Silent Circle

Brief Overview

Silent Circle provides encrypted communications for mobile, video, and voice services.


Silent Circle, US Headquarters
4210 Fairfax Corner West Avenue
Suite 215
Fairfax, VA 22033
Tel: (202) 499 - 6427

Silent Circle
Le Grand-Saconnex, Switzerland
Tel: +41 (0) 22 518 26 02


Mike Janke, Founder and Chairman of Silent Circle, is a former Navy SEAL.
Gregg Smith, CEO of Silent Circle, was previously CEO of Optio Labs.


Mike Janke, Phil Zimmerman, Jon Callas, and Vincent Moscaritolo co-founded Silent Circle in 2011 as a secure version of Skype. Dutch telecom company KPN partnered with the company in 2014 to offer its products. It has an established base in the Netherlands, Belgium, Germany, Australia, and New Zealand. A Swiss startup called Blackphone launched a Silent Circle-based product in 2014. Silent Circle announced that it would no longer provide secure email in 2013.

Key Competitors

KoolSpan, Cellcrypt

Products and Services

Silent Circle provides encryption support for mobile, voice, and video services that prevent man-in-the-middle collection or government intervention-based collection. The Silent Circle product suite includes the following:

• Silent Circle Mobile – Includes Silent Phone ad Silent Text, which provides encrypted voice and text over 3G, 4G, and WiFi, with the ability to provide secure conferencing for up to six people. The products are available as apps for iOS and Android.
• Silent Circle Enterprise – Includes a management console to manage user licenses.
• Silent Circle Desktop – Includes a desktop application with HD-quality calling (formerly called Silent Eyes).
• Out-Circle Access – Encrypts half the communication in-circle to Silent Circle servers and then completes the handoff to the PSTN.