Auslogics Disk Defrag vs UltimateDefrag 6

Auslogics Disk Defrag8.4Visit UltimateDefrag 68.2Visit

Higher score Auslogics Disk Defrag #5 in Disk Defragmentation Software 8.4/10 Free plan Free plan✓ 3 of 3 features Visit Auslogics

vs

UltimateDefrag 6 #6 in Disk Defragmentation Software 8.2/10 Paid ✓ 3 of 3 features Visit UltimateDefrag

• Auslogics Disk Defrag fits best

  Free HDD defragmentation with advanced controls

• UltimateDefrag 6 fits best

  Strategic FAT32 and NTFS optimization

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Side by side

Feature	Auslogics Disk Defrag 8.4/10 Visit ↗	UltimateDefrag 6 8.2/10 Visit ↗
At a glance
Editor score	8.4	8.2
Ranking	#5 in Disk Defragmentation Software	#6 in Disk Defragmentation Software
Best for	Free HDD defragmentation with advanced controls	Strategic FAT32 and NTFS optimization
Pricing model	Free plan + paid	Paid
Starting price	—	$29.95 one-time
Free plan	✓ (best)	—
Free trial	—	—
Money-back guarantee	30 days	30 days
Deployment	Desktop	Desktop
Platforms	Windows	Windows
Built for	Solo, Small business	Solo, Small business
Features Auslogics Disk Defrag 3/3 · UltimateDefrag 6 3/3
Scheduled optimization	✓	✓
Automatic optimization	✓	✓
Boot-time optimization	✓	✓
Specs
Drive types	Hdd	Both
Filesystem support	Ntfs	Multi-filesystem
Maximum drive count	Not checked yet	Not checked yet
Our review
Pros	Free edition includes disk analysis and basic defragmentation Supports scheduled, boot-time, file-level, and free-space optimization Offers portable operation and command-line support	Supports FAT32, NTFS, HDD, SSD, external, and RAID configurations Combines scheduling, automation, boot-time placement, and file-level jobs Includes simulation mode, command-line directory defragmentation, and three-PC licensing
Cons	Windows-only availability limits cross-platform use Designed for HDDs rather than SSD defragmentation Advanced optimization and repair features are in Pro	Windows-only software with no listed support for other platforms The regular license price is a $29.95 one-time purchase The trial operates only in simulation mode and makes no drive changes
Our verdict	Auslogics Disk Defrag is a Windows utility for analyzing, defragmenting, and optimizing hard disk drives. It is aimed at users who want more control than basic manual defragmentation, including scheduled jobs, free-space consolidation,… Read the review →	UltimateDefrag 6 is Windows desktop software for defragmenting and optimizing hard drives and SSDs. It is aimed at users who want more control than a basic drive-maintenance utility, particularly when working with FAT32 or NTFS volumes and… Read the review →

Strengths and trade-offs

• Auslogics Disk Defrag — where it wins

  • Free edition includes disk analysis and basic defragmentation
  • Supports scheduled, boot-time, file-level, and free-space optimization
  • Offers portable operation and command-line support

  Where it doesn't

  • Windows-only availability limits cross-platform use
  • Designed for HDDs rather than SSD defragmentation
  • Advanced optimization and repair features are in Pro

• UltimateDefrag 6 — where it wins

  • Supports FAT32, NTFS, HDD, SSD, external, and RAID configurations
  • Combines scheduling, automation, boot-time placement, and file-level jobs
  • Includes simulation mode, command-line directory defragmentation, and three-PC licensing

  Where it doesn't

  • Windows-only software with no listed support for other platforms
  • The regular license price is a $29.95 one-time purchase
  • The trial operates only in simulation mode and makes no drive changes

• Auslogics Disk Defrag8.4/10 · Free plan

  A Windows HDD defragmenter with analysis, scheduling, and boot-time tools.

  Visit AuslogicsFull verdict →
• UltimateDefrag 68.2/10 · Paid

  A focused Windows optimizer for FAT32, NTFS, HDD, and SSD maintenance.

  Visit UltimateDefragFull verdict →