Vauchi
@Vauchi

Vauchi is an open-source app for exchanging
contact information in person and keeping it up to
date automatically. When your phone number, email, or address changes, everyone who has your card sees the
update — without you doing anything.

How it works

You meet someone and scan a QR code. That's it. From
that point on, your contact details stay in sync.
Everything is end-to-end encrypted — the relay server sees only encrypted blobs and cannot read any content.

What makes Vauchi different

• No accounts — your device is your identity
  
• No tracking — zero analytics, telemetry, or advertising IDs
  
• No data harvesting — we can't read your contacts, even if we wanted to
  
• Granular privacy — share work details with colleagues and home info with family, from one identity
  
• Physical recovery — lost your phone? Regain access through in-person verification with trusted contacts
  
• Cross-platform — iOS, Android, desktop, CLI
  

Why we need funding

Vauchi has no VC backing and no data-monetization business model. We are entirely community funded. Donations go directly toward:

• Relay server infrastructure (hosting, bandwidth)
• Security audits of our cryptographic implementation (X3DH, Double Ratchet, AES-256-GCM)
• Testing devices across platforms
• Development time to reach public beta and app store releases
  

Links

• Website: vauchi.app
  
• Source code: gitlab.com/vauchi
  
• License: GPL-3.0-or-later