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Clop vs Constrict: catalog facts
Clop	Constrict
Freemium Free to use, with a Clop Pro lifetime licence for 15 euros.	Free Free and open source under the GPL-3.0-or-later.
macOS	Linux
Optimises images automatically when copied Shrinks screen recordings right after recording	Targets an exact output file size automatically Batch compression of multiple videos
macOS 13 or later only Some features require Clop Pro	Steep size reductions can badly hurt quality or fail Speed limited by local hardware
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked October 1, 2026

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