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
Multiple languages Portable Add a feature

583 Like
UltraDefrag

UltraDefrag is a disk defragmenter for Windows. It can quickly defragment everything including files which are usually locked by Windows. For instance, UltraDefrag can...

Commercial $ $ $ Windows
Windows Explorer integration Lightweight Minimalistic Multiple languages ... Portable Add a feature

86 Like
Auslogics Disk Defrag

Disk fragmentation leads to system slowdowns, PC crashes, slow startup and shutdown and sometimes to system failures. Auslogics Disk Defrag is designed for fast...
- Bundleware
  It suggests to change default search engines and start page to Yahoo in web browsers
Free Personal $ $ $ Windows
Portable Shutdown after completing Option Add a feature

168 Like
IObit Smart Defrag

Smart Defrag is a Reliable and Intelligent Disk Defragmenter with Ultra-fast, Stable, Efficient Defrag Engine. Smart Defrag supports deep defragment, defragmentation...
- Bundleware
  The installer may contain adwares. Be careful during the installation: https://alternativeto.net/discussions/applications/11718/be-careful-in-the-installation/
Freemium $ $ $ Windows
No features added Add a feature

68 Like
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
Portable Scripting support Add a feature

93 Like
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

42 Like
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 Cleanup Add a feature

31 Like
WinContig

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

Free Windows
Defrag specific files Defrag specific folders Portable Standalone Add a feature

17 Like
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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

7 Like
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. toliman • Mar 2017
Commercial Windows
Ram caching Add a feature

25 Like