vauchi

Privacy-focused contact sharing

Exchange contact cards in person. Update your info anytime.
End-to-end encrypted. No accounts. No tracking.

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How it works

1. Meet someone → Scan their QR code
2. Stay connected → Update your card anytime, they see the changes
3. Stay private → End-to-end encrypted, zero-knowledge relay

Why Vauchi?

• No accounts — Your device is your identity
• No tracking — No analytics, no telemetry, no ads
• No trust required — We can't read your data, even if we wanted to
• Open source — Verify our claims yourself

Tech stack

Component	Technology
Core	Rust, Signal Protocol (X3DH + Double Ratchet)
iOS	SwiftUI
Android	Kotlin/Compose
Desktop	Tauri + SolidJS
Crypto	ring (audited, no OpenSSL)

Repositories

Repo	Description
vauchi	Meta-repo, documentation, roadmap
core	Core library + mobile bindings
relay	Zero-knowledge WebSocket relay
cli	Command-line interface
desktop	Desktop app (Tauri)
android	Android app
ios	iOS app

Support the project

Vauchi is community-funded. No VC money, no data harvesting.

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Website • Principles • Roadmap • Contributing