MultiMail brings Gmail, Outlook, Yahoo, and your other webmail accounts out of the browser and into one Windows app. Each account runs the provider's own web version and stays isolated from the others.
Singlebox handles your inboxes the same way, on Mac and Windows, next to every other web app you use.
At a glance
| Singlebox | MultiMail | |
|---|---|---|
| What it is | A dedicated desktop app for your messaging, email, and work apps | A Windows app for webmail accounts |
| Platforms | macOS, Windows | Windows 10 and Windows 11 |
| Your email provider's own web app, with all its features | Each provider's own web version, plus snippets and a scratchpad | |
| Multiple accounts | Every app or account is its own profile with an isolated session | Isolated accounts in one window |
| Adding apps | Pick from 65,000+ apps in the catalog or add any website | Gmail, Outlook, Yahoo, Proton, iCloud, and 20+ other email providers |
| Notifications and badges | Unread badges on each app and on the Dock or taskbar; mute any app | Desktop alerts that show which account received a message |
What is Singlebox?
Singlebox is a dedicated desktop app for your messaging, email, and work apps. Every app or account is its own profile with an isolated session, so every inbox stays signed in side by side. Links open in your default browser, or follow rules that send them to a specific profile.
What is MultiMail?
MultiMail is a Windows app for webmail accounts, covering Gmail, Outlook, Yahoo, Proton, iCloud, and 20+ other providers. It keeps each account isolated and adds desktop alerts, snippets, and a scratchpad. This comparison is based on MultiMail for Windows.
1. Mac and Windows
MultiMail is built for Windows 10 and 11. If you also use a Mac, at home or at work, your inboxes stay behind.
Singlebox runs on both macOS and Windows. Add your accounts once, and your profiles, bookmarks, and settings sync across your computers.
2. Your inbox, and everything around it
A reply often leads somewhere else: the Slack thread it mentions, the Notion page you need to update, the invoice in your accounting app. In Singlebox, those apps sit in the same window as your inboxes, each a click or a keyboard shortcut away. Pick from 65,000+ apps in the catalog or add any website.
3. Accounts kept apart, and in view
Both apps keep every account isolated. In Singlebox, every inbox is its own profile, side by side in the profile bar with its own unread badge. Mute any profile that can wait, and link rules send each link to the right account.
4. More inside each app
Every app has tabs and tab groups, a command palette for jumping between apps, and the 1Password, Bitwarden, and LastPass extensions built in.
Moving from MultiMail
- Download Singlebox on your Mac or PC.
- Add Gmail, Outlook, Yahoo Mail, or any other webmail from the catalog, plus the other apps you use.
- Add a profile for each account. Your mail lives with your provider, so there's nothing to export.
Which one should you choose?
MultiMail is still a good fit if you:
- Only use Windows and want an app made only for email
- Want snippets and a scratchpad beside your inbox
Singlebox is the better fit if you:
- Use a Mac, or both a Mac and a PC
- Want your chat and work apps next to your inboxes
- Want tabs, link rules, and password managers inside each app
Keep every inbox and the apps around it in one window: try Singlebox for free.
