Open Collective
Open Collective



We maintain the Orthanc DICOM server eco-system.


Become a financial contributor.

Financial Contributions

Recurring contribution

If you're a freelance developer or a medical doctor using Orthanc, support us with a monthly donation to help us continue our activities.

Starts at
€10 EUR / month

Latest activity by

+ 7
Recurring contribution

If you're a software development company or a clinic using Orthanc, support us with a monthly donation to help us continue our activities.

Starts at
€150 EUR / month

Latest activity by

+ 3
Custom contribution
Make a custom one-time or recurring contribution.

Latest activity by

+ 26


Support the following initiatives from Orthanc.

Update google client libraries to avoid deprecation

Top financial contributors


Oak-Tree Technologies

7,295.33 EUR since Feb 2022

James Manners

4,779.5 EUR since Feb 2022

Benjamin Golinvaux

4,374.51 EUR since Feb 2022

Viv Barrett

3,920.35 EUR since Apr 2022

Mathieu Ficara

3,181.55 EUR since Apr 2022


2,073.82 EUR since Feb 2022

Roland Talanow

1,472.95 EUR since Feb 2022

Charles Waweru

699.02 EUR since Jun 2022

Mohannad Hussain

526.19 EUR since Feb 2022

Merence Sibomana

514.45 EUR since Nov 2022


493.89 EUR since Aug 2023

Martin Stenzel

354.06 EUR since Apr 2022

Diego Victor de Jesus

271.26 EUR since Apr 2022

Stephen D. Scotti, M.D.

228.53 EUR since Jun 2023

Kyle Bolt

149.09 EUR since Feb 2024


CH Studio

80,465.55 EUR since Feb 2022

Orthanc is all of us

Our contributors 32

Thank you for supporting Orthanc.

CH Studio

€80,466 EUR

Oak-Tree Tech...


€7,295 EUR

James Manners


€4,780 EUR

Benjamin Goli...


€4,375 EUR

Viv Barrett


€3,920 EUR

Mathieu Ficara


€3,182 EUR



€2,074 EUR

Roland Talanow


€1,473 EUR

Charles Waweru


€699 EUR

Mohannad Hussain


€526 EUR


Transparent and open finances.

Credit from Hao Xin to Orthanc

Contribution #777678

Credit from Roland Talanow to Orthanc

Contribution #518262
Contribution #734050
Today’s balance

€11,182.17 EUR

Total raised

€95,670.39 EUR

Total disbursed

€84,488.22 EUR

Estimated annual budget

€51,204.15 EUR


Let’s get the ball rolling!

News from Orthanc

Updates on our activities and progress.

Orthanc 1.12.2 is out with other plugins

Hi everyone, It’s my pleasure to announce that we have just released Orthanc 1.12.2 and a few other updated plugins.Orthanc 1.12.2 does not include any big new features but a lot of small improvements made over the last 6 months. Check the...
Read more
Published on December 21, 2023 by Alain Mazy

Orthanc Explorer 2: introducing user permissions and study publication links

Dear community, I'm glad to announce the new releases of Orthanc Explorer 2 and the authorization plugin. Together with a companion web service and Keycloak, we are now able to implement user permissions in Orthanc. The orthanc-auth-service...
Read more
Published on March 20, 2023 by Alain Mazy

New releases

Dear Orthanc community, It has been a while since our last message - sorry for that. We are now back with a few new releases ! Orthanc 1.11.3 is now available, no big revolutionary features but still:- the memory consumptio...
Read more
Published on February 7, 2023 by Alain Mazy


First a very quick history of Orthanc and its maintainers:
  • 2011 : Sébastien Jodogne created and developed Orthanc alone while working at the University Hospital of Liège – Belgium (CHUL).
  • 2015 : Together with myself (Alain Mazy) and other stakeholders, Sébastien founded Osimis to provide professional services around or on top of Orthanc, as well as to propose certified products that can be deployed within US/EU hospitals.
  • 2021 : Both Sébastien and I left the Osimis management team. Sébastien became professor at University of Louvain – Belgium (UCLouvain) and I went back to freelancing as a Software Developer.

The situation in February 2022 is as follows:
  • Osimis has decided to reduce its support to Orthanc development and focus on AI integration.  Therefore, I’m willing to find a new sustainability model for the Orthanc eco-system.
  • Sébastien continues to develop Orthanc for research and teaching purposes as part of his work at the University, and to maintain the project according to the mission statement of the Orthanc project: “Share technical knowledge about medical imaging.”
  • I will maintain Orthanc with a focus on general community users like software vendors integrating Orthanc in their apps or users running Orthanc as a small PACS.
  • Osimis is still providing the build/hosting infrastructure for the Orthanc project and is funding me a few days a month to keep the project active from an industrial point of view.
  • The Orthanc IP belongs to CHUL – Osimis – UCLouvain and this will remain.  Although this hinders accepting external contributions, this situation is currently fine for the maintainers. Should the project sustainability require it, the maintainers would have the opportunity to fork the project to make sure it keeps going forward. A fork is annoying for everyone, users and maintainers, so it is best to stay away from it.

Unfortunately, with only a few days funded each month, I do not have enough time to create real new features in Orthanc or to effectively maintain it.

Therefore, I am calling for the community to help fund the Orthanc project and mutualize the development cost between as many backers/sponsors/donators as possible.

If you are a Medical Doctor using Orthanc in your daily activity or a freelancer providing Orthanc support, remember that you have paid for your desk or your printer but, so far, you have probably not paid anything for Orthanc. If you think Orthanc is as important to your business as your desk or your printer, then feel free to become a backer of the Orthanc project on Open Collective.

If you are a small clinic using Orthanc in your daily activity, a software company that is integrating Orthanc in its solution, remember that you have paid for your X-Ray, office coffee machine or cloud infrastructure but, so far, you have probably not paid anything for Orthanc. If you think Orthanc is as important to your business as your X-Ray, your office coffee machine or your cloud infrastructure then feel free to become a sponsor of the Orthanc project on Open Collective.

My first goal in funding is to reach 5.600 EUR a month in order to pay 80h a month to maintainers so as to get back to more regular bug fixes, new features, and community support!

Note that, when contributing financially to a free and open-source project, you are not hiring the maintainers for your own needs. You are invited to suggest new features and request bug fixes, but the maintainers are driving the development and roadmap, trying to accommodate the needs of the whole community. 

Thanks a lot for your support.


Our team