You are viewing an outdated report.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) 62,579,689 hostnames, but only 4,599,474 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	October 2021 Count	October 2021 %	September 2021 Count	September 2021 %	Growth %
Apache	1,787,939	38.87	1,813,070	39.06	-0.49
nginx	1,377,352	29.95	1,372,498	29.57	1.27
null	374,204	8.14	372,890	8.03	1.26
Microsoft-IIS	370,110	8.05	376,891	8.12	-0.91
Microsoft-HTTPAPI	163,297	3.55	167,863	3.62	-1.84
cloudflare	99,444	2.16	100,559	2.17	-0.21
LiteSpeed	71,648	1.56	75,570	1.63	-4.33
Nginx	53,208	1.16	57,774	1.24	-7.07
IdeaWebServer	37,992	0.83	38,208	0.82	0.34
awselb	29,472	0.64	28,823	0.62	3.18
BigIP	28,176	0.61	28,219	0.61	0.75
openresty	20,667	0.45	21,500	0.46	-3.00
AmazonS3	16,588	0.36	16,543	0.36	1.18
Tengine	16,353	0.36	17,382	0.37	-5.07
AkamaiGHost	15,634	0.34	15,266	0.33	3.34
Apache-Coyote	15,271	0.33	15,892	0.34	-3.03
CloudFront	7,079	0.15	7,180	0.15	-0.51
nginx-rc	6,307	0.14	6,271	0.14	1.49
Flywheel	5,919	0.13	5,991	0.13	-0.30
wts	5,338	0.12	5,405	0.12	-0.34
nginx-reuseport	4,067	0.09	4,072	0.09	0.78
lighttpd	3,750	0.08	3,774	0.08	0.27
Caddy	3,683	0.08	3,638	0.08	2.16
Varnish	3,592	0.08	3,820	0.08	-5.11
aeserver	2,476	0.05	3,586	0.08	-30.33
EZproxy	2,379	0.05	2,406	0.05	-0.22
Lotus-Domino	2,288	0.05	2,324	0.05	-0.65
Microsoft-Azure-Application-Gateway	2,216	0.05	2,135	0.05	4.74
Safedog	1,631	0.04	1,202	0.03	36.92
BitNinja	1,463	0.03	0	0.00	N/A
scl	1,172	0.03	1,172	0.03	0.91
Server	1,114	0.02	1,238	0.03	-9.20
AliyunOSS	1,076	0.02	1,070	0.02	1.47
squid	952	0.02	955	0.02	0.59
Icecast	950	0.02	941	0.02	1.87
kangle	931	0.02	724	0.02	29.76
ddos-guard	887	0.02	861	0.02	3.96
WWW	880	0.02	941	0.02	-5.63
-	783	0.02	798	0.02	-0.99
Kestrel	765	0.02	689	0.01	12.04
IceWarp	765	0.02	768	0.02	0.51
VWebServer	760	0.02	768	0.02	-0.14
o2switch-PowerBoost-v3	738	0.02	730	0.02	2.01
WDaemon	567	0.01	586	0.01	-2.36
Destiny	556	0.01	583	0.01	-3.77
Cowboy	519	0.01	565	0.01	-7.31
GlassFish	513	0.01	514	0.01	0.71
ScreenConnect	508	0.01	511	0.01	0.32
IIS	505	0.01	536	0.01	-4.93
aruba-proxy	502	0.01	490	0.01	3.38
OpenBSD	489	0.01	496	0.01	-0.52
CHO	472	0.01	477	0.01	-0.15
ATS	472	0.01	515	0.01	-7.52
redir-httpd	470	0.01	472	0.01	0.48
QRATOR	470	0.01	465	0.01	1.99
Resin	468	0.01	494	0.01	-4.40
Web	445	0.01	444	0.01	1.14
Zope	441	0.01	452	0.01	-1.55
Firewall	433	0.01	486	0.01	-10.10
ECAcc	419	0.01	410	0.01	3.12
sffe	402	0.01	405	0.01	0.16
Swan	398	0.01	375	0.01	7.10
elb	390	0.01	400	0.01	-1.61
WVS	387	0.01	380	0.01	2.77
web	353	0.01	332	0.01	7.29
******	353	0.01	390	0.01	-8.67
cloudflare-nginx	351	0.01	361	0.01	-1.89
Oracle-Application-Server-10g	349	0.01	355	0.01	-0.80
Rumpus	348	0.01	350	0.01	0.33
EdgePrism	342	0.01	353	0.01	-2.24
eClass	341	0.01	338	0.01	1.80
cc-web	338	0.01	336	0.01	1.51
yunjiasu	337	0.01	296	0.01	14.89
UploadServer	327	0.01	323	0.01	2.16
LRBD-e6a1775	322	0.01	0	0.00	N/A
uvicorn	311	0.01	312	0.01	0.58
envoy	305	0.01	299	0.01	2.93
ddosx	302	0.01	303	0.01	0.58
istio-envoy	298	0.01	284	0.01	5.88
Windows-Azure-Blob	290	0.01	287	0.01	1.96
none	284	0.01	265	0.01	8.14
4D	284	0.01	286	0.01	0.20
Netscape-Enterprise	283	0.01	288	0.01	-0.84
ws-httpd	278	0.01	511	0.01	-45.10
CommuniGatePro	273	0.01	275	0.01	0.17
ghs	272	0.01	283	0.01	-3.01
IBM_HTTP_Server	271	0.01	285	0.01	-4.05
MageStack-MagentoOS	270	0.01	266	0.01	2.43
bfe	264	0.01	264	0.01	0.91
WildFly	263	0.01	266	0.01	-0.23
ias	259	0.01	264	0.01	-1.00
kittenx	254	0.01	253	0.01	1.31
awex	253	0.01	254	0.01	0.51
myracloud	251	0.01	257	0.01	-1.45
Werkzeug	241	0.01	232	0.00	4.82
CentOS	240	0.01	249	0.01	-2.74
WowzaStreamingEngine	239	0.01	244	0.01	-1.16
rdwr	234	0.01	226	0.00	4.48
FlowBalancer	231	0.01	226	0.00	3.14
ECS	229	0.00	235	0.01	-1.67

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.