Franz 6, released in 2026, turned Franz into a messaging hub with its own mail client, a native Signal client, to-dos, a calendar view, and AI.
Singlebox takes a lighter approach: it runs the web apps you already use, with every account signed in, in one window.
At a glance
| Singlebox | Franz | |
|---|---|---|
| What it is | A dedicated desktop app for your messaging, email, and work apps | A messaging hub with built-in mail, calendar, to-dos, and AI |
| Platforms | macOS, Windows | macOS, Windows, Linux |
| Your email provider's own web app, with all its features | Built-in Franz Mail client with a priority inbox | |
| Multiple accounts | Every app or account is its own profile with an isolated session | Separate accounts in isolated containers |
| Organizing apps | One profile bar with folders, tabs and tab groups inside each app, and a command palette | Workspaces (1 on the free plan) |
| Adding apps | Pick from 65,000+ apps in the catalog or add any website | 75+ services, plus any website |
| App lock | Password, or Touch ID on Mac, with auto-lock | PIN lock (Pro and above) |
| Sync across computers | Profiles, bookmarks, and settings sync on every plan | Services, workspaces, and settings sync when you sign in |
What is Singlebox?
Singlebox is a dedicated desktop app for your messaging, email, and work apps, on Mac and Windows. Every app or account is its own profile with an isolated session, so your inboxes and chats stay signed in side by side, each with its own unread badge.
What is Franz?
Franz is a messaging hub for recruiters, consultants, founders, and operators. Alongside your services, it adds Franz Mail with a priority inbox, a native Signal client, to-dos, a calendar view, search across services, snippets, translation, and AI. This comparison is based on Franz 6.
1. Keep the apps you know
Franz adds its own layer on top of your services. Singlebox doesn't replace your email or chat apps with its own versions: it runs each service's own web app, so every feature you rely on is still there. There's no new inbox to learn and nothing to move over.
2. Every account side by side
Franz runs services in isolated containers and groups them into workspaces. Singlebox gives every app or account its own profile with an isolated session, so a second inbox or chat workspace is one click away and stays signed in.
3. Your email, your way
Instead of a separate mail client, Singlebox runs your email provider's web app with all of its features. If you use several email accounts, each one gets its own profile, and you can make Singlebox your default email client so email links open in the inbox you choose.
4. Simple, with room to grow
Singlebox keeps the basics simple, with your apps in one profile bar and optional folders. When you want more control, tabs and tab groups, link rules, and custom CSS and JavaScript are there.
Moving from Franz
- Download Singlebox and sign in.
- Add your services from the catalog, or paste any website's address.
- Sign in to each account. Every account gets its own profile, and you can keep using Franz until you're ready.
Which one should you choose?
Franz is still a good fit if you:
- Want a built-in mail client with a priority inbox, or a native Signal client
- Want to-dos, a calendar view, and search across mail and messages in the same app
- Want AI features, including the option to run models locally
- Use Linux
Singlebox is the better fit if you:
- Are happy with the apps you already use, as they are
- Want every account signed in, side by side
- Want your email provider's own web app, with all its features
- Want a simple setup with room to grow
Bring the apps you already use into one window: try Singlebox for free.
