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	March 2025 Count	March 2025 %	February 2025 Count	February 2025 %	Growth %
Let's Encrypt	4,099,404	37.86	4,035,295	37.64	0.60
Sectigo Limited	1,863,263	17.21	1,836,781	17.13	0.45
DigiCert	883,134	8.16	889,180	8.29	-1.65
Unknown	654,438	6.04	646,467	6.03	0.25
GlobalSign nv-sa	493,746	4.56	490,142	4.57	-0.24
Amazon	209,288	1.93	215,629	2.01	-3.89
GoDaddy.com, Inc.	193,121	1.78	197,564	1.84	-3.20
CloudSecure Corporation	179,957	1.66	178,635	1.67	-0.24
Google Trust Services	174,982	1.62	171,937	1.60	0.78
New Dream Network LLC dba Dreamhost	115,842	1.07	115,076	1.07	-0.31
Gehirn Inc.	111,959	1.03	111,458	1.04	-0.53
Starfield Technologies, Inc.	109,050	1.01	107,322	1.00	0.62
Unizeto Technologies S.A.	108,133	1.00	102,474	0.96	4.50
Plesk	99,617	0.92	99,241	0.93	-0.60
SomeOrganization	65,602	0.61	66,805	0.62	-2.76
Microsoft Corporation	59,714	0.55	58,796	0.55	0.57
ddos-guard	59,209	0.55	58,634	0.55	-0.00
GEANT Vereniging	56,000	0.52	56,650	0.53	-2.11
ZeroSSL	51,007	0.47	49,139	0.46	2.79
ispgateway	50,417	0.47	50,410	0.47	-0.96
home.pl S.A.	45,372	0.42	44,912	0.42	0.04
Internet Widgits Pty Ltd	44,467	0.41	45,657	0.43	-3.55
TrustAsia Technologies, Inc.	44,215	0.41	44,297	0.41	-1.16
cPanel, Inc.	43,309	0.40	44,315	0.41	-3.22
Actalis S.p.A.	41,004	0.38	40,559	0.38	0.11
Japan Registry Services Co., Ltd.	37,012	0.34	36,012	0.34	1.78
none	36,552	0.34	36,734	0.34	-1.46
GoGetSSL	34,782	0.32	36,697	0.34	-6.14
DigiCert, Inc.	33,186	0.31	32,575	0.30	0.88
Internet2	31,804	0.29	31,716	0.30	-0.70
Acme Co	30,451	0.28	29,096	0.27	3.64
Unspecified	25,032	0.23	24,251	0.23	2.22
Default Company Ltd	25,017	0.23	25,054	0.23	-1.12
SH	22,447	0.21	22,454	0.21	-1.00
AfterMarket.pl	21,416	0.20	18,853	0.18	12.49
Soluciones Corporativas IP, SL	20,363	0.19	20,251	0.19	-0.43
COMODO CA Limited	19,397	0.18	19,265	0.18	-0.29
Gandi	19,297	0.18	19,413	0.18	-1.56
nazwa.pl Sp. z o.o.	17,691	0.16	17,515	0.16	0.02
World4You Internet Services GmbH	15,960	0.15	15,891	0.15	-0.54
Apache HTTP Server	14,727	0.14	14,730	0.14	-0.99
SECOM Trust Systems CO.,LTD.	13,887	0.13	14,472	0.13	-4.98
Test Self SSL Company	13,885	0.13	13,778	0.13	-0.20
WoTrus CA Limited	13,525	0.12	12,654	0.12	5.84
Parallels	13,520	0.12	13,642	0.13	-1.86
FASTPANEL	13,333	0.12	12,815	0.12	3.03
Beijing Knownsec Information Technology Co., Ltd	13,329	0.12	13,727	0.13	-3.84
