Comparing Anti-Duplicate Software


There are a few of anti-duplicate sofwares free and paid on the market. Here we will compare them.


Standard 1 folder of videos, 233 GB (2749 files, 22 folders)
1 folder of videos, 8.74 GB (94 files, 1 folders)
Music 1 folder of musics, 76.1 GB (17306 files, 1253 folders)

1 folder of musics, 870 MB (1188 files, 12 folders)

Image I folder of images, 7.21 GB (21918 files, 176 folders)



Result 890 kB of installation, 1.07 MB

12.4 secs, 4 correct results. 1 multiple duplicate


  • Can search on one of two folders or both
  • Can compare file size
  • Can compare by name
  • Can compare content
  • Can set minimum match values
  • Can limit number of duplicate files
  • Can search file
  • Can include or exclude file types

  • Can only choose two folders at the most
    • Limited setting options




Result 2565 kB of installation, 5.44 MB

1 sec, 0 duplicate found (duplicates), 1 duplicate found (same name)


  • Can have two pools, each having many folders
  • Can do CSC
  • Can search for duplicate or same name
  • Can automatically delete without confirmation
  • Can save setting
  • Can include or exclude file types
  • Can ignore folders
  • Can set case-sensitivity
  • Can choose by time and date
  • Can check and delete zero length File
  • Can report to file
  • very quick scanning

  • Not giving satisfactory result in test




Duplicate Cleaner Free

Result 5373 kB of installation, 8.01 MB

28 secs, 0 file found (same content, same size), 55 duplicates (2 false) (ignore content, same size)

Music: 4 secs, 3 duplicates all wrong


  • 32-bit and 64-bit ver
  • Regular, image (PRO), and audio mode
  • Can choose percentage of similarity
  • Can filter file extension
  • Can choose size
  • Can choose date
  • Additional option of similar name and date
  • Can ignore content
  • Can add more than one folders
  • Can move to folder
  • Can choose music based on tag and match
  • Can filter image with different dimensions, rotated, and flipped
  • Can go through zip (this is a pretty rare feature)
  • Nice-looking summary after search is finished with time spent, files and folder searched, and duplicate found

    • More in paid ver. (image, duplicate folders)
    • Thorough searching, but takes pretty long time





Dup Scout

Result 5434 kB of installation, 15.4 MB

1min 1 sec, 0 duplicate found


  • Can replace duplicated files with shortcut and hard link
  • Have shell extension
  • Can compress and move duplicated files
  • Can select oldest and newest-



Auslogic Duplicate Files Finder

Result 16.6 MB

1min 55.5secs, 0 duplicate found

Images: 44secs, 910 duplicates found

Music: 0 sec, 0 duplicate found


  • Can choose more than one folders
  • Can look for file types
  • Can ignore file names and dates
  • Can set delete to type
  • Good for images

    • Limited setting option
    • Limited file types to choose for ‘file types only’
    • In standard  ‘all file types’ giving unsatisfactory result





Duplicate Files Finder

Result 1450kB, 4.54 MB

2 secs, 0 duplicate found (I already deleted the duplicated files)


  • Can set and exclude extension
  • Can set file size
  • Can set zero file

  • GUI is very simple
  • No automatic




Result 2.2 MB

3.3 secs, 0 duplicate found

Music: 1 sec, 0 duplicate found


  • Can set extension
  • Can set minimum and maximum size
  • Can set delete option
  • Can replace deleted option
  • Can delete empty directories
  • Can automark

  • Limited setting options
  • Before was my favourite, now there is paid version
  • Free version limited to 1000 files, 20 duplicates






Result 5.16 MB

Musics   :2 min 49secs, 4 multiple results (1 correct)

Images: 19 min 3ses, 501 duplicates found, less than 10 wrong


  • Can choose multiple folders
  • Good for Audios and Images
  • Have cache, can pause
  • Can control sensitivity
  • including sonogram analysis and spectrum analysis (PAID ver)
  • Image Preview

  • Cannot do other type of files
  • More accurate for paid ver.
  • Sometimes too sensitivem(false positive)





SWMole Clone Remover

Result 4.84 MB

59 secs, 0 duplicate found


  • Can search for email outlook
  • Can search iTunes
  • Image and music option
  • Name option
  • Can search zip and rar
  • Can set sensitivity
  • Can search network drive

  • Unregistered can’t delete more than 20 files
  • Unregistered need to wait 90 secs before entering program
  • Registered version is rather expensive








Update: DupeGuru

Result 16.65 (Standard), 17.13 (Picture Edition)

Standard: 20+ mins, 4126 duplicate found, 740.28 MB (for 66,946 Files, 8,107 Folders, 143 GB, in comparison, Duplicate Cleaner is finding 20 min 10 s, 5845 group, 1.19 GB)

Images: 2 min 40 s , 29 files, 1.01 MB 12 groups (for 13260 files, 191 Folders, 6.95 GB, in  comparison, Duplicate Cleaner is 17min 30 s, 11 groups, 33 files, 523 kb )

Music: 29m 40s >> 13 files, 10 similar, 48.72 MB (for 19,000 Files, 1,302 Folders, 78.5 GB, in comparison Duplicate Cleaner is 57min 37 s,  14 similar, 17 files)


  • There’re separate application for Picture and Music
  • Design-wise it’s pretty simple and straight to the point
  • Multiple folders
  • can choose Image based on contents and exif, also different dimension
  • Can choose folder to ignore
  • Can filter hardness in percentage
  • Can export result to HTML and CSV

  • There’re separate application for Picture and Music
  • Design sometime feels too simple, can make people confused
image image image





My verdict:

  • The best result is from Duplicate Cleaner Free, though if you want fast, I suggest DupeGuru
  • Best for music: Similarity (I think DupeGuru Music Edition is very good as well)
  • Best for image: Auslogic, Similarity. (I think DupeGuru Picture is very good as well)

I still like Duplicate File Finder more (think it’s more accurate. It catches 2 files in picture mode in different dimension, not caught by DupeGuru PE. Still Dupe Guru is crazy fast. 

Side-by-side comparison

More than 2 folders x v v v v v v v v v
Filetype v v v x o v x o v o
Filesize v x v x v v x v v  
Name v v v x o x x v x  
Content v v v v o v v v v v
Percentage v x o x x x v v x v
Date x o v o o x x v v x
Automatic deletion x v o x x o x o x v
Zero size deletion x v v x x v x v v x
Replace duplicate x x x v x v x x x x
Deletion option x v v x v v x v x v


  • AT: Antitwin
  • CS: Clonespy
  • DC: Duplicate Cleaner Free
  • DS: DupScout
  • AL: Auslogic Duplicate Files Finder
  • ND: Nodupe
  • SM: Similarity
  • SW: SWMole Clone Remover
  • DF: Duplicate File Finder
  • DG: DupeGuru

with v: yes, o (somewhat), x (no)

Update: Lifehacker recommends DupeGuru (with Picture and Music edition to boot), but… I haven’t exactly wowed with what I’ve tried (maybe it’s just me). Will do an update for it after I do a thorough research.

Update: Tested it already, comparison with Duplicate File Finder.

About Ky

Currently Indonesian university student trying to submit more useful contents to share one's limited knowledge. Rather has wide, shallow interests, the writings will be as sporadic as it can be. Should write more scientific and field related topics, but writing muse says otherwise. Expect more on technical related writings especially softwares and apps, cultures, music, and random things.

Posted on February 17, 2014, in Plugging, Reviewing and tagged , , , . Bookmark the permalink. Leave a comment.

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