Threema
ActiveOverview
Threema is a cross-platform encrypted instant messaging application that supports text, voice, video calls, file sharing, and group chats without requiring phone numbers or email addresses for registration; users receive a randomly generated Threema ID instead.123 It emphasizes privacy through end-to-end encryption, zero-knowledge architecture, servers in Switzerland, and no data collection or trackers, targeting users seeking anonymous and secure communication.1236
Key Features
- End-to-end encryption - All communications including chats, calls, and files are end-to-end encrypted with no data trail left behind.
- Anonymous registration - Uses randomly generated Threema ID instead of phone number or email address.
- Voice and video calls - End-to-end encrypted one-to-one and group calls with high quality.
- Group chats - Supports groups up to 256 members managed decentrally; includes polls.
- File sharing - Send files up to 50MB in various formats like PDF, GIF, MP3.
- Desktop and web clients - Full access to chat history, contacts, and media on PC.
- Message editing and deletion - Edit sent messages or delete for all chat partners.
- QR code verification - Verify contact identities by scanning QR codes.
Pricing
| Plan | Price | Includes |
|---|---|---|
| Standard | One-time purchase via app stores | Full access to all features on mobile apps. |
| Threema Web | Free with mobile app | Web client access requiring QR code scan from mobile. |
| Desktop App | One-time purchase | Standalone desktop client for Windows, macOS, Linux. |
Platforms & Requirements
Available on iOS, Android, Windows, macOS, Linux via desktop app, and web client; desktop and web require initial setup with mobile app via QR code scan.236 No specific minimum requirements detailed; files limited to 50MB across platforms.1
Integrations & Ecosystem
- Threema ID for anonymous identification
- QR code scanning for contact verification
- Export chat data via app
- JSON inventory data retrieval from *MY3DATA
- Push tokens for multiple devices (HMS, Apple, FCM)
- Desktop sync with full chat history
Alternatives
| App | Difference |
|---|---|
| Signal | Requires phone number for registration; free with donations. |
| Requires phone number; owned by Meta with data collection. | |
| Telegram | Optional end-to-end encryption; requires phone number. |
| Wire | Freemium model; requires email or phone. |
Reputation
Threema is recognized for strong privacy features like no phone/email requirement, end-to-end encryption, Swiss servers, and open-source code with regular audits, appealing to privacy-conscious users.123 Criticisms include its paid model limiting user base compared to free alternatives and file size limits.1 It maintains over 12 million users across 175 countries with positive perception for security and anonymity.23
Sources (9)
- https://en.wikipedia.org/wiki/Threema
- https://play.google.com/store/apps/details/Threema_Secure_and_private_Messenger?id=ch.threema.app&hl=en_NZ
- https://apps.apple.com/us/app/threema-the-secure-messenger/id578665578
- https://threema.com/en/faq/set-profile-pic
- https://threema.com/en/blog/profile-pictures
- https://threema.com/en/features
- https://threema.com/en/faq/get-my-data
- https://threema.com/en/profile-picture-generator
- https://www.youtube.com/watch?v=6ALprm0Ynyg