Communication Security Group (CSG) is a pioneer in providing secure instant messaging and VoIP solutions to government organizations and enterprises worldwide.

Our communication security platform - Cellcrypt - provides the highest level of protection against call and message interception, within a consumer-friendly app that can be used on virtually any off-the-shelf smartphone.


Military-grade, end-to-end encryption ensures the complete confidentiality and authenticity of voice calls and messages, even across the most vulnerable or hostile networks. With assured message delivery and minimal bandwidth utilization, Cellcrypt empowers organizational mobility and offers total privacy for your most sensitive communications.

CSG is headquartered in Washington DC and London with offices in Dubai, Düsseldorf, Centurion, and Hong Kong. The company is privately held and is backed by global investors who believe in our product, our vision, and our team.

Cellcrypt – Communication Security Group



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