Messages that stay between you two.

How Zuno keeps quiet

Encrypted before it leaves your device

Messages, calls and files are encrypted on your device and decrypted only by the people they're for.

zuno.chat keeps to itself

Accounts on zuno.chat talk only with each other. zuno.chat exchanges messages with no other address, which leaves far less to attack.

A username, not a phone number

Zuno never asks for a phone number. An account on zuno.chat takes a username, a password and an email address, used only to confirm sign-up and reset a forgotten password. Nobody you talk to sees the email, though a username with your real name in it still says who you are.

Open code, no trackers

Zuno is free and open source, so anyone can check what the app does. It has no ads, trackers or analytics.

Encrypted at every step, not just in transit

End-to-end encryption in Zuno covers more than messages: files and calls too, and notifications carry nothing to read.

Messages

Encrypted on your device and decrypted only on the devices they're for. Nobody in between, zuno.chat included, gets the key to read them.

Photos, video and files

Encrypted before they're uploaded, and photos and videos lose their GPS location and EXIF data first. The key travels only inside the encrypted message.

Calls

Encrypted on your device, with the key shared only between the devices on the call. The relay that connects the call can't decrypt it.

Notifications

Carry no sender and no content. Your device fetches and decrypts the message itself, so push services never see it.

What encryption can't hide

Encryption hides what people say, not everything around it. The people who run your account's address can still see who talks to whom, and when. A screenshot or a compromised device is beyond Zuno's reach.

All nine layers, and what each one protects you from: how Zuno keeps your messages private.

In the app

Messages

Chats and rooms, with replies, edits and reactions.

Voice and video calls

Encrypted calls, one to one or in a room, that hold up on mobile networks. They work on zuno.chat and on other addresses set up for Zuno.

Photos, video and files

Share media and documents, with a gallery for every chat and room.

Location

Share where you are as a pin on a map.

Your Matrix account

Use a Matrix account you already have, or make one on zuno.chat with a username, a password and an email address.

Device verification

Confirm a contact's device, so you know you're talking to them.

Encrypted backup

Restore your history with a recovery code only you hold. Nobody can recover a lost code.

Rooms with roles

Owners, moderators and control over who can do what.