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@vauchi

Vauchi

README.md

vauchi

Privacy-focused contact sharing

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

Stars License GitHub Sponsors Liberapay

📦 Canonical source: GitLab — GitHub is a read-only mirror

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, oblivious privacy-preserving 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 / macOS SwiftUI
Android Kotlin / Compose
Windows WinUI 3
Linux GTK4, Qt6
Crypto RustCrypto (ed25519-dalek, x25519-dalek, sha2, hmac, hkdf, chacha20poly1305)
TLS aws-lc-rs (via rustls)

Repositories

Core & Infrastructure

Repo Description
core Crypto, protocols, data models (Rust)
relay Oblivious privacy-preserving WebSocket relay server
ohttp-relay Oblivious HTTP relay
e2e End-to-end integration tests

Apps

Repo Description
cli Command-line interface
tui Terminal user interface
android Native Android app
ios Native iOS app
macos Native macOS desktop app
windows Native Windows desktop app
linux-gtk Native Linux desktop app (GTK)
linux-qt Native Linux desktop app (Qt)
web-demo Browser-based WASM demo

Platform Bindings

Repo Description
vauchi-platform-swift Swift Package (iOS/macOS)

Content & Docs

Repo Description
docs Public documentation (docs.vauchi.app)
website Landing page (vauchi.app)
features Gherkin BDD scenarios
locales Translations (i18n)
themes UI theme definitions
assets Brand assets and logos
scripts Shared CI templates and dev tools

Support the project

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

GitHub Sponsors   Liberapay

Website • Principles • Contributing

Popular repositories Loading

  1. .github .github Public

    A privacy-focused platform for exchanging contact information that stays up-to-date.

    1

  2. windows windows Public

    Vauchi — Native Windows desktop app (WinUI 3) (mirror of gitlab.com/vauchi)

    C# 1

  3. core core Public

    Vauchi — Rust core library — crypto, protocols, data models (mirror of gitlab.com/vauchi)

    Rust

  4. relay relay Public

    Vauchi — Zero-knowledge encrypted relay server (mirror of gitlab.com/vauchi)

    Rust

  5. cli cli Public

    Vauchi — Command-line interface (mirror of gitlab.com/vauchi)

    Rust

  6. tui tui Public

    Vauchi — Terminal user interface (mirror of gitlab.com/vauchi)

    Rust

Repositories

Showing 10 of 22 repositories
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