Alternatives to O&O Defrag for all platforms with any license

  • Defraggler

    It differs from other defrag tools on the market, by enabling you to quickly and simply defrag the files you want to, without having to process the whole drive. You can...

    • Bundleware
      VirusTotal returns the following: Win32/Bundled.Toolbar.Google.D potentially unsafe

    Free Personal Windows

    Defraggler icon
  • MyDefrag

    MyDefrag (previously JkDefrag) is a disk defragmenter and optimizer (a maintenance utility to make your harddisk faster) for Windows 2000, 2003, XP, Vista, 2008, Win7...

    • Discontinued
      The official website is no longer available. Last version, 4.3.1, released in May 2010, can be still downloaded from FileHippo

    Free Windows

    MyDefrag icon
  • PerfectDisk

    PerfectDisk is a disk defragmenter with a variety of advanced disk management features. It supports automatic background defragmentation, flexible scheduling options...

    Commercial Windows

    No features added Add a feature

    PerfectDisk icon
  • System Mechanic

    System Mechanic automatically repairs errors and fragmentation, cleans out clutter, and tunes up your PC -- so that it runs smoothly, reliably, and up to 300% faster!...

    Commercial $ $ $ Windows

    System Mechanic icon
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  • Contig

    Contig is a single-file defragmenter that attempts to make files contiguous on disk. Its perfect for quickly optimizing files that are continuously becoming fragmented...

    Free Windows

    No features added Add a feature

    Contig icon
  • Condusiv Diskeeper

    Condusiv's Diskeeper 16 is designed to be an active defragmenter that defrags while idle, but also delays and caches read/writes by using a pool of system RAM (L1...

    • Diskeeper integrates write caching and delayed writes, so small changes are buffered in system RAM, then written to their proper place on the disk when it's idle or not busy instead of on-demand. o&o has better scheduling and location/zone management of bulk or archive files, but both features are handy to have. Diskeeper's caching can be replaced by PrimoCache or SuperCache for hybrid disk "read and write" caching. tolimanMar 2017 Disagree   Agree

    Commercial Windows

    Condusiv Diskeeper icon

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