Top Alternatives to O&O Defrag

Defraggler is a free, lightweight hard drive defragmentation tool from Piriform (now Gen Digital). It allows users to defragment their entire drive or target specific files and folders, aiming to improve system performance and load times.

Auslogics Disk Defrag is a freemium software application for Microsoft Windows designed to optimize hard drive performance by defragmenting files, folders, and consolidating free space. It aims to reduce drive access times and improve overall system responsiveness.

MyDefrag, formerly JkDefrag, is a discontinued yet highly effective freeware disk defragmenting utility for Windows. Known for its speed and low resource consumption, it offers robust scripting capabilities for customized defragmentation tasks and can be run portably.

UltraDefrag is a powerful open-source defragmentation tool designed for Microsoft Windows, known for its speed, efficiency, and lightweight footprint. It offers both a graphical user interface and command-line options, making it suitable for both novice and advanced users seeking to optimize their hard drive performance.

Windows Disk Defragmenter is a built-in utility designed to enhance hard drive performance by consolidating fragmented files. It rearranges data to ensure contiguous storage, leading to faster file access and overall system responsiveness.

System Mechanic is a comprehensive PC optimization suite designed to improve speed, stability, and privacy by cleaning up junk files, repairing registry errors, and optimizing system settings for peak performance.

Condusiv Diskeeper is a robust software designed to eliminate performance bottlenecks in physical servers and PCs caused by file fragmentation. It proactively prevents fragmentation, utilizes RAM for faster access, and optimizes system performance for a user experience that feels faster than new.

Puran Defrag is a free disk defragmentation tool designed to optimize hard drive performance by rearranging fragmented files Contiguous blocks. It offers various defragmentation methods and aims to improve system speed and responsiveness.

WinContig is a lightweight, standalone defragmentation tool designed to optimize disk performance without requiring installation. It can specifically target individual files or folders and offers portability, making it ideal for use on removable media.