Silent Phone: secure mobile communications

Upgrade your device’s security with Silent Circle’s peer-to-peer encrypted application for secure voice and messaging. Silent Phone brings our enterprise-grade security features to iOS, Android and Silent OS mobile devices.

Perfect for teams of any size. Starting at $9.95 monthly per user.

Silent Phone

Scheduled burn functionality
Choose when messages get deleted on both ends


  • Protected from the moment you hit send
  • Encryption is performed on all devices that carry the application.
    Full burn functionality.
  • Cut out the man-in-the-middle
  • Short authentication strings safeguard against attacks.
  • Easy to use
  • No training required. Intuitive and familiar messaging app design.
    Direct access to Technical Support
  • VoIP calling
  • Encrypted calls with any iOS, Android or Silent OS device.
    No hardware or SIM card required.
  • Group messaging
  • Files, photos, video and voice shared securely within groups.
  • Conference calls
  • Up to six users all secured and identified.
  • Video calls
  • Up to 100MB file transfer
  • Scale up
  • Unlimited Secure Voice and Messaging between Silent Circle Members.
    Easily add accounts to accommodate any size team growth.

Unlimited peer to peer calling

Unlimited talk, text, video and conference calls between Silent Phone members

Secure messaging & file transfers

Completely secure messaging
Send and receive large files up to 100MB per message

Available on iOS and Android

Silent Phone is compatible with most iOS and Android mobile devices

Easy deployment & management

Simple deployment with no hardware, maintenance, or training required Manage from the web, active directory, or existing MDM

Don’t worry about security
Take care of business instead

Use the latest, user friendly voice and messaging app technology without exposure to man-in-the-middle attacks. Lock down your communication from end-to-end with military grade encryption security solutions. Our systems have no backdoor policy which makes access to information virtually impossible.

As user friendly as any commercially available messaging app, Silent Phone provides top grade enterprise security. Benefit from burn notice (1 min. – 90 day range), up to 100MB encrypted file sharing, read receipts and voice memo functions.

Family and friends can install the Silent Phone app to their devices too. This means all communication, both business and personal, remains secure at all times. Don’t worry about security anymore. Make it Silent instead.

Manage your enterprise mobile security with Silent Manager

Silent Manager is a user-friendly, web-based service that manages Silent Circle users, groups, plans, and devices in use across your enterprise with simple, zero-touch deployment. It can be used in conjunction with identity management systems to authorize a user’s account, or it can stand independently.

From a central dashboard, Silent Manager allows you to manage users, groups, and plans. Quick views and search options permit easy modifications for specific users or groups. New users can be added one at a time, or in batches by uploading a CSV file. Plus, administrators can manage outgoing call minutes to best fit each user or group.

Silent Manager provides a number of simple and easy-to-use features, all accessed through your Silent Circle account. Simply login by clicking the link at the top of the page and you’ll have access to your account.

Talk to anyone on any network with Silent World

Silent World calling extends the reach of Silent Phone to make or receive calls from standard mobiles or land lines.
With Silent World, calls have enhanced security over conventional calls. Your leg of the call is encrypted, keeping you safe from local eavesdropping threats.

Communicate privately to mobile and landline phones anywhere in the world.

contact sales

Comparison of Secure Mobile Communication Apps

Silent Phone Signal Telegram WhatsApp Wickr
Functionality Voice, video, text, group calls, file transfer up to 100mb Voice, video text, group chat, file transfer Voice, text group chats Voice, video, text, group chats, file transfer up to 105mb Voice, video, text, group chat, file transfer up to 5G
Technology Peer review, open source, end-to-end encryption Open source, end-to-end encryption Open API End-to-end encryption Open source, end-to-end encryption
Security User holds the keys User holds the keys Company holds the keys Company holds the keys User holds the keys
Identity Protection No native phone number required Requires native phone number Requires native phone number Requires native phone number No native phone number required
Contact Scraping No requirement, opt-in not stored on servers, uses hashing to protect privacy No requirement, opt-in not stored on servers, uses hashing to protect privacy Yes Yes No requirement, opt-in not stored on servers, uses hashing to protect privacy
Enterprise Management Yes No No No Yes
Ephemerality 1-minute to 90-day burn functionality & burn on demand Yes, limited capability No No 1-year max delete functionality on end user devices
Target Audience B2B / B2C B2C B2C B2C B2C / B2B
Company Jurisdiction USA USA Virgin Islands, UK USA USA