You are viewing an outdated report. The latest version of this report was published on September 1st, 2021

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) 68,964,438 hostnames, but only 5,435,313 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 2020 Count	February 2020 %	January 2020 Count	January 2020 %	Growth %
Apache	2,162,219	39.78	2,169,399	40.23	-1.13
nginx	1,278,690	23.53	1,253,216	23.24	1.22
Microsoft-IIS	767,391	14.12	755,287	14.01	0.79
null	352,844	6.49	348,774	6.47	0.36
Microsoft-HTTPAPI	285,690	5.26	289,501	5.37	-2.10
cloudflare	154,328	2.84	153,381	2.84	-0.18
LiteSpeed	60,459	1.11	59,606	1.11	0.62
IdeaWebServer	43,168	0.79	43,520	0.81	-1.60
Nginx	41,455	0.76	34,357	0.64	19.70
Tengine	39,426	0.73	38,066	0.71	2.75
BigIP	29,685	0.55	29,849	0.55	-1.34
Apache-Coyote	25,796	0.47	26,462	0.49	-3.29
AkamaiGHost	19,957	0.37	15,944	0.30	24.17
openresty	18,396	0.34	17,810	0.33	2.47
awselb	14,089	0.26	12,749	0.24	9.63
AmazonS3	9,581	0.18	11,786	0.22	-19.36
Flywheel	8,611	0.16	8,940	0.17	-4.45
CloudFront	6,497	0.12	6,546	0.12	-1.54
wts	5,426	0.10	5,417	0.10	-0.63
lighttpd	4,884	0.09	5,021	0.09	-3.50
nginx-reuseport	4,142	0.08	4,066	0.08	1.06
nginx-rc	3,984	0.07	3,790	0.07	4.28
Varnish	3,971	0.07	4,112	0.08	-4.20
Lotus-Domino	3,186	0.06	3,254	0.06	-2.87
Safedog	2,759	0.05	2,150	0.04	27.30
EZproxy	2,649	0.05	2,642	0.05	-0.53
WWW	2,494	0.05	2,524	0.05	-1.98
Caddy	2,326	0.04	2,278	0.04	1.29
kangle	2,012	0.04	1,964	0.04	1.63
Cowboy	1,481	0.03	1,494	0.03	-1.66
squid	1,395	0.03	1,421	0.03	-2.61
Firewall	1,282	0.02	1,172	0.02	8.51
ws-httpd	1,173	0.02	1,172	0.02	-0.71
IIS	1,140	0.02	1,358	0.03	-16.72
Resin	1,024	0.02	1,029	0.02	-1.28
scl	1,009	0.02	996	0.02	0.50
nginx-clojure	942	0.02	898	0.02	4.06
AliyunOSS	906	0.02	905	0.02	-0.69
-	905	0.02	867	0.02	3.55
IceWarp	901	0.02	923	0.02	-3.16
Icecast	898	0.02	883	0.02	0.89
YxlinkWAF	854	0.02	883	0.02	-4.06
WDaemon	815	0.01	821	0.02	-1.52
Server	792	0.01	778	0.01	0.99
Destiny	770	0.01	778	0.01	-1.82
VWebServer	745	0.01	759	0.01	-2.63
GlassFish	735	0.01	752	0.01	-3.04
Zope	687	0.01	707	0.01	-3.60
ScreenConnect	663	0.01	676	0.01	-2.71
CHO	642	0.01	652	0.01	-2.32
sffe	639	0.01	717	0.01	-11.59
Kestrel	628	0.01	624	0.01	-0.16
CentOS	571	0.01	601	0.01	-5.75
IBM_HTTP_Server	570	0.01	589	0.01	-4.00
ECAcc	547	0.01	550	0.01	-1.34
Oracle-Application-Server-10g	529	0.01	537	0.01	-2.28
Microsoft-Azure-Application-Gateway	488	0.01	414	0.01	16.93
redir-httpd	487	0.01	487	0.01	-0.80
ngjit	486	0.01	460	0.01	4.81
o2switch-PowerBoost-v3	483	0.01	0	0.00	N/A
Rumpus	472	0.01	483	0.01	-3.06
III	472	0.01	491	0.01	-4.64
EdgePrism	465	0.01	436	0.01	5.80
ATS	450	0.01	451	0.01	-1.02
OpenBSD	449	0.01	453	0.01	-1.67
QRATOR	412	0.01	406	0.01	0.67
Web	409	0.01	406	0.01	-0.06
aruba-proxy	384	0.01	376	0.01	1.31
WildFly	366	0.01	372	0.01	-2.40
Protected	350	0.01	358	0.01	-3.01
cc-web	348	0.01	346	0.01	-0.22
TornadoServer	348	0.01	357	0.01	-3.30
WAF	346	0.01	367	0.01	-6.47
shield	330	0.01	303	0.01	8.04
4D	330	0.01	339	0.01	-3.43
MageStack-MagentoOS	327	0.01	332	0.01	-2.29
CommuniGatePro	327	0.01	327	0.01	-0.80
LRBD-c148be0	326	0.01	327	0.01	-1.10
unknown	318	0.01	323	0.01	-2.33
WebServer	313	0.01	322	0.01	-3.57
web	308	0.01	334	0.01	-8.52
WowzaStreamingEngine	308	0.01	315	0.01	-3.00
Oracle-Application-Server-11g	307	0.01	329	0.01	-7.43
Netscape-Enterprise	306	0.01	285	0.01	6.51
ghs	301	0.01	302	0.01	-1.13
Werkzeug	299	0.01	302	0.01	-1.78
ECS	292	0.01	295	0.01	-1.81
yunjiasu-nginx	291	0.01	281	0.01	2.73
Prometheus	288	0.01	259	0.00	10.31
UploadServer	273	0.01	264	0.00	2.58
httpd	270	0.00	270	0.01	-0.80
*****************	268	0.00	276	0.01	-3.67
F5aaS	267	0.00	266	0.00	-0.42
ECD	262	0.00	260	0.00	-0.03
myracloud	259	0.00	256	0.00	0.37
SonicWALL	256	0.00	257	0.00	-1.18
awex	254	0.00	254	0.00	-0.80
cloudflare-nginx	250	0.00	0	0.00	N/A
bfe	243	0.00	250	0.00	-3.57
gunicorn	242	0.00	242	0.00	-0.80

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.