Instead of SpaceObServer

Best SpaceObServer Alternatives in 2026

Taken from Disk Space Analyzers, where SpaceObServer is listed too, in the same order.

1. 1 A

   Avidemux

   • Free plan
   • Open source
   • Windows · macOS · Linux · Web
   8.2 Club score
   Visit Facts and plans
2. 2

   WizTree

   WizTree analyzes files and folders on Windows and macOS, presenting their space usage in a visual treemap.

   • Free plan
   • Windows · macOS
   8.1 Club score
   Visit Facts and plans
3. 3

   Disk Usage Analyzer

   Disk Usage Analyzer is a free Linux desktop app for checking disk use and available storage space.

   • Free plan
   • Open source
   • macOS · Linux
   8.1 Club score
   Visit Facts and plans
4. 4

   Filelight

   Filelight scans files and folders and displays disk usage as concentric rings, helping users locate material that may be taking up space.

   • Free plan
   • Windows · Linux
   8.1 Club score
   Visit Facts and plans
5. 5 G

   gdu

   • Free plan
   • Windows · macOS · Linux · Web
   8.1 Club score
   Visit Facts and plans
6. 6 D

   dust

   dust is a free Rust command-line tool for finding where disk space is used.

   • Free plan
   • Open source
   • Windows · macOS · Linux
   8.1 Club score
   Visit Facts and plans
7. 7 T

   TreeMap

   • Free trial
   • Windows · macOS · Linux · Web
   8.1 Club score
   Visit Facts and plans
8. 8 DA

   Disk Analyzer Pro

   Disk Analyzer Pro is desktop software for examining file and folder storage use and finding items to remove.

   • Free plan
   • Windows · macOS
   8.0 Club score
   Visit Facts and plans
9. 9 D

   duvis

   • Free plan
   • Windows · macOS · Linux · Web
   7.9 Club score
   Visit Facts and plans
10. 10 W

    winTrim

    • Free plan
    • Windows · macOS · Linux
    7.9 Club score
    Visit Facts and plans
11. 11 W

    WinDirStat

    WinDirStat is a free, open source disk usage analyzer and cleanup assistant for Microsoft Windows.

    • Free plan
    • Windows
    7.9 Club score
    Visit Facts and plans
12. 12 L

    LumaDisk

    LumaDisk is a disk space analyzer for macOS and Windows that maps files and folders to show what is taking up storage.

    • Free plan
    • Windows · macOS
    7.9 Club score
    Visit Facts and plans
13. 13 F

    FreeSize

    • Free plan
    • Windows · macOS · Linux
    7.9 Club score
    Visit Facts and plans
14. 14 D

    DiskSavvy

    • Free plan
    • Windows
    7.9 Club score
    Visit Facts and plans
15. 15 S

    SpaceMan

    • Free plan
    • Windows · macOS · Linux
    7.9 Club score
    Visit Facts and plans
16. 16 N

    ncdu

    • Free plan
    • Windows · macOS · Linux · Self-hosted
    7.9 Club score
    Visit Facts and plans
17. 17 T

    TreeSize

    TreeSize analyzes files and folders to show how storage is used on Windows desktop systems.

    • Free plan
    • Windows
    7.8 Club score
    Visit Facts and plans
18. 18

    FolderSizes

    FolderSizes is a Windows tool for examining file and folder space use across local and network storage.

    • Free plan
    • Windows
    7.8 Club score
    Visit Facts and plans
19. 19

    eDirStat

    • Windows · macOS · Linux · Web
    7.8 Club score
    Visit Facts and plans
20. 20

    SquirrelDisk

    • Free plan
    • Windows · macOS · Linux
    7.7 Club score
    Visit Facts and plans

The whole list: Disk Space Analyzers