,184	8.60	415,041	8.89	-3.23
null	354,675	7.59	354,746	7.60	-0.15
Microsoft-HTTPAPI	178,292	3.81	180,923	3.87	-1.58
cloudflare	99,706	2.13	100,007	2.14	-0.43
LiteSpeed	74,008	1.58	72,218	1.55	2.34
Nginx	65,594	1.40	62,583	1.34	4.67
IdeaWebServer	38,842	0.83	39,099	0.84	-0.79
BigIP	28,813	0.62	28,966	0.62	-0.66
awselb	28,005	0.60	25,761	0.55	8.57
openresty	21,778	0.47	21,156	0.45	2.80
Tengine	18,055	0.39	19,462	0.42	-7.35
Apache-Coyote	17,071	0.37	17,897	0.38	-4.74
AmazonS3	15,906	0.34	15,353	0.33	3.46
AkamaiGHost	14,170	0.30	17,719	0.38	-20.14
CloudFront	8,991	0.19	7,125	0.15	26.02
Flywheel	6,307	0.13	6,438	0.14	-2.16
nginx-rc	6,026	0.13	5,972	0.13	0.77
wts	4,953	0.11	5,045	0.11	-1.95
nginx-reuseport	4,151	0.09	4,165	0.09	-0.47
Varnish	3,947	0.08	3,984	0.09	-1.06
lighttpd	3,884	0.08	3,970	0.09	-2.30
aeserver	3,775	0.08	0	0.00	N/A
Caddy	3,483	0.07	3,357	0.07	3.62
EZproxy	2,454	0.05	2,483	0.05	-1.30
Lotus-Domino	2,405	0.05	2,443	0.05	-1.69
Microsoft-Azure-Application-Gateway	1,887	0.04	1,778	0.04	5.99
Safedog	1,378	0.03	1,817	0.04	-24.26
WWW	1,308	0.03	1,526	0.03	-14.40
Server	1,268	0.03	1,364	0.03	-7.16
scl	1,155	0.02	1,113	0.02	3.64
AliyunOSS	1,113	0.02	1,107	0.02	0.41
ws-httpd	1,084	0.02	1,006	0.02	7.61
squid	1,010	0.02	1,045	0.02	-3.48
Icecast	964	0.02	965	0.02	-0.24
Cowboy	903	0.02	1,069	0.02	-15.64
Firewall	879	0.02	979	0.02	-10.33
ddos-guard	797	0.02	776	0.02	2.57
IceWarp	791	0.02	798	0.02	-1.01
kangle	786	0.02	863	0.02	-9.04
VWebServer	759	0.02	855	0.02	-11.35
o2switch-PowerBoost-v3	705	0.02	691	0.01	1.89
-	618	0.01	493	0.01	25.19
Destiny	616	0.01	641	0.01	-4.03
WDaemon	613	0.01	633	0.01	-3.29
Kestrel	607	0.01	623	0.01	-2.70
IIS	585	0.01	730	0.02	-19.97
GlassFish	558	0.01	549	0.01	1.50
ScreenConnect	526	0.01	530	0.01	-0.89
Resin	518	0.01	559	0.01	-7.46
Prometheus	507	0.01	524	0.01	-3.37
ATS	493	0.01	442	0.01	11.39
aruba-proxy	488	0.01	469	0.01	3.91
OpenBSD	487	0.01	479	0.01	1.54
CHO	487	0.01	489	0.01	-0.54
redir-httpd	477	0.01	479	0.01	-0.55
Zope	476	0.01	498	0.01	-4.54
Web	472	0.01	435	0.01	8.36
QRATOR	462	0.01	461	0.01	0.08
sffe	419	0.01	494	0.01	-15.29
******	407	0.01	379	0.01	7.25
ECAcc	406	0.01	404	0.01	0.36
Oracle-Application-Server-10g	384	0.01	399	0.01	-3.89
elb	372	0.01	349	0.01	6.45
cloudflare-nginx	370	0.01	372	0.01	-0.67
Rumpus	366	0.01	367	0.01	-0.40
EdgePrism	356	0.01	358	0.01	-0.69
cc-web	339	0.01	334	0.01	1.36
WVS	339	0.01	312	0.01	8.51
UploadServer	325	0.01	336	0.01	-3.40
web	323	0.01	332	0.01	-2.84
LRBD-2004e49	323	0.01	0	0.00	N/A
IBM_HTTP_Server	322	0.01	333	0.01	-3.43
eClass	316	0.01	314	0.01	0.50
ddosx	313	0.01	315	0.01	-0.77
Netscape-Enterprise	300	0.01	302	0.01	-0.79
ghs	299	0.01	329	0.01	-9.24
WildFly	295	0.01	303	0.01	-2.77
4D	294	0.01	294	0.01	-0.13
envoy	292	0.01	295	0.01	-1.15
CommuniGatePro	284	0.01	281	0.01	0.93
Windows-Azure-Blob	280	0.01	266	0.01	5.12
MageStack-MagentoOS	273	0.01	277	0.01	-1.57
shield	270	0.01	269	0.01	0.24
CentOS	267	0.01	274	0.01	-2.68
bfe	266	0.01	269	0.01	-1.25
Werkzeug	264	0.01	247	0.01	6.74
istio-envoy	260	0.01	252	0.01	3.04
BitNinja	258	0.01	240	0.01	7.36
III	257	0.01	272	0.01	-5.64
awex	252	0.01	254	0.01	-0.92
ClausWeb-nginx	251	0.01	0	0.00	N/A
myracloud	249	0.01	243	0.01	2.33
kittenx	246	0.01	247	0.01	-0.54
WAF	245	0.01	238	0.01	2.80
WowzaStreamingEngine	244	0.01	254	0.01	-4.06
ECS	240	0.01	242	0.01	-0.96
none	237	0.01	251	0.01	-5.70
CloudWAF	235	0.01	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.