| AccessGranted X GmbH | Physical Pentests, Social Engineering | 1-5 | 1-5 | Hof | |
| Cure53 | Web App & API, Cloud | 50 | 45 | Berlin | |
| DSecured | Web/API, Red Teaming (von extern) | 3 | 3 | Berlin | |
| greenhats® GmbH | Web, Code Audits | 20 | 6 | Weimar | |
| iteratec GmbH | (Web-)Applikationen & Cloud | 450 | 5 | München | |
| Lutra Security GmbH | Red Teaming, Web-Applikationen | 4 | 4 | München | |
| MindBytes GmbH | Red Teaming, Infrastrukturen | 6 | 6 | Stuttgart | |
| mioso - IT Solutions GmbH & Co. KG | Pentesting und OT/IT | 30 | 5 | Hamburg | |
| Neodyme AG | Active Directory, Application Security | 20-30 | 9 | München | |
| Schutzpunkt GmbH | Infrastruktur/AD, Red Teaming | 2 | 1 | Neumarkt in der Oberpfalz | |
| secuvera GmbH | AD, Infrastruktur, Web | 50 | 20-25 | Gäufelden | |
| Wavestone AG | Web, Infrastrukturen | 5500 | 115 | München | |
| AWARE7 GmbH | Informationssicherheitsberatung | 50 | 15 | Gelsenkirchen | |
| AwareTec | Tabletop Exercises, Red Teaming | 10 | 4 | Köln | |
| BreakinLabs GmbH | Active Directory, Infrastruktur und Web | 5 | 4 | Regensburg | |
| CANCOM SE | Pentests, Red & Purple Teaming | 5700 | 25 | München | |
| carmasec GmbH & Co. KG | Web, Infrastruktur | 40-50 | 4 | Essen | |
| CCVOSSEL GmbH | Red Teaming, AD Infrastruktur | 60-70 | 5-8 | Berlin | |
| CERTAINITY GmbH | Infrastruktur, Web/Mobile App | 28 | 5 | Neu-Isenburg | |
| ETAS GmbH | Embedded, Enterprises | 3000 | 18-20 | Stuttgart | |
| Exploit Labs GmbH | Red Teaming, Training | 12 | 10 | Eschborn | |
| KALWEIT ITS GmbH | Innentätertests, Red Teaming | 10-15 | 10-15 | Hamburg | |
| Laokoon SecurITy GmbH | Pentesting, Red Teaming | 15-20 | 13-18 | Bonn | |
| Lednerb IT-Security GmbH | Web, Infrastrukturen | 2 | 1 | Flensburg | |
| Lucidra Security GmbH | Infrastrukturen, Red Teaming | 2 | 2 | Seeon | |
| netzsicher GmbH | Social Engineering, AD | 3 | 2 | Lünen | |
| NSIDE ATTACK LOGIC GmbH | Pentests, Red & Purple Teaming | 25 | 20 | München | |
| Pentagrid GmbH | Applikationen und Infrastruktur | 4 | 4 | Berlin | |
| Possehl Secure GmbH | AD, Web-App | 30 | 5 | Köln | |
| SCHUTZWERK GmbH | Penetrationstests, Red Teaming | 40 | 30 | Ulm | |
| Sodu Secure GmbH | KMU Pentests, Infrastruktur/AD | 6 | 4 | Berlin | |
| Trovent Security GmbH | Web Applikationen, AD Infrastrukturen | 25 | 5-10 | Bochum | |
| TÜV TRUST IT GmbH | Web, Infrastrukturen | 80 | 10-20 | Köln | |
| yatesh | Rich/Fat Client, Web | 1-3 | 1-3 | Frankfurt am Main | |
| Yekta IT GmbH | IT-/OT-Pentests, KRITIS | 15-20 | 5-10 | Dortmund | |
| zentrust partners GmbH | Penetrationstests, Red Teaming | 5-10 | 5-10 | Wiesbaden | |
| whitelisthackers GmbH | | 16 | 8 | Bamberg | |
| 360 Digitale Transformation GmbH | | | | Ilmmünster | |
| 8com GmbH & Co. KG | | | | Neustadt an der Weinstraße | |
| Allgeier CyRis GmbH | | | | Hamburg | |
| Antago GmbH | | | | Bensheim | |
| binsec GmbH | | | | Frankfurt am Main | |
| cirosec GmbH | | | | Heilbronn | |
| Claranet GmbH | | | | Frankfurt am Main | |
| Clausohm-Software GmbH | | | | Neverin | |
| Compass Security Deutschland GmbH | | | | Berlin | |
| Devoteam GmbH | | | | Frankfurt am Main | |
| Dietzel & Company GmbH | | | | Eschborn | |
| DigiFors GmbH | | | | Leipzig | |
| Fraunhofer-Institut für Sichere Informationstechnologie | | | | Darmstadt | |
| GAI NetConsult GmbH | | | | Berlin | |
| imbus AG | | | | Möhrendorf | |
| Insentis GmbH | | | | Geisenheim | |
| Inside Security IT Consulting GmbH | | | | Stuttgart | |
| mgm security partners GmbH | | | | München | |
| mioso – IT Solutions GmbH & Co. KG | | | | Hamburg | |
| MOGWAI LABS GmbH | | | | Neu-Ulm | |
| n-komm GmbH | | | | Karlsruhe | |
| neam IT-Services GmbH | | | | Paderborn | |
| NEXGAP GmbH | | | | Frankfurt am Main | |
| NTT DATA Deutschland SE | | | | München | |
| NVISO | | | | Frankfurt am Main | |
| OHB Digital Services GmbH | | | | Bremen | |
| Paradigma-IT | | | | Darmstadt | |
| Pentest Factory GmbH | | | | Geldern | |
| pentest24 | Bindig Media GmbH | | | | Chemnitz | |
| ProSec GmbH | | | | Polch | |
| Qualitest Germany GmbH | | | | Köln | |
| r-tec IT Security GmbH | | | | Wuppertal | |
| RedTeam Pentesting GmbH | | | | Aachen | |
| SEC Consult Deutschland Unternehmensberatung GmbH | | | | Berlin | |
| SRC Security Research & Consulting GmbH | | | | Bonn | |
| SSE – Secure Systems Engineering GmbH | | | | Berlin | |
| SYSS GMBH | | | | Tübingen | |
| TÜV SÜD AG | | | | München | |
| usd AG | | | | Neu-Isenburg | |
| Ventum Consulting GmbH & Co. KG | | | | München | |
