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Horos alternatives: 4 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave Horos: macOS only, and not certified for clinical diagnosis. We ranked 4 alternatives by how directly each one replaces Horos, then by reviews, real visits and how recently each app's facts were checked against its own website. Weasis currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1OsiriX MD logoOsiriX MDPaidNomacOS, iOS4 of 454.5
  1. OsiriX MD logo

    1. OsiriX MDTop pick

    Best for: Radiologists and clinics on Macs who need a certified DICOM workstation

    PaidmacOS, iOS

    54.5

    score / 100

    Why switch from Horos

    The commercial original Horos was forked from, with FDA clearance and faster performance for clinical reading.

    Pros

    • FDA-cleared and CE-labelled for diagnostic use
    • Deep 2D, 3D and 4D post-processing, including PET-CT
    • Plugin system for custom research tools

    Cons

    • Runs only on Apple hardware
    • Subscription pricing adds up compared with free viewers
    • Free Lite version marks images as not for medical use
    Visit OsiriX MD Details and reviews
    How this score is calculated
    Editorial fit ×0.360
    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 OsiriX MD a good Horos alternative?

    Verified facts

    4 of 4 verified
    Starting price
    $69.99/month
    Checked Oct 29, 2026osirix-viewer.com(opens source in a new tab)
    Certification
    FDA Class II, CE IIa
    Checked Oct 29, 2026osirix-viewer.com(opens source in a new tab)
    Platforms
    macOS only
    Checked Oct 29, 2026osirix-viewer.com(opens source in a new tab)
    Free version
    OsiriX Lite (not for medical use)
    Checked Oct 29, 2026osirix-viewer.com(opens source in a new tab)

The best Horos alternative for…

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

Weasis logo

Best Horos alternative for most people

Weasis

Free, open source and cross-platform, with strong PACS and DICOMweb integration for mixed Mac and PC sites.

3D Slicer logo

Best Horos alternative for a free option

3D Slicer

Free and runs natively on Apple Silicon, with far more segmentation and research tooling.

Weasis logo

Best Horos alternative for open source

Weasis

Free, open source and cross-platform, with strong PACS and DICOMweb integration for mixed Mac and PC sites.

OsiriX MD logo

Best Horos alternative for Mac

OsiriX MD

The commercial original Horos was forked from, with FDA clearance and faster performance for clinical reading.

RadiAnt DICOM Viewer logo

Best Horos alternative for Windows

RadiAnt DICOM Viewer

Fast, simple paid viewer for users who are moving from a Mac to Windows.

Weasis logo

Best Horos alternative for Linux

Weasis

Free, open source and cross-platform, with strong PACS and DICOMweb integration for mixed Mac and PC sites.

Horos alternatives: common questions

What is the best alternative to Horos?

Weasis ranks first right now. Free, open source and cross-platform, with strong PACS and DICOMweb integration for mixed Mac and PC sites. 3D Slicer and RadiAnt DICOM Viewer follow it in our ranking.

Is there a free alternative to Horos?

Yes. Weasis (open source) and 3D Slicer (open source) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Horos?

Yes: Weasis and 3D Slicer.

Which Horos alternatives work on Linux?

Weasis and 3D Slicer run on Linux.

Why do people switch from Horos?

The complaints we hear most: macOS only; not certified for clinical diagnosis; release cadence is slow compared with commercial viewers.

How is this list ranked?

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