Comparison of defragmentation software

! Program

! Developer

! License

! Supported file systems

! Supported platforms

! GUI

! CLI

! Script

! Scheduler

! Boot time

! Auto defrag when idle

! Stable release

| Auslogics

| {{Nonfree|Freeware}}

| FAT16, FAT32, NTFS

| Windows XP and later

| {{Yes}}

| {{Yes}}

|

| {{Yes}}

| {{Yes}}

| {{Yes}}

| {{Latest stable software release/Auslogics Disk Defrag}}

| AVG Technologies

| {{Nonfree|Trialware}}

|

|

|

|

|

|

|

|

| 2015 (v15.0.1001.238) (November 30, 2014)

| Microsoft

| {{Nonfree|Freeware }}

| NTFS

| Windows XP and later;
Windows Server 2003 and later

| {{No}}{{Cite web|title=Contig v1.8|url=https://technet.microsoft.com/en-us/sysinternals/bb897428.aspx|first=Mark|last=Russinovich|publisher=Microsoft|work=Windows Sysinternals|date=July 4, 2016|accessdate=June 9, 2011}}

| {{Yes}}

| {{No}}

| {{Yes|Yes, with Windows Task Scheduler}}

| {{No}}

| {{Yes|Yes, with Windows Task Scheduler}}{{efn|name="ScheduleIdle"|Windows Task Scheduler "Idle" schedules and options settings will be applied to scheduled tasks.}}

| 1.8 (July 4, 2016)

| Piriform

| {{Nonfree|Freeware }}

| FAT32, NTFS, exFAT, ReFS{{cite web|title=Defraggler - Version History|url=https://www.piriform.com/defraggler/version-history|website=Prirform|accessdate=July 21, 2015}}

| Windows XP and later

| {{Yes}}

| {{Yes}}

| {{No}}

| {{Yes|Yes, with Windows Task Scheduler}}{{efn|Defraggler's GUI only provides an interface to configure defragmenting activity in Windows Task Scheduler.{{Cite web |title=Scheduler |url=http://www.piriform.com/docs/defraggler/defraggler-settings/scheduler |publisher=Piriform |work=Piriform.com |accessdate=December 13, 2013}}}}

| {{Yes}}

| {{Yes|Yes, with Windows Task Scheduler}}{{efn|name="ScheduleIdle"}}

| {{Latest stable software release/Defraggler}}

| Microsoft

| {{Needs|Bundled with Microsoft Windows}}

| FAT16, FAT32, NTFS, ReFS

| Windows 2000 and later;
Windows 95 and later

| {{Yes}}

| {{Yes}}

| {{Yes}}

| {{Yes|Yes, with Windows Task Scheduler}}

| {{No}}

| {{No}}

| Same as Windows

| Condusiv Technologies

| {{dropped|Discontinued (formerly trialware}}

| FAT16, FAT32, NTFS

| Windows XP and later

| {{Yes}}{{Cite journal|title=Defraggers|url=https://www.pcmag.com/article2/0,2817,1811972,00.asp|first=Richard|last=Dragan|publisher=Ziff Davis|journal=PC Magazine|date=May 4, 2005|accessdate=November 22, 2010}}

| {{Yes}}{{Cite web|title=DKService.exe: What is it? Discover Defrag Components & More|url=http://www.condusiv.com/defrag/dkservice/|publisher=Condusiv Technologies|accessdate=July 25, 2012}}

| {{Yes}}{{Cite web|title=Group Policy Setup for Condusiv Technologies Products |url=http://files.diskeeper.com/pdf/Diskeeper_Corporation_Group_Policy_Config.pdf|publisher=Condusiv Technologies|year=2007|accessdate=July 25, 2012|page=1}}

| {{Yes}}{{efn|Condusiv Technologies claims its InvisiTasking technology eliminates the need for scheduled defragmentation.}}

| {{Yes}}{{Cite web|title=New Boot-Time Defrag in Diskeeper (2008/2009)|url=http://www.condusiv.com/blog/post/2009/02/03/New-Bootime-Defrag-in-Diskeeper-(20082009).aspx|publisher=Condusiv Technologies|date=February 3, 2009|accessdate=July 25, 2012}}

