mailbox.org on your desktop, inside Franz
Run mailbox.org as a desktop app on Mac, Windows, and Linux, with multiple accounts and new-mail notifications, in Franz.
- macOS
- Windows
- Linux
mailbox.org is the German, privacy-respecting provider people choose when they want secure mail, calendars, and contacts without ads or tracking, hosted under strong European data protection. Its web suite at office.mailbox.org packs a lot in, but a full webmail suite in a browser tab is still a browser tab, easy to close and easy to lose. Franz loads the mailbox.org web experience as a dedicated desktop service, so the inbox you picked for privacy and the calendar that comes with it get a permanent, signed-in home in the sidebar.
The whole mailbox.org suite, pinned and ready
Because Franz runs mailbox.org as its own persistent service, your mail, calendar, and contacts stay loaded and one click away rather than something you reopen each time you need it. If you keep a personal mailbox.org account alongside one for work or an organization, you can add the service more than once and stay signed in to each at the same time, every tab with its own session and its own unread badge. A red dot always points at the right account, and your private inbox stays cleanly separate from your other mail.
New mail you do not have to go looking for
Franz surfaces native desktop notifications for mailbox.org, so a new message lands on your desktop the moment it arrives instead of waiting silently inside a suite you forgot to leave open. The unread badge on the tab keeps a live count, and because the mailbox runs as its own service, it keeps notifying you while you are focused on something else. You stay responsive on a privacy-first address without leaving a browser window parked open all day.
A consistent suite across macOS, Windows, and Linux
Franz is a native desktop app for macOS, Windows, and Linux, and mailbox.org works the same on all three, with a real dock or taskbar badge and the same notifications wherever you are. If you split your time across operating systems, your mailbox.org setup feels identical on each one instead of being rebuilt per device. It is the simplest way to give a European, privacy-minded mail and calendar suite a proper desktop home alongside the rest of your day.
Other Email services
Frequently asked questions
Which platforms does mailbox.org work on in Franz?
Franz runs mailbox.org as a native desktop app on macOS, Windows, and Linux, with the same notifications, badges, and fast switching on every operating system.
Can I use multiple mailbox.org accounts at once?
Yes. Franz lets you add mailbox.org as many times as you need, one tab per account, all signed in at once. Each tab keeps its own session and unread badge, so you never sign out of one to check another.
Is mailbox.org in Franz free?
Franz is free to use with mailbox.org and every other service. A free account covers the essentials and takes minutes to set up; paid plans add extra features, but running mailbox.org in Franz costs nothing to start.