Everything you need for private, flexible contact sharing.
Built around privacy — not convenience for advertisers.
Encryption keys are generated on your device and never leave it. Contact data is encrypted locally before upload — the server only stores encrypted blobs it cannot read.
Choose individually which data fields (name, phone, address, etc.) to share with each subscriber. Change your mind at any time.
Display your personal QR code so others can scan and add you instantly. Available in both the Android app and web client.
Subscribed contacts are automatically synced to the Android Contacts app under a dedicated Contastic account — no manual export needed.
Receive instant WebSocket notifications when someone subscribes to you or approves your subscription request.
Find other Contastic users by their publicly shared name or email. No phone number harvesting, no social graph.
Your encryption key is backed up on the server protected by your password — only you can decrypt it. No password, no access.
Every account gets a short personal URL. Share it with anyone — they can view your public contact details in a browser without creating an account.
Store any standard vCard field: FN, EMAIL, TEL, ADR, ORG, TITLE, URL, BDAY, and more.
Web and Android UIs are translated into English, German, Spanish, French, Hindi, and Chinese. Language is auto-detected from your browser or system locale.
Erase every record we hold for you in one click — from the app, the web client, or a standalone web form if you no longer have access. All sessions are invalidated instantly.
Use Contastic anywhere.
Built for modern Android phones. Syncs contacts directly to your address book. Requires Android 8.0 or later.
Works in any modern browser — no installation required. Full feature parity with the Android app.