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 2019 Count	May 2019 %	April 2019 Count	April 2019 %	Growth %
COMODO CA Limited	1,349,044	24.47	1,309,700	26.15	-6.42
Let's Encrypt	963,413	17.47	821,301	16.40	6.58
DigiCert	905,755	16.43	850,121	16.97	-3.20
GlobalSign nv-sa	369,469	6.70	358,258	7.15	-6.30
GoDaddy.com, Inc.	244,845	4.44	227,130	4.53	-2.06
cPanel, Inc.	206,922	3.75	178,154	3.56	5.53
Sectigo Limited	186,345	3.38	122,352	2.44	38.37
Unknown	156,033	2.83	137,546	2.75	3.07
Amazon	120,567	2.19	109,874	2.19	-0.30
Starfield Technologies, Inc.	78,995	1.43	66,358	1.32	8.16
Google Trust Services	60,185	1.09	58,941	1.18	-7.23
Internet2	37,182	0.67	35,580	0.71	-5.05
Plesk	36,874	0.67	30,600	0.61	9.48
SomeOrganization	36,190	0.66	31,762	0.63	3.52
TERENA	35,719	0.65	33,565	0.67	-3.31
ispgateway	33,467	0.61	29,650	0.59	2.55
Microsoft Corporation	33,151	0.60	30,647	0.61	-1.72
none	31,734	0.58	27,851	0.56	3.52
Unizeto Technologies S.A.	31,094	0.56	29,010	0.58	-2.62
GeoTrust Inc.	28,864	0.52	27,945	0.56	-6.16
SecureCore	28,206	0.51	21,879	0.44	17.13
Entrust, Inc.	27,524	0.50	26,025	0.52	-3.91
Trustwave Holdings, Inc.	25,351	0.46	23,019	0.46	0.06
Parallels	24,152	0.44	21,969	0.44	-0.12
Gandi	24,073	0.44	22,919	0.46	-4.57
CloudFlare, Inc.	20,177	0.37	1,983	0.04	824.45
Odin	18,920	0.34	16,764	0.33	2.54
Gehirn Inc.	18,568	0.34	13,416	0.27	25.74
home.pl S.A.	16,635	0.30	15,095	0.30	0.12
Apache HTTP Server	14,940	0.27	14,785	0.30	-8.19
Network Solutions L.L.C.	14,557	0.26	14,107	0.28	-6.25
QuoVadis Limited	13,005	0.24	12,496	0.25	-5.44
DreamHost	12,432	0.23	9,130	0.18	23.71
Cybertrust Japan Co., Ltd.	11,192	0.20	12,185	0.24	-16.55
Actalis S.p.A./03358520967	11,036	0.20	9,097	0.18	10.22
Internet Widgits Pty Ltd	9,458	0.17	8,922	0.18	-3.69
Webhosting	8,933	0.16	7,268	0.15	11.67
nazwa.pl sp. z o.o.	8,320	0.15	7,236	0.14	4.47
SECOM Trust Systems CO.,LTD.	7,773	0.14	6,499	0.13	8.67
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.	6,723	0.12	5,787	0.12	5.55
Corporation Service Company	6,293	0.11	5,914	0.12	-3.32
Japan Registry Services Co., Ltd.	6,225	0.11	4,508	0.09	25.46
WebSupport, s.r.o.	6,014	0.11	5,234	0.10	4.39
io.ua	6,012	0.11	5,929	0.12	-7.87
Trust Provider B.V.	5,754	0.10	4,952	0.10	5.57
The Trustico Group Ltd	5,591	0.10	5,132	0.10	-1.02
TrustAsia Technologies, Inc.	5,411	0.10	4,371	0.09	12.47
StartCom Ltd.	5,304	0.10	5,338	0.11	-9.72
Hosting Ukraine LLC	5,269	0.10	4,634	0.09	3.30
thawte, Inc.	4,328	0.08	4,219	0.08	-6.80
Nijimo, Inc.	4,080	0.07	3,931	0.08	-5.70
SH	3,615	0.07	2,998	0.06	9.55
DOMENY.PL sp. z o.o	3,587	0.07	3,213	0.06	1.43
GeoTrust, Inc.	3,468	0.06	3,415	0.07	-7.74
HydrantID (Avalanche Cloud Corporation)	3,464	0.06	3,376	0.07	-6.78
Pizza-Taxi.de GmbH / CA	3,418	0.06	3,381	0.07	-8.15
WEDOS Internet, a.s.	3,416	0.06	2,786	0.06	11.40
Acme Co	3,240	0.06	2,514	0.05	17.09
Default Company Ltd	3,053	0.06	2,660	0.05	4.28
World4You Internet Services GmbH	2,719	0.05	2,133	0.04	15.82
KAGOYA-JAPAN	2,651	0.05	2,325	0.05	3.59
Comodo Limited	2,621	0.05	2,353	0.05	1.20
National Institute of Informatics	2,551	0.05	2,405	0.05	-3.63
Symantec Corporation	2,523	0.05	2,663	0.05	-13.92
XX	2,457	0.04	2,157	0.04	3.49
Test Self SSL Company	2,449	0.04	2,151	0.04	3.44
Rede Nacional de Ensino e Pesquisa - RNP	2,266	0.04	2,075	0.04	-0.78
TAIWAN-CA	2,260	0.04	2,122	0.04	-3.24
SwissSign AG	2,205	0.04	2,044	0.04	-1.99
T-Systems International GmbH	2,161	0.04	1,982	0.04	-0.94
Dreamcommerce S.A.	2,063	0.04	1,296	0.03	44.62
SSL.com	1,995	0.04	2,067	0.04	-12.31
www.sprinthost.ru	1,993	0.04	1,679	0.03	7.85
Soluciones Corporativas IP, SL	1,988	0.04	1,552	0.03	16.38
KDDI Web Communications Inc.	1,907	0.03	2,210	0.04	-21.60
Mirohost	1,675	0.03	1,469	0.03	3.60
WoSign CA Limited	1,629	0.03	1,593	0.03	-7.09
NetLock Kft.	1,629	0.03	1,456	0.03	1.65
Buypass AS-983163327	1,614	0.03	1,448	0.03	1.27
MyCompany	1,554	0.03	1,455	0.03	-2.96
EUNETIC GmbH	1,542	0.03	1,396	0.03	0.36
Government of Korea	1,522	0.03	1,645	0.03	-15.94
AC Camerfirma S.A.	1,493	0.03	1,521	0.03	-10.82
Guardian Inc.	1,439	0.03	1,148	0.02	13.89
Verisign	1,389	0.03	1,268	0.03	-0.48
dhosting.pl Sp. z o.o.	1,317	0.02	1,150	0.02	4.05
CertCenter AG	1,233	0.02	1,143	0.02	-1.99
UIC	1,171	0.02	1,170	0.02	-9.07
AffirmTrust	1,151	0.02	1,319	0.03	-20.72
Globe Hosting, Inc.	1,015	0.02	862	0.02	6.98
OVH	952	0.02	820	0.02	5.48
GMO CLOUD K.K.	915	0.02	771	0.02	7.82
WoTrus CA Limited	911	0.02	779	0.02	6.25
Comvive Servidores SL	873	0.02	770	0.02	3.01
N/A	797	0.01	0	0.00	N/A
SSL Corporation	770	0.01	0	0.00	N/A
FASTVPS	768	0.01	0	0.00	N/A
Beijing Knownsec Information Technology Co., Ltd	767	0.01	720	0.01	-3.21
DHIMYOTIS	757	0.01	712	0.01	-3.40
Greenhost	753	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.