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You are viewing an outdated report. The latest version of this report was published on April 1st, 2021


    
Certificate Authority Market Share Report
October 1st, 2005

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 September 2005
Count
September 2005
%
August 2005
Count
August 2005
%
Growth
%
Verisign72,19432.1371,95932.44-0.96
Equifax (Geotrust)40,06317.8338,86217.521.77
Thawte36,05116.0435,94516.20-0.99
Comodo Limited20,0828.9419,7918.920.17
Starfield Technologies, Inc.3,9381.753,5401.609.82
Entrust.net3,4181.523,3511.510.70
Unknown3,2471.443,0831.393.97
SomeOrganization2,9681.322,9851.35-1.84
The USERTRUST Network2,6681.192,8601.29-7.91
Snake Oil, Ltd2,0310.902,0270.91-1.08
SWsoft, Inc.1,6400.731,5810.712.41
U.S. Government1,3990.621,3570.611.78
ChainedSSL1,3400.601,2370.566.94
XRamp Security Services Inc1,1130.501,0780.491.93
DigiCert Inc.7790.357280.335.64
TC TrustCenter for Security in Data Networks GmbH7190.327070.320.40
IPS Certification Authority s.l.6710.306990.32-5.23
FreeSSL6150.277010.32-13.39
GlobalSign nv-sa5320.245030.234.41
Root CA4240.193920.186.78
Plesk, Inc.3200.143330.15-5.13
Network Solutions L.L.C.3110.141960.0956.65
Deutsche Telekom AG2850.132960.13-4.95
Betrusted Japan Co.,Ltd.2770.122320.1017.87
GTE Corporation2550.112630.12-4.28
Ipswitch,Inc.2140.102030.094.07
ispgateway2130.092170.10-3.10
Your Name Webhosting1650.071630.07-0.07
TDC1500.071510.07-1.93
Kubota Systems Inc.1500.071460.071.43
Plesk Inc.1400.061400.06-1.28
Apache HTTP Server1400.061330.063.92
Positive Software1380.061120.0521.64
Akamai1240.061130.058.33
Internet Widgits Pty Ltd1100.051120.05-3.04
IceWarp Software1010.041010.05-1.28
Comodo Japan Inc.990.04820.0419.19
Thawte Certification960.04980.04-3.29
NetLock Halozatbiztonsagi Kft.930.04890.043.16
Unizeto Sp. z o.o.920.04880.043.21
Digital Signature Trust Co.910.04910.04-1.28
OCC890.04830.045.86
Equifax Secure Inc720.03710.030.11
ICS_TREE680.03680.03-1.28
Baltimore Technologies Japan Co.,Ltd.620.03850.04-27.99
Azero610.03610.03-1.28
United Network Communications Co., Ltd.590.03590.03-1.28
CNRS580.03560.032.25
CsideNet570.03560.030.49
CRU560.02490.0212.83
RM550.02510.026.47
ICP-Brasil540.02510.024.53
XYZ Corporation530.02570.03-8.21
Japan Certification Services, Inc.520.02490.024.77
Sun Microsystems Inc510.02490.022.75
Stunnel Developers Ltd500.02510.02-3.21
WebMoney Transfer460.02480.02-5.39
My Company Ltd460.02420.028.12
NTT Communications Corporation450.02410.028.35
Firstserver, Inc.450.02410.028.35
MULTICERT-CA440.02450.02-3.47
GlobalSign Inc430.02380.0211.71
UniCERT Brasil Certificadora410.02400.021.19
SCNC410.02410.02-1.28
Stalker Software, Inc.380.02370.021.39
FNMT380.02360.024.21
Beocity380.02380.02-1.28
Advanced Extranet Server350.02370.02-6.61
University of Maryland340.02330.011.71
Etisalat340.02330.011.71
Trusted Secure Certificate Authority330.01280.0116.35
IceWarp Ltd.330.01320.011.81
CETI330.01330.01-1.28
Audkenni hf.330.01290.0112.34
Hostgator320.01300.015.30
SuSE Linux Web Server310.01290.015.53
StartCom Ltd.310.01250.0122.42
Positive Software Corporation310.01240.0127.52
DFN-CERT Services GmbH310.01320.01-4.36
Webmin Software300.01310.01-4.46
Temp Certificate!300.01310.01-4.46
Carnegie Mellon University300.01290.012.13
CFC290.01290.01-1.28
A-Trust Ges. f. Sicherheitssysteme im elektr. Datenverkehr GmbH290.01280.012.25
domainsofnote.com280.01280.01-1.28
University of Helsinki280.01280.01-1.28
Pro Futuro S.A.270.01270.01-1.28
S1 Corporation260.0100.00N/A
NeoNova B.V.260.01260.01-1.28
Massachusetts Institute of Technology260.01260.01-1.28
ISPAdmin260.01230.0111.60
Franke & Partner260.01260.01-1.28
cv. Candi Internet250.01280.01-11.85
Your Name250.01280.01-11.85
Sun Cobalt250.01260.01-5.07
Brno University of Technology250.01250.01-1.28
AddTrust AB250.0100.00N/A
TAIWAN-CA.COM Inc.240.01270.01-12.25
Prvni certifikacni autorita a.s.240.01230.013.01
1&1 Internet Limited240.0100.00N/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.



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