New version out for Windows & Mac

Say anything.
Share nothing.

Max is a fast, beautiful messenger with end-to-end encryption on by default. Messages, voice & video calls, group calls and screen sharing — locked with keys that never leave your devices.

Download for Windows
Also on macOS Google Play
Free  ·  No ads  ·  iOS coming soon
End-to-end encrypted by default
One account, all your devices
Voice, video & group calls
What is Max?

One app for everything you say

Max Messenger is a modern chat app for desktop and mobile. Text, call, share your screen and work in groups — with privacy built into every single message, not added on top.

Rich messaging

Text, photos, videos, files and voice notes — delivered instantly, with read receipts and typing indicators.

Voice & video calls

Clear 1:1 calls that start as voice and upgrade to video mid-call — without hanging up.

Group calls

Bring several people into one call, or grow a 1:1 call into a group conversation on the fly.

Screen sharing

Share a single window or your whole screen in one click — perfect for demos, support and teamwork.

Multi-device

Your phone plus as many desktops as you like. Every device gets its own encryption keys, and history stays in sync.

Backup & restore

Take your conversations with you. Encrypted backups let you move to a new computer without losing a word.

Security first

Only you can read your messages

Every message is encrypted on your device before it leaves, and can only be decrypted by the person you sent it to. Not by the network. Not even by our own server.

Encrypted by default, always

End-to-end encryption isn't a "secret chat" mode you have to remember to turn on. Every conversation is protected from the very first message.

Keys that never leave your hands

Each of your devices makes its own encryption keys and keeps them locally. Keys keep moving forward, so past messages stay safe even if a key is ever exposed.

Your data is not the product

No ads, and no reading your conversations. The server relays encrypted messages — it can't read them, so it can't sell them.

How it works

What happens when you press send

Follow one message from your keyboard to your friend's screen. Watch it play, or step through it yourself.

Your laptop
What actually leaves
Key for Emma's phone Key for Emma's laptop
In between
Max server
No key — can't read it
Emma's devices
Phoneunlocked
Laptopunlocked

You write a message

Right now it exists only on your laptop, as plain text. Nothing has left your device yet.

Plain text · on your device only

A new key for every message

Each message gets its own random key, so cracking one message would tell an attacker nothing about the next.

Every device holds its own keys

Your phone and each desktop have separate keys. You can see and compare every device's fingerprint in a contact's profile.

An open, proven protocol

Max uses OMEMO, the XMPP standard built on the Signal protocol's Double Ratchet — not a home-made cipher.

Calls that feel close

From "hey" to face-to-face in one tap

Start a voice call, switch on video mid-conversation, pull in more people, share your screen — all inside the same encrypted call.

  • Voice calls upgrade to video without redialing
  • Promote any 1:1 call into a group call
  • Share a window or your full screen while you talk
  • Answer on your desktop or your phone — your choice
Questions

Good questions, straight answers

Can Max, or anyone else, read my messages?
No. Messages are encrypted on your device and can only be decrypted on the devices of the people you're talking to. Our server passes them along as ciphertext it has no key for.
Is Max free?
Yes. Max is free to download and use.
Can I use Max on more than one device?
Yes — your phone plus as many desktops as you like. Each device gets its own encryption keys, and a new computer is confirmed from a device you're already signed in on.
How do I know I'm talking to the right person?
Every device has a fingerprint. Open a contact's profile to see theirs, and compare it with what they see on their own device — if they match, nobody is in between.
How do I move to a new computer?
Create an encrypted backup in Max, then restore it on the new computer. Your conversations come with you.
Which platforms are supported?
Windows 10 and 11, macOS (Apple Silicon and Intel), and Android through Google Play. iOS is on the way — the link will appear on this page as soon as it's live.
Get Max

Download Max Messenger

Free, fast and private. Available now for Windows, macOS and Android — iOS is on the way.

Windows

Windows 10 and 11, 64-bit

Latest version Download

~181 MB · updates itself

macOS

macOS 12 Monterey or later

Latest version Download

Apple Silicon · ~240 MB · Intel Mac?

Questions or trouble installing? Visit support.