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	April 2018 Count	April 2018 %	March 2018 Count	March 2018 %	Growth %
GoDaddy.com, Inc.	715,836	22.82	794,249	19.09	19.56
DigiCert	539,471	17.20	659,884	15.86	8.45
COMODO CA Limited	510,279	16.27	711,471	17.10	-4.86
GlobalSign nv-sa	260,508	8.30	320,623	7.70	7.78
Let's Encrypt	196,814	6.27	301,299	7.24	-13.35
GeoTrust Inc.	176,162	5.62	284,041	6.83	-17.73
Gandi	64,575	2.06	100,785	2.42	-15.01
cPanel, Inc.	51,376	1.64	82,660	1.99	-17.55
Amazon	49,930	1.59	66,552	1.60	-0.48
Unknown	40,811	1.30	76,679	1.84	-29.40
Google Trust Services	40,743	1.30	42,095	1.01	28.39
Starfield Technologies, Inc.	39,386	1.26	57,896	1.39	-9.76
Microsoft Corporation	37,210	1.19	43,624	1.05	13.15
Symantec Corporation	32,535	1.04	63,352	1.52	-31.87
thawte, Inc.	28,856	0.92	52,783	1.27	-27.48
Internet2	25,866	0.82	30,012	0.72	14.33
TERENA	23,595	0.75	27,972	0.67	11.90
Entrust, Inc.	19,394	0.62	23,833	0.57	7.95
Unizeto Technologies S.A.	15,406	0.49	19,215	0.46	6.36
Trustwave Holdings, Inc.	13,654	0.44	18,158	0.44	-0.25
Network Solutions L.L.C.	12,645	0.40	16,121	0.39	4.05
Apache HTTP Server	12,577	0.40	14,324	0.34	16.48
SomeOrganization	10,565	0.34	17,721	0.43	-20.91
Parallels	9,748	0.31	20,106	0.48	-35.68
SecureCore	9,206	0.29	14,154	0.34	-13.72
QuoVadis Limited	8,799	0.28	10,327	0.25	13.03
none	8,583	0.27	17,870	0.43	-36.29
NN.RU	8,481	0.27	8,883	0.21	26.65
ispgateway	8,002	0.26	17,623	0.42	-39.77
home.pl S.A.	7,359	0.23	10,643	0.26	-8.28
SSL.com	7,354	0.23	7,930	0.19	23.02
Internet Widgits Pty Ltd	6,002	0.19	6,683	0.16	19.14
Plesk	5,841	0.19	10,482	0.25	-26.08
Odin	5,482	0.17	11,024	0.26	-34.03
StartCom Ltd.	5,302	0.17	6,878	0.17	2.26
Cybertrust Japan Co., Ltd.	5,218	0.17	8,816	0.21	-21.48
io.ua	4,649	0.15	4,817	0.12	28.03
HydrantID (Avalanche Cloud Corporation)	4,057	0.13	4,507	0.11	19.41
CloudFlare, Inc.	3,678	0.12	3,758	0.09	29.83
GeoTrust, Inc.	3,269	0.10	5,608	0.13	-22.67
Pizza-Taxi.de GmbH / CA	3,226	0.10	3,232	0.08	32.41
Hostpoint AG	3,117	0.10	6,738	0.16	-38.63
nazwa.pl sp. z o.o.	2,850	0.09	4,326	0.10	-12.61
Corporation Service Company	2,680	0.09	3,665	0.09	-3.00
TrustAsia Technologies, Inc.	2,395	0.08	2,865	0.07	10.89
Trust Provider B.V.	2,371	0.08	3,682	0.09	-14.58
The Trustico Group Ltd	2,045	0.07	2,502	0.06	8.43
Hosting Ukraine LLC	1,964	0.06	2,352	0.06	10.77
WebSupport, s.r.o.	1,961	0.06	2,804	0.07	-7.23
Google Inc	1,887	0.06	2,058	0.05	21.63
National Institute of Informatics	1,794	0.06	2,305	0.06	3.25
Comodo Limited	1,726	0.06	3,149	0.08	-27.29
SECOM Trust Systems CO.,LTD.	1,530	0.05	3,257	0.08	-37.68
Government of Korea	1,480	0.05	1,988	0.05	-1.24
Nijimo, Inc.	1,356	0.04	2,086	0.05	-13.77
Default Company Ltd	1,305	0.04	2,202	0.05	-21.38
Actalis S.p.A./03358520967	1,264	0.04	3,246	0.08	-48.34
TAIWAN-CA	1,260	0.04	1,680	0.04	-0.51
DOMENY.PL sp. z o.o	1,257	0.04	1,730	0.04	-3.61
WoSign CA Limited	1,227	0.04	1,770	0.04	-8.04
Rede Nacional de Ensino e Pesquisa - RNP	1,222	0.04	1,496	0.04	8.36
UIC	1,108	0.04	1,177	0.03	24.88
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	1,101	0.04	1,590	0.04	-8.14
Japan Registry Services Co., Ltd.	1,073	0.03	1,842	0.04	-22.73
Globe Hosting, Inc.	1,071	0.03	1,358	0.03	4.62
KEYNECTIS	1,021	0.03	1,266	0.03	6.98
T-Systems International GmbH	1,019	0.03	1,638	0.04	-17.48
Test Self SSL Company	1,006	0.03	1,231	0.03	8.41
KDDI Web Communications Inc.	994	0.03	3,140	0.08	-58.01
SwissSign AG	925	0.03	1,387	0.03	-11.53
Webhosting	902	0.03	2,096	0.05	-42.91
AC Camerfirma S.A.	901	0.03	1,134	0.03	5.40
NetLock Kft.	887	0.03	1,221	0.03	-3.63
EUNETIC GmbH	854	0.03	1,215	0.03	-6.76
U.S. Government	792	0.03	952	0.02	10.36
Dreamcommerce S.A.	781	0.02	1,126	0.03	-7.99
SH	752	0.02	1,029	0.02	-3.05
Thawte, Inc.	747	0.02	1,392	0.03	-28.81
Verisign	704	0.02	1,340	0.03	-30.31
XX	691	0.02	893	0.02	2.65
AffirmTrust	671	0.02	881	0.02	1.03
Buypass AS-983163327	588	0.02	786	0.02	-0.76
Mirohost	586	0.02	705	0.02	10.26
WEDOS Internet, a.s.	575	0.02	1,167	0.03	-34.64
Equifax (Geotrust)	557	0.02	966	0.02	-23.51
www.sprinthost.ru	521	0.02	651	0.02	6.16
Zimbra Collaboration Server	477	0.02	530	0.01	19.39
Comvive Servidores SL	455	0.01	456	0.01	32.36
AlphaSSL	442	0.01	821	0.02	-28.58
CAcert Inc.	431	0.01	614	0.01	-6.88
Intexmedia	417	0.01	0	0.00	N/A
TBS INTERNET	388	0.01	637	0.02	-19.20
FNMT-RCM	388	0.01	461	0.01	11.65
IZENPE S.A.	372	0.01	0	0.00	N/A
Beijing Knownsec Information Technology Co., Ltd	365	0.01	551	0.01	-12.13
SVT	336	0.01	0	0.00	N/A
Root CA	329	0.01	449	0.01	-2.80
Yandex LLC	325	0.01	0	0.00	N/A
KAGOYA-JAPAN	324	0.01	676	0.02	-36.42
Universitaet Stuttgart	306	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.