OpenParallel
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Two of the same app. Each with its own login.

OpenParallel makes a second copy of an app you already have, with its own icon and its own data, so another account stays signed in beside the first. The app itself is never changed.

Download Windows and Linux

Free and open source under the MIT license.

Illustration. Click the copy in the Dock to open it again. The apps shown come from the tested list; their makers aren’t involved with OpenParallel.

Three steps, in an app that looks like the rest of your computer.

No settings files and no command line. OpenParallel lists the apps you have and says plainly what a copy of each one gets before you make it.

  1. Pick the app

    Your apps, grouped by what a copy gets: its own login and data, a second window with the same data, or nothing because the app allows only one copy.

  2. Name the copy

    It’s called “Discord Parall” unless you rename it. Separate login and data is on wherever the app allows it.

  3. Open it like any app

    It waits in the Dock and Launchpad under its own name. Sign in to the other account once and it stays there.

Same app. Everything that makes it yours, kept apart.

A copy runs the very app you installed, so it updates when the app does. What it gets is its own place for the things that make an account yours.

Separate in every copy

  • Sign-ins and the accounts behind them
  • Cookies, history and site data
  • Settings, extensions, themes and caches
  • Its own name and icon in the Dock

Shared with the original

  • The program itself: installed once, updated once
  • Your documents and folders, as with any app
Chrome, Edge, Brave and other Chromium browsersTheir own profile folder.
Slack, Discord, Obsidian, Claude and other Electron appsTheir own user data folder.
VS Code, Cursor and VSCodiumTheir own settings and their own extensions.
Firefox, LibreWolf and ZenTheir own profile, kept from the original’s.
Telegram DesktopIts own working folder, signed in on its own.
Any websiteIts own window with its own cookies, separate from your browser.
JetBrains IDEs, and other apps on LinuxTheir own settings and caches. Marked Experimental until tested.
Zoom, Steam and others that allow one copyNot supported. Where a website version exists, OpenParallel offers that instead.

Check your app before you download.

Every app has a status that says exactly what was shown. Tested means this exact version ran as two copies with separate data. Nothing is rounded up.

AppStatusNote
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On macOS.See every app and what each status means

Private, because there’s nothing to send.

It doesn’t use the network

No account, no analytics, no update checks. Your apps talk to their own services as usual.

Nothing runs in the background

A copy is an ordinary shortcut and a data folder. OpenParallel runs only while you have it open.

The original app is never touched

Its files and its own data stay exactly as they were. Copies live in a folder of their own.

Removing is reversible

Moving a copy to the Trash takes its shortcut and data with it, and you can put them back.

Open source

MIT license. The code goes public with the first release.

Download OpenParallel.

Free, with no installer to click through and no account to make.

macOS

Open the zip and drag OpenParallel to Applications.

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Windows

Unzip it anywhere you like to keep it and run OpenParallel.exe.

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Linux

Unpack it and run install.sh, no sudo needed.

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Linux on ARM

The same, for 64-bit ARM computers.

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