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Clop alternatives: 2 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave Clop: mac only, and requires macOS 14 Sonoma or later, and free version caps folder and drop-zone optimisation at 5 files per session. We ranked 2 alternatives by how directly each one replaces Clop, then by reviews, real visits and how recently each app's facts were checked against its own website. ImageOptim currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1ImageOptim logoImageOptimOpen sourceYesmacOS4 of 466.5
2Caesium Image Compressor logoCaesium Image CompressorOpen sourceYesWindows, macOS, Web5 of 559.6
  1. ImageOptim logo

    1. ImageOptimTop pick

    Best for: Mac users who want a free drag-and-drop compressor for web and app images

    Open sourcemacOS

    66.5

    score / 100

    Why switch from Clop

    Free, open-source Mac compressor with drag and drop and metadata stripping, without a Pro tier.

    Pros

    • Free and open source, with no limits on files
    • Combines several best-in-class optimisers automatically
    • Strips GPS and camera metadata for privacy

    Cons

    • Mac only
    • Can be slow on large PNGs with Zopfli and PNGOUT enabled
    • No WebP or AVIF conversion in the Mac app
    Visit ImageOptim Details and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is ImageOptim a good Clop alternative?

    Verified facts

    4 of 4 verified
    License
    GPL-2.0
    Checked Nov 1, 2026github.com(opens source in a new tab)
    Requirements
    macOS 11 or later
    Checked Nov 1, 2026imageoptim.com(opens source in a new tab)
    Bundled optimisers
    MozJPEG, pngquant, Pngcrush and more
    Checked Nov 1, 2026imageoptim.com(opens source in a new tab)
    Mac App Store
    Not available
    Checked Nov 1, 2026imageoptim.com(opens source in a new tab)
  2. Caesium Image Compressor logo

    2. Caesium Image Compressor

    Best for: People who need to batch-compress folders of photos for free on Windows or Mac

    Open sourceWindows, macOS, Web

    59.6

    score / 100

    Why switch from Clop

    Free open-source batch image compressor for Mac and Windows with no file limits.

    Pros

    • Free and open source with no file limits
    • Batch processing of whole folders with structure preserved
    • Real-time preview before compressing

    Cons

    • No official Linux build on the download page
    • Interface is functional rather than polished
    Visit Caesium Image Compressor Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Caesium Image Compressor a good Clop alternative?

    Verified facts

    5 of 5 verified
    License
    GPL-3.0
    Checked Oct 29, 2026github.com(opens source in a new tab)
    Formats
    JPG, PNG, WebP, TIFF
    Checked Oct 29, 2026github.com(opens source in a new tab)
    Windows
    Windows 10 (1809) or later
    Checked Oct 29, 2026saerasoft.com(opens source in a new tab)
    macOS
    macOS 12 or later
    Checked Oct 29, 2026saerasoft.com(opens source in a new tab)
    Command line
    Yes
    Checked Oct 29, 2026saerasoft.com(opens source in a new tab)

The best Clop alternative for…

The highest-ranked app in this list for each need.

ImageOptim logo

Best Clop alternative for most people

ImageOptim

Free, open-source Mac compressor with drag and drop and metadata stripping, without a Pro tier.

Caesium Image Compressor logo

Best Clop alternative for a free option

Caesium Image Compressor

Free open-source batch image compressor for Mac and Windows with no file limits.

ImageOptim logo

Best Clop alternative for open source

ImageOptim

Free, open-source Mac compressor with drag and drop and metadata stripping, without a Pro tier.

ImageOptim logo

Best Clop alternative for Mac

ImageOptim

Free, open-source Mac compressor with drag and drop and metadata stripping, without a Pro tier.

Caesium Image Compressor logo

Best Clop alternative for Windows

Caesium Image Compressor

Free open-source batch image compressor for Mac and Windows with no file limits.

Caesium Image Compressor logo

Best Clop alternative for working in the browser

Caesium Image Compressor

Free open-source batch image compressor for Mac and Windows with no file limits.

Clop alternatives: common questions

What is the best alternative to Clop?

ImageOptim ranks first right now. Free, open-source Mac compressor with drag and drop and metadata stripping, without a Pro tier.

Is there a free alternative to Clop?

Yes. ImageOptim (open source) and Caesium Image Compressor (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Clop?

Yes: ImageOptim and Caesium Image Compressor.

Why do people switch from Clop?

The complaints we hear most: mac only, and requires macOS 14 Sonoma or later; free version caps folder and drop-zone optimisation at 5 files per session; closed source, unlike ImageOptim or Caesium.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Clop, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.