Top Alternatives to O&O Defrag

Defraggler is a free disk defragment tool.

Auslogics Disk Defrag is a freemium software application for Microsoft Windows intended to defragment files and folders on a hard drive, consolidate free space.

MyDefrag or JkDefrag is a freeware disk defragmenting utility for Windows.

UltraDefrag is an open-source disk defragmenting utility for Microsoft Windows.

IObit Smart Defrag optimizes PC to take full advantage of SSD performance while defragmenting hard disks.

PerfectDisk is a defragmentation utility for Windows.

Disk Defragmenter is a utility in Microsoft Windows designed to increase access speed by rearranging files stored on a disk to occupy contiguous storage locations, a technique called defragmentation.

System Mechanic is a software designed to repair, optimize, and protect Windows PCs.

Condusiv Diskeeper fixes worst performing physical servers or PCs with faster than new performance.

Puran Defrag is a disk defragmentaion software.

WinContig is an easy-to-use stand-alone defragmentation tool that doesn't create any installation directories or Registry entries on your computer.