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Certificate Authority Market Share Report
December 1st, 2019

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 November 2019
Count
November 2019
%
October 2019
Count
October 2019
%
Growth
%
Let's Encrypt1,713,61220.831,275,50020.213.08
COMODO CA Limited1,477,76717.961,268,24320.09-10.60
DigiCert1,218,29014.81975,05915.45-4.14
Sectigo Limited569,5296.92378,5406.0015.43
GlobalSign nv-sa488,5835.94314,3654.9819.24
cPanel, Inc.399,0324.85289,5014.595.75
GoDaddy.com, Inc.319,5683.88243,5623.860.67
Unknown262,1953.19193,1093.064.17
Amazon156,1761.90126,2932.00-5.12
Starfield Technologies, Inc.143,4131.74109,0491.730.90
CloudFlare, Inc.80,9600.9873,2501.16-15.20
Plesk70,8810.8653,6090.851.44
Google Trust Services68,6610.8364,9021.03-18.83
SecureCore66,0950.8046,5380.748.97
SomeOrganization59,7470.7344,9070.712.08
none55,9510.6840,5420.645.89
ispgateway53,4820.6540,3100.641.80
Microsoft Corporation49,7290.6031,6980.5020.37
Gehirn Inc.49,0140.6034,3390.549.51
Internet247,5400.5837,2810.59-2.16
TERENA46,5090.5736,0850.57-1.11
Unizeto Technologies S.A.46,3290.5633,0980.527.39
GeoTrust Inc.38,9370.4730,3800.48-1.67
Trustwave Holdings, Inc.36,1430.4419,5470.3141.87
Parallels34,6010.4226,9370.43-1.45
Entrust, Inc.34,2620.4227,5270.44-4.50
Odin31,0260.3823,5940.370.89
DreamHost30,5430.3721,8370.357.31
Gandi30,4950.3723,2200.370.76
home.pl S.A.26,2490.3219,7530.311.96
Actalis S.p.A./0335852096723,5980.2917,0300.276.31
Webhosting17,9540.2212,7590.207.96
SECOM Trust Systems CO.,LTD.17,3010.2111,6050.1814.38
Cybertrust Japan Co., Ltd.16,8950.2114,4410.23-10.24
Network Solutions L.L.C.16,1790.2013,5000.21-8.05
QuoVadis Limited15,8900.1912,7430.20-4.33
Apache HTTP Server15,7640.1915,3880.24-21.40
nazwa.pl sp. z o.o.14,4940.1810,2940.168.03
Internet Widgits Pty Ltd13,8190.1711,3950.18-6.95
Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.12,6660.159,6760.150.43
WebSupport, s.r.o.10,4550.137,8440.122.26
Japan Registry Services Co., Ltd.10,0280.127,1290.117.92
Caddy Self-Signed9,9970.127,9660.13-3.71
TrustAsia Technologies, Inc.9,7900.126,6920.1112.24
Trust Provider B.V.8,7970.116,7520.11-0.04
Corporation Service Company8,7280.116,5370.102.44
SH7,1590.095,3830.092.04
Acme Co6,9270.084,7910.0810.93
World4You Internet Services GmbH6,4940.084,4180.0712.78
io.ua6,4020.086,3390.10-22.51
WEDOS Internet, a.s.5,4940.074,9960.08-15.63
StartCom Ltd.5,4770.074,9510.08-15.12
GoGetSSL5,2770.063,8090.066.29
Default Company Ltd5,2540.063,9930.060.95
The Trustico Group Ltd5,2020.064,0460.06-1.35
KAGOYA-JAPAN4,7110.063,3830.056.84
thawte, Inc.4,7090.063,9980.06-9.63
Test Self SSL Company4,5630.063,2590.057.42
GeoTrust, Inc.4,0230.053,1370.05-1.61
XX3,9890.053,1830.05-3.85
Comodo Limited3,9380.053,0620.05-1.33
Pizza-Taxi.de GmbH / CA3,6650.043,6030.06-21.96
www.sprinthost.ru3,6430.042,6760.044.45
Dreamcommerce S.A.3,5110.043,2740.05-17.72
HydrantID (Avalanche Cloud Corporation)3,4610.043,0280.05-12.30
DOMENY.PL sp. z o.o3,4320.042,6920.04-2.19
National Institute of Informatics3,3760.042,6680.04-2.92
SwissSign AG3,3240.042,1980.0316.03
Rede Nacional de Ensino e Pesquisa - RNP3,1600.042,5470.04-4.81
TAIWAN-CA3,0930.042,2960.043.36
T-Systems International GmbH2,9560.042,5000.04-9.28
Mirohost2,8730.032,1100.034.47
Buypass AS-9831633272,6200.032,0000.030.51
Verisign2,4080.0300.00N/A
Guardian Inc.2,3190.031,4730.0220.79
Symantec Corporation2,2820.031,8290.03-4.27
NetLock Kft.2,2720.031,7190.031.41
WoSign CA Limited2,2550.031,8630.03-7.13
CertCenter AG2,0460.021,5990.03-1.83
MyCompany2,0310.021,6270.03-4.22
dhosting.pl Sp. z o.o.2,0270.021,4830.024.87
SSL Corporation2,0000.021,3180.0216.43
SSL Server1,9590.021,8780.03-19.97
DealerInspire1,9400.021,2520.0218.89
GMO CLOUD K.K.1,9310.021,4890.02-0.50
EUNETIC GmbH1,9250.021,5830.03-6.70
o2switch1,7390.0200.00N/A
WoTrus CA Limited1,7150.0200.00N/A
AC Camerfirma S.A.1,7120.021,3210.02-0.57
OVH1,6480.021,3830.02-8.57
SSL.com1,6130.021,4570.02-15.06
Soluciones Corporativas IP, SL1,6010.021,1690.025.08
N/A1,5560.0200.00N/A
Comvive Servidores SL1,5430.021,3670.02-13.40
Globe Hosting, Inc.1,5350.021,2540.02-6.08
Nijimo, Inc.1,5110.021,2690.02-8.64
ONEsolution s.r.o.1,5090.021,1440.021.20
Basekit Ltd1,4810.021,1940.02-4.83
Unspecified1,4390.0200.00N/A
Fasthosts Internet Limited1,4190.021,1020.02-1.21

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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