Mirth Connect 4.5.2 is the last open-source version published by NextGen Healthcare. In a statement released in March 2025, NextGen confirmed that they will no longer maintain the dual license model for Mirth Connect.
Starting from Mirth Connect 4.6, the platform will become closed source and only available as a commercial product. This marks a significant shift for a tool that has been a cornerstone in healthcare integration for years.
NextGen has published a seven-page FAQ document outlining the reasons for this change and answering common concerns. You can find a link to the document at the end of this post.
Mirth Connect has long been an excellent integration engine, and it’s disappointing to see the open-source version discontinued. However, since all the source code for version 4.5.2 is still available—and given how widely used Mirth is in healthcare IT—there is reason to be optimistic.
It’s likely that a community fork will emerge, with developers continuing to build on top of the 4.5.2 base. Ideally, such a fork would provide feature updates, bug fixes, and security patches, ensuring that the open ecosystem lives on.
If you’re aware of any active forks or community-led projects continuing Mirth Connect development, please share them in the comments below. I’d love to hear more.
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