Silent Circle

Silent Circle is an encrypted communications firm that provides multi-platform secure communication services for mobile devices and desktop.

Silent Circle enables enterprises to regain privacy with their employees, partners and customers in a mobile first world where privacy is nearly extinct.

Silent Circle was co-founded in October 2011 by Mike Janke, former Navy SEAL and best-selling author, and Phil Zimmermann. The company is headquartered in Le Grand-Saconnex, Switzerland with an office in Columbia, MD, USA. 

Silent Circle's mission is to be the world’s most trusted secure communications company by delivering privacy without compromise. Silent Circle Enterprise Mobile Privacy Platform delivers flexible, modular, no-touch deployment with zero maintenance, hardware or additional manpower required. If trusted communications matter, trust your security to Silent Circle.

Silent Circle operates under a subscription business model. The encryption part of the software used is free software/open source and peer-reviewed. For the remaining parts of Silent Phone and Silent Text, the source code is available on GitHub, but under proprietary software licenses.


Silent Circle is a recognized innovator in enterprise privacy delivered through a revolutionary platform of devices, software and services.


Silent Circle's investors include Santander Bank, Ross Perot, & Cain Capital. The company has raised a total of $130M in funding to-date. Silent Circle has also acquired SGP Technologies SA & Kesala to date.



  • Year founded: 2011
  • Funding Info: $130M in 3 Funding Rounds (Last Funding Type: Series C)- Silent Circle has also acquired SGP Technologies SA & Kesala to date!
  • Yearly Revenue: $5M-$10M (2018)
  • Employee Size: 51-200
  • Business Valuation: NA
  • City/Town: Le Grand-Saconnex
  • State: Geneva
  • Country: Switzerland
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