Comparison of defragmentation software explained

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		FAT16, FAT32, NTFS	Windows XP and later
AVG PC TuneUp	AVG Technologies										2015 (v15.0.1001.238) (November 30, 2014)
Contig	Microsoft		NTFS	Windows XP and later; Windows Server 2003 and later	^[1]						1.8 (July 4, 2016)
Defraggler	Piriform		FAT32, NTFS, exFAT, ReFS^[2]	Windows XP and later
Drive Optimizer (formerly Disk Defragmenter)	Microsoft		FAT16, FAT32, NTFS, ReFS	Windows 2000 and later; Windows 95 and later							Same as Windows
Diskeeper	Condusiv Technologies		FAT16, FAT32, NTFS	Windows XP and later	^[3]	^[4]	^[5]		^[6]
JkDefrag	Jeroen Kessels		FAT & NTFS	Windows 2000, Windows XP, Windows Vista							3.36.0.2 / August 31, 2008
O&O Defrag	O&O Software		FAT16, FAT32, NTFS, exFAT, ReFS	Windows NT 4.0, 2000, XP, Vista, 7, 8.x, 10, 11. Server 2003, 2008, 2012, 2016, 2019, 2022
PageDefrag	Microsoft		FAT16, FAT32, NTFS	Windows 2000, XP
PerfectDisk	Raxco		FAT16, FAT32, exFAT, NTFS, ReFS* and CSVFS^[7]	Windows XP SP3 or higher (x86, x64), Windows 10, Windows Server 2003 SP1, Windows Server 2019							PerfectDisk 14 Build 894(May 2, 2019)^[8]
UltimateDefrag	DiskTrix	^[9]	FAT32, NTFS	Windows XP and later							6.1.2.0 (28 July 2021)
UltraDefrag	Dmitri Arkhangelski, Justin Dearing, Sayem Chaklader, Stefan Pendl	(8.0+) / GNU GPL (7.1.x)	FAT12, FAT16, FAT32, NTFS, exFAT, ReFS^[10]	Windows NT 4.0 and later			^[11]				, Open source version discontinued^[12]
Vopt	GoldenBow (or DataTuna)^[13]		FAT32, NTFS	Windows 2000 and later
Program	Developer	License	Supported file systems	Supported platforms	GUI	CLI	Script	Scheduler	Boot time	Auto defrag when idle	Stable release

External links

• The Big Windows 7 Defragmenter Test
• The Big Windows XP Defragmenter Test

Notes and References

1. Web site: Contig v1.8. Mark. Russinovich. Microsoft. Windows Sysinternals. July 4, 2016. June 9, 2011.
2. Web site: Defraggler - Version History. Prirform. July 21, 2015.
3. Defraggers. Richard. Dragan. Ziff Davis. PC Magazine. May 4, 2005. November 22, 2010.
4. Web site: DKService.exe: What is it? Discover Defrag Components & More. Condusiv Technologies. July 25, 2012.
5. Web site: Group Policy Setup for Condusiv Technologies Products . Condusiv Technologies. 2007. July 25, 2012. 1.
6. Web site: New Boot-Time Defrag in Diskeeper (2008/2009). Condusiv Technologies. February 3, 2009. July 25, 2012.
7. Web site: PerfectDisk System Requirements . 2024-03-19.
8. Web site: Changelogs. May 2, 2019.
9. Web site: Download UltimateDefrag Free Public Domain Edition. PCWorld. April 9, 2013.
10. Web site: UltraDefrag - An Open Source Defragmenter. ultradefrag.sourceforge.net. May 4, 2018.
11. http://ultradefrag.sourceforge.net/en/index.html?download#documentation UltraDefrag documentation
12. https://sourceforge.net/p/ultradefrag/news/2018/09/ultradefrag-710-and-800-have-been-released/ SourceForge comment citation
13. which makes available Howard Barry Emerson's VOPT on their own site, at Web site: The excellent VOPT defrag. Free license!.