Best Disk Defragmentation Software in 2026
Updated
In short: IObit Uninstaller is ranked #1 of 22 as of 4 October 2026, ahead of Auslogics Driver Updater and Btrfsmaintenance. The best-ranked option with a free plan is Auslogics Driver Updater. The lowest first paid tier on this page is IObit Uninstaller at $1.23/mo.
For a Windows setup where drive organization matters, compare defragmentation options by the drives and filesystems they support and the optimization controls they offer. The listed criteria include automatic, scheduled, and boot-time optimization, plus maximum drive count. IObit Uninstaller and O&O AppBuster appear at the top, followed by Auslogics Driver Updater and Disk SpeedUp; DiskTuna, Puran Defrag, and WinContig are also near the start of the ranking. Check each entry against the drive types and filesystem support relevant to your setup. Free-plan availability and paid-from pricing can help frame the cost comparison alongside the listed optimization features.
22 disk defragmentation software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Disk Defragmentation Software, one module each. A lit port is something its maker publishes; 0 of the 22 on this page have a public API.
- 01 IObit Uninstaller API not on recordOSS not on recordFREE yesDOCS 6.0$1.23/mo
- 02 Auslogics Driver Updater API not on recordOSS not on recordFREE yesDOCS 5.7Free
- 03 Btrfsmaintenance API not on recordOSS not on recordFREE yesDOCS 5.7Free
- 04 Disk SpeedUp API not on recordOSS not on recordFREE yesDOCS 5.7Free
- 05 Puran Defrag API not on recordOSS not on recordFREE yesDOCS 5.7Free
- 06 WinContig API not on recordOSS not on recordFREE yesDOCS 5.7Free
- 07 IObit Smart Defrag API not on recordOSS not on recordFREE yesDOCS 5.6$1.67/mo
- 08 O&O AppBuster API not on recordOSS not on recordFREE not on recordDOCS 5.4
- 09 DiskTuna API not on recordOSS not on recordFREE not on recordDOCS 5.3
- 10 DymaxIO API not on recordOSS not on recordFREE not on recordDOCS 5.3$5.75/mo
- 11 Defraginator API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 12 Microsoft Quick Assist API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 13 UltimateDefrag 6 API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 14 UltraDefrag API not on recordOSS not on recordFREE not on recordDOCS 5.2
- 15 Windows Backup API not on recordOSS not on recordFREE not on recordDOCS 5.1
- 16 Autoruns API not on recordOSS not on recordFREE not on recordDOCS 5.0
- 17 O&O Defrag API not on recordOSS not on recordFREE not on recordDOCS 5.0
- 18 Shake API not on recordOSS not on recordFREE not on recordDOCS 4.8
- 19 Defragger API not on recordOSS not on recordFREE not on recordDOCS 4.7Free
- 20 e4defrag API not on recordOSS not on recordFREE not on recordDOCS 4.7Free
- 21 FreeDOS Defrag API not on recordOSS not on recordFREE not on recordDOCS 4.7
- 22 xfs_fsr API not on recordOSS not on recordFREE not on recordDOCS 4.7
Is your platform on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which disk defragmentation software is ranked first on Inferse?
IObit Uninstaller is ranked #1 of 22 with a score of 6.0. Auslogics Driver Updater is second and Btrfsmaintenance third.
How many of these have a free plan?
9 of the 22 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, IObit Uninstaller has the lowest first paid tier we found: $1.23/mo.
How is this list ranked?
Ranked on what each maker publishes, open and connectable first: a public API, open-source code, the depth of its documentation and a free tier to try it on. Model lists are sorted by the figure in their title, exactly as each provider publishes it. Paid placements never change a rank.