Gupt

Encrypted chat, passwords, notes, bookmarks, and ephemeral sharing — with no phone number, no email, no account, and no central server.

Key features include:

• Anonymous — no phone number, no email, no account required
• End-to-end encrypted direct messages
• WebRTC voice & video calls
• Encrypted media uploads via decentralized file storage
• Group rooms via Nostr relays
• Local-first with offline cache (IndexedDB)
• Separate encrypted Bookmarks, Passwords, and Notes
• Anonymous file sharing

Gupt is fully client-side with no backend — it connects directly to public or private Nostr relays. Your keys, your messages, your privacy.