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MacKeeper vs Mac Sai: catalog facts
MacKeeper	Mac Sai
Paid Paid subscription, frequently offered at a discount.	Free Free and open source.
macOS	macOS
Cleanup, antivirus and ad blocking in one app Duplicate and junk file finder	Cleaner, optimizer and malware scanner in one app Apple-notarized builds
Mac only Closed source subscription software	macOS only Young project from a single maintainer
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it 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.