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	February 2021 Count	February 2021 %	January 2021 Count	January 2021 %	Growth %
Let's Encrypt	2,970,259	24.55	2,882,062	24.22	1.35
Sectigo Limited	2,332,841	19.28	2,285,142	19.21	0.40
DigiCert	1,576,277	13.03	1,561,802	13.13	-0.74
cPanel, Inc.	728,793	6.02	705,375	5.93	1.61
GlobalSign nv-sa	573,071	4.74	586,013	4.93	-3.83
Unknown	451,130	3.73	445,088	3.74	-0.32
GoDaddy.com, Inc.	408,692	3.38	409,195	3.44	-1.78
Amazon	241,245	1.99	239,092	2.01	-0.77
Unizeto Technologies S.A.	238,345	1.97	88,162	0.74	165.88
Starfield Technologies, Inc.	219,347	1.81	218,644	1.84	-1.34
COMODO CA Limited	207,576	1.72	366,152	3.08	-44.25
Cloudflare, Inc.	199,238	1.65	191,631	1.61	2.25
SecureCore	122,944	1.02	119,853	1.01	0.88
Plesk	105,787	0.87	104,490	0.88	-0.43
Gehirn Inc.	94,739	0.78	92,692	0.78	0.52
SomeOrganization	91,951	0.76	91,118	0.77	-0.76
none	89,500	0.74	87,359	0.73	0.76
Google Trust Services	89,105	0.74	87,886	0.74	-0.29
ispgateway	69,197	0.57	68,798	0.58	-1.08
DreamHost	68,485	0.57	65,714	0.55	2.49
Microsoft Corporation	60,562	0.50	59,579	0.50	-0.03
Internet2	53,806	0.44	54,147	0.46	-2.27
home.pl S.A.	43,581	0.36	42,799	0.36	0.14
Actalis S.p.A.	41,709	0.34	40,853	0.34	0.41
GoGetSSL	40,679	0.34	39,099	0.33	2.32
Odin	37,335	0.31	37,487	0.32	-2.05
Entrust, Inc.	37,225	0.31	36,881	0.31	-0.74
Gandi	36,649	0.30	36,416	0.31	-1.03
Parallels	36,602	0.30	36,712	0.31	-1.95
TERENA	32,524	0.27	34,713	0.29	-7.86
TrustAsia Technologies, Inc.	31,178	0.26	28,468	0.24	7.71
Webhosting	31,009	0.26	30,419	0.26	0.25
Trustwave Holdings, Inc.	30,716	0.25	30,673	0.26	-1.52
GEANT Vereniging	28,945	0.24	25,824	0.22	10.23
GeoTrust Inc.	24,635	0.20	24,431	0.21	-0.83
Japan Registry Services Co., Ltd.	23,360	0.19	23,041	0.19	-0.29
Cybertrust Japan Co., Ltd.	19,497	0.16	19,425	0.16	-1.29
Internet Widgits Pty Ltd	17,711	0.15	17,602	0.15	-1.05
Acme Co	17,170	0.14	16,521	0.14	2.21
SECOM Trust Systems CO.,LTD.	16,558	0.14	15,943	0.13	2.14
Apache HTTP Server	16,411	0.14	16,385	0.14	-1.50
Network Solutions L.L.C.	15,342	0.13	15,080	0.13	0.05
WebSupport, s.r.o.	15,175	0.13	14,967	0.13	-0.29
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	15,166	0.13	15,013	0.13	-0.65
QuoVadis Limited	15,009	0.12	15,716	0.13	-6.08
Soluciones Corporativas IP, SL	14,268	0.12	13,978	0.12	0.39
SH	12,919	0.11	12,647	0.11	0.46
Default Company Ltd	12,828	0.11	12,761	0.11	-1.14
