You are viewing an outdated report.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) 64,793,109 hostnames, but only 4,738,068 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	February 2021 Count	February 2021 %	January 2021 Count	January 2021 %	Growth %
Apache	1,953,506	41.23	1,968,346	40.89	0.82
nginx	1,256,223	26.51	1,244,836	25.86	2.52
Microsoft-IIS	452,761	9.56	463,145	9.62	-0.69
null	338,503	7.14	340,213	7.07	1.08
Microsoft-HTTPAPI	189,807	4.01	195,393	4.06	-1.32
cloudflare	101,680	2.15	149,422	3.10	-30.87
LiteSpeed	72,497	1.53	71,223	1.48	3.41
Nginx	55,310	1.17	56,696	1.18	-0.89
IdeaWebServer	39,877	0.84	40,259	0.84	0.62
BigIP	29,347	0.62	29,334	0.61	1.63
openresty	26,185	0.55	25,904	0.54	2.69
awselb	24,702	0.52	24,025	0.50	4.45
Tengine	19,802	0.42	21,124	0.44	-4.77
Apache-Coyote	18,922	0.40	19,620	0.41	-2.03
AkamaiGHost	18,080	0.38	20,573	0.43	-10.72
AmazonS3	13,920	0.29	13,719	0.29	3.08
CloudFront	8,892	0.19	8,770	0.18	3.00
Flywheel	6,757	0.14	6,888	0.14	-0.34
nginx-rc	5,702	0.12	5,601	0.12	3.42
wts	5,208	0.11	5,100	0.11	3.74
nginx-reuseport	4,159	0.09	4,156	0.09	1.66
lighttpd	4,148	0.09	4,218	0.09	-0.10
Varnish	4,143	0.09	4,164	0.09	1.08
Caddy	3,047	0.06	3,003	0.06	3.08
Lotus-Domino	2,575	0.05	2,631	0.05	-0.57
EZproxy	2,528	0.05	2,536	0.05	1.27
WWW	1,568	0.03	1,659	0.03	-3.98
Microsoft-Azure-Application-Gateway	1,540	0.03	1,464	0.03	6.86
Firewall	1,418	0.03	2,694	0.06	-46.53
Safedog	1,372	0.03	1,193	0.02	16.83
Server	1,227	0.03	1,246	0.03	0.04
kangle	1,222	0.03	1,315	0.03	-5.60
Cowboy	1,179	0.02	1,173	0.02	2.11
scl	1,130	0.02	1,105	0.02	3.89
ws-httpd	1,129	0.02	1,138	0.02	0.79
squid	1,098	0.02	1,103	0.02	1.13
AliyunOSS	1,093	0.02	1,151	0.02	-3.53
Icecast	894	0.02	884	0.02	2.74
uvicorn	890	0.02	1,407	0.03	-35.74
VWebServer	816	0.02	846	0.02	-2.01
IceWarp	805	0.02	814	0.02	0.47
ddos-guard	732	0.02	722	0.01	3.00
IIS	723	0.02	721	0.01	1.87
WDaemon	713	0.02	738	0.02	-1.85
Destiny	658	0.01	668	0.01	0.07
o2switch-PowerBoost-v3	652	0.01	639	0.01	3.66
Kestrel	632	0.01	621	0.01	3.39
Resin	620	0.01	646	0.01	-2.50
GlassFish	591	0.01	610	0.01	-1.58
Prometheus	560	0.01	575	0.01	-1.06
sffe	551	0.01	516	0.01	8.48
ScreenConnect	550	0.01	569	0.01	-1.80
Zope	532	0.01	539	0.01	0.27
CHO	507	0.01	600	0.01	-14.16
ATS	494	0.01	498	0.01	0.77
redir-httpd	483	0.01	483	0.01	1.59
-	472	0.01	462	0.01	3.79
OpenBSD	471	0.01	483	0.01	-0.94
aruba-proxy	454	0.01	395	0.01	16.76
QRATOR	443	0.01	435	0.01	3.46
Oracle-Application-Server-10g	417	0.01	423	0.01	0.15
Web	414	0.01	404	0.01	4.10
ECAcc	410	0.01	411	0.01	1.34
Rumpus	387	0.01	391	0.01	0.55
cloudflare-nginx	380	0.01	385	0.01	0.27
IBM_HTTP_Server	372	0.01	395	0.01	-4.33
ghs	358	0.01	362	0.01	0.47
cc-web	340	0.01	337	0.01	2.49
UploadServer	337	0.01	329	0.01	4.06
web	330	0.01	336	0.01	-0.23
CentOS	327	0.01	359	0.01	-7.47
EdgePrism	325	0.01	331	0.01	-0.25
LRBD-85ce592	320	0.01	0	0.00	N/A
******	320	0.01	344	0.01	-5.50
WildFly	312	0.01	323	0.01	-1.87
elb	310	0.01	308	0.01	2.25
nginx-upupw	309	0.01	305	0.01	2.92
ddosx	309	0.01	302	0.01	3.94
shield	308	0.01	312	0.01	0.29
Netscape-Enterprise	303	0.01	286	0.01	7.63
E2EE	301	0.01	508	0.01	-39.81
4D	299	0.01	300	0.01	1.25
III	296	0.01	311	0.01	-3.31
eClass	295	0.01	292	0.01	2.63
CommuniGatePro	295	0.01	300	0.01	-0.10
envoy	283	0.01	271	0.01	6.09
Protected	282	0.01	285	0.01	0.52
MageStack-MagentoOS	280	0.01	289	0.01	-1.58
WowzaStreamingEngine	277	0.01	281	0.01	0.14
bfe	262	0.01	277	0.01	-3.91
Werkzeug	260	0.01	272	0.01	-2.89
YxlinkWAF	259	0.01	325	0.01	-19.04
awex	252	0.01	253	0.01	1.19
ADM	251	0.01	0	0.00	N/A
WAF	249	0.01	255	0.01	-0.80
kittenx	248	0.01	257	0.01	-1.97
WVS	247	0.01	0	0.00	N/A
none	246	0.01	251	0.01	-0.44
ECS	245	0.01	0	0.00	N/A
gvs	241	0.01	250	0.01	-2.07

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.