O&O Defrag vs UltraDefrag
| O&O Defrag | UltraDefrag | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Windows | Windows |
| Free plan | No | No |
| Paid from | 49.95 one-time | — |
| Drive types | both | both |
| Scheduled optimization | Yes | Yes |
| Automatic optimization | Yes | Yes |
| Boot-time optimization | Yes | Yes |
| Filesystem support | multi-filesystem | multi-filesystem |
Both are listed in Best Disk Defragmentation Software. On Samsung Mobile US Press, UltraDefrag scores higher on our published basis.