PQShield UltraPQ Suite

PQShield is a specialized cryptography company spun out of Oxford University in 2018, and its UltraPQ Suite represents the most complete full-stack PQC offering from a dedicated post-quantum vendor. Unlike the hyperscaler offerings, which focus on specific services or protocols, UltraPQ covers the entire deployment spectrum: from a 5-kilobyte embedded implementation designed for 32-bit microcontrollers with as little as 64KB of RAM, through mobile SDKs for iOS and Android, to a full enterprise TLS library with hardware acceleration. The embedded tier (PQShield Embedded) is arguably the most technically impressive component: it achieves FIPS 203-compliant ML-KEM-768 in 5KB of code size with 4.8KB stack usage on ARM Cortex-M4, making it viable for IoT devices, automotive ECUs, smart cards, and secure elements that simply cannot accommodate the 50-200KB footprint of typical PQC implementations. This positions PQShield as the only credible option for enterprises with IoT fleets or embedded device supply chains that need end-to-end quantum resistance. For enterprise TLS deployments, PQShield TLS provides a complete ML-KEM and ML-DSA implementation with optional hardware acceleration support. FIPS 140-3 certification — achieved in 2025 — is a critical differentiator; PQShield is among the first dedicated PQC vendors to achieve CMVP certification for post-quantum algorithms, enabling deployment in regulated environments that require a validated module without waiting for OpenSSL's FIPS 3.5 process to complete. PQShield's hardware IP (PQSoC) is licensed to semiconductor manufacturers for integration directly into SoCs, FPGAs, and ASICs. Several ARM-based processor vendors have licensed PQShield's ML-KEM accelerator IP, meaning future enterprise server and network hardware will ship with hardware-accelerated PQC as a built-in feature. PQShield provides commercial support contracts with named cryptographers, which matters to organizations that need expert human escalation paths for cryptographic edge cases.