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 2016 Count	April 2016 %	March 2016 Count	March 2016 %	Growth %
GoDaddy.com, Inc.	557,643	21.32	548,877	21.29	0.12
COMODO CA Limited	425,543	16.27	404,538	15.69	3.66
GeoTrust Inc.	365,891	13.99	372,491	14.45	-3.20
DigiCert	288,952	11.05	278,987	10.82	2.07
GlobalSign nv-sa	173,158	6.62	171,863	6.67	-0.71
Symantec Corporation	97,896	3.74	82,312	3.19	17.20
Gandi	81,755	3.13	81,424	3.16	-1.05
thawte, Inc.	66,857	2.56	66,103	2.56	-0.33
GeoTrust, Inc.	34,997	1.34	40,695	1.58	-15.25
Starfield Technologies, Inc.	34,069	1.30	40,785	1.58	-17.68
Unknown	31,707	1.21	31,706	1.23	-1.45
Unizeto Technologies S.A.	31,169	1.19	30,961	1.20	-0.79
StartCom Ltd.	31,157	1.19	31,042	1.20	-1.09
Microsoft Corporation	30,176	1.15	29,889	1.16	-0.51
Internet2	26,524	1.01	26,513	1.03	-1.41
Verizon Enterprise Solutions	25,070	0.96	24,854	0.96	-0.60
Entrust, Inc.	24,514	0.94	24,445	0.95	-1.18
Network Solutions L.L.C.	23,316	0.89	23,362	0.91	-1.65
TERENA	22,810	0.87	22,823	0.89	-1.51
Parallels	16,845	0.64	16,891	0.66	-1.72
Let's Encrypt	15,010	0.57	10,740	0.42	37.73
Verisign	14,475	0.55	15,708	0.61	-9.19
Trustwave Holdings, Inc.	12,680	0.48	12,629	0.49	-1.06
Thawte, Inc.	11,782	0.45	12,565	0.49	-7.60
SomeOrganization	11,025	0.42	10,923	0.42	-0.53
Google Inc	10,041	0.38	9,866	0.38	0.29
QuoVadis Limited	6,889	0.26	6,674	0.26	1.72
AlphaSSL	5,786	0.22	6,005	0.23	-5.05
Cybertrust Japan Co., Ltd.	5,411	0.21	5,372	0.21	-0.74
none	4,938	0.19	4,680	0.18	3.98
WoSign CA Limited	4,681	0.18	4,560	0.18	1.16
Comodo Limited	4,022	0.15	4,057	0.16	-2.30
SECOM Trust Systems CO.,LTD.	3,652	0.14	3,673	0.14	-2.02
Corporation Service Company	3,627	0.14	3,582	0.14	-0.22
ispgateway	2,982	0.11	2,975	0.12	-1.22
DreamHost	2,689	0.10	2,557	0.10	3.63
Volusion, Inc.	2,636	0.10	2,922	0.11	-11.10
SecureCore	2,433	0.09	2,355	0.09	1.81
Equifax (Geotrust)	2,313	0.09	2,375	0.09	-4.03
GANDI SAS	2,130	0.08	2,258	0.09	-7.04
KDDI Web Communications Inc.	1,981	0.08	1,851	0.07	5.47
Government of Korea	1,885	0.07	1,877	0.07	-1.03
National Institute of Informatics	1,792	0.07	1,776	0.07	-0.57
Intermediate Certificate	1,764	0.07	1,808	0.07	-3.85
T-Systems International GmbH	1,724	0.07	1,722	0.07	-1.34
nazwa.pl sp. z o.o.	1,612	0.06	1,567	0.06	1.38
Odin	1,507	0.06	1,324	0.05	12.17
Amazon	1,493	0.06	3,937	0.15	-62.63
U.S. Government	1,272	0.05	1,271	0.05	-1.38
SSL.com	1,213	0.05	1,197	0.05	-0.14
EUNETIC GmbH	1,128	0.04	1,116	0.04	-0.39
Comodo CA Limited	1,057	0.04	1,083	0.04	-3.82
Root CA	1,039	0.04	1,065	0.04	-3.86
CAcert Inc.	1,010	0.04	1,084	0.04	-8.18
Internet Widgits Pty Ltd	963	0.04	981	0.04	-3.26
DOMENY.PL sp. z o.o	933	0.04	1,133	0.04	-18.85
TAIWAN-CA	923	0.04	900	0.03	1.06
SwissSign AG	880	0.03	875	0.03	-0.89
Trend Micro Inc	873	0.03	863	0.03	-0.31
NetLock Kft.	842	0.03	850	0.03	-2.38
Thawte	814	0.03	831	0.03	-3.47
KEYNECTIS	765	0.03	760	0.03	-0.81
Globe Hosting, Inc.	747	0.03	777	0.03	-5.26
Rede Nacional de Ensino e Pesquisa - RNP	701	0.03	667	0.03	3.57
KPN Corporate Market BV	657	0.03	663	0.03	-2.35
ICP-Brasil	632	0.02	632	0.02	-1.45
Zimbra Collaboration Server	628	0.02	635	0.02	-2.54
Hostpoint GmbH	619	0.02	528	0.02	15.53
FNMT-RCM	605	0.02	591	0.02	0.88
Parallels, Inc.	594	0.02	602	0.02	-2.76
TBS INTERNET	547	0.02	557	0.02	-3.22
nazwa.pl S.A.	542	0.02	573	0.02	-6.79
ACCV	483	0.02	485	0.02	-1.86
TAIWAN-CA INC.	450	0.02	461	0.02	-3.81
SWsoft, Inc.	445	0.02	458	0.02	-4.25
WebSupport, s.r.o.	442	0.02	426	0.02	2.25
Servision Inc.	424	0.02	550	0.02	-24.03
Firstserver, Inc	418	0.02	420	0.02	-1.92
Dreamcommerce S.A.	416	0.02	403	0.02	1.72
Snake Oil, Ltd	403	0.02	434	0.02	-8.49
XX	365	0.01	372	0.01	-3.31
CrossTrust	358	0.01	365	0.01	-3.34
Register.com	341	0.01	361	0.01	-6.91
HTTPS Management Certificate for SonicWALL (self-signed)	314	0.01	321	0.01	-3.60
Buypass AS-983163327	310	0.01	303	0.01	0.82
Universitaet Stuttgart	309	0.01	307	0.01	-0.81
Trust Provider B.V.	301	0.01	0	0.00	N/A
Yandex LLC	297	0.01	288	0.01	1.63
Default Company Ltd	276	0.01	256	0.01	6.24
KAGOYA JAPAN Inc.	271	0.01	297	0.01	-10.08
Apache HTTP Server	269	0.01	259	0.01	2.35
OCC	265	0.01	271	0.01	-3.64
DOMENY.PL Ltd.	265	0.01	279	0.01	-6.40
Agencia Catalana de Certificacio (NIF Q-0801176-I)	263	0.01	274	0.01	-5.41
Site Blindado S.A.	262	0.01	256	0.01	0.86
Pavel&Pavel	258	0.01	258	0.01	-1.45
MyCompany	249	0.01	254	0.01	-3.39
Dell Inc.	248	0.01	528	0.02	-53.71
Oracle Corporation	247	0.01	0	0.00	N/A
Actalis S.p.A./03358520967	245	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.