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 2018 Count	May 2018 %	April 2018 Count	April 2018 %	Growth %
GoDaddy.com, Inc.	686,056	23.95	715,836	22.82	4.96
DigiCert	479,027	16.72	539,471	17.20	-2.75
COMODO CA Limited	459,759	16.05	510,279	16.27	-1.32
Let's Encrypt	220,844	7.71	196,814	6.27	22.89
GlobalSign nv-sa	161,514	5.64	260,508	8.30	-32.10
GeoTrust Inc.	130,733	4.56	176,162	5.62	-18.72
Gandi	64,998	2.27	64,575	2.06	10.24
cPanel, Inc.	55,882	1.95	51,376	1.64	19.13
Unknown	49,245	1.72	40,811	1.30	32.15
Amazon	46,593	1.63	49,930	1.59	2.20
Starfield Technologies, Inc.	39,340	1.37	39,386	1.26	9.39
Google Trust Services	37,682	1.32	40,743	1.30	1.29
Microsoft Corporation	35,524	1.24	37,210	1.19	4.56
Symantec Corporation	29,830	1.04	32,535	1.04	0.42
thawte, Inc.	28,268	0.99	28,856	0.92	7.29
Internet2	19,631	0.69	25,866	0.82	-16.88
TERENA	19,174	0.67	23,595	0.75	-11.00
Entrust, Inc.	15,729	0.55	19,394	0.62	-11.18
Apache HTTP Server	14,174	0.49	12,577	0.40	23.43
Parallels	13,147	0.46	9,748	0.31	47.71
SomeOrganization	11,973	0.42	10,565	0.34	24.12
Network Solutions L.L.C.	11,943	0.42	12,645	0.40	3.44
ispgateway	11,873	0.41	8,002	0.26	62.50
none	11,517	0.40	8,583	0.27	46.96
Unizeto Technologies S.A.	11,336	0.40	15,406	0.49	-19.41
SecureCore	10,454	0.36	9,206	0.29	24.37
Trustwave Holdings, Inc.	9,423	0.33	13,654	0.44	-24.42
Plesk	8,130	0.28	5,841	0.19	52.44
QuoVadis Limited	7,803	0.27	8,799	0.28	-2.88
Odin	7,509	0.26	5,482	0.17	50.02
home.pl S.A.	6,930	0.24	7,359	0.23	3.14
Cybertrust Japan Co., Ltd.	6,107	0.21	5,218	0.17	28.18
Internet Widgits Pty Ltd	6,087	0.21	6,002	0.19	11.07
StartCom Ltd.	5,109	0.18	5,302	0.17	5.53
io.ua	4,833	0.17	4,649	0.15	13.86
Hostpoint AG	4,763	0.17	3,117	0.10	67.36
SSL.com	3,840	0.13	7,354	0.23	-42.81
CloudFlare, Inc.	3,823	0.13	3,678	0.12	13.84
GeoTrust, Inc.	3,575	0.12	3,269	0.10	19.77
HydrantID (Avalanche Cloud Corporation)	2,861	0.10	4,057	0.13	-22.77
TrustAsia Technologies, Inc.	2,808	0.10	2,395	0.08	28.41
Corporation Service Company	2,758	0.10	2,680	0.09	12.71
nazwa.pl sp. z o.o.	2,712	0.09	2,850	0.09	4.22
Trust Provider B.V.	2,592	0.09	2,371	0.08	19.73
Actalis S.p.A./03358520967	2,365	0.08	1,264	0.04	104.92
WebSupport, s.r.o.	2,266	0.08	1,961	0.06	26.55
The Trustico Group Ltd	2,128	0.07	2,045	0.07	13.97
SECOM Trust Systems CO.,LTD.	2,102	0.07	1,530	0.05	50.47
KDDI Web Communications Inc.	2,037	0.07	994	0.03	124.44
Comodo Limited	1,960	0.07	1,726	0.06	24.37
Hosting Ukraine LLC	1,670	0.06	1,964	0.06	-6.87
Nijimo, Inc.	1,631	0.06	1,356	0.04	31.73
National Institute of Informatics	1,631	0.06	1,794	0.06	-0.43
Webhosting	1,514	0.05	902	0.03	83.83
Default Company Ltd	1,471	0.05	1,305	0.04	23.45
Japan Registry Services Co., Ltd.	1,333	0.05	1,073	0.03	36.06
Government of Korea	1,315	0.05	1,480	0.05	-2.69
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	1,229	0.04	1,101	0.04	22.25
T-Systems International GmbH	1,229	0.04	1,019	0.03	32.09
UIC	1,177	0.04	1,108	0.04	16.34
WoSign CA Limited	1,142	0.04	1,227	0.04	1.93
Dreamcommerce S.A.	1,138	0.04	781	0.02	59.58
Rede Nacional de Ensino e Pesquisa - RNP	1,128	0.04	1,222	0.04	1.10
TAIWAN-CA	1,115	0.04	1,260	0.04	-3.08
Globe Hosting, Inc.	1,074	0.04	1,071	0.03	9.83
DOMENY.PL sp. z o.o	1,050	0.04	1,257	0.04	-8.51
SwissSign AG	994	0.03	925	0.03	17.69
Thawte, Inc.	848	0.03	747	0.02	24.33
KEYNECTIS	846	0.03	1,021	0.03	-9.25
Verisign	834	0.03	704	0.02	29.74
Test Self SSL Company	790	0.03	1,006	0.03	-13.99
AC Camerfirma S.A.	786	0.03	901	0.03	-4.46
WEDOS Internet, a.s.	767	0.03	575	0.02	46.09
SH	761	0.03	752	0.02	10.83
NetLock Kft.	750	0.03	887	0.03	-7.40
EUNETIC GmbH	730	0.03	854	0.03	-6.38
Buypass AS-983163327	667	0.02	588	0.02	24.24
AffirmTrust	648	0.02	671	0.02	5.77
FIDUCIA & GAD IT AG	640	0.02	0	0.00	N/A
XX	597	0.02	691	0.02	-5.38
KAGOYA-JAPAN	574	0.02	324	0.01	94.03
Equifax (Geotrust)	517	0.02	557	0.02	1.66
Mirohost	499	0.02	586	0.02	-6.74
U.S. Government	494	0.02	792	0.03	-31.69
Comvive Servidores SL	480	0.02	455	0.01	15.54
PCextreme BV	458	0.02	0	0.00	N/A
CAcert Inc.	454	0.02	431	0.01	15.37
Intexmedia	429	0.01	417	0.01	12.67
Beijing Knownsec Information Technology Co., Ltd	426	0.01	365	0.01	27.82
www.sprinthost.ru	424	0.01	521	0.02	-10.87
AlphaSSL	396	0.01	442	0.01	-1.88
TBS INTERNET	383	0.01	388	0.01	8.11
CertCenter AG	372	0.01	0	0.00	N/A
ONEsolution s.r.o.	355	0.01	0	0.00	N/A
Zimbra Collaboration Server	343	0.01	477	0.02	-21.25
OVH	324	0.01	0	0.00	N/A
KPN B.V.	316	0.01	0	0.00	N/A
Root CA	301	0.01	329	0.01	0.20
MyCompany	301	0.01	0	0.00	N/A
IZENPE S.A.	291	0.01	372	0.01	-14.33

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.