We make TopDock, so read this with that in mind. We've kept the descriptions of other apps general and based on their public websites as of October 2026. Features and prices change, so check each vendor's site before you decide.
The five kinds of inbox app
| Kind | Examples | Good for | Trade-off |
|---|---|---|---|
| Desktop email clients | Mailbird, eM Client, Thunderbird, Outlook for Windows | Doing all your email, often with calendar and contacts, in one program | A big window you have to switch to; another app to learn |
| Web-app workspaces | Wavebox, Shift, Rambox | Running Gmail, Slack, docs and other web apps side by side in one window | Essentially a browser for your apps, with a browser's memory use |
| Gmail wrappers | Kiwi for Gmail | Gmail in its own desktop window instead of a browser tab | Built around Gmail; other services are secondary or missing |
| Browser extensions | Checker Plus for Gmail, Notifier for Gmail | Free, quick Gmail alerts and a mini inbox in the browser toolbar | Only runs while the browser is open; usually Gmail only |
| Glanceable bars | TopDock | Seeing what's new across Gmail, Outlook, X and Reddit, answering fast, then closing it | Not a full client: no calendar, no heavy filing or rules |
Examples are illustrative, not a ranking. Several apps span more than one category.
Desktop email clients
If you want one program for all your mail, with folders, search, signatures and often a calendar, a desktop client is the natural choice. Mailbird and eM Client are well-known commercial options, Thunderbird is free and open source, and Microsoft's own Outlook for Windows can add other accounts, such as Gmail, next to Outlook. The downside is the same for all of them: you go to the app, and the app is a whole workspace.
Coming from Mailbird? See TopDock vs Mailbird.
Web-app workspaces
Wavebox, Shift and Rambox take the web apps you already use and organise them in one window with a sidebar, profiles and notifications. They're a strong fit if your day happens in a dozen web apps and you want them out of your main browser. Because they run the real web apps, you get every feature of Gmail or Slack, along with the memory use that comes with them.
Comparing with Wavebox? See TopDock vs Wavebox.
Gmail wrappers and browser extensions
If Gmail is your only inbox, a lighter tool might be all you need. A wrapper like Kiwi for Gmail gives Gmail its own window. An extension like Checker Plus for Gmail shows a count in the toolbar and lets you read and reply from a pop-up. Both are well-liked. The limits are scope (mostly Gmail) and, for extensions, the browser has to be running.
Using an extension today? See TopDock vs Checker Plus for Gmail.
Where TopDock fits
TopDock is for people whose problem isn't "I need a better email client" but "I check too many places too often". It adds a slim bar to the top of your Windows screen with a tile per inbox: Gmail, Outlook, X, Reddit, a LinkedIn tile for posting, and a todo list. A badge shows what's new. You click, read, reply or archive, and press Esc.
- Several Gmail and Outlook inboxes, separate or combined
- X mentions and Reddit replies without the feed
- Turn any message into a todo with one key
- No TopDock server; sign-ins kept in Windows Credential Manager
When TopDock isn't the right choice
- You need a calendar, contacts or advanced rules in the same app. Use a desktop client.
- You want Slack, WhatsApp or Teams in the same place. A web-app workspace covers those; TopDock doesn't.
- You're on a Mac or Linux. TopDock is Windows 10 and 11 only.
- You want posts scheduled or sent automatically. TopDock never posts for you.
Plenty of people use both: a full client for long email sessions and TopDock for the quick checks in between.