Connexion v26 modernizes the runtime and desktop tools, adds Linux and cloud deployment options, expands database and message-storage choices, and supports multi-active application servers. It also adds new integration and development tools and improves the reliability of day-to-day message processing.

• Modernized Runtime — .NET 10, x64 services, modern hosting, gRPC communications and a certificate-authenticated management REST API.

• Performance Improvements — UI startup, scrolling, dashboard refresh and device-editing improvements, plus server batching, streaming and the 1,000-channel v16/v26 comparison.

• Cross-platform desktop tools — the Connexion Client, Gateway management UI and configuration tools now use Avalonia. Linux Client and Gateway UI packaging includes desktop integration and Connexion link handlers. See Linux Support.

• Multi-Active Application Servers — share workloads across active servers and provide failover capacity.

• Cloud Dynamic Scaling & Integration, Kubernetes: Dynamic Scaling and Kubernetes and Helm: Deployment & Management — deploy and operate elastic infrastructure.

• Dynamic Inbound Routing — keep inbound endpoints routed to the current channel owner.

• PostgreSQL Support — use PostgreSQL for configuration databases and message repositories alongside SQL Server.

• Managed cloud databases — use Amazon RDS for PostgreSQL, Azure Database for PostgreSQL or Google Cloud SQL for PostgreSQL with cloud identity authentication. Azure SQL connections also support Microsoft Entra ID authentication.

• SQL Server Queue V2 — partitioned, batch-oriented storage with per-group partition intervals and Tier 1 retention overrides.

• Large Message and Attachment Support — streamed payload access and large-object storage in the database, Amazon S3, Google Cloud Storage or Azure Blob Storage.

• Message Archiving and Tier 2 Storage — query archived messages alongside active messages, trace their origins and copy archived messages back into queues.

• AWS Lambda custom code — author C# message processing in Connexion and run it in Lambda, with deployment, execution modes and diagnostics. See Additional Items.

• FHIR and C-CDA Devices — conversion between HL7 v2, FHIR (R4 and R5) and C-CDA, FHIR and C-CDA validation with site rules and reporting, and FHIR REST delivery.

• Remote Agent Request/Reply — a channel asks a channel on the other side of the Gateway and continues with its answer, for example FHIR queries from a cloud service to a site's EHR, or from a site to a central repository, with no inbound firewall rule at the site.

• Razor Transformation — modern Razor template processing.

• Improved development tools — Roslyn code completion and quick actions, v16 code-upgrade assistance, NuGet publishing, and database-provider packages that can deploy to Remote Agents.

• Plugin Developers: What You Need to Know for v26 — migration to .NET 10, asynchronous APIs, runtime/UI separation and Avalonia. Existing v16 plugins require migration and rebuilding.

• Modern Authentication, Authorization, and Certificates — identity providers, server-enforced permissions, managed certificates and protected configuration.

• AI-Assisted Connexion with MCP — governed authoring, inspection and diagnostics, including Remote Agent queues and Tier 2 message workflows.

• Observability, Metrics, and Structured Logging — OpenTelemetry, structured logs, cloud metrics export and dashboards, with expanded activity-history and Linux monitoring support.

• Additional Features and Reliability Improvements — database partitioning and archiving stability, graceful shutdown and checkpoint recovery, more reliable cloud and Remote Agent transfers, consistent queue searches, and improved keyboard access.