# Texrr

> Device-to-device encrypted messenger with cryptographic proof of conversation integrity. No server storage. No recovery. No compromise.

Texrr is a mobile messaging application built by 132 Engineering (Edmonton, Alberta, Canada). Messages are encrypted on the sender's device using AES-256, transmitted directly to the recipient's device via WebRTC peer-to-peer channels, and verified using cryptographic hash chains and Merkle proofs. No message content ever touches a server.

## Key Facts

- Encryption: AES-256, executed locally via immutable Go binary
- Transport: WebRTC peer-to-peer (no server relay)
- Contact exchange: QR code only (no phone number, no directory, no search)
- Integrity verification: Hash chains + Merkle proofs, auto-verified every 50 messages
- Server stores: Email, username, public key. Nothing else.
- Pricing: $4.99/year or $29.99 lifetime (consumer). Custom per-seat annual contract (enterprise).
- Age restriction: 18+
- Platforms: iOS, Android (coming soon)

## Five On-Device Binaries

1. LayerOneL — AES-256 encryption engine
2. ledger-memo — Hash chain ledger
3. MerkleProof — Merkle tree proof generation and verification
4. texrr-messenger — Message queue and delivery
5. verify-user — Chain verification and integrity alerts

All binaries are immutable, stateless Go executables. Each invocation starts, processes, returns JSON, exits. Independently auditable.

## Enterprise

Self-hosted deployment on your infrastructure. Three models: private cloud, on-premise, and air-gapped. Includes self-hosted auth (Supabase), signaling server, STUN/TURN (coturn), bulk QR provisioning, admin dashboard, MDM distribution, and verification reports.

## Compliance

- GDPR: Minimal data (email, username, public key). No message data to regulate.
- HIPAA: No PHI on any server. Device-to-device AES-256.
- SOC 2: Self-hosted means your scope covers your infrastructure.
- Subpoena: Server holds email, username, public key. That is everything.

## Links

- Homepage: https://texrr.app
- Enterprise: https://texrr.app/enterprise
- Support: https://texrr.app/support
- Privacy Policy: https://texrr.app/privacy
- Terms of Service: https://texrr.app/terms
- Full LLM context: https://texrr.app/llms-full.txt
- Built by: 132 Engineering — https://132eng.dev
- Contact: texrr@132eng.com