What's new

Solo2 evolves constantly. Every line on this page is a real improvement, running in production.

We don't publish dates, we publish facts. What you see here is already available.

v5.1 infrastructure

Real-time communication

  • WebSocket for instant signaling between users
  • Smart polling as automatic fallback if WebSocket is unavailable
  • Reconnection with random jitter to prevent server overload
  • Zero-downtime deployment (blue-green deploy) for invisible updates
  • Automatic detection of stuck processes with admin alerts
v5.0 security feature

Sovereign identity and unlimited files

  • Random 256-bit master key — the same cryptographic level as Bitcoin
  • 24 recovery words (BIP39 standard) to restore your identity on any device
  • Offline access with recovery phrase — works without a server
  • File transfer of any size via direct P2P (tested with 10 GB)
  • Streaming to disk: the receiver writes directly without saturating memory
  • Automatic resumption if the connection drops during a transfer
  • SHA-256 integrity verification on every transferred file
  • End-to-end encrypted voice calls
  • End-to-end encrypted video conferencing
  • Device name and fingerprint to identify where you connect from
v4.0 security

Deterministic identity and multi-layer protection

  • Your password generates your cryptographic identity — it is not stored, it is computed
  • Device Secret: an invisible second layer that strengthens your password without any action on your part
  • Password rotation with automatic re-encryption of your entire vault
  • Recovery modal if the vault cannot be decrypted
  • TOFU (Trust On First Use) verification when switching devices
  • Ephemeral signals: signaling keys are generated per session and discarded
v3.17 feature ux

Full-featured chat and professional experience

  • Emoji reactions on messages (long press)
  • Delete messages for everyone (60-second window) with anti-spoofing protection
  • Ephemeral messages: self-destruct after being read
  • Instant search through conversation history
  • Time separators in chat (Today, Yesterday, full date)
  • Delivery and read confirmations with exact timestamps
  • History copy between tunnels
  • Ephemeral tunnels with timer (5 min, 15 min, 1 hour)
v3.15 feature

Multimedia and verification

  • Voice messages with waveform and in-chat playback
  • GeoStamp: GPS location cryptographically signed with Ed25519
  • Mirror Protocol: full sync between your own devices
  • Profile photos with built-in editor
v3.14 ux security

Professional design and anti-interference shielding

  • Complete visual redesign: soft bubbles, SVG icons, Voronoi pattern
  • Signaling shielding against cross-tunnel interference
  • Mirror Protocol: sync between your own devices
  • ICE Restart: fast reconnection without losing the encrypted session
  • Redesigned side panel with last message preview
v3.02 security feature

Total Zero Knowledge

  • The server stores no relationships between users — your local vault is the only source
  • Magic link invitations: one click to connect
  • Perfect Touch: auto-connect from push notification
  • Export and import of encrypted vault
  • Cryptographic contact identity verification (Safety Numbers)
  • Smart push notifications with cryptographic verification
v3.0 infrastructure

Modular architecture and performance

  • Backend rewritten with modular architecture (specialized handlers)
  • Frontend migrated to ES6 modules with optimized loading
  • Encryption accelerated by WebAssembly (up to 860x faster in batch operations)
  • Thread Pool for concurrent connections
  • Graceful shutdown without dropping active connections
v2.0 languages security

Internationalization and hardening

  • 36 languages available, including RTL support (Arabic, Farsi, Hebrew)
  • Password hashing with Argon2id (resistant to hardware-based attacks)
  • Database with WAL mode for maximum integrity
  • Automated deploy system with rollback
  • Dynamic TURN server for connections behind restrictive firewalls
v1.0 foundation

The beginning

  • End-to-end encrypted chat via WebRTC — messages never pass through any server
  • Backend written in Zig: native 5.8 MB binary with no dependencies
  • PWA installable on any device without an app store
  • Admin panel with authentication
  • Custom binary protocol (zcatpack) for efficient communication

Acceso anticipado por invitación. Solo2 está en desarrollo activo. Cada versión que ves aquí es código real funcionando en producción, no una promesa. Si quieres probar Solo2, solicita una invitación desde la página principal.

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