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Head-to-head · Duplicate File Finders

AllDup vs CloneSpy

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score AllDup #1 in Duplicate File Finders 9.0/10 Free plan Free plan✓ 4 of 4 features Visit AllDup
CloneSpy #18 in Duplicate File Finders 6.8/10 Free plan Free plan✓ 2 of 4 features Visit CloneSpy

AllDup leads on 0 checks, CloneSpy on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreAllDup · 9.0/10
  • Free planboth
  • Most featuresAllDup · 4 of 4

AllDup scores higher on our rubric for duplicate file finders: 9.0 against 6.8 out of 10; our editors rank them #1 and #18.

AllDup is the better fit for windows users wanting a fully free finder. CloneSpy is the better fit for free Windows users needing link management.

  • AllDup fits best

    Windows users wanting a fully free finder

  • CloneSpy fits best

    Free Windows users needing link management

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Side by side

Feature AllDup 9.0/10 Visit ↗ CloneSpy 6.8/10 Visit ↗
At a glance
Editor score 9.0 6.8
Ranking #1 in Duplicate File Finders #18 in Duplicate File Finders
Best for Windows users wanting a fully free finder Free Windows users needing link management
Pricing model Free Free
Starting price Free plan Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop Desktop
Platforms Windows Windows
Features AllDup 4/4 · CloneSpy 2/4
File preview ✓ (best) Not checked yet
Automatic selection ✓ ✓
Recycle Bin / Trash ✓ (best) Not checked yet
Folder exclusions ✓ ✓
Specs
Platform coverage Windows Windows
Scan locations local drives and storage media; network paths and shares; archive files including ZIP, RAR, and 7Z Selected local folders and files; checksum files made from DVDs or hard drives can be used for comparisons.
Match methods file content; image similarity; sound similarity; filename; file size; modification or creation date; file attributes; hard links; video or sound duration Binary content comparison; file name, title or extension; same name or title with similar size; zero-byte status.
Our review
Pros
  • Matches files by content, names, metadata, media similarity, and duration
  • Scans local storage, network paths, and ZIP, RAR, and 7Z archives
  • Previews results and automates selection before sending files to Recycle Bin
  • Compares identical contents regardless of filename, date, time, or location
  • Supports DVDs, network drives, checksum files, and local storage
  • Replaces redundant files with shortcuts or NTFS hard links
Cons
  • Available only for Windows
  • Does not include AI features
  • Integrations focus on Windows media and document applications
  • Windows-only platform coverage
  • Published version 3.43 dates to 2019
  • Less focused on media-oriented duplicate management
Our verdict

AllDup is a free Windows utility for locating and managing duplicate files across local drives, storage media, network paths, and supported archive files. It suits Windows users who want broad control without a paid plan, including private…

Read the review →

CloneSpy is a free Windows utility for locating duplicate and zero-length files across local folders and hard drives, DVDs, network drives, and checksum files. It suits Windows users who want detailed control over how duplicates are…

Read the review →
  1. AllDupDuplicate File Finders 9.0Free plan
  2. CloneSpyDuplicate File Finders 6.8Free plan

Strengths and trade-offs

  • AllDup — where it wins

    • Matches files by content, names, metadata, media similarity, and duration
    • Scans local storage, network paths, and ZIP, RAR, and 7Z archives
    • Previews results and automates selection before sending files to Recycle Bin

    Where it doesn't

    • Available only for Windows
    • Does not include AI features
    • Integrations focus on Windows media and document applications

  • CloneSpy — where it wins

    • Compares identical contents regardless of filename, date, time, or location
    • Supports DVDs, network drives, checksum files, and local storage
    • Replaces redundant files with shortcuts or NTFS hard links

    Where it doesn't

    • Windows-only platform coverage
    • Published version 3.43 dates to 2019
    • Less focused on media-oriented duplicate management

More comparisons

All duplicate file finders comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update