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	May 2015 Count	May 2015 %	April 2015 Count	April 2015 %	Growth %
GoDaddy.com, Inc.	438,930	20.15	424,382	19.88	1.34
COMODO CA Limited	301,455	13.84	284,287	13.32	3.90
GeoTrust Inc.	250,164	11.48	224,620	10.52	9.13
DigiCert	209,260	9.61	200,305	9.38	2.36
GeoTrust, Inc.	164,831	7.57	190,580	8.93	-15.26
GlobalSign nv-sa	115,896	5.32	115,951	5.43	-2.06
Gandi	67,441	3.10	65,427	3.07	1.00
Verisign	57,036	2.62	68,169	3.19	-18.02
Thawte, Inc.	46,200	2.12	52,437	2.46	-13.67
Symantec Corporation	42,156	1.94	31,316	1.47	31.90
Unknown	39,401	1.81	38,946	1.82	-0.87
Starfield Technologies, Inc.	38,659	1.77	38,639	1.81	-1.97
thawte, Inc.	36,451	1.67	30,798	1.44	15.97
Network Solutions L.L.C.	29,986	1.38	30,121	1.41	-2.46
StartCom Ltd.	29,348	1.35	28,803	1.35	-0.16
Internet2	22,632	1.04	22,179	1.04	-0.02
Entrust, Inc.	22,382	1.03	22,134	1.04	-0.92
TERENA	21,275	0.98	20,852	0.98	-0.03
Verizon Enterprise Solutions	19,005	0.87	18,098	0.85	2.89
Microsoft Corporation	15,398	0.71	14,886	0.70	1.35
Parallels	14,919	0.68	14,570	0.68	0.33
AlphaSSL	12,710	0.58	14,156	0.66	-12.03
Trustwave Holdings, Inc.	11,239	0.52	11,114	0.52	-0.91
SomeOrganization	8,355	0.38	7,985	0.37	2.52
Volusion, Inc.	8,017	0.37	8,628	0.40	-8.96
Google Inc	7,301	0.34	7,060	0.33	1.33
Unizeto Technologies S.A.	7,096	0.33	6,849	0.32	1.52
Cybertrust Japan Co., Ltd.	4,921	0.23	4,902	0.23	-1.64
GANDI SAS	4,630	0.21	4,865	0.23	-6.75
Comodo Limited	4,428	0.20	4,392	0.21	-1.21
Equifax (Geotrust)	4,020	0.18	4,501	0.21	-12.49
SECOM Trust Systems CO.,LTD.	3,883	0.18	3,896	0.18	-2.34
Cybertrust Inc	3,664	0.17	3,779	0.18	-5.00
none	3,273	0.15	3,137	0.15	2.23
QuoVadis Limited	3,231	0.15	2,962	0.14	6.88
Servision Inc.	3,036	0.14	3,015	0.14	-1.33
Globe Hosting, Inc.	2,825	0.13	2,797	0.13	-1.04
ispgateway	2,574	0.12	2,520	0.12	0.08
Comodo CA Limited	2,349	0.11	2,610	0.12	-11.82
Corporation Service Company	2,324	0.11	2,175	0.10	4.70
Thawte	1,733	0.08	1,795	0.08	-5.40
Government of Korea	1,627	0.07	1,595	0.07	-0.05
nazwa.pl S.A.	1,576	0.07	1,522	0.07	1.46
DreamHost	1,535	0.07	1,433	0.07	4.96
Root CA	1,512	0.07	1,522	0.07	-2.66
National Institute of Informatics	1,496	0.07	1,464	0.07	0.12
T-Systems International GmbH	1,491	0.07	1,472	0.07	-0.75
CAcert Inc.	1,434	0.07	1,400	0.07	0.36
U.S. Government	1,390	0.06	1,398	0.07	-2.58
Autistici/Inventati	1,387	0.06	1,370	0.06	-0.80
Intermediate Certificate	1,260	0.06	1,222	0.06	1.03
GeoTrust Inc	1,203	0.06	1,456	0.07	-19.04
EUNETIC GmbH	1,136	0.05	1,127	0.05	-1.23
UIC	1,121	0.05	1,118	0.05	-1.75
Trusted Secure Certificate Authority	1,105	0.05	1,268	0.06	-14.61
TAIWAN-CA INC.	1,004	0.05	1,054	0.05	-6.67
AusCERT	816	0.04	947	0.04	-15.57
NetLock Kft.	797	0.04	800	0.04	-2.38
Internet Widgits Pty Ltd	793	0.04	786	0.04	-1.14
Register.com	743	0.03	862	0.04	-15.54
SSL.com	732	0.03	687	0.03	4.40
Parallels, Inc.	706	0.03	724	0.03	-4.45
Trend Micro Inc	677	0.03	660	0.03	0.51
SwissSign AG	673	0.03	659	0.03	0.06
JSC Regional Network Information Center	619	0.03	663	0.03	-8.52
KPN Corporate Market BV	615	0.03	598	0.03	0.77
DOMENY.PL Ltd.	601	0.03	655	0.03	-10.09
GlobalSign	597	0.03	625	0.03	-6.41
ICP-Brasil	593	0.03	573	0.03	1.40
KEYNECTIS	584	0.03	556	0.03	2.92
KAGOYA JAPAN Inc.	582	0.03	588	0.03	-3.02
SWsoft, Inc.	569	0.03	582	0.03	-4.21
WoSign CA Limited	556	0.03	414	0.02	31.59
Snake Oil, Ltd	536	0.02	552	0.03	-4.86
TBS INTERNET	524	0.02	509	0.02	0.87
Zimbra Collaboration Server	523	0.02	504	0.02	1.68
DOMENY.PL sp. z o.o	494	0.02	322	0.02	50.32
SecureTrust Corporation	479	0.02	546	0.03	-14.04
SGssl	477	0.02	483	0.02	-3.23
Firstserver, Inc	457	0.02	466	0.02	-3.91
HTTPS Management Certificate for SonicWALL (self-signed)	440	0.02	409	0.02	5.41
CrossTrust	427	0.02	431	0.02	-2.93
ACCV	415	0.02	405	0.02	0.40
FNMT-RCM	408	0.02	393	0.02	1.72
Ministere education nationale (MENESR)	385	0.02	384	0.02	-1.76
Alpha	367	0.02	389	0.02	-7.56
GAD EG	360	0.02	350	0.02	0.78
XX	345	0.02	350	0.02	-3.42
Agencia Catalana de Certificacio (NIF Q-0801176-I)	343	0.02	344	0.02	-2.30
OCC	329	0.02	338	0.02	-4.63
WebSupport, s.r.o.	298	0.01	281	0.01	3.91
TrustSign Certificadora Digital	298	0.01	336	0.02	-13.10
INTERWORX LLC	278	0.01	272	0.01	0.14
FNMT	269	0.01	290	0.01	-9.11
Vodafone Group	268	0.01	284	0.01	-7.54
AC Camerfirma SA	261	0.01	259	0.01	-1.26
DREAMSCAPE NETWORKS FZ-LLC	257	0.01	269	0.01	-6.39
Pavel&Pavel	252	0.01	251	0.01	-1.63
Universitaet Stuttgart	248	0.01	248	0.01	-2.02
Rede Nacional de Ensino e Pesquisa - RNP	235	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.