Alternatives · Windows & Launchers
SizeUp alternatives
As of Nov 12, 2026, the highest-graded SizeUp alternative is Rectangle (2.8 GPA). It's also the best free one.
SizeUp compared with 5 alternatives: Magnet, Rectangle, Moom, Divvy and Mosaic.
SizeUp is a paid product with a free trial, starting at $12.99. 1 of the 5 alternatives is free or has a free plan. 3 more offer a free trial.
Listings checked up to Nov 12, 2026 · Where the facts come from
Black Friday: is there a SizeUp sale?
At a glance
How each one differs from SizeUp
Magnet
Window snapping for Mac by drag, shortcut or menu bar
- Magnet starts at $4.99 one-time purchase (US Mac App Store).
- Magnet can be bought with a one-time purchase.
Suits: Mac users who want simple window snapping for a small one-time price
Rectangle
Free, open-source window snapping for macOS
- Rectangle is free.
- Rectangle has a free plan, which SizeUp lacks.
- Rectangle is open source, according to its own site.
- Rectangle does not cover menu bar app, which SizeUp does.
Suits: Mac users who want window snapping by shortcut or drag at no cost
Moom
Mac window manager with saved layouts, snapping and a palette
- Moom starts at $15 one-time purchase.
- Moom can be bought with a one-time purchase.
Suits: Mac users who rearrange the same windows each time they dock a laptop
Divvy
Window resizing by dragging across a grid, for Mac and Windows
- Divvy starts at $13.99.
- Divvy also lists a Windows app.
- Divvy does not cover menu bar app, which SizeUp does.
Suits: People who want exact window sizes, not just halves and quarters
Mosaic
Drag-and-drop window layouts for the Mac
- Mosaic starts at £14.99 one-time (Standard Edition).
- Mosaic can be bought with a one-time purchase.
- Mosaic does not cover menu bar app, which SizeUp does.
Suits: Mac users who think of layouts as pictures to drop windows on
Limits worth knowing in SizeUp
- Mac only; the page says it is compatible with Mac OS X 10.6 and later, including macOS 14 Sonoma.
- The page does not name any newer macOS release than Sonoma.
Common questions
What are the alternatives to SizeUp?
The alternatives to SizeUp in this directory are Magnet, Rectangle, Moom, Divvy and Mosaic. Each one has a side-by-side comparison with SizeUp.
Is there a free alternative to SizeUp?
Yes. Rectangle is free to use.
Which SizeUp alternatives work on Windows?
The SizeUp listing does not include a Windows app. Divvy lists one.
Is there an open-source alternative to SizeUp?
Rectangle is described as open source on its own site.
When were these prices checked?
Each listing shows its own date. On this page they run from Oct 4, 2026 to Nov 12, 2026. Vendors change prices without notice, so confirm on their site before you buy.