Desktop Companion

Private captions,
on your computer.

The Companion runs English speech recognition locally and sends captions to the Chrome extension over a private loopback connection. It is what makes Pro captions unlimited: nothing is uploaded, and nothing is metered.

Detecting your device…

Choose your download Get Chrome extension

The app is free and included in every paid plan — it needs the Audio Captions extension and an active one-day trial, Pro or Cloud Pro plan to run. Downloading the app alone does not unlock paid captions.

Choose a platform

The right app for your computer.

The page recommends your operating system automatically. You can still choose another platform below.

macOS

Apple silicon only — Intel Macs are not supported. Public releases are code-signed and notarized by Apple.

Download for Apple siliconRequires a Mac with Apple silicon · macOS 15 Sequoia or later

Windows

Local English captions on your own PC. The build is not code-signed yet, so Windows shows a “Windows protected your PC” notice on first run — choose More info → Run anyway.

Download for WindowsRequires 64-bit Windows 10 or later

Linux or ChromeOS

No desktop build yet. Cloud Pro captions these computers straight from Chrome, with nothing to install.

See Cloud ProNothing to install · runs in Chrome 116 or later

Setup

Three steps, then press play.

Add the extension

Install Audio Captions in Chrome and sign in to start the free trial.

Install the Companion

Open the application and leave it running while you caption.

Choose Automatic

The extension uses the private Companion first and cloud speech when needed.

Private captions,on your computer.