Privacy evaluation of messaging applications. Analyzed by Data Champion® for encryption, metadata protection, and data collection practices.
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Signal Foundation

Threema GmbH

Telegram FZ-LLC
| Risk Category | Level | Description |
|---|---|---|
| Metadata Collection | MEDIUM | Most apps collect contact lists and usage patterns |
| End-to-End Encryption | LOW | Top apps use strong E2EE by default |
| Cloud Backups | HIGH | Unencrypted backups expose message history |
| Third-Party Sharing | MEDIUM | Some apps share data with parent companies |
| Phone Number Requirement | MEDIUM | Most require phone verification linking identity |
| Message Retention | LOW | Leading apps use ephemeral messaging options |
| Product | Overall | Data Collection | Security | User Control | Transparency | Data Usage | Price |
|---|---|---|---|---|---|---|---|
![]() Signal Signal Foundation | 94 | 98 | 96 | 92 | 94 | 96 | Free |
![]() Threema Threema GmbH | 91 | 96 | 94 | 90 | 88 | 94 | $4.99 one-time |
![]() Telegram Telegram FZ-LLC | 78 | 72 | 82 | 80 | 76 | 74 | Free |
![]() iMessage Apple Inc. | 75 | 76 | 88 | 70 | 72 | 74 | Free (iOS only) |
![]() WhatsApp Meta Platforms | 68 | 58 | 84 | 64 | 68 | 60 | Free |
Google Messages Google LLC | 62 | 52 | 76 | 58 | 64 | 56 | Free |