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 2025 Count	May 2025 %	April 2025 Count	April 2025 %	Growth %
Let's Encrypt	4,177,890	38.30	4,181,475	38.08	0.57
Sectigo Limited	1,846,598	16.93	1,879,611	17.12	-1.11
DigiCert	876,487	8.03	891,029	8.11	-0.99
Unknown	672,045	6.16	667,642	6.08	1.32
GlobalSign nv-sa	485,494	4.45	498,656	4.54	-2.00
Amazon	205,192	1.88	205,060	1.87	0.72
GoDaddy.com, Inc.	185,003	1.70	193,078	1.76	-3.56
CloudSecure Corporation	183,704	1.68	182,338	1.66	1.41
Google Trust Services	180,404	1.65	177,576	1.62	2.26
Unizeto Technologies S.A.	122,693	1.12	121,574	1.11	1.58
New Dream Network LLC dba Dreamhost	116,600	1.07	116,845	1.06	0.44
Gehirn Inc.	113,228	1.04	112,806	1.03	1.03
Starfield Technologies, Inc.	102,352	0.94	101,351	0.92	1.65
Plesk	99,093	0.91	99,657	0.91	0.08
SomeOrganization	64,405	0.59	66,240	0.60	-2.13
Microsoft Corporation	61,011	0.56	60,945	0.56	0.76
ddos-guard	59,789	0.55	60,342	0.55	-0.27
ZeroSSL	54,217	0.50	54,390	0.50	0.33
GEANT Vereniging	48,460	0.44	53,199	0.48	-8.31
ispgateway	48,451	0.44	50,376	0.46	-3.19
Internet Widgits Pty Ltd	44,964	0.41	46,608	0.42	-2.90
Actalis S.p.A.	42,963	0.39	41,993	0.38	2.98
cPanel, Inc.	39,788	0.36	42,855	0.39	-6.55
Japan Registry Services Co., Ltd.	38,027	0.35	37,553	0.34	1.92
DigiCert, Inc.	34,635	0.32	36,484	0.33	-4.45
Acme Co	34,477	0.32	32,356	0.29	7.25
GoGetSSL	34,223	0.31	35,116	0.32	-1.91
home.pl S.A.	34,208	0.31	43,968	0.40	-21.69
none	34,124	0.31	35,625	0.32	-3.59
TrustAsia Technologies, Inc.	33,930	0.31	35,112	0.32	-2.73
Internet2	31,331	0.29	31,014	0.28	1.68
Unspecified	26,421	0.24	25,992	0.24	2.32
Default Company Ltd	24,745	0.23	25,486	0.23	-2.27
SH	22,361	0.20	22,490	0.20	0.08
AfterMarket.pl	20,242	0.19	19,928	0.18	2.24
COMODO CA Limited	20,046	0.18	18,100	0.16	11.48
PerfectSSL	18,774	0.17	3,561	0.03	430.66
Soluciones Corporativas IP, SL	18,743	0.17	20,207	0.18	-6.64
nazwa.pl Sp. z o.o.	17,686	0.16	17,797	0.16	0.03
Beijing Xinchacha Credit Management Co., Ltd.	16,357	0.15	12,962	0.12	27.02
World4You Internet Services GmbH	16,160	0.15	16,145	0.15	0.75
Gandi	15,877	0.15	17,609	0.16	-9.25
WoTrus CA Limited	15,356	0.14	14,592	0.13	5.92
FASTPANEL	15,267	0.14	14,129	0.13	8.76
Apache HTTP Server	14,716	0.13	14,715	0.13	0.66
Test Self SSL Company	13,913	0.13	13,958	0.13	0.33
SECOM Trust Systems CO.,LTD.	12,902	0.12	13,557	0.12	-4.21
