Comparison of defragmentation software

The following is a comparison of notable file system defragmentation software:

Program Developer License Supported file systems Supported platforms GUI CLI Script Scheduler Boot time Auto defrag when idle Stable release
Auslogics Disk Defrag Auslogics Freeware FAT16, FAT32, NTFS Windows XP and later Yes Yes Yes Yes Yes 9.5.0.2 (Free), 4.11.0.7 (Ultimate) (unknown date (unknown date) (Free), March 3, 2020 (2020-03-03) (Ultimate)) [±]
AVG PC TuneUp AVG Technologies Trialware 2015 (v15.0.1001.238) (November 30, 2014)
Contig Microsoft Freeware NTFS Windows XP and later;
Windows Server 2003 and later		 No[1] Yes No Yes, with Windows Task Scheduler No Yes, with Windows Task Scheduler[lower-alpha 1] 1.8 (July 4, 2016)[1]
Defraggler Piriform Freeware FAT32, NTFS, exFAT, ReFS[2] Windows XP and later Yes Yes No Yes, with Windows Task Scheduler[lower-alpha 2] Yes Yes, with Windows Task Scheduler[lower-alpha 1] 2.22.995 [4] (May 22, 2018 (2018-05-22)) [±]
Microsoft Drive Optimizer (formerly Disk Defragmenter) Microsoft Bundled with Microsoft Windows FAT16, FAT32, NTFS, ReFS Windows 2000 and later;
Windows 95 and later		 Yes Yes Yes Yes; via Security and Maintenance No Yes; via Security and Maintenance Same as Windows
Diskeeper Condusiv Technologies Trialware FAT16, FAT32, NTFS Windows XP and later Yes[5] Yes[6] Yes[7] Yes[lower-alpha 3] Yes[8] Yes 2018 (18.0.1226.0) (March 28, 2018 (2018-03-28)) [±]
JkDefrag Jeroen Kessels GNU GPL FAT & NTFS Windows 2000, Windows XP, Windows Vista Yes Yes 3.36.0.2 / August 31, 2008
MyDefrag Jeroen Kessels Freeware FAT16, FAT32, NTFS.

Does not work at all on ExFAT

 Windows 2000, XP, Vista, 7.

Unofficial: Windows 8.0, 8.1, 10.

 Yes Partial [lower-alpha 4] Yes !! [lower-alpha 5] Partial, Not in GUI. [lower-alpha 6] No No 4.3.1 / May 20, 2010
O&O Defrag O&O Software Trialware FAT16, FAT32, NTFS Windows 2000, XP, Vista, Server 2008, 7, and 8 Yes Yes Yes Yes Yes 22.1.2521 (January 15, 2019) [±]
PageDefrag Microsoft Freeware
PerfectDisk 14 Raxco Trialware FAT16, FAT32, exFAT, NTFS, ReFS* and CSVFS Windows XP SP3 or higher (x86, x64),Windows 10, Windows Server 2003 SP1,Windows Server 2019 Yes Yes(Enterprise Console Edition Only) Yes Yes Yes PerfectDisk 14 Build 894(May 2, 2019)[9]
UltimateDefrag DiskTrix Trialware[10] FAT32, NTFS Windows XP and later Yes Yes Yes Yes 6.0.50.0 (13 December 2019)
UltraDefrag Dmitri Arkhangelski, Justin Dearing, Sayem Chaklader, Stefan Pendl Commercial software (8.0) / GNU GPL (7.1.x) FAT12, FAT16, FAT32, NTFS, exFAT[11] Windows NT 4.0 and later Yes Yes Yes[lower-alpha 7][12] Yes, with Windows Task Scheduler Yes Yes, with Windows Task Scheduler[lower-alpha 1] 9.0.1 (October 20, 2019 (2019-10-20)) [±], Open source version discontinued[13]
Vopt GoldenBow (or DataTuna)[14] Discontinued (formerly freeware) FAT32, NTFS Windows 2000 and later Yes Yes 9.21.0001 (November 14, 2010 (2010-11-14)) [±]
Program Developer License Supported file systems Supported platforms GUI CLI Script Scheduler Boot time Auto defrag when idle Stable release

Notes
  1. Windows Task Scheduler "Idle" schedules and options settings will be applied to scheduled tasks.
  2. Defraggler's GUI only provides an interface to configure defragmenting activity in Windows Task Scheduler.[3]
  3. Condusiv Technologies claims its InvisiTasking technology eliminates the need for scheduled defragmentation.
  4. MyDefrag CLI -- Can execute script via CLI but displays disk map.
  5. MyDefrag Scripts -- Runs exclusively via scripts. Included scripts good enough for most. The open-source predecessor JkDefrag does not have this level of power user script support. Geek-freak custom ultra-optimizing scripts are what distinguishes this defragmenter from the rest.
  6. MyDefrag Scheduler -- Can only add, running specific built-in scripts via installer. Everything else, including all edits and deletes, must be set up manually in Windows task scheduler.
  7. UltraDefrag can be run in batch scripts and apply several parameters separately for each disk.

References
  1. Russinovich, Mark (July 4, 2016). "Contig v1.8". Windows Sysinternals. Microsoft. Retrieved June 9, 2011.
  2. "Defraggler - Version History". Prirform. Retrieved July 21, 2015.
  3. "Scheduler". Piriform.com. Piriform. Retrieved December 13, 2013.
  4. Defraggler version history on piriform.com
  5. Dragan, Richard (May 4, 2005). "Defraggers". PC Magazine. Ziff Davis. Retrieved November 22, 2010.
  6. "DKService.exe: What is it? Discover Defrag Components & More". Condusiv Technologies. Retrieved July 25, 2012.
  7. "Group Policy Setup for Condusiv Technologies Products" (PDF). Condusiv Technologies. 2007. p. 1. Retrieved July 25, 2012.
  8. "New Boot-Time Defrag in Diskeeper (2008/2009)". Condusiv Technologies. February 3, 2009. Retrieved July 25, 2012.
  9. "Changelogs". Retrieved May 2, 2019.
  10. "Download UltimateDefrag Free Public Domain Edition". PCWorld. Retrieved April 9, 2013.
  11. "UltraDefrag - An Open Source Defragmenter". ultradefrag.sourceforge.net. Retrieved May 4, 2018.
  12. UltraDefrag documentation and UltraDefrag 5.0.4 handbook
  13. SourceForge comment citation
  14. which makes available Howard Barry Emerson's VOPT on their own site, at "The excellent VOPT defrag. Free license!".
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