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Loop vs SizeUp: catalog facts
Loop	SizeUp
Free Free and open source, with optional donations.	Paid $12.99 licence with an unlimited free trial.
macOS	macOS
Radial menu for picking window positions quickly Keyboard shortcuts as well as mouse-driven selection	Half and quarter screen actions from the keyboard Moves windows between multiple displays
Requires macOS 13 or later macOS only	Stated compatibility ends at macOS 14 Sonoma Mac only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.