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Certificate Authority Market Share Report
January 1st, 2021

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 December 2020
Count
December 2020
%
November 2020
Count
November 2020
%
Growth
%
Let's Encrypt2,792,46923.872,703,24823.561.30
Sectigo Limited2,174,50518.592,098,67918.291.60
DigiCert1,546,56213.221,534,10513.37-1.14
cPanel, Inc.693,3745.93671,4525.851.26
GlobalSign nv-sa589,0545.04595,3645.19-2.98
COMODO CA Limited431,5533.69471,3054.11-10.21
Unknown430,6743.68419,7853.660.61
GoDaddy.com, Inc.399,9883.42396,9373.46-1.18
Starfield Technologies, Inc.235,4032.01231,2322.02-0.17
Amazon226,9221.94219,7501.921.26
Cloudflare, Inc.186,2421.59177,9741.552.62
SecureCore116,8851.00113,5340.990.96
Plesk103,1720.88102,6940.90-1.48
Gehirn Inc.90,8250.7888,5130.770.62
SomeOrganization89,5200.7786,6170.761.35
Unizeto Technologies S.A.87,5260.7585,5700.750.30
Google Trust Services86,9680.7485,8370.75-0.65
none85,9940.7484,0030.730.39
ispgateway68,5870.5968,5630.60-1.90
DreamHost62,8950.5459,7510.523.22
Microsoft Corporation58,6440.5057,8110.50-0.53
Internet254,4060.4754,3050.47-1.76
GoGetSSL44,3200.3832,2860.2834.61
home.pl S.A.41,8960.3640,8730.360.52
Actalis S.p.A.40,0120.3438,9960.340.62
TERENA39,0520.3340,6810.35-5.86
Parallels37,4320.3238,1540.33-3.79
Odin37,1480.3240,0720.35-9.09
Gandi36,3390.3135,5720.310.18
Entrust, Inc.36,3330.3136,2740.32-1.78
Trustwave Holdings, Inc.30,7990.2630,9040.27-2.27
Webhosting29,9860.2629,5520.26-0.50
TrustAsia Technologies, Inc.28,4340.2425,4820.229.42
GeoTrust Inc.24,5220.2125,0970.22-4.18
Japan Registry Services Co., Ltd.22,6370.1922,1530.190.20
GEANT Vereniging21,1140.1818,8440.169.87
Cybertrust Japan Co., Ltd.19,9910.1721,6340.19-9.39
Internet Widgits Pty Ltd17,2710.1517,1920.15-1.49
Apache HTTP Server16,3600.1416,3550.14-1.91
QuoVadis Limited16,2790.1417,0440.15-6.34
Acme Co15,6030.1315,4310.13-0.85
SECOM Trust Systems CO.,LTD.15,5080.1315,2840.13-0.50
Network Solutions L.L.C.15,2020.1314,9510.13-0.29
WebSupport, s.r.o.15,1040.1314,9220.13-0.74
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.14,9760.1314,8520.13-1.12
Soluciones Corporativas IP, SL13,6890.1213,3880.120.27
Default Company Ltd12,6830.1112,2290.111.70
Trust Provider B.V.12,6640.1112,5890.11-1.35
SH12,3710.1111,8960.101.98
ddos-guard12,1360.1011,9590.10-0.49
World4You Internet Services GmbH11,5540.1011,1470.101.64
WEDOS Internet, a.s.11,5360.1011,3270.10-0.13
Corporation Service Company9,4160.089,3850.08-1.61
DOMENY.PL sp. z o.o9,3520.089,1570.080.15
Test Self SSL Company8,7500.078,4840.071.14
KAGOYA-JAPAN8,3320.078,0850.071.06
ZeroSSL7,7420.079,7710.09-22.30
www.sprinthost.ru7,1640.066,9280.061.40
The Trustico Group Ltd6,3810.056,2570.050.01
Unspecified6,2960.055,4750.0512.77
Caddy Self-Signed5,7650.055,7910.05-2.38
XX5,5530.055,3040.052.67
CloudFlare, Inc.5,5320.055,8950.05-7.98
Dreamcommerce S.A.5,0560.044,9740.04-0.32
o2switch4,9090.044,5550.045.68
Basekit Ltd4,7080.044,0440.0414.16
TAIWAN-CA4,6880.044,5810.040.35
T-Systems International GmbH4,4590.044,4270.04-1.23
Mirohost4,2910.044,2660.04-1.36
SSL Corporation4,2270.044,0780.041.64
dhosting.pl Sp. z o.o.4,1970.044,0740.041.02
National Institute of Informatics4,0420.034,0590.04-2.35
SwissSign AG3,9400.033,8990.03-0.91
Buypass AS-9831633273,8400.033,7750.03-0.25
nazwa.pl sp. z o.o.3,7620.033,6430.031.27
GMO CLOUD K.K.3,7150.033,5810.031.73
thawte, Inc.3,7040.033,8840.03-6.48
GeoTrust, Inc.3,6560.033,7140.03-3.47
HydrantID (Avalanche Cloud Corporation)3,6230.033,3320.036.63
NetLock Kft.3,4220.033,1880.035.26
DealerInspire3,3680.033,2340.032.13
CentOS Web Panel3,2520.033,1990.03-0.31
QuoVadis Trustlink B.V.3,0500.032,2830.0231.01
SSL Server2,8400.022,8120.02-0.96
WoTrus CA Limited2,8270.022,9420.03-5.77
Guardian Inc.2,7870.022,7160.020.63
testexample2,7740.022,4950.029.03
Beijing Knownsec Information Technology Co., Ltd2,7470.022,4040.0212.05
Bitrix2,7310.022,6350.021.63
Digital Element2,6850.022,6850.02-1.94
ONEsolution s.r.o.2,6540.022,5730.021.15
unaone2,4630.022,4770.02-2.49
FASTVPS2,3510.022,2710.021.52
MyCompany2,3500.022,3090.02-0.20
Comodo Limited2,3400.022,4230.02-5.30
Fasthosts Internet Limited2,3150.022,2560.020.63
DivMulTech LLC2,2670.022,2380.02-0.67
StartCom Ltd.2,2050.022,3120.02-6.48
EUNETIC GmbH2,2000.0200.00N/A
N/A2,1230.022,9930.03-30.44

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.



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