Parallels	12,479	0.11	12,819	0.12	-2.02
Cybertrust Japan Co., Ltd.	11,904	0.11	11,901	0.11	0.68
XX	11,701	0.11	9,265	0.08	27.12
SSL Corporation	11,273	0.10	10,160	0.09	11.68
Basekit Ltd	11,120	0.10	11,453	0.10	-2.27
Beijing Knownsec Information Technology Co., Ltd	10,592	0.10	14,529	0.13	-26.62
Hellenic Academic and Research Institutions CA	10,383	0.10	5,529	0.05	89.02
Odin	10,113	0.09	10,238	0.09	-0.57
cyber_Folks S.A.	10,020	0.09	9,772	0.09	3.21
sslTrus	9,944	0.09	9,507	0.09	5.28
KAGOYA-JAPAN	9,865	0.09	10,005	0.09	-0.75
The Trustico Group Ltd	9,690	0.09	9,373	0.09	4.06
www.sprinthost.ru	8,977	0.08	8,359	0.08	8.10
o2switch	8,913	0.08	8,930	0.08	0.46
DirectAdmin Self-Signed	8,799	0.08	8,875	0.08	-0.21
dhosting.pl Sp. z o.o.	7,936	0.07	7,928	0.07	0.76
LiteSpeedCommunity	7,568	0.07	7,220	0.07	5.51
Zhejiang Huluwa Digital Certification Co., Ltd.	7,397	0.07	7,644	0.07	-2.60
Entrust, Inc.	7,103	0.07	10,396	0.09	-31.23
Gandi SAS	7,070	0.06	6,368	0.06	11.75
Organization	7,047	0.06	6,977	0.06	1.66
CloudFlare, Inc.	6,943	0.06	6,994	0.06	-0.08
Hestia Control Panel	6,323	0.06	5,971	0.05	6.59
TAIWAN-CA	6,225	0.06	5,572	0.05	12.45
My Company Ltd	5,567	0.05	5,896	0.05	-4.96
Network Solutions L.L.C.	5,539	0.05	5,670	0.05	-1.67
GeoTrust Inc.	5,521	0.05	5,825	0.05	-4.60
Certainly	5,408	0.05	5,170	0.05	5.29
GMO CLOUD K.K.	5,377	0.05	5,332	0.05	1.50
WEDOS Internet, a.s.	5,213	0.05	4,486	0.04	16.97
Alpiro s.r.o.	5,177	0.05	5,336	0.05	-2.35
FASTVPS	5,157	0.05	5,975	0.05	-13.13
cPanel, LLC	5,041	0.05	6,981	0.06	-27.32
Trust Provider B.V.	5,036	0.05	5,076	0.05	-0.14
Certera	4,754	0.04	4,762	0.04	0.49
Nijimo K.K.	3,904	0.04	3,407	0.03	15.34
mkcert development CA	3,727	0.03	0	0.00	N/A
Webador	3,601	0.03	3,493	0.03	3.77
DivMulTech LLC	3,592	0.03	3,592	0.03	0.65
DNSPod, Inc.	3,348	0.03	3,362	0.03	0.24
x	3,332	0.03	3,326	0.03	0.84
CentOS Web Panel	3,304	0.03	3,372	0.03	-1.38
ACME	3,252	0.03	3,191	0.03	2.58
SSL Server	3,129	0.03	3,132	0.03	0.56
Guardian Inc.	3,121	0.03	3,139	0.03	0.08
Deutsche Telekom Security GmbH	3,057	0.03	3,033	0.03	1.45
Dattatec.com	2,952	0.03	2,931	0.03	1.38
Rede Nacional de Ensino e Pesquisa - RNP	2,888	0.03	2,936	0.03	-0.99
WEDOS GLOBAL	2,708	0.02	2,609	0.02	4.47
Skok.CZ	2,603	0.02	2,607	0.02	0.50
SpinupWP	2,550	0.02	2,473	0.02	3.79
Fortinet Inc.	2,493	0.02	0	0.00	N/A
Greenhost	2,305	0.02	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.