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Key Information
Launch Year
2010
Shutdown Year
2011
Acquisition Price
Undisclosed
Peak Users
Unknown
Founders
- Moxie Marlinspike
- Stuart Anderson
Whisper Systems
Security
Acquired by TwitterEncrypted communication startup whose technology became the foundation for Signal's encryption protocol used by WhatsApp and others.
Key Features
- Encrypted calling (RedPhone)
- Encrypted texting (TextSecure)
- Open-source encryption