O&O Defrag
O&O Defrag: A paid Windows optimizer combining drive maintenance, monitoring, and automation. Ranked #3 of 20 in Disk Defragmentation Software by our editors (8.8/10); pricing: 30-day trial; best for paid Windows optimization with health checks.
At a glance
- Editor score8.8 / 10
- Pricing30-day trial
- Best forPaid Windows optimization with health checks
- Free planNo
- Paid from$49.95/device one-time
- Drive typesBoth
- Founded1997 · Berlin, Germany
- Facts checked20 Sep 2026
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
Our verdict on O&O Defrag
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 defragmentation, with drive monitoring, performance benchmarking, consistency checks, repair functions, reports, and integrated disk cleanup.
Professional Edition costs $49.95 as a one-time purchase for 1 PC. The published plan specifies “Buy once, use always” and no subscription, with compatibility for Windows 10 and 11. A 30-day free trial is available, giving prospective buyers a way to assess the software before purchasing. The pricing structure suits users who prefer a perpetual license over recurring payments, but it is less suitable for anyone seeking a free disk optimization tool or coverage for multiple PCs under one license.
The feature set is broad for users who want ongoing drive maintenance rather than occasional manual defragmentation. Automatic background optimization and scheduled jobs can handle recurring maintenance, while boot-time optimization addresses jobs that require work before Windows fully starts. Drive health monitoring, O&O SpeedCheck benchmarking, consistency checks, repair, and cleanup add diagnostic and maintenance functions in the same application. Choose O&O Defrag for a paid Windows workstation tool spanning HDDs, SSDs, and NVMe drives. Users on other operating systems, or those prioritizing a free solution, should choose an alternative.
Your product? Our editors can test O&O Defrag in depth and publish a review, labelled as paid · from $149/mo →
O&O Defrag pricing
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O&O Defrag fact sheet
| Free plan | No |
|---|---|
| Paid from | $49.95/device one-time |
| Drive types | Both |
| Scheduled optimization | Yes |
| Automatic optimization | Yes |
| Boot-time optimization | Yes |
| Filesystem support | Multi-filesystem |
| Maximum drive count | Not verified |
| Free trial | 30 days |
| Money-back guarantee | 30 days |
| Deployment | Desktop |
| Platforms | Windows |
| Support | Email, Phone, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | 30-day trial (source) |
| Website | oo-software.com |
| Facts checked | 20 Sep 2026 |
Alternatives to O&O Defrag
- IObit Smart DefragA Windows-focused optimizer with free defragmentation and paid automation features.9.4
- Disk SpeedUpA free Windows tool for HDD and SSD analysis, defragmentation, and optimization.9.2
- UltraDefragA Windows-focused optimizer with automation, boot-time jobs, CLI access, and portable tools.8.6
See all O&O Defrag alternatives →
O&O Defrag vs the competition
- O&O Defrag vs IObit Smart Defrag
- O&O Defrag vs Disk SpeedUp
- O&O Defrag vs UltraDefrag
- O&O Defrag vs Auslogics Disk Defrag
- O&O Defrag vs UltimateDefrag 6
- O&O Defrag vs Puran Defrag
Compare O&O Defrag with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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