Silent Circle
Track on RadarEncrypted mobile voice, messaging, and device security for enterprises.
- Total raised
- $130M
- Employees
- —
- Founded
- 2012
- Momentum
- —
Data updated August 2026
About
About Silent Circle
At a glance
Silent Circle is a cybersecurity company specializing in Email & Messaging Security, founded in 2012 and headquartered in Geneva, Switzerland. It has raised $130M in total funding and is privately held.
Silent Circle is a mobile security company that develops encrypted communications products for enterprise and consumer markets. Its core offerings center on secure voice calls, messaging, and mobile device solutions designed to protect communications from interception, surveillance, and data exfiltration. The company is known for Silent Phone, a secure calling and messaging application available on iOS and Android, which provides end-to-end encrypted voice and text communications. Silent Circle also developed the Blackphone, a privacy-focused Android smartphone running PrivatOS, a hardened version of Android built to minimize attack surface and protect user data. The Blackphone was developed under SGP Technologies, a joint venture associated with Silent Circle. Silent Circle targets enterprise customers, government agencies, and security-conscious individuals who require protection against threats such as cellular interception (including SS7 vulnerabilities), man-in-the-middle attacks on Wi-Fi networks, and nation-state surveillance. The company positions its products for use cases including BYOD (Bring Your Own Device) enterprise deployments, international travel, and regulated industries requiring secure communications. The platform includes a management dashboard for enterprise administrators, enabling centralized control over secure communications deployments. Silent Circle has also published guidance on mobile security best practices, covering topics such as VPN usage, mobile device management (MDM), and risks associated with unsecured networks and foreign cellular infrastructure.
Momentum
How Silent Circle is trending
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Valuation
What Silent Circle is worth
Estimated valuation
Products
Silent Circle's products
Funding
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Public markets
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Privately held
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Headcount
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Tech stack
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Full profile
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FAQ
Frequently asked questions about Silent Circle
When was Silent Circle founded?▾
Silent Circle was founded in 2012.
Where is Silent Circle headquartered?▾
Silent Circle is headquartered in Geneva, Switzerland.
How much funding has Silent Circle raised?▾
Silent Circle has raised a total of $130M in total funding.
Is Silent Circle public or private?▾
Silent Circle is a privately-held company.
What does Silent Circle do?▾
Silent Circle is a mobile security company that develops encrypted communications products for enterprise and consumer markets. Its core offerings center on secure voice calls, messaging, and mobile device solutions designed to protect communications from interception, surveillance, and data exfiltr…