Signal
VS
WhatsApp
VS
Telegram
Privacy & Anonymity
End-to-End Encryption
Yes, by default for all communications.
Yes, but requires setting adjustments.
No, optional for “Secret Chats”.
Data Retention
No data retention policy.
Stores some metadata.
Stores messages until they are read or deleted.
Security Features
Two-Factor Authentication
Available.
Available and encouraged.
Available but not as highlighted.
Open Source
Yes, fully open source.
Partially closed source.
Partially open source.
Usability & Compatibility
Cross-Platform Availability
Available on all major platforms.
Available on all major platforms.
Available on all major platforms but desktop experience is limited.
User Interface
Simple and user-friendly.
Intuitive and feature-rich.
Customizable but can be overwhelming for new users.
Cost & Use Cases
Cost
Free with no ads.
Free but ad-supported in some regions.
Free with no ads.
Best Use Case
Ideal for privacy-focused users.
Best for general user base with community features.
Great for large public channels and groups.
