You are viewing an outdated report.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) 64,120,281 hostnames, but only 4,696,053 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	March 2021 Count	March 2021 %	February 2021 Count	February 2021 %	Growth %
Apache	1,927,023	41.03	1,953,506	41.23	-0.47
nginx	1,253,432	26.69	1,256,223	26.51	0.67
Microsoft-IIS	442,144	9.42	452,761	9.56	-1.47
null	337,570	7.19	338,503	7.14	0.62
Microsoft-HTTPAPI	185,898	3.96	189,807	4.01	-1.18
cloudflare	101,808	2.17	101,680	2.15	1.02
LiteSpeed	73,153	1.56	72,497	1.53	1.81
Nginx	56,047	1.19	55,310	1.17	2.24
IdeaWebServer	39,589	0.84	39,877	0.84	0.17
BigIP	29,334	0.62	29,347	0.62	0.85
openresty	25,650	0.55	26,185	0.55	-1.17
awselb	25,482	0.54	24,702	0.52	4.08
Tengine	20,916	0.45	19,802	0.42	6.57
Apache-Coyote	18,903	0.40	18,922	0.40	0.79
AkamaiGHost	18,557	0.40	18,080	0.38	3.56
AmazonS3	14,469	0.31	13,920	0.29	4.87
CloudFront	8,503	0.18	8,892	0.19	-3.52
Flywheel	6,548	0.14	6,757	0.14	-2.23
nginx-rc	5,523	0.12	5,702	0.12	-2.27
wts	4,762	0.10	5,208	0.11	-7.75
nginx-reuseport	4,157	0.09	4,159	0.09	0.85
lighttpd	4,076	0.09	4,148	0.09	-0.86
Varnish	4,029	0.09	4,143	0.09	-1.88
Caddy	3,226	0.07	3,047	0.06	6.82
Lotus-Domino	2,536	0.05	2,575	0.05	-0.63
EZproxy	2,508	0.05	2,528	0.05	0.10
Microsoft-Azure-Application-Gateway	1,596	0.03	1,540	0.03	4.56
WWW	1,531	0.03	1,568	0.03	-1.49
Safedog	1,469	0.03	1,372	0.03	8.03
Firewall	1,350	0.03	1,418	0.03	-3.94
Server	1,337	0.03	1,227	0.03	9.94
Cowboy	1,136	0.02	1,179	0.02	-2.79
ws-httpd	1,127	0.02	1,129	0.02	0.72
kangle	1,117	0.02	1,222	0.03	-7.77
scl	1,104	0.02	1,130	0.02	-1.43
AliyunOSS	1,074	0.02	1,093	0.02	-0.86
squid	1,073	0.02	1,098	0.02	-1.40
uvicorn	910	0.02	890	0.02	3.16
IIS	903	0.02	723	0.02	26.01
Icecast	891	0.02	894	0.02	0.56
VWebServer	866	0.02	816	0.02	7.08
IceWarp	800	0.02	805	0.02	0.27
ddos-guard	761	0.02	732	0.02	4.89
WDaemon	681	0.01	713	0.02	-3.63
o2switch-PowerBoost-v3	665	0.01	652	0.01	2.91
Destiny	649	0.01	658	0.01	-0.49
Kestrel	627	0.01	632	0.01	0.10
Resin	623	0.01	620	0.01	1.38
GlassFish	588	0.01	591	0.01	0.38
ScreenConnect	551	0.01	550	0.01	1.08
Prometheus	542	0.01	560	0.01	-2.35
Zope	518	0.01	532	0.01	-1.76
CHO	505	0.01	507	0.01	0.50
-	496	0.01	472	0.01	6.02
ATS	485	0.01	494	0.01	-0.94
redir-httpd	482	0.01	483	0.01	0.69
OpenBSD	476	0.01	471	0.01	1.97
sffe	463	0.01	551	0.01	-15.22
aruba-proxy	460	0.01	454	0.01	2.23
QRATOR	449	0.01	443	0.01	2.26
Oracle-Application-Server-10g	414	0.01	417	0.01	0.17
ECAcc	408	0.01	410	0.01	0.40
Web	405	0.01	414	0.01	-1.30
Rumpus	391	0.01	387	0.01	1.94
cloudflare-nginx	374	0.01	380	0.01	-0.70
IBM_HTTP_Server	366	0.01	372	0.01	-0.73
******	346	0.01	320	0.01	9.09
elb	330	0.01	310	0.01	7.40
UploadServer	330	0.01	337	0.01	-1.20
ghs	326	0.01	358	0.01	-8.12
cc-web	326	0.01	340	0.01	-3.26
EdgePrism	323	0.01	325	0.01	0.27
WildFly	322	0.01	312	0.01	4.13
LRBD-85ce592	320	0.01	320	0.01	0.89
web	318	0.01	330	0.01	-2.77
ddosx	311	0.01	309	0.01	1.55
E2EE	306	0.01	301	0.01	2.57
eClass	305	0.01	295	0.01	4.31
4D	301	0.01	299	0.01	1.57
CentOS	298	0.01	327	0.01	-8.05
Netscape-Enterprise	296	0.01	303	0.01	-1.44
nginx-upupw	291	0.01	309	0.01	-4.98
III	291	0.01	296	0.01	-0.81
CommuniGatePro	288	0.01	295	0.01	-1.50
MageStack-MagentoOS	287	0.01	280	0.01	3.42
YxlinkWAF	275	0.01	259	0.01	7.13
envoy	274	0.01	283	0.01	-2.31
shield	271	0.01	308	0.01	-11.23
WowzaStreamingEngine	269	0.01	277	0.01	-2.02
WVS	267	0.01	247	0.01	9.06
Werkzeug	265	0.01	260	0.01	2.83
none	262	0.01	246	0.01	7.46
ADM	260	0.01	251	0.01	4.51
awex	254	0.01	252	0.01	1.70
bfe	253	0.01	262	0.01	-2.57
kittenx	251	0.01	248	0.01	2.12
WAF	251	0.01	249	0.01	1.71
WebServer	247	0.01	0	0.00	N/A
Protected	247	0.01	282	0.01	-11.63
ECS	245	0.01	245	0.01	0.89

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.