Test-phase version

Souverain for Windows

Version 1.0.74 · updated 3 November 2026

The Windows app is a second screen for your Souverain identity on your phone — your Friends, chats, photos, and audio and video calls on your PC. You link it once by scanning a QR code with the phone app.

In short: this is a test-phase version: not yet in the Microsoft Store and not yet code-signed, so Windows shows a warning during installation (see step 2). Your profile, Friends and chats stay on your phone; the PC only shows them.

Download Souverain for Windows

Souverain.msi · about 120 MB · Windows 10/11, 64-bit

1. Requirements

Windows 10 or 11, 64-bit. About 250 MB of disk space (the app brings its own runtime).
The Souverain app on your iPhone or Android phone, with your profile — the PC gets its identity from the phone.
Optional: a webcam and microphone for calls and photos.

2. Install

Download Souverain.msi (button above) and open it.
Windows shows "Windows protected your PC" (SmartScreen) because this test build is not code-signed yet. Click More info, then Run anyway. Your browser may also ask you to confirm the download ("Keep").
Follow the installer (no administrator rights needed; it installs for your user account). Souverain appears in the Start menu and on the desktop.

3. Link your phone

Start Souverain on the PC — it shows a QR code.
On your phone open Souverain → Settings → Link a Windows PC and scan the code.
Confirm on the phone. Within a few seconds the PC shows your Friends. That's it — the PC now uses your identity; messages and calls reach both your phone and your PC.

Your profile and your encryption key travel to that PC sealed with a one-time key; the Souverain servers only relay the sealed data and cannot read it. If you use several Souverain systems, create your profile on each system from your phone first; the PC follows.

4. Good to know (test phase)

Closing the window keeps Souverain running in the tray (next to the clock) so chats and calls still arrive; Quit from the tray icon ends it. Settings → This PC lets it start when you sign in to Windows.
The first camera or microphone use asks for permission (Windows privacy settings).
Not on the PC (phone features): discovering Souverain members nearby, sharing your location or a contact.
Problems? The app writes a daily log to %APPDATA%\Souverain\logs — send it to support@souverain.pro with a short description.

5. Update, unlink, uninstall

Update: download the newer Souverain.msi and install it over the old one — settings and chats are kept.
Unlink: Settings → This PC → Unlink this PC forgets your identity, key and chats on that PC only; your phone is untouched and you can link again any time.
Uninstall: Windows Settings → Apps → Installed apps → Souverain. Unlink first if you want the chat history removed from the PC as well (it lives in %APPDATA%\Souverain).

See also: Terms of Use · Privacy Policy · Support