Report Description

This report, much like our original certs and CAs report, focuses on issuers of SSL enabling certificates found on web servers. Unlike our original report, however, this report has a couple of key differences to it:

• Reports on top 100 CAs. The original report only paid attention to the major CAs at the time the report was produced. This report lists the top 100 CAs for the month. You will find here many self-signing organizations such as universities, telecommunications firms, etc.
• Uses issuer name as identifier. Our original report only counted a certificate towards an organization if we were able to prove, by virtue of verifying the key, that the organization in question actually signed the certificate. This had a notable problem with it - we don't always have the public key of the CA. In at least one case, a CA doesn't make their public key available unless you sign a license agreement.

  This report doesn't have that problem, since it only uses the issuer Organization Name to uniquely identify the issuing CA.

CA	September 2021 Count	September 2021 %	August 2021 Count	August 2021 %	Growth %
Let's Encrypt	1,523,633	28.20	1,529,965	28.12	0.30
Sectigo Limited	1,247,232	23.09	1,248,775	22.95	0.59
DigiCert	578,851	10.72	588,435	10.82	-0.92
GlobalSign nv-sa	255,571	4.73	257,439	4.73	-0.01
Unknown	200,105	3.70	199,430	3.67	1.06
GoDaddy.com, Inc.	177,871	3.29	178,594	3.28	0.31
Amazon	159,192	2.95	159,740	2.94	0.37
cPanel, Inc.	136,161	2.52	140,911	2.59	-2.68
Google Trust Services LLC	92,069	1.70	89,869	1.65	3.18
Plesk	80,538	1.49	81,520	1.50	-0.50
SomeOrganization	74,375	1.38	75,147	1.38	-0.32
Starfield Technologies, Inc.	59,575	1.10	59,769	1.10	0.39
COMODO CA Limited	58,082	1.08	63,474	1.17	-7.84
Unizeto Technologies S.A.	45,735	0.85	45,092	0.83	2.15
Cloudflare, Inc.	44,487	0.82	42,509	0.78	5.40
Actalis S.p.A.	43,038	0.80	42,809	0.79	1.25
GoGetSSL	28,957	0.54	29,024	0.53	0.48
Parallels	27,264	0.50	27,584	0.51	-0.45
GEANT Vereniging	22,733	0.42	22,188	0.41	3.19
Internet2	22,715	0.42	22,940	0.42	-0.27
TrustAsia Technologies, Inc.	22,164	0.41	21,931	0.40	1.79
Odin	21,479	0.40	21,727	0.40	-0.43
Gandi	20,842	0.39	20,784	0.38	1.00
Japan Registry Services Co., Ltd.	19,165	0.35	19,145	0.35	0.82
ddos-guard	17,578	0.33	17,170	0.32	3.11
Soluciones Corporativas IP, SL	16,144	0.30	16,213	0.30	0.29
SH	15,975	0.30	15,839	0.29	1.58
Apache HTTP Server	15,935	0.29	15,939	0.29	0.69
Cybertrust Japan Co., Ltd.	15,812	0.29	13,041	0.24	22.12
Entrust, Inc.	14,094	0.26	14,206	0.26	-0.08
SECOM Trust Systems CO.,LTD.	13,917	0.26	13,948	0.26	0.49
TERENA	12,770	0.24	13,361	0.25	-3.74
Internet Widgits Pty Ltd	12,344	0.23	12,399	0.23	0.27
Test Self SSL Company	12,084	0.22	11,991	0.22	1.50
Microsoft Corporation	10,279	0.19	10,290	0.19	0.61
Default Company Ltd	10,169	0.19	10,258	0.19	-0.16
none	9,924	0.18	10,111	0.19	-1.15
GeoTrust Inc.	8,583	0.16	8,759	0.16	-1.31
