Signal
FreePrivate messaging app with end-to-end encryption by default.
Communicationmessagingprivacyencryption
Added on December 30, 2025← Back to all tools
What does this tool do?
Signal is a privacy-focused, end-to-end encrypted messaging application that prioritizes user security and data protection. Unlike mainstream messaging platforms, Signal offers comprehensive communication features with a fundamental commitment to user privacy. The app provides secure text messaging, voice calls, video calls, and media sharing, all protected by the Signal Protocol - a gold standard in cryptographic messaging encryption.
AI analysis from Feb 18, 2026
Key Features
- End-to-end encrypted messaging
- Voice and video calling
- Encrypted group chats
- Custom sticker creation
- Self-destructing messages
- Cross-platform support
Use Cases
- 1Private personal communication
- 2Secure business conversations
- 3Journalist-source confidential messaging
- 4International communication without tracking
- 5Group coordination for privacy-sensitive teams
Pros & Cons
Advantages
- Military-grade end-to-end encryption
- Completely free with no advertising
- Open-source technology allowing independent security audits
Limitations
- Smaller user base compared to mainstream messaging apps
- Requires phone number for registration
- Limited enterprise/multi-device synchronization features
Pricing Details
Entirely free. No paid tiers or usage restrictions.
Who is this for?
Privacy-conscious individuals, journalists, activists, professionals handling sensitive communications, and anyone valuing digital privacy