Trust Provider B.V.	12,750	0.11	12,610	0.11	-0.56
World4You Internet Services GmbH	12,126	0.10	11,830	0.10	0.81
WEDOS Internet, a.s.	11,791	0.10	11,671	0.10	-0.64
DOMENY.PL sp. z o.o	9,612	0.08	9,570	0.08	-1.22
Corporation Service Company	9,567	0.08	9,421	0.08	-0.13
Test Self SSL Company	9,188	0.08	8,965	0.08	0.79
KAGOYA-JAPAN	8,629	0.07	8,474	0.07	0.14
ZeroSSL	7,883	0.07	7,783	0.07	-0.39
Unspecified	7,501	0.06	6,829	0.06	8.02
www.sprinthost.ru	7,455	0.06	7,209	0.06	1.70
ddos-guard	6,982	0.06	6,789	0.06	1.14
The Trustico Group Ltd	6,499	0.05	6,422	0.05	-0.48
Basekit Ltd	5,838	0.05	5,228	0.04	9.82
XX	5,834	0.05	5,667	0.05	1.24
CloudFlare, Inc.	5,753	0.05	5,553	0.05	1.89
o2switch	5,583	0.05	5,273	0.04	4.13
Caddy Self-Signed	5,573	0.05	5,720	0.05	-4.18
Dreamcommerce S.A.	5,341	0.04	5,209	0.04	0.84
TAIWAN-CA	4,877	0.04	4,824	0.04	-0.57
T-Systems International GmbH	4,608	0.04	4,578	0.04	-1.01
dhosting.pl Sp. z o.o.	4,503	0.04	4,317	0.04	2.58
SSL Corporation	4,443	0.04	4,339	0.04	0.70
Mirohost	4,377	0.04	4,322	0.04	-0.40
nazwa.pl sp. z o.o.	3,986	0.03	3,869	0.03	1.32
SwissSign AG	3,976	0.03	4,020	0.03	-2.73
Buypass AS-983163327	3,923	0.03	3,880	0.03	-0.56
GMO CLOUD K.K.	3,911	0.03	3,815	0.03	0.82
thawte, Inc.	3,623	0.03	3,685	0.03	-3.31
GeoTrust, Inc.	3,582	0.03	3,580	0.03	-1.60
CentOS Web Panel	3,581	0.03	3,325	0.03	5.92
DealerInspire	3,580	0.03	3,466	0.03	1.58
HydrantID (Avalanche Cloud Corporation)	3,553	0.03	3,518	0.03	-0.68
QuoVadis Trustlink B.V.	3,543	0.03	3,361	0.03	3.67
National Institute of Informatics	3,497	0.03	3,870	0.03	-11.13
testexample	3,171	0.03	2,957	0.02	5.46
N/A	3,012	0.02	3,001	0.03	-1.29
WoTrus CA Limited	2,978	0.02	2,946	0.02	-0.59
Bitrix	2,974	0.02	2,822	0.02	3.64
SSL Server	2,883	0.02	2,860	0.02	-0.86
Guardian Inc.	2,858	0.02	2,801	0.02	0.35
ONEsolution s.r.o.	2,776	0.02	2,707	0.02	0.85
Beijing Knownsec Information Technology Co., Ltd	2,731	0.02	2,577	0.02	4.22
Digital Element	2,688	0.02	2,687	0.02	-1.62
FASTVPS	2,505	0.02	2,416	0.02	1.97
unaone	2,443	0.02	2,457	0.02	-2.22
Fasthosts Internet Limited	2,428	0.02	2,375	0.02	0.54
NetLock Kft.	2,419	0.02	3,446	0.03	-30.96
MyCompany	2,378	0.02	2,365	0.02	-1.11
Comodo Limited	2,316	0.02	2,348	0.02	-3.00
DivMulTech LLC	2,306	0.02	2,291	0.02	-1.01
AttHost Sp z o.o.	2,246	0.02	0	0.00	N/A
EUNETIC GmbH	2,228	0.02	2,227	0.02	-1.61

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.