Relativity Server 2026 Developer News

This topic describes upcoming changes, the status of ongoing initiatives, and noteworthy release and deprecation changes that may impact Relativity Developers. You can also review and subscribe to postings on the Relativity Developer Group for more announcements.

Released Items

This section describes released items in Server 2026 noteworthy to Relativity developers. For a comprehensive sortable and filter-able list of product changes as well as changes impacting developers, please see the Relativity Server release notes topic

.NET 4.8.1 Target framework required for custom applications
Beginning with Server 2026, all custom Relativity Server applications that include custom resource files and are not built exclusively from the Relativity frontend must target .NET Framework 4.8.1. See this post on the Relativity Developer group for more information: Relativity Server 2026 Requirement: .NET 4.8.1 Target Framework for Custom Applications.
SDK/API Version updates
Relativity Server SDKs/APIs are versioned for each release. See the SDK and API comparison topic for details on the applicable versions for Relativity aiR, Relativity Server 2026, and Relativity Server 2025.

What's New in Previous Versions

For full information about changes in the previous versions of Relativity, see the Platform change log and the documentation sites for the following versions.

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