Darkup

Darkup is a private, end-to-end encrypted messaging service—messages, photos, videos, voice notes, and voice/video calls. No phone number, no email, no account.

YOUR IDENTITY IS YOURS
Your identity isn't an account on our servers: it's a key pair created and stored on your phone, locked with a physical key. Without this key, no one can unlock your identity—not even us. No backdoors, no data recovery: security is absolute, and so is responsibility.

END-TO-END ENCRYPTED BY DESIGN
Our servers are simply blind relays: they carry encrypted data that they cannot read. The content of your conversations is never accessible to us.

ADD EACH OTHER IN PERSON
No directory, no strangers: you add a contact by scanning their QR code in person and verifying their identity verbally. This isn't anonymous chat.

WHAT YOU CAN DO
• Ephemeral text messages, photos, videos, and voice notes
• Encrypted voice and video calls
• Location and route sharing (Dark Maps)
• Read receipts, encrypted profile picture
• Block and report a contact
• Erase your identity and all your data in one tap

SECURITY
• Standard and proven encryption (Curve25519, Double Ratchet, Ed25519)
• Physical key lock (FIDO/PIV)
• 11 languages

Darkup is a private messaging service. The physical key and subscription are available at darkup.io.