Best Free Post-Quantum Cryptography (PQC) Software of 2025

The CLEAR™ Cryptosystem is a FIPS-140-3 validated encryption SDK designed to secure files, streaming media, databases, and network communications with cutting-edge, programmable encryption technology. Fully compatible with all modern computing platforms, CLEAR™ provides a simple, turnkey solution for integrating advanced encryption into existing security systems. With Post-Quantum Cryptography (PQC) capabilities, it delivers future-proof protection against emerging cybersecurity threats, ensuring your data is secured with the strongest available encryption methods. Key Features: • PQC Encryption Strength ( 512bit - 10,240bit) • Ultra Low-Latency Streaming (< 11µs / Packet) • Hyperkey™ Technology with embedded ACL • Multi-Factor / Bio-Metric Symmetric Keys • Plug-N-Play Entropy - CSRNG, QRNG, HRNG Benefits: • Pass cybersecurity audits with best-in-class tools • Share data securely via Sharepoint, Dropbox, etc. • Protect legacy gear and outdated network equipment • Extend protection to files in 3rd party portals • Future lasting power - long-term data archival

QSE Group offers innovative quantum-proof data protection services designed to secure your data from evolving cyber threats, including potential risks posed by quantum computing. Their decentralized, immutable cloud storage ensures that your data remains safe from ransomware and other attacks, while their proprietary encryption technology remains future-proof. The platform’s Entropy as a Service (EaaS) provides quantum-resilient randomness for encryption key generation, ensuring data security both now and in the future. By integrating seamlessly into your existing infrastructure, QSE offers a simple yet robust solution for businesses seeking long-term protection without the need for major overhauls. The system is built to scale, offering flexibility from small business needs to enterprise-level demands.

Blaze Transfer is a great solution for those who need to send large files quickly and safely. Blaze's Quantum Safe End-to End encryption ensures that your data is completely secure, whether you are sharing it with coworkers or working with people outside of your organization. Blaze Transfer is intuitive and user-friendly, so you don't have to be a techie to use it. Upload your files, choose who you'd like to share them with and then relax while they are delivered safely and securely.

PryvateNow serves as an all-encompassing communication platform that ensures the encryption and protection of voice and video calls, instant messages, emails, and conference calls, whether conducted on or off a network. Designed for small to large businesses, it enables organizations to maintain complete oversight of their communications and data security. Among its standout features are Post-Quantum ZRTP encryption, which guarantees top-tier data protection, as well as integrated auditing and compliance that meet the standards of MiFID II, HIPAA, and GDPR. Additionally, it offers white-labeled OEM versions of Pryvate Closed User Groups (CUG) for customized user experiences. The platform also includes a Secure Integration Kit for VoIP, facilitating the smooth incorporation of Pryvate's secure communication tools into existing systems. Moreover, PryvateNow's technology encompasses not only encrypted voice and video calls but also secure options for email, file transfer, storage, and hosting voice and video conferences with utmost security. This holistic approach ensures that users can communicate confidently and securely across various channels.

EJBCA, an Enterprise-grade PKI platform, can issue and manage digital certificates in the millions. It is one of the most widely used PKI platforms worldwide and is used by large enterprises in all sectors.