How do I switch from Sidekick Browser to Singlebox?

Download Singlebox, sign in, and add your apps from the catalog or by pasting any website's address. Then sign in to each account. Every account gets its own profile, so you can recreate your Sidekick Browser setup in a few minutes and keep using Sidekick Browser until you're ready.

Can I use several accounts of the same app?

Yes. Every app or account is its own profile with an isolated session, so you can stay signed in to several accounts of the same service at once. The free plan includes 2 profiles, and paid plans include unlimited profiles.

Is Sidekick Browser still available?

No. Sidekick announced that it would sunset the browser effective August 3, 2025. Singlebox is an actively developed alternative for keeping your work apps together.

Yes. Singlebox has a free plan with 2 profiles and cloud sync. Paid plans add unlimited profiles, app lock, built-in ad and tracker blocking, theme colors, and priority support.

Singlebox vs. Sidekick Browser

A replacement for a discontinued browser, without switching browsers.

Sidekick was a Chromium-based work browser with a sidebar of web apps next to your tabs. It was discontinued on August 3, 2025. Singlebox keeps the part many people loved, your work apps one click away, in a dedicated window with every account signed in, while your regular browser stays for browsing.

Download for macOS

Also available on Windows.

Last reviewed October 11, 2026 · Compared with Sidekick, discontinued in August 2025

At a glance

Singlebox

A dedicated window for messaging, email, and work apps, with every account signed in, unread badges, and sync across computers. Best for anyone looking for a Sidekick replacement that keeps their current browser.

Sidekick Browser

A Chromium-based browser for work, with a sidebar of sessions, workspaces, and app shortcuts beside your tabs, plus built-in blocking. It was discontinued on August 3, 2025.

The sidebar you liked, in its own window

Sidekick put your work apps in a sidebar next to your browser tabs, so Gmail, Slack, and your project tools were always within reach.

Singlebox gives those apps a window of their own. Your apps and accounts sit in the profile bar, each a click or a keyboard shortcut away, with tabs and tab groups inside each app and folders to keep a long list tidy.

Every account, side by side

In Singlebox, every app or account is its own profile with an isolated session, so your work and personal Gmail, or several Slack workspaces, stay signed in side by side, each with its own unread badge.

Moving from Sidekick

Download Singlebox, sign in, and add the apps you kept in Sidekick's sidebar from the catalog, or paste any website's address. Then sign in to each account. Your general browsing stays in your regular browser.

Feature comparison

Feature	Singlebox	Sidekick Browser
What it is	A dedicated desktop app for your messaging, email, and work apps	A Chromium-based work browser, now discontinued
Platforms	macOS, Windows	No longer available
Organizing apps	One profile bar with folders, tabs and tab groups inside each app, and a command palette	A sidebar of sessions, workspaces, and app shortcuts beside your tabs
Browsing and links	Links open in your default browser, or follow rules that send them to a specific profile	A full browser, so all your browsing happened inside Sidekick
Updates	Updated regularly, with automatic updates	Discontinued on August 3, 2025

Why Singlebox

Why choose Singlebox

Your work apps, one click away

Your messengers, email, and work tools sit side by side in the profile bar, each a click or a keyboard shortcut away, with unread badges showing where new messages are waiting.

Keep the browser you already use

Singlebox isn't a browser you have to switch to. Links to other sites open in your default browser, so if your browser ever changes, your work apps stay where they are.

Built to last

Singlebox is actively developed and updates itself automatically, and your profiles, bookmarks, and settings sync across your computers on every plan.

Where Sidekick Browser may be a better fit

Sidekick is no longer available, so it isn't an option for a new setup. If you relied on its browser features, such as its tab strip and built-in blocking, keep those in your regular browser and let Singlebox handle your work apps.

Which should you choose?

Sidekick was discontinued on August 3, 2025, so the question is what to use instead.

Choose Singlebox if you want your messaging, email, and work apps one click away, with every account signed in, without changing browsers.

Frequently asked questions

How do I switch from Sidekick Browser to Singlebox?: Download Singlebox, sign in, and add your apps from the catalog or by pasting any website's address. Then sign in to each account. Every account gets its own profile, so you can recreate your Sidekick Browser setup in a few minutes and keep using Sidekick Browser until you're ready.
Can I use several accounts of the same app?: Yes. Every app or account is its own profile with an isolated session, so you can stay signed in to several accounts of the same service at once. The free plan includes 2 profiles, and paid plans include unlimited profiles.
Is Sidekick Browser still available?: No. Sidekick announced that it would sunset the browser effective August 3, 2025. Singlebox is an actively developed alternative for keeping your work apps together.
Is Singlebox free?: Yes. Singlebox has a free plan with 2 profiles and cloud sync. Paid plans add unlimited profiles, app lock, built-in ad and tracker blocking, theme colors, and priority support.