Tunnel messenger
Useful app
Free
About
A secure messaging app prioritizing privacy with end-to-end encryption for all communications. It offers a phone-number-free signup and quantum-safe key exchange, ensuring your conversations are protected.
✓End-to-end encryption for messages, photos, files, and calls
✓Quantum-safe key exchange
✓Username-based signup, no phone number or email needed
✓Encrypted voice and video calls
✓Per-conversation safety codes
✓Disappearing message timers
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What's New in Tunnel Messenger
2.4
May 15, 2026
New in 2.4: • Encrypted Vault — new tab replaces Status. Store notes, passwords, and files end-to-end encrypted on your device. Per-conversation Vault with audit trail. • Tunnel Pass — quantum-secure badge with cryptographic identity proofs in your Vault. • Emergency Mode lock screen — biometric/Face ID and PIN unlock, with optional duress decoy contacts. • Cryptographic delivery proofs — Ed25519-signed receipts for delivery and read events. • Security Dashboard — at-a-glance quantum/classical encryption badges per conversation. • Improved call reliability when the device is locked. • Self-delivery encryption — messages sent to your own devices now use Sesame ratchets. • Open registration on all platforms — sign up without an invite code. • Multiple stability and cryptographic interop fixes (hybrid X3DH per-ratchet path).
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FAQ
What makes Tunnel Messenger different from other messaging apps?
Tunnel Messenger offers end-to-end encryption on all content, including photos and files, and uses quantum-safe key exchange for future-proofing. It also allows signup with just a username, eliminating the need for a phone number or email.
Is Tunnel Messenger secure against future threats?
Yes, Tunnel Messenger utilizes modern Curve25519 cryptography combined with post-quantum CRYSTALS-Kyber for its key exchange. This ensures your conversations are protected against both current and potential future quantum computing attacks.
How does Tunnel Messenger handle user identity and accounts?
Your account in Tunnel Messenger is a cryptographic credential generated locally on your device. The server only stores a one-way hash of this credential, meaning Tunnel does not store your actual private key.
Can I use Tunnel Messenger on multiple devices?
Yes, Tunnel Messenger supports multi-device usage. You can import your credential onto a new device, and each device will receive its own per-device encryption keys for secure communication.
Does Tunnel Messenger offer encrypted voice and video calls?
Absolutely. Tunnel Messenger provides end-to-end encrypted voice and video calls. On iPhone, it also features native CallKit integration for a seamless calling experience.
How can I verify the identity of my contacts on Tunnel Messenger?
Tunnel Messenger allows you to verify contacts using per-conversation safety codes, which you can check in person. You can also add contacts by username, scanning a QR code, or pasting an invite link.
Does Tunnel Messenger have ads?
No, Tunnel Messenger does not contain advertisements. It is a completely free and ad-free application focused on user privacy.
How often is Tunnel Messenger updated?
Tunnel Messenger was last updated on May 15, 2026, with version 2.4. This indicates a relatively recent update, suggesting ongoing development and maintenance.