Secondary Storage • Data-Sovereign AI • Made in Europe
Backup & recovery. Long-term archiving. AI-powered knowledge management.
Our solutions for local data storage and AI have been designed from the outset to ensure maximum data privacy and the highest level of data security, in order to protect your sensitive data from loss, tampering and misuse.

Protecting data in uncertain times
Data protection. Data security. Data sovereignty. Featuring Zero Loss Storage and off-cloud AI from Germany.
Choose a solid foundation for your data strategy. With products "made in Europe".
| Features | Silent Bricks | Silent Cubes | Silent AI |
|---|---|---|---|
| Security | |||
| Immutability | ✓ S3 Object Lock, Continuous Snapshots | ✓ Hardware WORM | – |
| True Air Gap | ✓ Physical (SB Pro) / electrolytic (SB Max Air) | – | – |
| Ransomware protection | ✓ core function / Immutable Backups | ~ Indirectly via WORM sealing | ~ No cloud attack vectors |
| EU data sovereignty | ✓ 100 % local, made in Germany | ✓ 100 % local, made in Germany | ✓ Off-Cloud, 100 % local, made in Germany |
| Compliance & Archiving | |||
| Compliant Archiving | – | ✓ Core function with certification | – |
| GDPR compliance | ✓ Full control over data | ✓ Certified | ✓ Full control over your data, free from the US CLOUD Act and FISA 702 |
| NIS2 / DORA | ✓ Backup & Recovery | ✓ Long-term archiving, records | ~ Data processing under national jurisdiction |
| Performance & Technology | |||
| NVMe performance | ✓ Up to 6 GB/s with SB Pro | — (Focus on capacity) | ✓ Up to 6 GB/s with Silent AI Vault |
| Scalability | ✓ Internal storage up to 768 TB (SB Pro), external storage up to over 7 petabytes (SB Max Air) | ✓ Modular, several petabytes | ✓ Several thousand requests per hour per appliance |
| S3 object storage | ✓ Single-Node, Multi-Node-Performance | – not at present | – |
| VTL / Tape emulation | ✓ Full VTL, up to over 7 PB | – | – |
| AI & Data Transparency | |||
| AI assistant for staff | – | – | ✓ Core application with Workplace connectors |
| Document analysis | – | – | ✓ Local RAG workflows |
| Vollständig On-Premise | ✓ | ✓ | ✓ Off-Cloud |
✓ Full support · ~ Partial / indirect · — Not provided
Typical use cases
Modular & flexible storage system for backup & recovery and large VTL archives.
With the Silent Brick System, you’re on the safe side. and an air gap protect your backup data from the consequences of a cyber attack. The ultra-fast NVMe architecture ensures short backup windows and fast restores.
As a VTL (virtual tape library), the Silent Brick System is the superior alternative to outdated tape archives. Random access, energy-efficient modular architecture and low-maintenance operation help you minimise effort and costs.
Immutable Storage
Immutable storage refers to storage technologies that protect stored data from subsequent alteration or deletion — where the decisive difference lies in whether this protection is enforced at the hardware level (cannot be circumvented) or at the software level (can be circumvented by administrators with sufficient rights).

The standard for (audit-proof) archiving with hardware sealing.
For over 17 years, Silent Cubes have proven themselves in the healthcare sector, public institutions and government bodies, and in industry as a highly secure and legally compliant data storage solution. Thousands of customers rely on the combination of maximum security through hardware sealing with true (write once, read many), flexible scalability up to petabytes, and minimal administration and maintenance requirements. For all data that must not be lost under any circumstances.
WORM
WORM (Write Once, Read Many) refers to a storage principle in which data is written once and can technically no longer be altered or deleted — in hardware WORM, this immutability is a physical property of the storage controller, independent of software, operating system or user privileges.
WORM
WORM (Write Once, Read Many) refers to a storage principle in which data is written once and can technically no longer be altered or deleted — in hardware WORM, this immutability is a physical property of the storage controller, independent of software, operating system or user privileges.

Work with AI and your data without being tied to the cloud and with full control over your data.
Whether you’re a team, department, public authority or business: with Silent AI, you can use your sensitive data from your workplace applications locally and without the risks associated with the cloud. Our secure architecture uses language models solely to interpret your questions and provide answers. The relevant information is retrieved independently via RAG from local databases. This respects the existing permissions structure and optimises access through the use of individual data sets.

