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	May 2020 Count	May 2020 %	April 2020 Count	April 2020 %	Growth %
Let's Encrypt	2,240,431	22.19	2,218,880	22.36	-0.75
DigiCert	1,429,511	14.16	1,397,592	14.08	0.54
COMODO CA Limited	1,295,126	12.83	1,324,228	13.34	-3.86
Sectigo Limited	1,026,303	10.17	959,539	9.67	5.14
GlobalSign nv-sa	554,678	5.49	547,687	5.52	-0.45
cPanel, Inc.	552,792	5.48	531,745	5.36	2.19
GoDaddy.com, Inc.	390,273	3.87	387,806	3.91	-1.08
Unknown	352,153	3.49	345,063	3.48	0.32
Amazon	201,655	2.00	192,785	1.94	2.82
Starfield Technologies, Inc.	196,475	1.95	189,790	1.91	1.76
CloudFlare, Inc.	141,110	1.40	136,148	1.37	1.88
SecureCore	93,761	0.93	91,416	0.92	0.82
Plesk	92,789	0.92	92,030	0.93	-0.89
Google Trust Services	79,889	0.79	77,443	0.78	1.40
none	73,676	0.73	72,202	0.73	0.31
SomeOrganization	72,634	0.72	72,995	0.74	-2.19
Gehirn Inc.	71,777	0.71	69,165	0.70	2.01
Unizeto Technologies S.A.	69,085	0.68	66,650	0.67	1.89
ispgateway	63,154	0.63	62,515	0.63	-0.70
Microsoft Corporation	58,951	0.58	58,179	0.59	-0.40
TERENA	52,629	0.52	53,366	0.54	-3.06
Internet2	52,463	0.52	51,810	0.52	-0.46
DreamHost	45,365	0.45	43,515	0.44	2.48
Parallels	38,487	0.38	38,684	0.39	-2.20
GeoTrust Inc.	37,904	0.38	37,475	0.38	-0.58
Odin	37,666	0.37	37,212	0.37	-0.50
Entrust, Inc.	36,618	0.36	37,004	0.37	-2.73
home.pl S.A.	36,133	0.36	35,317	0.36	0.57
Trustwave Holdings, Inc.	34,321	0.34	34,721	0.35	-2.83
Gandi	34,220	0.34	33,850	0.34	-0.63
Actalis S.p.A./03358520967	33,441	0.33	32,463	0.33	1.26
Webhosting	24,949	0.25	24,105	0.24	1.74
GoGetSSL	19,735	0.20	17,883	0.18	8.48
TrustAsia Technologies, Inc.	18,737	0.19	16,905	0.17	8.95
QuoVadis Limited	17,812	0.18	17,598	0.18	-0.51
Cybertrust Japan Co., Ltd.	16,856	0.17	19,775	0.20	-16.21
SECOM Trust Systems CO.,LTD.	16,769	0.17	17,057	0.17	-3.36
Japan Registry Services Co., Ltd.	16,663	0.17	15,815	0.16	3.57
Apache HTTP Server	16,529	0.16	16,500	0.17	-1.53
Network Solutions L.L.C.	15,436	0.15	15,830	0.16	-4.15
Internet Widgits Pty Ltd	15,298	0.15	15,024	0.15	0.09
WebSupport, s.r.o.	14,153	0.14	13,685	0.14	1.66
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	14,148	0.14	14,074	0.14	-1.18
Acme Co	11,180	0.11	10,235	0.10	7.38
Trust Provider B.V.	10,874	0.11	10,722	0.11	-0.31
SH	10,005	0.10	9,421	0.09	4.39
Default Company Ltd	9,806	0.10	8,893	0.09	8.39
WEDOS Internet, a.s.	9,656	0.10	9,332	0.09	1.71
