The best DockDoor alternatives for Mac
DockDoor alternatives compared: Koi's Dock previews, AltTab, HyperDock and macOS's own App Exposé. What each shows, what it costs and which macOS it needs.
Start here
What AltTab does, and what it costs
AltTab brings Windows' alt-tab to the Mac. Where ⌘Tab switches apps, AltTab switches windows: every one, minimized, hidden and on other Spaces, with a badge saying where it is and a big preview of the one you're on. You set your own shortcuts and trackpad gestures.
The core is free and open source (GPL-3.0). Pro adds type to search, more styles and up to 9 shortcuts: $9.99 once for the current version, or $24.99 for Pro Lifetime, with every Pro feature free for 14 days. It needs macOS 12 or later and says it has no tracking and no telemetry. It's updated almost every month.
We make Koi, so read this with that in mind. Koi has no window switcher, and we say where that matters below. Every fact about another app comes from that app's own site, checked October 26, 2026.
The picks
The best AltTab alternatives for Mac in 2026
1. DockDoor
Best for: A switcher and Dock previews in one free app
DockDoor has its own Option-Tab switcher with search, and also shows an app's windows when you point at it in the Dock. Free and open source, macOS 13 or later. More in our DockDoor alternatives.
2. Koi
Best for: Seeing an app's windows from the Dock, with the mouse
Koi isn't a switcher. Rest the pointer on an app in the Dock and its windows on this desktop show above it, minimized ones too. Click one to bring it forward. If you reach for windows with the mouse more than the keyboard, that may be all you need.
Where AltTab is better, plainly: it's free, it's keyboard first, and it shows every window across Spaces. Koi is $20 a month or Lifetime, paid once, with dictation, call recording and an assistant in your notch.
3. ⌘Tab and App Exposé, built in
Best for: Free, already there
⌘Tab switches apps, and ⌘` cycles one app's windows. Control and the down arrow shows all of one app's windows across the screen.
Comparison
AltTab vs the alternatives
| Window switcher | Dock previews | macOS | Price | |
|---|---|---|---|---|
| AltTab | Yes | No | 12+ | Free; Pro $9.99 once |
| DockDoor | Yes | Yes | 13+ | Free |
| Koi | No | Yes | 14+ | $20 a month, or Lifetime, $199 once |
| ⌘Tab, App Exposé | Apps only | Full screen | Built in | Free |
Honest take
When AltTab is still the better pick
Stay on AltTab if
- You switch windows from the keyboard all day.
- You want every window from every Space in one list.
- You want it free, or paid once.
Choosing
Which one should you pick?
- A keyboard switcher? Stay on AltTab, or try DockDoor's.
- Windows from the Dock, with the mouse? DockDoor, or Koi if you want the rest of Koi too.
See Koi's Dock previews, or the plans on the pricing page.
Keep exploring
See an app's windows from the Dock
Rest the pointer on an app in the macOS Dock and Koi shows its windows above it, minimized ones too. Click one to bring it forward. Pictured on your Mac only.
The best HyperDock alternatives for Mac
HyperDock alternatives for newer Macs: DockDoor, Koi's Dock previews, AltTab and App Exposé. Window previews from the Dock, compared with prices.
The best notch apps for MacBook in 2026
The best MacBook notch apps: Boring Notch and Atoll (free), Droppy, Alcove, DynamicLake, MediaMate, NotchDrop, and Koi. Music, AirDrop, battery and more.
Support
Frequently asked questions
Yes, the core is free and open source. Pro is $9.99 once for the current version, or $24.99 for Pro Lifetime.
No. Koi shows an app's windows when you rest the pointer on it in the Dock. For the keyboard, AltTab or DockDoor.
No. Its site lists a keyboard switcher, not Dock previews. DockDoor does both.