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Weasis alternatives: 4 apps ranked by verified data

Facts checked Nov 1, 2026AppBreakup editorialHow we rank

Common reasons people leave Weasis: integration settings are aimed at IT staff, not casual users, and less polished interface than commercial workstations. We ranked 4 alternatives by how directly each one replaces Weasis, then by reviews, real visits and how recently each app's facts were checked against its own website. 3D Slicer currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1OsiriX MD logoOsiriX MDPaidNomacOS, iOS4 of 452.2
  1. OsiriX MD logo

    1. OsiriX MDTop pick

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

    PaidmacOS, iOS

    52.2

    score / 100

    Why switch from Weasis

    Certified commercial Mac workstation for clinics that need FDA clearance.

    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 ×0.352
    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 Weasis 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 Weasis alternative for…

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

3D Slicer logo

Best Weasis alternative for most people

3D Slicer

Also free and open source, with much deeper segmentation, 3D modelling and research tools through extensions.

Horos logo

Best Weasis alternative for a free option

Horos

Free open-source viewer for Mac users who want an OsiriX-style workstation instead of a Java app.

3D Slicer logo

Best Weasis alternative for open source

3D Slicer

Also free and open source, with much deeper segmentation, 3D modelling and research tools through extensions.

OsiriX MD logo

Best Weasis alternative for Mac

OsiriX MD

Certified commercial Mac workstation for clinics that need FDA clearance.

RadiAnt DICOM Viewer logo

Best Weasis alternative for Windows

RadiAnt DICOM Viewer

Fast, polished Windows viewer with PACS client and 3D views, for users who prefer a paid, simpler app.

3D Slicer logo

Best Weasis alternative for Linux

3D Slicer

Also free and open source, with much deeper segmentation, 3D modelling and research tools through extensions.

Weasis alternatives: common questions

What is the best alternative to Weasis?

3D Slicer ranks first right now. Also free and open source, with much deeper segmentation, 3D modelling and research tools through extensions. RadiAnt DICOM Viewer and Horos follow it in our ranking.

Is there a free alternative to Weasis?

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

Is there an open-source alternative to Weasis?

Yes: 3D Slicer and Horos.

Which Weasis alternatives work on Linux?

3D Slicer runs on Linux.

Why do people switch from Weasis?

The complaints we hear most: integration settings are aimed at IT staff, not casual users; less polished interface than commercial workstations; only the native-installer edition is maintained since version 4.

How is this list ranked?

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