Early version. me3 has not been independently audited yet. Please don’t rely on it where your safety depends on it. Why

Private messenger · works in your browser

Private messages, without handing over your phone number.

me3 is an end-to-end encrypted messenger. There’s no account, no phone number and no email. You add a friend once — in person, or with a one-time invite — and from then on your phones talk through a relay that only ever sees scrambled data.

Open me3 How it works

In discreet mode a friend shows up as a code like this, which changes every 30 seconds. Only your two phones can work it out.

Added in person

You meet, one of you shows an invite QR code, the other scans it. That’s the whole “sign-up”. Each invite works once and runs out after seven days.

Codes instead of names

Turn on discreet mode and contacts appear as rotating codes rather than names. Every pair of friends has its own secret, so a code means nothing on anyone else’s phone.

Published designs, not home-made crypto

me3 follows Signal’s published X3DH and Double Ratchet specifications and uses the libsodium library for every cryptographic step. Security model

What the server sees

Messages are encrypted on your phone before they leave it. Our server stores them under mailbox numbers that change every six hours, keeps them for at most seven days and deletes them once they’re collected. It never has your keys, your contacts’ names or what you wrote.

It can still see some things, like the IP address a request comes from, when it arrives and roughly how big it is. We explain that honestly on the security page.

Before you rely on it

Not audited yet. No independent security firm has reviewed me3. Until one has, don’t use it where your safety depends on it.
It’s a web app. Your browser downloads the code from our server, so you are trusting that server to send honest code each time.
No backups. Keys live only on your device. Lose the phone or wipe it and the conversations are gone.

Also included

Safety numbers: Compare a 60-digit number side by side to be sure nobody is in the middle.
Disappearing messages: Set a timer per conversation: 5 minutes, an hour, a day or a week.
Device lock: Everything on the phone is encrypted with a key unlocked by your passphrase.
Panic wipe: One button erases every key and message from this device.
Block and report: Block anyone instantly, and report abuse with only the messages you choose.
No ads, no trackers: No advertising, analytics or third-party code anywhere on me3.