Zerion Chat

Zerion is a private messenger. It runs over Tor, so your IP address is hidden from the people you message and from the network. There's no phone number, no email, no account on a server. Your messages live encrypted on your device.

Everything is end-to-end encrypted with hybrid post-quantum cryptography — both today's standard algorithms and the new NIST quantum-resistant ones. If quantum computers arrive sooner than expected, your old conversations stay safe.

WHAT YOU CAN DO

• One-to-one chats with end-to-end encryption

• Group chats up to a few dozen people

• Voice calls over Tor

• Send photos, videos, voice notes, and documents

• Disappearing messages

• A built-in vault for passwords, notes, and private files

• Channels — a publisher-to-subscriber broadcast layer with optional discussion threads (new in 2.0)

NEW IN 2.0 — CHANNELS

Channels are a one-to-many space. One person writes, many people read.

• Public channels: anyone with the invite link can subscribe

• Private channels: subscribers ask to join, the owner approves

• Discussion threads: owners decide whether subscribers can reply under each post

• Editor delegations: let trusted people post without sharing your identity key

• Pinned posts, reactions, attachments

• No subscriber-to-subscriber metadata leaks — subscribers don't see each other

NEW IN 2.0 — HARDENED MODE (OPT-IN)

Three independent protections under Security settings, all off by default:

• Refuse to start on tampered devices (unlocked bootloader, modified system)

• Refuse to start when a debugger, root, or hooking framework is detected

• Sign out automatically (or wipe) if ADB or file transfer is enabled over USB

PRIVACY AND SECURITY

• Tor-only transport — no Wi-Fi, Bluetooth, or LAN exposure

• No phone number, no email, no central server

• No telemetry, no analytics, no crash reporting

• No logging of any kind — verified at build time

• Encrypted at rest with SQLCipher and a password-derived key

• Screenshots blocked inside the app

• Notifications never show message previews

• Open source on GitHub, GPL v3, audited per release

WHO IT'S FOR

People who want to talk to other people without a third party in the middle. Journalists and their sources, activists, lawyers and their clients, people in countries that block secure messengers. Anyone who doesn't want to hand a phone number to a tech company every time they install a messenger.

LEARN MORE

• Website: https://zerion.chat

• Source: https://github.com/zerionproject/Zerion

• F-Droid: https://fdroid.zerion.chat/fdroid/repo

Built on the Bramble protocol. GPL v3.