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CertDB
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
401 SECURE NET 647
402 Apple Inc. 640
403 Technische Universitaet Darmstadt 631
404 Technische Universitaet Dresden 630
405 NTT Software 628
406 NetScaler Inc. 628
407 Eltex Ent 624
408 Virginia Polytechnic Institute and State University 622
409 Any Organization 615
410 Blue Coat Systems 615
411 Home server 606
412 Vivotek.Inc 602
413 Aastra 599
414 I.T. Telecom 596
415 Open-E 593
416 Self-Signed 591
417 Innominate Security Technologies AG 590
418 Riverbed Technology, Inc. 588
419 MyCompany LLC 585
420 ASUSTek 585
421 OpenWebif 582
422 Temp Certificate! 582
423 Viprinet GmbH 580
424 org 579
425 Entrust.net 575
426 GPLHost 573
427 ips Certification Authority 573
428 Dotname Korea Corp. 570
429 localhost.localdomain 567
430 Liberty Mutual Group 567
431 IBM 563
432 TrustSign Certificadora Digital 562
433 Kaleidescape, Inc. 557
434 hw 544
435 Hostpoint AG 542
436 Digital Alert Systems LLC 542
437 AXIGEN Mail Server 536
438 Duke University 533
439 Ludwig-Maximilians-Universitaet Muenchen 533
440 Stackato 533
441 Command 530
442 UDI 530
443 Academie de Grenoble 529
444 Nusoft System Inc. 529
445 Sendio, Inc. 529
446 IZENPE S.A. 525
447 Enterprise Mobility 523
448 Nusoft System, Ltd 521
449 Government of the Province of British Columbia 515
450 FNMT 515
451 Volusion, Inc. 513
452 PortaOne, Inc. 507
453 SECOM Trust.net 504
454 FreeBit Co.,Ltd. 503
455 KONAI 503
456 Migros 499
457 Atos Worldline 497
458 Google Trust Services 495
459 SAGEM 492
460 UniCredit S.p.A. 491
461 CNRS 490
462 Plex, Inc. 487
463 innovaphone 485
464 AS Sertifitseerimiskeskus 484
465 Cyclades Corporation 483
466 VeriSign Japan K.K. 482
467 Sangfor Ltd 480
468 owncloud 473
469 Ruhr-Universitaet Bochum 471
470 Oracle Corporation 470
471 FNMT-RCM 468
472 seedbox.io 467
473 Universitaet Paderborn 465
474 SAP America 465
475 Universitaet Hamburg 462
476 IdenTrust 461
477 [CN] 461
478 VoLANs 455
479 Enstratius Inc. 453
480 Yandex LLC 453
481 WinsTechnet 451
482 Networks & More! 449
483 iboss Network Security 447
484 manitobaoffice 447
485 AutoGenerated 445
486 C90-TemporaryTestCertificate 445
487 3Com 444
488 Freie Universitaet Berlin 444
489 SCEE 444
490 SmartSynch, Inc. 443
491 Dreamcommerce S.A. 442
492 ONELAN Ltd 441
493 Linkbynet SA 439
494 Schmid Telecom Ind Pvt. Ltd 439
495 Sourcefire, Inc. 438
496 My Company, Inc. 436
497 IceWarp Ltd 436
498 Digi International Inc 434
499 Citrix 434
500 ORACLE 432
501 SSL Server 427
502 WebSpace-Forum, Thomas Wendt 427
503 Weezo 424
504 Streisand 422
505 Deutsches Elektronen-Synchrotron DESY 420
506 ABB 415
507 Example Organization 415
508 Server 413
509 34SP.com 411
510 Cisco ISA550-K9 408
511 Cisco Small Business 406
512 Universitaet Erlangen-Nuernberg 405
513 Getronics Nederland BV 405
514 SomeCompany 404
515 Temp Hosting 403
516 WatchGuard_Technologies 403
517 WordPress-to-Cloud 402
518 GlobalAirNet AG 399
519 OptimumSSL CA 397
520 Computer Programs and Systems, Inc. 396
521 PolicyManager 395
522 Zimbra Collaboration Suite 394
523 Cisco ISA550W-K9 392
524 Universitaet des Saarlandes 391
525 cisco 390
526 Liftoff Software 388
527 OVH SAS 388
528 Secure Business Services, Inc. 385
529 NEC BIGLOBE Ltd. 383
530 Atos Origin 382
531 Eaton Corporation 376
532 LuxTrust S.A. 374
533 SolusVM Slave 368
534 openstack 366
535 Packeteer 365
536 Planeetta Internet Oy 361
537 N2W Software 359
538 Your company 357
539 Technische Universitaet Berlin 357
540 SolutionInc Limited 357
541 Universitaet Heidelberg 354
542 ICEFLOW 354
543 VMware AutoDeploy 354
544 KONICA MINOLTA 353
545 RSA Security LLC 353
546 O 352
547 My Company Name LTD. 351
548 O2Micro 351
549 eRAD-Imagemedical 349
550 Harmonic Inc. 345
551 Sonera 343
552 ADP, Inc. 342
553 Thawte Consulting (Pty) Ltd. 341
554 Paychex Inc. 341
555 QuoVadis Trustlink BVBA 340
556 Technische Universitaet Braunschweig 339
557 Juniper Networks, Inc. 338
558 CONSORCI ADMINISTRACIO OBERTA DE CATALUNYA 337
559 LAN Airlines 336
560 The University of Edinburgh 334
561 Cybertrust 331
562 LiquidNet Ltd. 331
563 Postecom S.p.A. 328
564 Aladdin Knowledge Systems Ltd. 327
565 GitHub Automatic Self Signed Certificate 326
566 AMX Corporation 326
567 CEA 325
568 Česká pošta, s.p. [IČ 47114983] 325
569 Universitaet Muenster 324
570 NOC-PS 323
571 Ecessa Corp. 322
572 Private_CA 322
573 Placeholder 322
574 Magento 321
575 Universitaet Bonn 321
576 Ubiquiti Networks Inc. 320
577 CrossCert 320
578 Ubuntu Contrib 320
579 SomeOrg 317
580 Coyote Point Systems 316
581 ZTE Ltd. 316
582 Datalog Technology 314
583 Applied Card Technologies Ltd 314
584 Askey 313
585 urmet 313
586 Leibniz Universitaet Hannover 312
587 BookRenter.com Staging CA 311
588 Betrusted Japan Co., Ltd. 310
589 Inc. 309
590 Self 309
591 Cbeyond 309
592 WoSign eCommerce Services Limited 309
593 Universitaet Leipzig 308
594 OpenShift Enterprise default 307
595 Deutsche Bank AG 305
596 NQ 305
597 Virtual Access 303
598 XiPS 300
599 Viola Systems Ltd. 300
600 The Demo Vendor 300