🐅 TigerChat

The fastest, safest, and most trustworthy chat backend on earth—engineered like a financial ledger, delivered like a message.

What is TigerChat?

TigerChat is a distributed, fault-tolerant, real-time chat infrastructure built with Tiger Style principles. It combines TigerBeetle-level correctness with game-server-grade latency, providing strong consistency, replayable history, and millisecond fan-out for chats ranging from small DMs to high-traffic community rooms.

Design Goals

• Safety before performance — Correctness and invariants are first-class; every path is simulation-verified
• Performance is predictable — Microsecond tail-latency discipline; no unbounded queues
• One binary, zero mystery — Single static Zig binary, no dynamic dependencies
• Transparent fault recovery — Users never lose messages, even under leader election or restart
• Auditable by design — Every commit, view change, and operator action is cryptographically traceable

Core Features

• Strongly-ordered replication via Viewstamped Replication (VSR) consensus per room
• Exactly-once delivery with idempotency keys
• Sub-5ms P99 latency within an availability zone
• Zero data loss under fault injection (30k+ simulation coverage)
• Cryptographic integrity with Ed25519 signatures and SHA256 hash chains
• Built-in simulation harness for deterministic testing

Performance Targets

Project Status

🚧 Pre-alpha — Currently in design and specification phase. Implementation in progress.

Documentation

• Product Requirements
• Protocol Specification
• Message Formats
• Invariants Table
• Test Plan
• Build Structure

License

MIT