FastMail on your desktop, inside Franz
Run FastMail as a desktop app on Mac, Windows, and Linux, with multiple accounts and new-mail notifications, in Franz.
- macOS
- Windows
- Linux
FastMail is the inbox people choose on purpose: private, fast, ad-free email hosting for individuals and businesses who would rather pay for a clean mailbox than be the product. Its web client at fastmail.com is genuinely good, but a great web inbox is still a browser tab, and a browser tab gets buried. Franz loads the full FastMail web experience as a dedicated desktop service, so the inbox you deliberately chose gets a permanent spot in the sidebar instead of competing with everything else you have open.
Personal and business mailboxes together
FastMail is popular for running mail across several addresses and even custom domains, and Franz fits that neatly. Add FastMail more than once and you can keep a personal mailbox and a business mailbox signed in at the same time, each in its own tab with its own session and its own unread count. There is no logging out of one account to reach another, and a red badge always tells you which mailbox needs you. You manage folders, search, and filters exactly as you do on the web, because it is the same FastMail client, just wrapped as a focused window.
Fast inbox, immediate notifications
FastMail is built for speed, and Franz keeps that pace on the desktop by surfacing native notifications the moment new mail arrives, rather than leaving you to refresh a tab. The unread badge on the FastMail service keeps a live count, and because each mailbox runs separately, an urgent business message never hides behind a quiet personal one. You stay on top of incoming mail without leaving a browser window open all day just to watch the inbox.
FastMail on macOS, Windows, and Linux
Franz is a native desktop app for macOS, Windows, and Linux, and FastMail works the same on all three, with a real dock or taskbar badge and consistent notifications wherever you are. If you move between operating systems, your FastMail setup travels with you instead of being rebuilt per machine. It is the simplest way to give a privacy-minded mailbox a proper desktop home next to the rest of your day.
Other Email services
Frequently asked questions
Which platforms does FastMail work on in Franz?
Franz runs FastMail 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 FastMail accounts at once?
Yes. Franz lets you add FastMail 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 FastMail in Franz free?
Franz is free to use with FastMail and every other service. A free account covers the essentials and takes minutes to set up; paid plans add extra features, but running FastMail in Franz costs nothing to start.