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	April 2019 Count	April 2019 %	March 2019 Count	March 2019 %	Growth %
COMODO CA Limited	1,309,700	26.15	124,460	19.87	31.58
DigiCert	850,121	16.97	148,906	23.78	-28.62
Let's Encrypt	821,301	16.40	95,700	15.28	7.31
GlobalSign nv-sa	358,258	7.15	34,900	5.57	28.35
GoDaddy.com, Inc.	227,130	4.53	33,730	5.39	-15.80
cPanel, Inc.	178,154	3.56	27,904	4.46	-20.17
Unknown	137,546	2.75	15,690	2.51	9.61
Sectigo Limited	122,352	2.44	16,335	2.61	-6.35
Amazon	109,874	2.19	15,089	2.41	-8.95
Starfield Technologies, Inc.	66,358	1.32	7,479	1.19	10.94
Google Trust Services	58,941	1.18	2,631	0.42	180.11
Internet2	35,580	0.71	5,734	0.92	-22.41
TERENA	33,565	0.67	7,122	1.14	-41.07
SomeOrganization	31,762	0.63	3,530	0.56	12.50
Microsoft Corporation	30,647	0.61	2,258	0.36	69.71
Plesk	30,600	0.61	4,341	0.69	-11.86
ispgateway	29,650	0.59	3,897	0.62	-4.87
Unizeto Technologies S.A.	29,010	0.58	3,240	0.52	11.95
GeoTrust Inc.	27,945	0.56	4,670	0.75	-25.18
none	27,851	0.56	4,035	0.64	-13.70
Entrust, Inc.	26,025	0.52	3,885	0.62	-16.24
Trustwave Holdings, Inc.	23,019	0.46	1,905	0.30	51.09
Gandi	22,919	0.46	2,945	0.47	-2.69
Parallels	21,969	0.44	3,331	0.53	-17.54
SecureCore	21,879	0.44	2,517	0.40	8.69
Odin	16,764	0.33	2,509	0.40	-16.46
home.pl S.A.	15,095	0.30	2,446	0.39	-22.84
Apache HTTP Server	14,785	0.30	135	0.02	1269.37
Network Solutions L.L.C.	14,107	0.28	2,024	0.32	-12.85
Gehirn Inc.	13,416	0.27	1,280	0.20	31.05
QuoVadis Limited	12,496	0.25	1,927	0.31	-18.92
Cybertrust Japan Co., Ltd.	12,185	0.24	1,045	0.17	45.79
DreamHost	9,130	0.18	1,039	0.17	9.87
Actalis S.p.A./03358520967	9,097	0.18	1,108	0.18	2.66
Internet Widgits Pty Ltd	8,922	0.18	361	0.06	209.02
Webhosting	7,268	0.15	1,173	0.19	-22.53
nazwa.pl sp. z o.o.	7,236	0.14	879	0.14	2.93
SECOM Trust Systems CO.,LTD.	6,499	0.13	823	0.13	-1.26
io.ua	5,929	0.12	0	0.00	N/A
Corporation Service Company	5,914	0.12	981	0.16	-24.62
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	5,787	0.12	927	0.15	-21.94
StartCom Ltd.	5,338	0.11	416	0.07	60.44
WebSupport, s.r.o.	5,234	0.10	760	0.12	-13.89
The Trustico Group Ltd	5,132	0.10	522	0.08	22.93
Trust Provider B.V.	4,952	0.10	869	0.14	-28.75
Hosting Ukraine LLC	4,634	0.09	559	0.09	3.65
Japan Registry Services Co., Ltd.	4,508	0.09	782	0.12	-27.92
TrustAsia Technologies, Inc.	4,371	0.09	457	0.07	19.59
thawte, Inc.	4,219	0.08	661	0.11	-20.19
Nijimo, Inc.	3,931	0.08	397	0.06	23.81
GeoTrust, Inc.	3,415	0.07	543	0.09	-21.36
Pizza-Taxi.de GmbH / CA	3,381	0.07	0	0.00	N/A
HydrantID (Avalanche Cloud Corporation)	3,376	0.07	746	0.12	-43.42
DOMENY.PL sp. z o.o	3,213	0.06	365	0.06	10.07
SH	2,998	0.06	341	0.05	9.93
WEDOS Internet, a.s.	2,786	0.06	352	0.06	-1.04
Symantec Corporation	2,663	0.05	483	0.08	-31.06
Default Company Ltd	2,660	0.05	324	0.05	2.65
Acme Co	2,514	0.05	243	0.04	29.36
National Institute of Informatics	2,405	0.05	473	0.08	-36.43
Comodo Limited	2,353	0.05	305	0.05	-3.54
KAGOYA-JAPAN	2,325	0.05	400	0.06	-27.32
KDDI Web Communications Inc.	2,210	0.04	370	0.06	-25.32
XX	2,157	0.04	400	0.06	-32.57
Test Self SSL Company	2,151	0.04	297	0.05	-9.44
World4You Internet Services GmbH	2,133	0.04	194	0.03	37.47
TAIWAN-CA	2,122	0.04	339	0.05	-21.73
Rede Nacional de Ensino e Pesquisa - RNP	2,075	0.04	728	0.12	-64.36
SSL.com	2,067	0.04	404	0.06	-36.03
SwissSign AG	2,044	0.04	392	0.06	-34.80
CloudFlare, Inc.	1,983	0.04	0	0.00	N/A
T-Systems International GmbH	1,982	0.04	327	0.05	-24.21
www.sprinthost.ru	1,679	0.03	150	0.02	39.96
Government of Korea	1,645	0.03	337	0.05	-38.97
WoSign CA Limited	1,593	0.03	284	0.05	-29.87
Soluciones Corporativas IP, SL	1,552	0.03	110	0.02	76.41
AC Camerfirma S.A.	1,521	0.03	277	0.04	-31.34
Mirohost	1,469	0.03	147	0.02	24.95
NetLock Kft.	1,456	0.03	245	0.04	-25.69
MyCompany	1,455	0.03	443	0.07	-58.93
Buypass AS-983163327	1,448	0.03	241	0.04	-24.88
EUNETIC GmbH	1,396	0.03	155	0.02	12.61
AffirmTrust	1,319	0.03	224	0.04	-26.37
Dreamcommerce S.A.	1,296	0.03	459	0.07	-64.70
Verisign	1,268	0.03	122	0.02	29.95
UIC	1,170	0.02	0	0.00	N/A
dhosting.pl Sp. z o.o.	1,150	0.02	0	0.00	N/A
Guardian Inc.	1,148	0.02	0	0.00	N/A
CertCenter AG	1,143	0.02	205	0.03	-30.29
Globe Hosting, Inc.	862	0.02	240	0.04	-55.09
OVH	820	0.02	0	0.00	N/A
Thawte, Inc.	780	0.02	126	0.02	-22.60
WoTrus CA Limited	779	0.02	0	0.00	N/A
GMO CLOUD K.K.	771	0.02	104	0.02	-7.31
Comvive Servidores SL	770	0.02	0	0.00	N/A
Equifax (Geotrust)	748	0.01	0	0.00	N/A
Fiducia & GAD IT AG	745	0.01	162	0.03	-42.50
Beijing Knownsec Information Technology Co., Ltd	720	0.01	0	0.00	N/A
DHIMYOTIS	712	0.01	124	0.02	-28.21
TBS INTERNET	677	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.