UltraDefrag is an open-source disk defragmenting utility for Microsoft Windows. Developed by Dmitri Arkhangelski and Justin Dearing
License: Open Source
IObit Smart Defrag offers a more user-friendly experience with features like automatic scheduling and SSD optimization, making it ideal for everyday users. In contrast, UltraDefrag is a lightweight, open-source tool suitable for advanced users who prefer a minimalistic approach and command-line capabilities.