You are viewing an outdated report.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) 62,396,880 hostnames, but only 4,641,248 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	September 2021 Count	September 2021 %	August 2021 Count	August 2021 %	Growth %
Apache	1,813,070	39.06	1,829,505	39.16	-0.23
nginx	1,372,498	29.57	1,367,035	29.26	1.07
Microsoft-IIS	376,891	8.12	386,020	8.26	-1.71
null	372,890	8.03	376,176	8.05	-0.21
Microsoft-HTTPAPI	167,863	3.62	170,622	3.65	-0.96
cloudflare	100,559	2.17	100,195	2.14	1.04
LiteSpeed	75,570	1.63	74,907	1.60	1.56
Nginx	57,774	1.24	59,462	1.27	-2.19
IdeaWebServer	38,208	0.82	38,432	0.82	0.08
awselb	28,823	0.62	28,907	0.62	0.38
BigIP	28,219	0.61	28,290	0.61	0.42
openresty	21,500	0.46	21,659	0.46	-0.07
Tengine	17,382	0.37	19,302	0.41	-9.34
AmazonS3	16,543	0.36	16,569	0.35	0.51
Apache-Coyote	15,892	0.34	16,303	0.35	-1.87
AkamaiGHost	15,266	0.33	15,983	0.34	-3.84
CloudFront	7,180	0.15	7,431	0.16	-2.73
nginx-rc	6,271	0.14	6,200	0.13	1.82
Flywheel	5,991	0.13	6,062	0.13	-0.51
wts	5,405	0.12	5,200	0.11	4.64
nginx-reuseport	4,072	0.09	4,116	0.09	-0.40
Varnish	3,820	0.08	4,044	0.09	-4.90
lighttpd	3,774	0.08	3,836	0.08	-0.96
Caddy	3,638	0.08	3,568	0.08	2.65
aeserver	3,586	0.08	3,532	0.08	2.21
EZproxy	2,406	0.05	2,417	0.05	0.21
Lotus-Domino	2,324	0.05	2,344	0.05	-0.19
Microsoft-Azure-Application-Gateway	2,135	0.05	2,052	0.04	4.74
Server	1,238	0.03	1,305	0.03	-4.50
Safedog	1,202	0.03	1,151	0.02	5.13
scl	1,172	0.03	1,161	0.02	1.63
AliyunOSS	1,070	0.02	1,094	0.02	-1.54
squid	955	0.02	1,001	0.02	-3.95
WWW	941	0.02	1,064	0.02	-10.97
Icecast	941	0.02	949	0.02	-0.18
ddos-guard	861	0.02	820	0.02	5.70
-	798	0.02	773	0.02	3.93
VWebServer	768	0.02	787	0.02	-1.76
IceWarp	768	0.02	780	0.02	-0.88
o2switch-PowerBoost-v3	730	0.02	724	0.02	1.51
kangle	724	0.02	748	0.02	-2.56
Kestrel	689	0.01	647	0.01	7.21
WDaemon	586	0.01	588	0.01	0.33
Destiny	583	0.01	584	0.01	0.50
Cowboy	565	0.01	685	0.01	-16.96
IIS	536	0.01	556	0.01	-2.95
ATS	515	0.01	491	0.01	5.59
GlassFish	514	0.01	525	0.01	-1.44
ws-httpd	511	0.01	750	0.02	-31.41
ScreenConnect	511	0.01	512	0.01	0.47
OpenBSD	496	0.01	496	0.01	0.67
Resin	494	0.01	496	0.01	0.27
aruba-proxy	490	0.01	490	0.01	0.67
Firewall	486	0.01	513	0.01	-4.63
CHO	477	0.01	480	0.01	0.04
redir-httpd	472	0.01	472	0.01	0.67
QRATOR	465	0.01	467	0.01	0.24
Zope	452	0.01	459	0.01	-0.86
Web	444	0.01	456	0.01	-1.98
ECAcc	410	0.01	412	0.01	0.18
sffe	405	0.01	547	0.01	-25.46
elb	400	0.01	395	0.01	1.95
******	390	0.01	399	0.01	-1.60
WVS	380	0.01	354	0.01	8.07
Swan	375	0.01	0	0.00	N/A
cloudflare-nginx	361	0.01	358	0.01	1.51
Oracle-Application-Server-10g	355	0.01	375	0.01	-4.70
EdgePrism	353	0.01	354	0.01	0.39
Rumpus	350	0.01	357	0.01	-1.30
eClass	338	0.01	324	0.01	5.02
cc-web	336	0.01	332	0.01	1.88
web	332	0.01	325	0.01	2.84
LRBD-2004e49	324	0.01	319	0.01	2.25
UploadServer	323	0.01	329	0.01	-1.16
uvicorn	312	0.01	322	0.01	-2.46
ddosx	303	0.01	301	0.01	1.34
envoy	299	0.01	291	0.01	3.44
yunjiasu	296	0.01	0	0.00	N/A
Netscape-Enterprise	288	0.01	299	0.01	-3.03
Windows-Azure-Blob	287	0.01	277	0.01	4.31
4D	286	0.01	294	0.01	-2.07
IBM_HTTP_Server	285	0.01	286	0.01	0.32
istio-envoy	284	0.01	276	0.01	3.59
ghs	283	0.01	287	0.01	-0.73
CloudWAF	277	0.01	273	0.01	2.15
CommuniGatePro	275	0.01	280	0.01	-1.13
WildFly	266	0.01	282	0.01	-5.04
MageStack-MagentoOS	266	0.01	270	0.01	-0.82
none	265	0.01	261	0.01	2.21
ias	264	0.01	251	0.01	5.89
bfe	264	0.01	266	0.01	-0.09
myracloud	257	0.01	255	0.01	1.46
awex	254	0.01	252	0.01	1.47
kittenx	253	0.01	252	0.01	1.07
CentOS	249	0.01	260	0.01	-3.59
WowzaStreamingEngine	244	0.01	250	0.01	-1.74
ECS	235	0.01	237	0.01	-0.18
Werkzeug	232	0.00	0	0.00	N/A
rdwr	226	0.00	0	0.00	N/A
FlowBalancer	226	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.