Armour Mobile vs Silent Circle Silent Phone: Side-by-Side Comparison (2026)

Armour Mobile: Secure mobile comms platform for defence, approved to NATO Restricted/OFFICIAL SENSITIVE. built by Armour Communications. Core capabilities include End-to-end encryption of data in-transit and at rest, Secure messaging and voice calls on iOS, Android, and Windows 10, Approved for OFFICIAL SENSITIVE and NATO Restricted classifications..

Silent Circle Silent Phone: Encrypted voice, video, messaging & file transfer app for Android & iOS. built by Silent Circle. Core capabilities include End-to-end encrypted voice calls, End-to-end encrypted video calls, Secure HD conference calling..

Both serve the Mobile Data Protection market but differ in approach, feature depth, and target audience.

Armour Mobile differentiates with End-to-end encryption of data in-transit and at rest, Secure messaging and voice calls on iOS, Android, and Windows 10, Approved for OFFICIAL SENSITIVE and NATO Restricted classifications. Silent Circle Silent Phone differentiates with End-to-end encrypted voice calls, End-to-end encrypted video calls, Secure HD conference calling.

Armour Mobile is developed by Armour Communications. Silent Circle Silent Phone is developed by Silent Circle. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Armour Mobile and Silent Circle Silent Phone serve similar Mobile Data Protection use cases: both are Mobile Data Protection tools. Review the feature comparison above to determine which fits your requirements.