Beijing Xinchacha Credit Management Co., Ltd.	12,201	0.11	12,028	0.11	0.45
Cybertrust Japan Co., Ltd.	11,765	0.11	11,662	0.11	-0.10
Entrust, Inc.	11,522	0.11	12,220	0.11	-6.63
Basekit Ltd	11,444	0.11	11,340	0.11	-0.06
Odin	10,436	0.10	10,583	0.10	-2.35
KAGOYA-JAPAN	10,058	0.09	10,061	0.09	-1.00
cyber_Folks S.A.	9,624	0.09	9,593	0.09	-0.65
XX	9,384	0.09	9,204	0.09	0.96
The Trustico Group Ltd	9,173	0.08	8,908	0.08	1.97
SSL Corporation	9,148	0.08	8,548	0.08	5.98
DirectAdmin Self-Signed	9,006	0.08	8,864	0.08	0.61
o2switch	8,672	0.08	8,608	0.08	-0.24
www.sprinthost.ru	8,301	0.08	8,273	0.08	-0.64
dhosting.pl Sp. z o.o.	7,858	0.07	7,800	0.07	-0.24
cPanel, LLC	7,371	0.07	10,654	0.10	-31.49
CloudFlare, Inc.	6,977	0.06	6,626	0.06	4.27
Organization	6,923	0.06	6,880	0.06	-0.35
LiteSpeedCommunity	6,849	0.06	6,687	0.06	1.43
FASTVPS	6,015	0.06	5,123	0.05	16.27
GeoTrust Inc.	5,872	0.05	5,903	0.06	-1.49
Hestia Control Panel	5,676	0.05	5,014	0.05	12.10
Network Solutions L.L.C.	5,653	0.05	5,633	0.05	-0.62
Zhejiang Huluwa Digital Certification Co., Ltd.	5,569	0.05	5,501	0.05	0.25
sslTrus	5,548	0.05	5,187	0.05	5.92
TAIWAN-CA	5,374	0.05	5,375	0.05	-0.99
My Company Ltd	5,372	0.05	4,969	0.05	7.06
Alpiro s.r.o.	5,361	0.05	5,569	0.05	-4.67
GMO CLOUD K.K.	5,166	0.05	5,188	0.05	-1.39
Gandi SAS	4,940	0.05	4,381	0.04	11.66
Trust Provider B.V.	4,904	0.05	4,819	0.04	0.77
ovipanel	4,876	0.05	4,874	0.05	-0.93
Certainly	4,814	0.04	4,524	0.04	5.37
Certera	4,677	0.04	4,688	0.04	-1.21
DivMulTech LLC	3,592	0.03	3,592	0.03	-0.97
PerfectSSL	3,537	0.03	3,476	0.03	0.76
CentOS Web Panel	3,369	0.03	3,634	0.03	-8.19
Webador	3,361	0.03	3,277	0.03	1.57
Baidu, Inc.	3,360	0.03	3,325	0.03	0.07
x	3,323	0.03	3,309	0.03	-0.55
DNSPod, Inc.	3,289	0.03	3,226	0.03	0.96
Guardian Inc.	3,142	0.03	3,135	0.03	-0.75
SSL Server	3,134	0.03	3,135	0.03	-1.00
Nijimo K.K.	3,029	0.03	2,515	0.02	19.27
ACME	3,018	0.03	2,944	0.03	1.52
Deutsche Telekom Security GmbH	3,004	0.03	2,969	0.03	0.19
Rede Nacional de Ensino e Pesquisa - RNP	2,997	0.03	3,031	0.03	-2.08
Dattatec.com	2,882	0.03	2,845	0.03	0.31
Skok.CZ	2,595	0.02	2,579	0.02	-0.36
ZONER Software, a.s.	2,581	0.02	2,581	0.02	-0.97
WEDOS GLOBAL	2,487	0.02	2,593	0.02	-5.02
SpinupWP	2,420	0.02	0	0.00	N/A
Fortinet Inc.	2,420	0.02	2,360	0.02	1.54
Hellenic Academic and Research Institutions CA	2,348	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.