HDShredder vs Lethe

HDShredder erases hard disks and other mass-storage contents at the physical level, independently of partition layout, file system, and operating system. It can wipe a whole drive, individual partitions, or selected areas, and supports SSDs and removable media. Each package includes a Windows program and a self-booting version with the same interface. SCSI, FireWire, and USB 3.0 are supported in Windows and in the bootable version. The Free Edition securely erases media at up to 6 GB/min and can display supported and recognized drives, though some drives require a higher edition. Standard Edition supports 15 international data-deletion standards, while Professional Edition and higher create detailed deletion reports. A pattern editor allows custom deletion procedures. Professional Edition Portable targets service providers and IT departments using arbitrary PCs, and Enterprise editions offer parallel mass deletion. Prices range from free for Free Edition to €799, paid once for Enterprise Edition 16x. Free-version users are directed to the forum; commercial-product users can open technical-support tickets.

Lethe is a free, open-source command-line utility for wiping drives on Linux, macOS and Windows. It overwrites existing data with randomly generated data or a static pattern, then can read data back to check whether write commands succeeded. The project says it should work with HDDs, flash drives and SSDs, but warns that its current approach cannot reliably erase all SSD data because of wear leveling and compression.

Lethe requires root or administrator access to operate on real drives. It uses a fast cryptographic random generator and lets users override the operating system's recommended block size. It can track and automatically skip bad blocks and other localized errors, though that feature is experimental. Available binaries cover Windows x86-64, Intel macOS, experimental Apple macOS and Linux x86-64; installation from Rust sources is also documented. The project says initial active development is complete, though occasional changes may still be made. Lethe is licensed under Apache License 2.0.