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ICSL – Secure Communications
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Silentel as-a-Service Premium — available immediately Silentel Hosted / Cloud Silentel On-Premise Custom Compare all deployment models · Features & Functions
What we do
Secure Voice, Messaging & Data Communications Deployment, Setup & Managed Environments Crisis Backup as-a-Service Live Drone Streaming in the Messenger Quantum-Resistant Communications Custom Devices — Bespoke Endpoints Testing & Evaluation Training & Support
Who is it for?
Executive & VIP Government & Military Critical Infrastructure & Businesses Communicate Anonymously and Securely Crisis Communications & Backup
Why ICSL?
Neutrality for Our Customers We examine the details ICSL — since 1995 Discretion & Principles Approvals & Clearances Solutions that work
ICSL Consulting ↗
Who is it for?

Highly secure communications.
For those who need it to count.

ICSL has protected the voice and data communications of governments, the military, critical infrastructure operators, executives, crisis teams and VIPs for more than 20 years. Discover which solution fits your requirements.

70%Government & Public-Sector Customers
30+Years in telecommunications · Understanding how networks work.
20+Years Dedicated Exclusively to COMSEC
20+Countries with ICSL
24hUntil the first response

Our Audiences

Every requirement is different — that is why we advise each customer individually and without conflicts of interest.

Government & Military

Ministries · Armed Forces · Intelligence Services · Diplomatic Service

  • NATO-approved solutions for classified use up to Top Secret
  • Thousands of user accounts centrally manageable by you
  • Post-quantum encryption as standard
  • Air-gapped operation and national certification possible
  • Discreet references available
NATO Approval Classified
Government & military details →

Critical Infrastructure

Energy Utilities · Financial Institutions · Emergency Services · Industrial Businesses

  • Operational continuity even during an ongoing cyberattack
  • Leadership communications independent of corporate IT
  • Rapid activation as a backup channel
  • Beyond mainstream tools
  • Suitable for NIS2 and critical infrastructure requirements
NIS2 KRITIS Business Continuity
Critical infrastructure details →

Executive & VIP

C-Level · Board Members · Politicians · People with Confidentiality Needs

  • Fully supported by ICSL — no in-house IT team required
  • As easy to use as any messenger, yet highly secure
  • Available anonymously — no entry in a legal notice
  • No data traces, no persistent data on the device, resistant to forensic analysis
  • For individual and group requirements
Discreet Available Anonymously Active Immediately
Executive & VIP details →

Unsure what fits your needs?

ICSL advises you confidentially and without obligation — independent of manufacturer interests.