Audit firms that issue C5 attestations
The listed firms claim to offer C5 attestations on the internet. Alphabetical order.
This is not an official list.
| Firm | Country | Modified | Status |
|---|---|---|---|
| A-Lign Assurance | Global | ||
| ADVANTA | DE | 25.10.2025 | added |
| BDO Deutschland | DE | ||
| BFMT Audit | DE | 25.10.2025 | added |
| cert4Startups | DE | 25.10.2025 | added |
| Coalfire Controls | US | ||
| DCSO | DE | 25.10.2025 | added |
| Deloitte | DE | 10.12.2024 | updated |
| DHPG | DE | 25.10.2025 | added |
| Dr. Stückmann und Partner | DE | 2.2.2025 | added |
| EY | DE | ||
| FIDES Treuhand | DE | ||
| GKK Partners | DE | 27.3.2026 | added |
| HKKG | DE | ||
| IT AUDIT | DE | 3.12.2024 | added |
| KPMG | DE | ||
| Lazarus Alliance | US | ||
| Moss Adams | US | ||
| nbs partners | DE | 24.11.2024 | added |
| PwC Germany | DE | ||
| RSM Ebner Stolz | DE | 5.2.2026 | added |
| Rödl & Partner | DE | ||
| Schellman | US | ||
| Securance Audit Professionals | DE | 25.10.2025 | added |
| Simpliant | DE | ||
| TÜV Nord Group | DE | ||
| WP Koehler | DE | 6.2.2026 | added |