World4You Internet Services GmbH	9,411	0.09	9,079	0.09	1.89
Corporation Service Company	8,860	0.09	10,106	0.10	-13.82
DOMENY.PL sp. z o.o	7,135	0.07	6,595	0.07	6.35
KAGOYA-JAPAN	6,757	0.07	6,536	0.07	1.62
Test Self SSL Company	6,657	0.07	6,364	0.06	2.82
Caddy Self-Signed	6,137	0.06	8,500	0.09	-29.03
The Trustico Group Ltd	6,104	0.06	5,911	0.06	1.51
www.sprinthost.ru	5,486	0.05	5,232	0.05	3.07
FASTVPS	5,365	0.05	5,271	0.05	0.05
StartCom Ltd.	5,092	0.05	5,133	0.05	-2.49
thawte, Inc.	4,491	0.04	4,487	0.05	-1.61
Dreamcommerce S.A.	4,357	0.04	4,259	0.04	0.56
XX	4,198	0.04	4,079	0.04	1.17
Comodo Limited	4,029	0.04	4,391	0.04	-9.80
GeoTrust, Inc.	4,025	0.04	4,050	0.04	-2.31
TAIWAN-CA	3,973	0.04	3,895	0.04	0.27
Rede Nacional de Ensino e Pesquisa - RNP	3,903	0.04	3,765	0.04	1.90
National Institute of Informatics	3,833	0.04	3,789	0.04	-0.56
Mirohost	3,688	0.04	3,598	0.04	0.76
T-Systems International GmbH	3,660	0.04	3,578	0.04	0.55
SwissSign AG	3,644	0.04	3,726	0.04	-3.86
Buypass AS-983163327	3,202	0.03	3,130	0.03	0.56
dhosting.pl Sp. z o.o.	3,160	0.03	2,982	0.03	4.17
SSL Corporation	3,136	0.03	3,016	0.03	2.21
o2switch	3,013	0.03	2,797	0.03	5.89
Verisign	2,900	0.03	2,873	0.03	-0.78
Unspecified	2,899	0.03	2,629	0.03	8.39
HydrantID (Avalanche Cloud Corporation)	2,849	0.03	3,451	0.03	-18.85
GMO CLOUD K.K.	2,838	0.03	2,672	0.03	4.41
N/A	2,826	0.03	2,786	0.03	-0.29
NetLock Kft.	2,807	0.03	2,751	0.03	0.30
Guardian Inc.	2,789	0.03	2,762	0.03	-0.74
DealerInspire	2,746	0.03	2,685	0.03	0.53
nazwa.pl sp. z o.o.	2,657	0.03	2,661	0.03	-1.85
unaone	2,449	0.02	0	0.00	N/A
Basekit Ltd	2,426	0.02	2,296	0.02	3.86
MyCompany	2,287	0.02	2,252	0.02	-0.17
Soluciones Corporativas IP, SL	2,277	0.02	2,172	0.02	3.05
SSL Server	2,207	0.02	2,100	0.02	3.31
Symantec Corporation	2,186	0.02	2,273	0.02	-5.46
ONEsolution s.r.o.	2,136	0.02	2,078	0.02	1.04
EUNETIC GmbH	2,074	0.02	2,175	0.02	-6.27
Bitrix	2,049	0.02	1,758	0.02	14.57
WoTrus CA Limited	1,992	0.02	1,876	0.02	4.38
WoSign CA Limited	1,952	0.02	2,000	0.02	-4.06
Fasthosts Internet Limited	1,944	0.02	1,892	0.02	1.00
GEANT Vereniging	1,937	0.02	0	0.00	N/A
OVH	1,905	0.02	1,904	0.02	-1.65
Globe Hosting, Inc.	1,856	0.02	1,946	0.02	-6.25
AC Camerfirma S.A.	1,855	0.02	1,849	0.02	-1.38
Comvive Servidores SL	1,826	0.02	1,811	0.02	-0.89
Greenhost	1,818	0.02	1,765	0.02	1.25

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.