Overwrite vs Strix Disk Cleaner

Overwrite is a macOS utility for sanitizing external drives, USB sticks, and SD cards. Its Mac App Store edition deletes files and overwrites free space through the file system. Overwrite Elite can instead overwrite every block the Mac can address on an external drive, using 1-, 3-, 7-, or 35-pass protocols. Completed wipes produce a locally signed Certificate of Data Erasure; Elite certificates can be checked with a free standalone verifier. Elite also offers optional read-back after a multi-pass Full Disk wipe and prints measured coverage on the certificate. The utility is designed for external and removable media and cannot erase the internal boot drive. Both editions have no accounts, analytics, or crash reporting; Elite makes three disclosed connections, while the App Store edition uses Apple’s StoreKit. The free Preview plan lets users explore drives and app screens but does not include secure wiping or certificates. Annual Pro costs $12.99 per year, Lifetime Pro costs $24.99 once, and Overwrite Elite costs $99 once.

Strix Disk Cleaner is a free tool for permanently wiping whole drives on Windows and Linux. It uses hardware sanitize where possible or multi-pass overwriting, and detects SSDs to recommend hardware sanitization because wear-levelling can make overwriting unreliable. The Windows edition provides a graphical interface and a printable destruction certificate; the Linux edition is a unit-tested command-line eraser. It cannot target individual files: its scope is whole drives. To reduce accidental selection, the system disk and mounted disks are unavailable, and destructive actions require typed confirmation. The tool makes no network calls and requires no account. SHA-256 checksums are published with each release for download verification. Builds are not yet code-signed, so Windows SmartScreen may warn on first run. The Free plan costs nothing and is open-source under the MIT license. The product page links to source code, documentation, and a security guide.