| {{Yes}}

| {{Latest stable software release/Diskeeper}}

| Jeroen Kessels

| {{Free|GNU GPL}}

| FAT & NTFS

| Windows 2000, Windows XP, Windows Vista

| {{Yes}}

| {{Yes}}

|

|

|

|

| 3.36.0.2 / August 31, 2008

| O&O Software

| {{Nonfree|Trialware}}

| FAT16, FAT32, NTFS, exFAT, ReFS

| Windows NT 4.0, 2000, XP, Vista, 7, 8.x, 10, 11. Server 2003, 2008, 2012, 2016, 2019, 2022

| {{Yes}}

| {{Yes}}

| {{Yes}}

| {{Yes}}

| {{Yes}}

| {{Yes}}

| {{Latest stable software release/O&O Defrag}}

| Microsoft

| {{Nonfree|Freeware}}

| FAT16, FAT32, NTFS

| Windows 2000, XP

| {{No}}

| {{No}}

| {{No}}

| {{No}}

| {{Yes}}

| {{No}}

|

| Raxco

| {{dropped|Discontinued (formerly trialware}}

|FAT16, FAT32, exFAT, NTFS, ReFS* and CSVFS{{ cite web| url=https://raxco.my.salesforce.com/_ui/selfservice/pkb/PublicKnowledgeSolution/d?orgId=00D30000001FVTK&id=50130000000irUt&retURL=%2Fsol%2Fpublic%2Fsolutionbrowser.jsp%3Fsearch%3Dexfat%26cid%3D000000000000000%26orgId%3D00D30000001FVTK%26t%3D4&ps=1 | title=PerfectDisk System Requirements | access-date=2024-03-19}}

|Windows XP SP3 or higher (x86, x64), Windows 10, Windows Server 2003 SP1, Windows Server 2019

|{{Yes}}

|{{Partial|Enterprise Console edition only}}

|

|{{Yes}}

|{{Yes}}

|{{Yes}}

|PerfectDisk 14 Build 900 (2021){{Cite web|url=http://update.raxco.com/pub/download/pd140/client/whatsnew.htm|title=Changelogs|access-date=May 2, 2019}}

| DiskTrix

| {{Nonfree|Trialware}}{{Cite web|title=Download UltimateDefrag Free Public Domain Edition|url=http://www.pcworld.com/product/950263/ultimatedefrag-free-public-domain-edition.html|publisher=PCWorld|accessdate=April 9, 2013}}

| FAT32, NTFS

| Windows XP and later

| {{Yes}}

|{{Yes}}

|

| {{Yes}}

| {{Yes}}

|

| 6.1.2.0 (28 July 2021)

| Dmitri Arkhangelski, Justin Dearing, Sayem Chaklader, Stefan Pendl

| {{Nonfree|Commercial software}} (8.0+) / GNU GPL (7.1.x)

| FAT12, FAT16, FAT32, NTFS, exFAT, ReFS{{cite web|url=http://ultradefrag.sourceforge.net/en/index.html#features|title=UltraDefrag - An Open Source Defragmenter|website=ultradefrag.sourceforge.net|accessdate=May 4, 2018}}

| Windows NT 4.0 and later

| {{Yes}}

| {{Yes}}

| {{Yes}}{{efn|UltraDefrag can be run in batch scripts and apply several parameters separately for each disk.}}[http://ultradefrag.sourceforge.net/en/index.html?download#documentation UltraDefrag documentation] and [https://downloads.sourceforge.net/ultradefrag/UltraDefrag_Handbook_5.0.4_letter.pdf UltraDefrag 5.0.4 handbook]

| {{Yes|Yes, with Windows Task Scheduler}}

| {{Yes}}

| {{Yes|Yes, with Windows Task Scheduler}}{{efn|name="ScheduleIdle"}}

| {{Latest stable software release/UltraDefrag}}, Open source version discontinued[https://sourceforge.net/p/ultradefrag/news/2018/09/ultradefrag-710-and-800-have-been-released/ SourceForge comment citation]

| GoldenBow (or DataTuna)which makes available Howard Barry Emerson's VOPT on their own site, at {{cite web

|url=https://www.disktuna.com/where-did-the-vopt-defragger-go

|title=The excellent VOPT defrag. Free license!|date=21 April 2017 }}

| {{dropped|Discontinued (formerly freeware)}}

| FAT32, NTFS

| Windows 2000 and later

| {{Yes}}

|

|

| {{Yes}}

|

|

| {{Latest stable software release/Vopt}}

! Program

! Developer

! License

! Supported file systems

! Supported platforms

! GUI

! CLI

! Script

! Scheduler

! Boot time

! Auto defrag when idle

! Stable release