The quietest form
of sovereignty.
A solution for government use — privately operated for you. Purchased anonymously, active the same day, managed down to the last detail. You do nothing. Except talk.
Silentel as-a-Service Premium provides private access to technology otherwise reserved for states — operated by ICSL in Vienna. Serving discretion since 1995.
Your name remains
your own.
Available anonymously, with anonymous payment on request. Discreet, with minimal data collection: no reference lists, no disclosure of customer names.
The technology states use to discuss classified matters.
NATO-approved. Post-quantum-capable architecture with security for the highest protection requirements. Government-grade technology, beyond a store app: privately operated for you in ISO-27001 data centres in Vienna.
Once spoken,
your words are yours again.
No permanent data storage on the device — significantly reducing the forensic attack surface. And on the server: no access to your data, even for ICSL server administrators.
You talk.
We take care of everything else.
Fully managed from Vienna: setup, operations, updates and monitoring around the clock. Plus a dedicated contact who knows you. No call centre. No ticketing system. No work for you.
Everything from one provider — ICSL operates, you communicate.
No servers, no IT infrastructure, no setup effort. ICSL has used Silentel since 2013 and operates the platform daily for governments and security agencies.
Active the Same Day
Set up access and start communicating — on the day of your enquiry.
End-to-End Encrypted
Military-grade encryption. No third-party access — not even for ICSL.
24/7 Operations by ICSL
Monitoring, updates and operations handled entirely by ICSL
Available Anonymously
No real-name registration required. Discretion as standard, including an anonymous payment option.
iOS & Android
Native apps for all current platforms. No special devices required.
Personal ICSL Support
Direct access to your ICSL contact — no call centre
What You Receive
Silentel as-a-Service Premium is our most comprehensive managed service — everything included, nothing to set up yourself.
- Silentel Secure Voice — encrypted voice calls
- Silentel Secure Messaging — encrypted text messages & groups
- Silentel Secure Conference — encrypted group calls
- Choose conference mode or push-to-talk (PTT) — 200 or more participants also possible
- Encrypted file transfer (documents, images)
- Video calls and video conferences with extensive functionality
- Administration interface for user management
- Onboarding support from ICSL technical specialists
- Ongoing security updates & patch management
- SLA-backed operations
- GDPR-compliant infrastructure operations in ISO 27001-certified data centres
Silentel as-a-Service Premium
- ✓ Servers in the EU · ISO 27001 data centre in Vienna
- ✓ A fully fledged government solution for classified information
- ✓ No access to your data — even for ICSL server administrators
- ✓ No synchronisation outside the system
- ✓ Full administrative control over your users
- ✓ No external accounts required
- ✓ NATO-compatible security level
- ✓ Central administration available
- ✓ Independence from third-party accounts
- ✓ Certification — enabling government use too
Who Is Silentel as-a-Service Premium Ideal For?
Anyone who needs highly secure communications immediately, without building their own IT infrastructure.
Senior Leaders & Decision-Makers
CEOs, ministers, agency heads: maximum security with minimal effort. No IT team required.
Security Teams & Executive Protection
Operational coordination, situation briefings, VIP communications — discreet and encrypted.
Crisis & Emergency Communications
An immediately activatable backup alongside primary communications. Already configured when an emergency occurs.
Small and Medium-Sized Teams
For organisations needing security without an in-house IT department — simple user management included.
Professional Practices & Advisers
Lawyers, tax advisers and management consultants handling sensitive client discussions — complete confidentiality.
International Organisations
Secure cross-border communications — independent of the other party's national interception laws.
PEOPLE · VIPs & Everyone
with something important to say that is not intended for everyone.
Active in 3 Steps
No months-long rollout. No IT project. Active communications within hours.
Confidential Conversation, Online Enquiry or Direct Order
Briefly describe your needs. ICSL assesses the appropriate configuration and user count. Communications with ICSL are always discreet — no customer data are disclosed. You receive an offer as a pro forma invoice. If it meets your requirements, you can pay immediately into our account or pay anonymously. Once payment is received, a tenant is created for you.
Setup by ICSL
ICSL sets up your instance, creates user accounts and configures the administration interface. You receive access credentials and a brief introduction.
Ready to use immediately
Install the app, enter your credentials — done. From that moment, every conversation is end-to-end encrypted. ICSL handles operations and updates on an ongoing basis.
Get Started Today
Enquiries are handled discreetly. ICSL does not disclose customer names.