This feature set focuses on the themes of , Advanced Rigid-Flex , and Multi-board System Integration .
This specific build stabilizes the BOM CoDesign features and high-speed simulation tools that became public-ready during the version 25 lifecycle. For teams moving toward the Altium 365 cloud ecosystem , these builds provide the necessary infrastructure for real-time history tracking and team-based version control. Public Release Notes - Altium Designer Documentation altium designer 2521 build 25 exclusive
I notice you mentioned — this appears to be a typo, as the current version numbering for Altium Designer follows a year‑based format (e.g., 24, 25, 26). This feature set focuses on the themes of