FASTVPS	7,342	0.14	7,233	0.13	2.23
ZeroSSL	6,921	0.13	6,374	0.12	9.36
KAGOYA-JAPAN	6,755	0.13	6,769	0.12	0.51
QuoVadis Limited	6,421	0.12	6,707	0.12	-3.58
XX	6,256	0.12	6,341	0.12	-0.63
Network Solutions L.L.C.	5,901	0.11	6,005	0.11	-1.03
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	5,756	0.11	5,842	0.11	-0.77
DOMENY.PL sp. z o.o	5,694	0.11	6,038	0.11	-5.02
Trust Provider B.V.	5,657	0.10	5,109	0.09	11.52
Corporation Service Company	5,349	0.10	5,662	0.10	-4.85
dhosting.pl Sp. z o.o.	5,146	0.10	5,126	0.09	1.11
Unspecified	4,895	0.09	4,907	0.09	0.47
home.pl S.A.	4,729	0.09	4,838	0.09	-1.55
Mirohost	4,678	0.09	4,645	0.09	1.43
CloudFlare, Inc.	4,245	0.08	4,712	0.09	-9.27
Beijing Knownsec Information Technology Co., Ltd	4,138	0.08	3,779	0.07	10.28
Buypass AS-983163327	3,113	0.06	3,127	0.06	0.26
CentOS Web Panel	3,082	0.06	3,329	0.06	-6.76
SSL Server	3,045	0.06	3,033	0.06	1.11
Guardian Inc.	3,036	0.06	3,034	0.06	0.78
WoTrus CA Limited	2,970	0.05	5,362	0.10	-44.21
SSL Corporation	2,752	0.05	2,754	0.05	0.64
Digital Element	2,689	0.05	2,689	0.05	0.72
Google Trust Services	2,592	0.05	3,490	0.06	-25.20
DivMulTech LLC	2,545	0.05	2,461	0.05	4.15
Webgarden	2,534	0.05	2,462	0.05	3.66
GeoTrust, Inc.	2,229	0.04	2,244	0.04	0.04
AfterMarket.pl	2,206	0.04	1,428	0.03	55.59
nazwa.pl sp. z o.o.	2,204	0.04	2,254	0.04	-1.52
My Company Ltd	2,180	0.04	2,170	0.04	1.18
SmugMug	2,137	0.04	2,140	0.04	0.57
TAIWAN-CA	2,095	0.04	2,199	0.04	-4.05
Bitrix	2,069	0.04	2,158	0.04	-3.44
testexample	1,842	0.03	9,474	0.17	-80.42
The Trustico Group Ltd	1,786	0.03	1,845	0.03	-2.50
cndns	1,651	0.03	1,643	0.03	1.21
thawte, Inc.	1,647	0.03	1,682	0.03	-1.38
MyCompany	1,618	0.03	1,604	0.03	1.59
SecureCore	1,612	0.03	1,594	0.03	1.85
Alpiro s.r.o.	1,611	0.03	2,304	0.04	-29.58
StartCom Ltd.	1,575	0.03	1,623	0.03	-2.26
Trustwave Holdings, Inc.	1,536	0.03	1,565	0.03	-1.15
SwissSign AG	1,519	0.03	1,541	0.03	-0.72
OVH	1,477	0.03	1,489	0.03	-0.10
ZONER Software, a.s.	1,426	0.03	1,422	0.03	1.00
Skok.CZ	1,415	0.03	1,421	0.03	0.29
N/A	1,348	0.02	1,363	0.03	-0.39
Comodo Japan, Inc.	1,330	0.02	1,291	0.02	3.76
Dattatec.com	1,324	0.02	1,310	0.02	1.79
NetLock Kft.	1,318	0.02	1,336	0.02	-0.64
Bitnami	1,192	0.02	1,219	0.02	-1.51
Acme Co	1,128	0.02	1,116	0.02	1.80
CA	1,116	0.02	1,102	0.02	2.00
Beijing Xinchacha Credit Management Co., Ltd.	1,114	0.02	946	0.02	18.60
QuoVadis Trustlink B.V.	1,046	0.02	1,149	0.02	-8.31
EUNETIC GmbH	1,008	0.02	1,029	0.02	-1.34
Symantec Corporation	979	0.02	1,004	0.02	-1.79
Yandex LLC	912	0.02	894	0.02	2.74
SWsoft, Inc.	846	0.02	888	0.02	-4.05
Comodo Limited	824	0.02	828	0.02	0.23
KAGOYA Japan Ltd	762	0.01	772	0.01	-0.59
SVT	750	0.01	0	0.00	N/A

Note: Readers are cautioned that the Growth percentages are based on a CA's market share penetration rather than the absolute number of certificates we detected. Thus, it is possible for the number of certificates to increase, while the growth is actually a negative value.