Start with viewer versus PACS
Weasis belongs in the DICOM viewer conversation, and it is one of the best free options in it. A viewer opens a study and lets a clinician read it. That is a real, well-defined job, and Weasis does it on the desktop without charging for the privilege. It is commonly paired with a separate archive, most often the open-source dcm4chee, which is the part that actually receives and stores the studies.
What you assemble around Weasis
Choosing Weasis is choosing to run the reading tool for free and to own the rest yourself. In practice that means:
For a team with the engineering time, that is a legitimate and low-cost route. If you are weighing the open-source path more broadly, the Orthanc alternative comparison and the self-hosted PACS guide walk the same trade in detail.
Where MiniPACS fits
MiniPACS is the assembled version of that stack for an independent center that would rather run imaging than integrate a viewer with an archive. It receives from the modalities, stores studies in an archive you own, and opens them in a browser in about 0.6 seconds (measured) with no desktop install. The archive stays under your control rather than a vendor's, whether that means a mini PC for a single site sitting in the clinic or a cloud server in an account you hold the keys to; backups are yours either way. It installs with Docker on Linux, on hardware in the clinic or on a cloud VM if you would rather keep the box off-site, and is priced as a flat fee per location, not per study.
Weasis is the better answer when the requirement is a free, capable desktop reader. MiniPACS is the better answer when the requirement is a clinic-wide, backed-up, browser-accessible archive that works the week it is installed. To see it rather than read about it, the landing page has pricing and a live demo you can click through.
MiniPACS assembles the archive, browser viewer and worklist into one self-hosted system, so you run imaging instead of integrating Weasis with a separate archive - open the live demo and read a study yourself.
FAQ
Is Weasis a PACS?
No. Weasis is a free, open-source DICOM viewer. It opens and reads studies very well, and it is often paired with a separate archive such as dcm4chee to pull studies from. A PACS is that archive and the workflow around it: it receives studies from modalities, stores and indexes them, and serves them to users. MiniPACS is in the PACS category, with a browser viewer included, so the archive and the viewing are one system rather than two you assemble.
Is MiniPACS a Weasis replacement?
Not if the job is simply viewing DICOM on a workstation. Weasis is excellent and free for that. MiniPACS is the step up when an independent clinic needs one shared archive, browser viewing from that archive without installing a desktop client, encrypted backups it owns, and a flat price. If all you need is to open a file, keep Weasis.
When should a clinic move from Weasis to MiniPACS?
Move when the problem stops being 'open this study' and becomes 'run our imaging'. If studies need to land in one archive automatically from the modalities, appear for several users, stay backed up and exportable, and open in a browser from anywhere on the network rather than on a machine with Weasis installed, the clinic has a PACS requirement, not a viewer-only one.
Does MiniPACS still let me view like Weasis does?
Yes. MiniPACS includes a browser DICOM viewer as part of the self-hosted system, so studies open in about 0.6 seconds (measured) with no plugin and no desktop install. Weasis remains a strong choice as a heavy-duty desktop reading tool; MiniPACS is about giving the whole clinic viewing from a shared, backed-up archive.
How is MiniPACS priced?
MiniPACS is licensed flat by location: $3,600 per location per year for MiniPACS, or $7,680 per location per year for MiniPACS plus Vendo. There are no per-study fees. Weasis itself is free and open source; the cost of the Weasis route is the separate archive, backups and workflow you assemble and maintain around it.
