PQPlatform-SubSys by PQShield Ltd provides post-quantum signature generation, verification, and secure key establishment with side-channel protection. It uses its built-in CPU independently from the surrounding system, allowing cryptographic services to be offloaded efficiently from the system processor. PQPlatform-SubSys is designed for minimal integration effort and includes integral memory and a RISC-V CPU to offload cryptographic services. It is part of a high-performing solution with optimal performance of hardware as part of crypto-agility.