Weasis
Partial: Full DICOM viewer under EPL-2.0 or Apache-2.0; its maker says the open-source build is not a certified device.
License: Open source
- Windows
- macOS
- Linux
Status: Active
No free alternative to OsiriX MD yet
Free DICOM viewers exist, but none is cleared as a medical device for diagnostic reading; Weasis says its open-source build is not CE marked or FDA cleared.
About this gap
- OsiriX MD, OsiriX MD, monthly
$839.88 USDa year
≈$1,197.42 CAD a year (converted from USD)
- Build effort
Years, or a funded team
An editor’s estimate for a free tool that ranks Strong.
- Demand
Nobody has asked for one yet.
What a free alternative needs
The capabilities that keep people paying for OsiriX MD.
Regulatory clearance for diagnostic use
FDA clearance and CE marking, with the documentation and post-market process behind them.
Quality management for each release
Fast 2D and 3D reading on large studies
PACS connectivity with vendor support
Why it is hard
Clearance needs a quality management system, risk files and a regulatory submission for every release line; the code is not the hard part.
Closest free options
Each covers part of the job. None replaces OsiriX MD yet.
Listed alternatives for some uses
These are mapped to OsiriX MD at the Situational tier: they fit some uses only.
Weasis
Best for viewing DICOM studies without diagnostic clearance
License: Open source- Windows
- macOS
- Linux
Status: ActiveFree, open source and cross-platform with PACS and DICOMweb support. Its maker says primary diagnostic use is the user's or institution's responsibility.
Building one?
List your tool on Gratistack when it works. Once an editor maps it to OsiriX MD, it shows on this page and in search, and the people waiting here can hear about it.
- Listing is free. An editor reviews the free queue every week.
- Want a decision sooner? The optional $49 fast-track gets one within 48 hours. It buys speed, not approval, and a rejection is refunded.
- Once it is listed as an alternative, you can sponsor the alternatives page for $149 per 30 days. Sponsors are labeled and never change the ranking.
About this page
Last checked : an editor confirmed that no free alternative ranks Strong.
Price: OsiriX MD, monthly, checked Oct 8, 2026. Price source. USD to CAD at 1.4257 as of Oct 7, 2026.
Know a free alternative? Tell us.
OsiriX MD is a product of Pixmeo, named here for comparison only.