Dap Messenger

Most messengers ask you to trust a phone number, or a company's word, for who you're talking to. Dap starts somewhere better: a real handshake.

THE DAP
Meet up, point your phones at each other, and Dap exchanges keys directly between the two devices, camera to camera. That contact is now verified in person, and a different key can never quietly take their place. Can't meet? Add someone with a link instead. Dap labels every contact with how it was verified, so you always know who you've confirmed face to face.

NO ACCOUNT. NO PHONE NUMBER.
There's nothing to sign up for: no phone number, no email, no username, and no address-book upload. Your identity is a key your phone creates and keeps.

END-TO-END ENCRYPTED, BUILT FOR WHAT'S NEXT
Messages, photos and voice notes are encrypted on your phone and decrypted only on your contact's. Dap runs its own end-to-end protocol, built on standard, audited cryptographic building blocks, with post-quantum key agreement (X25519 plus ML-KEM-1024) and forward secrecy: every message gets its own keys.

A RELAY THAT CAN'T READ YOU
When your contact is offline, Dap leaves a sealed envelope at an anonymous mailbox on our relay. The relay holds only ciphertext it has no key for. It never sees your messages, your name or who you're talking to. Notifications say only "New message", with no sender and no content.

DISAPPEARING, YOUR WAY
• Read-once messages, and timers that start when a message is first viewed
• An auto-delete deadline that applies even to messages nobody opens
• Disappearing Dapper: wipe a whole conversation every time you leave it
• Screenshots and screen recordings of Dap are blocked

MORE
• Photos and voice notes, end-to-end encrypted
• Type-to-speak voice notes in a synthetic voice, so your real voiceprint never leaves your phone
• Group chats with the people you've dapped
• App lock with a PIN: your keys are sealed whenever you step away
• No link previews, and a clear warning before a link takes you out of Dap
• Dappy channels: subscribe to broadcasts, like Iown News for product updates

HONEST ABOUT LIMITS
No app can stop someone from photographing their screen with another device, and disappearing messages depend on the other person's copy of Dap working as designed. We'd rather tell you that than promise the impossible.

Dap is made by I Own Software.