Signal vs Threema
A detailed comparison to help you choose between Signal and Threema.
Signal Private messenger | Threema Swiss messenger with no phone number or email required. | |
|---|---|---|
| Rating | 4.8 (45000 reviews) | 4.4 (330 reviews) |
| Pricing Model | free | paid |
| Starting Price | Free | From $4.99/mo |
| Best For | Most secure messaging | Best for users seeking privacy and security tools |
| Free Tier | ||
| API Access | ||
| Team Features | ||
| Open Source | ||
| Tags | — | — |
Signal
Pros
- + Free app with optional donations
- + Publicly documented Signal Protocol specs
- + Minimal retained data in subpoena examples
- + Usernames reduce phone-number sharing
- + Open-source core code on GitHub
- + End-to-end encrypted group calling design
Cons
- - Phone number required for registration
- - Some anti-spam server components reportedly closed
- - Backup recovery key adds user responsibility
- - No official performance benchmarks published
Threema
Pros
- + No phone number required for sign-up
- + Ibex protocol adds forward secrecy for chats
- + E2EE covers calls, chats, and files
- + Encrypts group metadata like names and members
- + Open-source apps with public repositories
- + Regular third-party audits listed by Threema
Cons
- - Server-side code isn’t open source
- - No multi-mobile-device sync for one Threema ID
- - Private app requires upfront payment
- - Business tiers billed annually per user
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