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 doesn't verify the signatures of the certificates it finds, it only uses the issuer Organization Name to uniquely identify the issuing CA.

CA	October 2021 Count	October 2021 %	September 2021 Count	September 2021 %	Growth %
Let's Encrypt	1,544,604	28.45	1,523,633	28.20	0.89
Sectigo Limited	1,233,161	22.72	1,247,232	23.09	-1.61
DigiCert	577,921	10.65	578,851	10.72	-0.64
GlobalSign nv-sa	257,185	4.74	255,571	4.73	0.15
Unknown	195,445	3.60	200,105	3.70	-2.80
GoDaddy.com, Inc.	167,957	3.09	177,871	3.29	-6.03
Amazon	163,998	3.02	159,192	2.95	2.52
cPanel, Inc.	140,369	2.59	136,161	2.52	2.59
Google Trust Services LLC	96,484	1.78	92,069	1.70	4.29
Plesk	81,874	1.51	80,538	1.49	1.17
SomeOrganization	75,858	1.40	74,375	1.38	1.50
Starfield Technologies, Inc.	59,673	1.10	59,575	1.10	-0.32
COMODO CA Limited	54,865	1.01	58,082	1.08	-6.00
Cloudflare, Inc.	52,532	0.97	44,487	0.82	17.51
Actalis S.p.A.	47,674	0.88	43,038	0.80	10.24
Unizeto Technologies S.A.	46,335	0.85	45,735	0.85	0.82
Parallels	27,052	0.50	27,264	0.50	-1.26
TrustAsia Technologies, Inc.	24,868	0.46	22,164	0.41	11.66
GEANT Vereniging	23,980	0.44	22,733	0.42	4.98
GoGetSSL	23,217	0.43	28,957	0.54	-20.21
Internet2	22,050	0.41	22,715	0.42	-3.40
Odin	21,347	0.39	21,479	0.40	-1.09
Gandi	20,890	0.38	20,842	0.39	-0.25
Japan Registry Services Co., Ltd.	19,253	0.35	19,165	0.35	-0.03
ddos-guard	18,693	0.34	17,578	0.33	5.83
SH	17,224	0.32	15,975	0.30	7.30
Soluciones Corporativas IP, SL	16,396	0.30	16,144	0.30	1.07
Cybertrust Japan Co., Ltd.	15,945	0.29	15,812	0.29	0.35
Apache HTTP Server	15,927	0.29	15,935	0.29	-0.53
SECOM Trust Systems CO.,LTD.	13,941	0.26	13,917	0.26	-0.31
Entrust, Inc.	13,895	0.26	14,094	0.26	-1.89
Test Self SSL Company	12,386	0.23	12,084	0.22	2.00
Internet Widgits Pty Ltd	11,958	0.22	12,344	0.23	-3.60
TERENA	11,500	0.21	12,770	0.24	-10.38
Microsoft Corporation	10,287	0.19	10,279	0.19	-0.41
Default Company Ltd	10,171	0.19	10,169	0.19	-0.46
ZeroSSL	9,673	0.18	6,921	0.13	39.09
none	9,600	0.18	9,924	0.18	-3.73
CloudFlare, Inc.	8,684	0.16	4,245	0.08	103.58
GeoTrust Inc.	8,402	0.15	8,583	0.16	-2.58
FASTVPS	7,485	0.14	7,342	0.14	1.45
KAGOYA-JAPAN	6,778	0.12	6,755	0.13	-0.14
Corporation Service Company	6,662	0.12	5,349	0.10	23.94
XX	6,474	0.12	6,256	0.12	2.98
Beijing Knownsec Information Technology Co., Ltd	6,200	0.11	4,138	0.08	49.11
QuoVadis Limited	6,141	0.11	6,421	0.12	-4.82
Network Solutions L.L.C.	5,759	0.11	5,901	0.11	-2.88
DOMENY.PL sp. z o.o	5,735	0.11	5,694	0.11	0.23
Trust Provider B.V.	5,632	0.10	5,657	0.10	-0.92
WoTrus CA Limited	5,544	0.10	2,970	0.05	85.76
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	5,518	0.10	5,756	0.11	-4.60
dhosting.pl Sp. z o.o.	5,243	0.10	5,146	0.10	1.39
Unspecified	4,948	0.09	4,895	0.09	0.59
home.pl S.A.	4,829	0.09	4,729	0.09	1.62
Mirohost	4,689	0.09	4,678	0.09	-0.25
Buypass AS-983163327	3,123	0.06	3,113	0.06	-0.16
testexample	3,119	0.06	1,842	0.03	68.51
SSL Server	3,070	0.06	3,045	0.06	0.33
Guardian Inc.	3,045	0.06	3,036	0.06	-0.19
SSL Corporation	2,830	0.05	2,752	0.05	2.34
DivMulTech LLC	2,742	0.05	2,545	0.05	7.22
Digital Element	2,690	0.05	2,689	0.05	-0.45
CentOS Web Panel	2,672	0.05	3,082	0.06	-13.72
Webgarden	2,639	0.05	2,534	0.05	3.64
My Company Ltd	2,286	0.04	2,180	0.04	4.36
GeoTrust, Inc.	2,226	0.04	2,229	0.04	-0.62
nazwa.pl sp. z o.o.	2,221	0.04	2,204	0.04	0.28
SmugMug	2,159	0.04	2,137	0.04	0.54
TAIWAN-CA	2,052	0.04	2,095	0.04	-2.53
Bitrix	2,022	0.04	2,069	0.04	-2.74
The Trustico Group Ltd	1,753	0.03	1,786	0.03	-2.32
Alpiro s.r.o.	1,733	0.03	1,611	0.03	7.05
cndns	1,694	0.03	1,651	0.03	2.11
MyCompany	1,674	0.03	1,618	0.03	2.96
StartCom Ltd.	1,620	0.03	1,575	0.03	2.36
SecureCore	1,521	0.03	1,612	0.03	-6.10
thawte, Inc.	1,519	0.03	1,647	0.03	-8.22
OVH	1,483	0.03	1,477	0.03	-0.08
Trustwave Holdings, Inc.	1,478	0.03	1,536	0.03	-4.24
ZONER Software, a.s.	1,455	0.03	1,426	0.03	1.54
Skok.CZ	1,416	0.03	1,415	0.03	-0.41
N/A	1,382	0.03	1,348	0.02	2.03
Dattatec.com	1,369	0.03	1,324	0.02	2.90
Comodo Japan, Inc.	1,344	0.02	1,330	0.02	0.56
NetLock Kft.	1,226	0.02	1,318	0.02	-7.43
Beijing Xinchacha Credit Management Co., Ltd.	1,225	0.02	1,114	0.02	9.43
Bitnami	1,181	0.02	1,192	0.02	-1.40
CA	1,126	0.02	1,116	0.02	0.41
Acme Co	1,112	0.02	1,128	0.02	-1.89
Yandex LLC	1,005	0.02	912	0.02	9.66
EUNETIC GmbH	995	0.02	1,008	0.02	-1.77
QuoVadis Trustlink B.V.	966	0.02	1,046	0.02	-8.09
Symantec Corporation	959	0.02	979	0.02	-2.52
SwissSign AG	899	0.02	1,519	0.03	-41.10
SWsoft, Inc.	856	0.02	846	0.02	0.69
FNMT-RCM	853	0.02	0	0.00	N/A
Comodo Limited	812	0.01	824	0.02	-1.93
FASTPANEL	776	0.01	0	0.00	N/A
KAGOYA Japan Ltd	734	0.01	762	0.01	-4.14
T-Systems International GmbH	731	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.