Horos review
A focused desktop viewer for local DICOM review, visualization, and network transfer.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
For clinicians, researchers, educators, and other Mac users who need local radiology image review, Horos is a free, open-source DICOM application. It brings study viewing and analysis into a desktop workflow, with 2D visualization, 3D visualization and reconstruction, and a local DICOM study database. Its scope is image review rather than a broader radiology information system, making it a fit for users whose needs center on viewing studies rather than managing RIS workflows.
Horos also covers key DICOM exchange tasks: it can query and retrieve studies over a DICOM network, and export or send DICOM images. Those features complement the local database, so the application spans local study handling and network-based retrieval without being presented as a hosted cloud service. Deployment is desktop software for macOS; that makes platform fit a central consideration. Users on other operating systems, or teams looking for access through a cloud service, should consider another option.
The product is distributed free and open source, so there are no paid tiers to compare in its published description. Support channels are community and documentation, a model likely to suit users comfortable relying on those resources rather than a commercial support channel. Horos is best suited to solo users and small or mid-market settings seeking a Mac-based DICOM viewer with 3D tools. Organizations that need RIS functionality or a wider radiology management system should look elsewhere; for focused local image review and DICOM transfer, its feature set is more aligned.
Horos pros and cons
- Where it wins
- Free, open-source macOS desktop software
- Combines 2D viewing with 3D visualization and reconstruction
- Supports local study storage, DICOM query/retrieve, and export
- Where it doesn't
- No RIS functionality
- Limited to desktop viewing rather than a hosted cloud service
- Mac-only availability excludes users on other platforms
Horos fact sheet, pricing and score →
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