O&O Defrag vs UltraDefrag

O&O Defrag8.8Visit UltraDefrag8.6Visit

Higher score O&O Defrag #3 in Disk Defragmentation Software 8.8/10 30-day trial Free trial✓ 3 of 3 features Visit O&O Defrag

vs

UltraDefrag #4 in Disk Defragmentation Software 8.6/10 Paid ✓ 3 of 3 features Visit UltraDefrag

• O&O Defrag fits best

  Paid Windows optimization with health checks

• UltraDefrag fits best

  Windows users needing portable and CLI tools

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Side by side

Feature	O&O Defrag 8.8/10 Visit ↗	UltraDefrag 8.6/10 Visit ↗
At a glance
Editor score	8.8	8.6
Ranking	#3 in Disk Defragmentation Software	#4 in Disk Defragmentation Software
Best for	Paid Windows optimization with health checks	Windows users needing portable and CLI tools
Pricing model	Paid	Paid
Starting price	$49.95/device one-time	—
Free plan	—	—
Free trial	30 days	—
Deployment	Desktop	Desktop
Platforms	Windows	Windows
Support	Email, Phone, Docs	Email, Docs · 24/7
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features O&O Defrag 3/3 · UltraDefrag 3/3
Scheduled optimization	✓	✓
Automatic optimization	✓	✓
Boot-time optimization	✓	✓
Specs
Drive types	Both	Both
Filesystem support	Multi-filesystem	Multi-filesystem
Maximum drive count	Not checked yet	Not checked yet
Our review
Pros	Supports HDD defragmentation plus SSD and NVMe optimization Includes scheduling, background automation, and boot-time jobs Adds health monitoring, benchmarking, repair, and disk cleanup	Supports HDDs and SSDs, including TRIM for SSDs Offers scheduled, idle, boot-time, file-level, and CLI operations Includes portable tools and SMART disk health monitoring
Cons	Windows-only software No free plan Professional Edition covers one PC	Paid software with no free plan Windows-only platform support Standard licensing covers up to 3 computers
Our verdict	O&O Defrag is Windows software for analyzing and optimizing storage drives. Professional Edition is aimed at home users and individual workstations, covering traditional hard disks alongside SSD and NVMe storage. Its scope extends beyond… Read the review →	UltraDefrag is disk defragmentation and optimization software for Windows computers and Windows Server systems. It is suited to users who need more control than basic drive maintenance provides, including scheduled or idle automation,… Read the review →

Strengths and trade-offs

• O&O Defrag — where it wins

  • Supports HDD defragmentation plus SSD and NVMe optimization
  • Includes scheduling, background automation, and boot-time jobs
  • Adds health monitoring, benchmarking, repair, and disk cleanup

  Where it doesn't

  • Windows-only software
  • No free plan
  • Professional Edition covers one PC

• UltraDefrag — where it wins

  • Supports HDDs and SSDs, including TRIM for SSDs
  • Offers scheduled, idle, boot-time, file-level, and CLI operations
  • Includes portable tools and SMART disk health monitoring

  Where it doesn't

  • Paid software with no free plan
  • Windows-only platform support
  • Standard licensing covers up to 3 computers

• O&O Defrag8.8/10 · 30-day trial

  A paid Windows optimizer combining drive maintenance, monitoring, and automation.

  Visit O&O DefragFull verdict →
• UltraDefrag8.6/10 · Paid

  A Windows-focused optimizer with automation, boot-time jobs, CLI access, and portable tools.

  Visit UltraDefragFull verdict →