Private · Encrypted · No third parties

Download Companion

The desktop companion enables secure, end-to-end encrypted file transfer between your phone and computer — without uploading files to any server.

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Windows
Windows 10 / 11 · 64-bit
↓ Download
🍎
macOS
macOS 12+ · Intel · Apple Silicon via Rosetta
↓ Download
🐧
Linux
Ubuntu 20.04+ · Debian · 64-bit
↓ Download
🧑‍💻
Build from source
Go 1.22+ required · All platforms
↓ Source

Installation

Windows — Run the downloaded .exe. If Windows SmartScreen appears, click More info → Run anyway. The app lives in your system tray.
macOS — Open Terminal and run:
chmod +x companion-macos-amd64 && ./companion-macos-amd64
If Gatekeeper blocks it: System Settings → Privacy & Security → Open Anyway.
Linux — Open Terminal and run:
chmod +x companion-linux-amd64 && ./companion-linux-amd64
Requires a system tray (GNOME with AppIndicator extension, KDE, XFCE).

Build from source

Download companion-source.zip, extract it, then:

Prerequisites
• All platforms: Go 1.22+
• Linux only: sudo apt install libgtk-3-dev libayatana-appindicator3-dev
• macOS only: Xcode Command Line Tools (xcode-select --install)

Build
cd go-companion
go mod tidy
go build ./cmd/companion

The compiled binary appears in the current directory. Run it and it appears in your system tray.
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