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🛡️ Privacy by Design. Security by Default.
Guardyn is a privacy-focused secure communication platform built with modern cryptographic standards. We provide end-to-end encrypted messaging, voice/video calls, and group communication with enterprise-grade security.
| Feature | Description |
|---|---|
| 🔐 E2EE Messaging | X3DH + Double Ratchet (Signal Protocol) |
| 👥 Secure Groups | OpenMLS (IETF RFC 9420) |
| 📞 Encrypted Calls | SFrame for voice/video |
| 📱 Multi-Device | Secure sync across all your devices |
| 🏢 Enterprise Ready | Audit logs, compliance, key management |
# Clone and enter dev environment
git clone https://github.com/guardyn/guardyn.git
cd guardyn
nix develop
# Start local Kubernetes cluster
just kube-create
just kube-bootstrap📖 Full Getting Started Guide →
| Page | Description |
|---|---|
| Getting Started | Set up your development environment |
| Architecture Overview | System design and components |
| API Reference | gRPC API documentation |
| Contributing | How to contribute |
| Page | Description |
|---|---|
| Encryption Architecture | X3DH, Double Ratchet, OpenMLS deep-dive |
| Security | Threat model and security practices |
┌─────────────────────────────────────────────────────────────┐
│ ZERO KNOWLEDGE ARCHITECTURE │
│ │
│ ✓ Server CANNOT read your messages │
│ ✓ Private keys NEVER leave your device │
│ ✓ Forward secrecy protects past messages │
│ ✓ Post-compromise security protects future messages │
└─────────────────────────────────────────────────────────────┘
Our Encryption Stack:
- 1:1 Chats: X3DH + Double Ratchet (same as Signal)
- Groups: OpenMLS (IETF RFC 9420) — better than Matrix's Megolm
- Media: ChaCha20-Poly1305 + SFrame
| Layer | Technology |
|---|---|
| Backend | Rust 🦀 |
| Client | Flutter/Dart |
| Protocol | gRPC + Protocol Buffers |
| Database | TiKV + ScyllaDB |
| Messaging | NATS JetStream |
| Infrastructure | Kubernetes |
| Builds | Nix (reproducible) |
| Component | Status |
|---|---|
| Backend Services | ✅ Complete |
| Flutter Client | ✅ Complete |
| E2EE (1:1 messaging) | ✅ Complete |
| E2EE (Group messaging) | ✅ Complete |
| Voice/Video Calls | 🔄 In Progress |
| Public Beta | 📅 Q2 2026 |
- 💬 GitHub Discussions — Questions & Ideas
- 🐛 Issues — Bug Reports
- 🔒 Security Policy — Report Vulnerabilities
- 📖 Contributing Guide — Start Contributing
Guardyn is open source. See LICENSE for details.
Built with 🛡️ by the Guardyn Team
Privacy is not a feature. It's a fundamental right.