CertDB

Top issuers

The most active issuers of SSL certificates in the world. Full list of issuers, actual counts of signed certificates.

# Issuer Certificate count
601 Imperva Inc. 297
602 VASCO Data Security 295
603 Arbor Networks 295
604 Halon Security 295
605 A-Trust Ges. f. Sicherheitssysteme im elektr. Datenverkehr GmbH 294
606 Barracuda Networks, Inc 292
607 Movie Masher, Inc. 292
608 SonicWALL appliance 289
609 Southern Company Services, Inc. 288
610 Atos 288
611 company ltd 287
612 hp.com 286
613 Kentrox, Inc. 285
614 me 285
615 NetBotz Inc 285
616 Universitaet Bremen 284
617 RECRUIT CO.,LTD. 283
618 China Financial Certification Authority 283
619 Envenergy 282
620 Digium 281
621 Humboldt-Universitaet zu Berlin 280
622 Rackspace 278
623 BT 278
624 Yola 278
625 Research In Motion 277
626 sinfor 277
627 Orange 277
628 Universitaet Augsburg 277
629 Vultr 275
630 localhost.localdom 274
631 Schneider Electric 274
632 Georg-August-Universitaet Goettingen 274
633 Cisco ISA570-K9 273
634 AcumenHoldingsInc 273
635 Ops 273
636 WISeKey 272
637 US 271
638 ADC Technologies 270
639 epages 269
640 Astrocom Corp. 268
641 NO 268
642 Netika SARL 268
643 Keyweb AG 267
644 Nortel Networks 267
645 INFN 267
646 SDSC 267
647 ProPay, Inc. 265
648 Digidentity B.V. 264
649 Netop A/S 263
650 Oracle Corporation, Inc. 263
651 sfr 262
652 University of Washington 260
653 Trend Micro 260
654 MS 259
655 certSIGN 259
656 Bayerische Staatsbibliothek 258
657 Deutsche Post World Net 257
658 com 256
659 MyCompany Ltd. 255
660 Mirantis 255
661 Home Solutions AB 254
662 SpeedLine Solutions Inc. 253
663 VBrick Systems, Inc. 252
664 Silver Peak Systems Inc 250
665 Universitaet Tuebingen 250
666 Kubernetes 250
667 Technische Universitaet Dortmund 249
668 Dallmeier electronic 249
669 Johann Wolfgang Goethe-Universitaet 248
670 AVST 248
671 MAIL 247
672 Ministere en charge des affaires sanitaires et sociales 247
673 perso 246
674 Nintendo of America, Inc. 245
675 Hanbiro CA Root 245
676 neorouter.com 245
677 One Organization 245
678 Microsoft 244
679 ITT 242
680 Citrix Systems Inc. 241
681 Gesellschaft fuer wissenschaftliche Datenverarbeitung 241
682 Pivotal Inc. 240
683 Smart Computer Systems Ltd 239
684 První certifikační autorita, a.s. 238
685 Valued Datadomain Customer 238
686 Argancity 237
687 Teradici 235
688 Websense 234
689 Universitaet Regensburg 234
690 RBC Hosting Center 234
691 POSCOPLANTEC 233
692 Zentrum fuer Informationsverarbeitung und Informationstechnik 232
693 Universitaet zu Koeln 232
694 PLANET IC GmbH 232
695 Virginia Tech 231
696 Techcom(TM) 230
697 Universitaet Duisburg-Essen 230
698 Axeda Corporation 230
699 Mulitable ERP-3T 230
700 Leibniz-Rechenzentrum 228
701 eDial 228
702 NSW Department of Education and Communities 227
703 juniper 227
704 IND 226
705 Universitaet Ulm 225
706 SILCA 225
707 Vidder 225
708 Active Voice, LLC 225
709 IPS Certification Authority s.l. 224
710 33135 224
711 EzSeed 223
712 RESOL - Elektronische Regelungen GmbH 223
713 AddTrust AB 222
714 Universitaet Bielefeld 222
715 Example Inc 222
716 Hellenic Academic and Research Institutions Cert. Authority 221
717 Universitaet Potsdam 221
718 ACCV 220
719 PROGICA 220
720 Disig a.s. 219
721 Japanese Government 218
722 Mojohost 218
723 Mirth Corporation 217
724 GIP-CPS 217
725 AGAVA Software Ltd. 217
726 Hatteras Networks 217
727 ProxySG: TemporaryDefaultCertificate 216
728 adidas AG 216
729 1A First Alternative 215
730 Global Technology Associates, Inc. 215
731 Blue Coat SGVA Series 215
732 LGPKI 214
733 Accenture 213
734 The Cloud Networks 212
735 Avocent Mergepoint Unity 211
736 Vaultive RnD ProxyNG 211
737 ALCATEL-LUCENT 211
738 $gcfg_account 210
739 nodivide 210
740 Self employed 210
741 Technische Universitaet Chemnitz 210
742 Bank of America 209
743 RAD Data Communications 209
744 ENERCON 209
745 Innovative Interfaces 209
746 A 208
747 Netasq 206
748 First Organization 205
749 Your Organization 204
750 MultiTech 204
751 eYou 203
752 France Telecom SA 203
753 APC 202
754 ACME inc. 201
755 CENTRAL SECURITY PATROLS CO., LTD. 201
756 Vodafone 200
757 ApplianSys Ltd. 200
758 T-Systems Enterprise Services GmbH 200
759 * 200
760 MSE 199
761 Exalt Communications 199
762 Pound Example Certificate 198
763 ACME 198
764 ATT 197
765 TNT 197
766 localdomain 197
767 Electronic Arts, Inc. 197
768 X 196
769 KHI 196
770 Legendsec 196
771 Wilmington Area School District 195
772 SomeOrganization1064 194
773 Fort-Funston 194
774 XinTong HuaAn Technologies Co., Ltd. 193
775 Hostpoint GmbH 193
776 MarketWare - Soluções para Mercados Digitais, Lda. 192
777 Fry Inc. 192
778 Bechtel Corporation 192
779 Uni-Konstanz 191
780 VPN 191
781 Duale Hochschule Baden-Wuerttemberg 191
782 Aristotle University of Thessaloniki 190
783 Latisys 190
784 Fachhochschule Braunschweig/Wolfenbuettel 189
785 WebSpace-Forum e.K. 189
786 OpenVAS Users United 188
787 Cegid 188
788 Atsumi Electric 188
789 WellnessFX 188
790 SiteGround LLC. 187
791 Universitaet Wuerzburg 187
792 Etisalat 186
793 Cisco ISA570W-K9 186
794 Company Name 185
795 OXEMIS 185
796 codenes 185
797 SAXA, Inc. 184
798 Baidu 184
799 Universitaet Jena 183
800 Universitaet Passau 183