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Fileside vs Directory Opus: catalog facts
Fileside	Directory Opus
Paid Paid licence with a free trial.	Paid A paid licence is required after the trial.
Windows, macOS	Windows
Tiled multi-pane layouts saved per project Keyboard palette for jumping between folders	Deeply configurable layouts, toolbars and scripted commands Built-in FTP, archive handling and a very strong batch rename
Paid after the trial No Linux version	Paid licence with no free tier The number of options is overwhelming at first
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.