Download Mirth Connect

The last fully open-source Mirth Connect release was 4.5.2. After NextGen Healthcare moved later versions (4.6 and up) to commercial licensing, the open-source lineage continues as the Open Integration Engine (OIE): a free, community-maintained engine that is fully compatible with existing Mirth Connect channels, code templates, and configurations. Until upstream OIE ships its fixes for CISA advisory ICSMA-26-253-01, we recommend OpenShare Engine, Saga IT's open-source build of OIE with all three fixes, as an installer or Docker image. Upstream OIE is also available, and the MirthSync plugin adds Git-based version control to either.

The Open Integration Engine (OIE) is a free, open-source healthcare integration engine forked from Mirth Connect after NextGen Healthcare transitioned Mirth Connect to commercial licensing. OIE is fully compatible with existing Mirth Connect channels, code templates, and configurations. It is maintained by the open-source community and supported professionally by Saga IT.

Yes. OIE is free and open-source software, licensed under the same open-source terms as the original Mirth Connect codebase. There are no per-server fees, per-message fees, or subscription costs for the integration engine itself. Saga IT offers optional professional support and consulting services for organizations that need expert assistance.

The OpenShare Gateway is a plugin for Mirth Connect and OIE servers that connects them to OpenShare, an integration platform built on OIE. It powers three capabilities from one browser console: operating your integration servers (channel management, message browser, deploys, no Java client, no open ports), monitoring your whole fleet (channel health, throughput, error-rate alerting), and sharing channels and data with partner organizations over encrypted gateway tunnels. The plugin is included pre-installed in the full OIE package or available as a standalone download for existing servers.

Yes. OIE maintains full channel format compatibility with Mirth Connect: your existing channels, code templates, JavaScript transforms, and configuration maps transfer without modification. For professional migration assistance including compatibility testing, parallel-run validation, and zero-downtime cutover, see our OIE consulting services.

Yes. Saga IT provides professional consulting and support for OIE deployments, including migration from Mirth Connect, channel development, cloud-native deployment on AWS and Azure, CI/CD implementation with MirthSync, and 24/7 managed services. Visit our OIE services page for details.

OIE requires Java 17 or later, runs on Linux, Windows Server, or macOS, and needs a minimum of 4 GB RAM (8 GB recommended) with 2 GB of disk space. The OpenShare Gateway requires outbound HTTPS access on port 443 to connect to OpenShare. Connections are outbound-only, so no inbound firewall changes are needed. Both Docker images and traditional installers are available.