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	September 2017 Count	September 2017 %	August 2017 Count	August 2017 %	Growth %
DigiCert	4,979,845	59.93	4,156,140	56.66	5.77
GoDaddy.com, Inc.	728,810	8.77	709,156	9.67	-9.28
COMODO CA Limited	642,836	7.74	607,056	8.28	-6.52
GeoTrust Inc.	435,713	5.24	425,847	5.81	-9.68
GlobalSign nv-sa	295,485	3.56	281,381	3.84	-7.30
Let's Encrypt	212,081	2.55	181,499	2.47	3.15
Symantec Corporation	126,744	1.53	126,251	1.72	-11.38
Gandi	97,778	1.18	96,847	1.32	-10.88
thawte, Inc.	75,513	0.91	74,268	1.01	-10.24
Unknown	55,246	0.66	48,463	0.66	0.63
cPanel, Inc.	55,080	0.66	46,659	0.64	4.21
Amazon	51,921	0.62	45,752	0.62	0.18
Starfield Technologies, Inc.	50,902	0.61	49,230	0.67	-8.73
Microsoft Corporation	39,188	0.47	38,134	0.52	-9.28
Google Inc	31,614	0.38	28,013	0.38	-0.38
Internet2	29,466	0.35	30,279	0.41	-14.10
TERENA	27,137	0.33	26,395	0.36	-9.24
Entrust, Inc.	23,760	0.29	23,467	0.32	-10.62
Parallels	19,754	0.24	18,891	0.26	-7.69
Network Solutions L.L.C.	19,498	0.23	19,651	0.27	-12.41
Trustwave Holdings, Inc.	17,431	0.21	16,631	0.23	-7.48
Unizeto Technologies S.A.	15,475	0.19	14,056	0.19	-2.81
SomeOrganization	15,134	0.18	14,346	0.20	-6.88
none	13,797	0.17	12,367	0.17	-1.52
StartCom Ltd.	11,518	0.14	18,482	0.25	-44.99
QuoVadis Limited	9,459	0.11	9,280	0.13	-10.02
DreamHost	8,932	0.11	8,099	0.11	-2.65
NN.RU	8,882	0.11	8,882	0.12	-11.72
Odin	8,454	0.10	7,879	0.11	-5.28
GeoTrust, Inc.	8,301	0.10	8,601	0.12	-14.80
SecureCore	7,829	0.09	6,795	0.09	1.71
Cybertrust Japan Co., Ltd.	7,720	0.09	7,439	0.10	-8.39
home.pl S.A.	6,379	0.08	5,945	0.08	-5.28
Plesk	5,588	0.07	4,602	0.06	7.19
SSL.com	5,566	0.07	4,694	0.06	4.67
Internet Widgits Pty Ltd	5,298	0.06	4,792	0.07	-2.40
Hostpoint AG	5,066	0.06	0	0.00	N/A
nazwa.pl sp. z o.o.	4,151	0.05	3,860	0.05	-5.07
ispgateway	3,616	0.04	3,518	0.05	-9.27
Comodo Limited	3,530	0.04	3,613	0.05	-13.75
SECOM Trust Systems CO.,LTD.	3,401	0.04	3,396	0.05	-11.59
io.ua	3,096	0.04	2,660	0.04	2.74
CloudFlare, Inc.	3,056	0.04	2,813	0.04	-4.10
Corporation Service Company	3,054	0.04	2,943	0.04	-8.40
KDDI Web Communications Inc.	2,851	0.03	2,766	0.04	-9.01
Trust Provider B.V.	2,719	0.03	2,514	0.03	-4.53
Pizza-Taxi.de GmbH / CA	2,496	0.03	2,236	0.03	-1.46
National Institute of Informatics	2,203	0.03	2,126	0.03	-8.53
Verisign	2,113	0.03	2,740	0.04	-31.92
Thawte, Inc.	2,103	0.03	2,243	0.03	-17.23
Government of Korea	2,103	0.03	2,062	0.03	-9.97
WoSign CA Limited	1,994	0.02	2,025	0.03	-13.08
WebSupport, s.r.o.	1,992	0.02	1,695	0.02	3.74
Actalis S.p.A./03358520967	1,930	0.02	1,562	0.02	9.07
T-Systems International GmbH	1,695	0.02	1,709	0.02	-12.45
TAIWAN-CA	1,645	0.02	1,480	0.02	-1.88
DOMENY.PL sp. z o.o	1,603	0.02	1,577	0.02	-10.27
Hosting Ukraine LLC	1,549	0.02	1,302	0.02	5.02
Equifax (Geotrust)	1,471	0.02	1,550	0.02	-16.22
Default Company Ltd	1,356	0.02	1,110	0.02	7.84
Rede Nacional de Ensino e Pesquisa - RNP	1,318	0.02	1,257	0.02	-7.44
KEYNECTIS	1,293	0.02	1,259	0.02	-9.34
SwissSign AG	1,288	0.02	1,258	0.02	-9.62
EUNETIC GmbH	1,215	0.01	1,194	0.02	-10.17
AlphaSSL	1,180	0.01	1,200	0.02	-13.20
UIC	1,170	0.01	1,168	0.02	-11.57
Japan Registry Services Co., Ltd.	1,105	0.01	993	0.01	-1.77
U.S. Government	1,070	0.01	1,073	0.01	-11.97
NetLock Kft.	1,068	0.01	1,040	0.01	-9.35
Webhosting	1,012	0.01	790	0.01	13.08
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	1,007	0.01	859	0.01	3.48
AC Camerfirma S.A.	975	0.01	936	0.01	-8.05
Dreamcommerce S.A.	948	0.01	900	0.01	-7.02
Test Self SSL Company	851	0.01	718	0.01	4.63
Nijimo, Inc.	835	0.01	697	0.01	5.75
WEDOS Internet, a.s.	799	0.01	676	0.01	4.34
Globe Hosting, Inc.	772	0.01	722	0.01	-5.61
XX	756	0.01	632	0.01	5.60
Volusion, Inc.	746	0.01	807	0.01	-18.40
CAcert Inc.	657	0.01	657	0.01	-11.72
TBS INTERNET	646	0.01	640	0.01	-10.90
Buypass AS-983163327	644	0.01	614	0.01	-7.41
Trend Micro Inc	642	0.01	692	0.01	-18.10
Intermediate Certificate	619	0.01	602	0.01	-9.23
FNMT-RCM	618	0.01	622	0.01	-12.29
SH	605	0.01	501	0.01	6.60
Zimbra Collaboration Server	590	0.01	584	0.01	-10.82
Apache HTTP Server	558	0.01	497	0.01	-0.89
ACCV	532	0.01	526	0.01	-10.72
AffirmTrust	526	0.01	455	0.01	2.05
Root CA	523	0.01	536	0.01	-13.87
ICP-Brasil	500	0.01	494	0.01	-10.65
TrustAsia Technologies, Inc.	486	0.01	393	0.01	9.16
HydrantID (Avalanche Cloud Corporation)	473	0.01	477	0.01	-12.47
Beijing Knownsec Information Technology Co., Ltd	469	0.01	436	0.01	-5.04
Thawte	446	0.01	462	0.01	-14.78
Internet Invest	444	0.01	0	0.00	N/A
Verizon Enterprise Solutions	435	0.01	498	0.01	-22.89
Comodo CA Limited	431	0.01	505	0.01	-24.66
Intexmedia	429	0.01	429	0.01	-11.72

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.