List of the Top 5 Free Post-Quantum Cryptography (PQC) Software in 2025

The CLEAR™ Cryptosystem is an encryption software development kit (SDK) validated by FIPS-140-3, specifically created to safeguard files, streaming media, databases, and network communications through innovative and programmable encryption technology. It seamlessly integrates with all contemporary computing systems, offering an effective and straightforward solution for embedding advanced encryption into current security infrastructures. With its Post-Quantum Cryptography (PQC) capabilities, CLEAR™ ensures robust defense against future cybersecurity challenges, allowing you to secure your data with the most powerful encryption techniques available. This system not only enhances data protection but also allows for swift access and communication across various platforms. 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, and similar services • Protect legacy hardware and older network systems • Extend security to files stored in third-party platforms • Ensure lasting protection for long-term data archival needs, making it a comprehensive choice for organizations looking to the future.

QSE Group specializes in providing quantum-proof data protection solutions that address the growing threat of cyberattacks, including those from future quantum computing technologies. Their decentralized cloud storage platform offers immutable data protection, ensuring continuous access without the risk of over-encryption from ransomware. Through their proprietary encryption technology and Entropy as a Service (EaaS), QSE delivers true randomness for secure key generation, making data breaches virtually impossible. The system is designed to integrate smoothly with existing infrastructures, minimizing disruption while maximizing security. QSE’s services are scalable, supporting businesses of all sizes with secure, high-performance cloud storage and quantum-resilient encryption solutions. By offering flexible API access and a straightforward implementation process, QSE ensures businesses can adapt to future threats without needing significant infrastructure changes. With their focus on quantum-resilient encryption, QSE is providing the long-term security businesses need in the face of ever-evolving cyber risks.

Blaze Transfer offers an excellent option for individuals looking to transmit large files swiftly and securely. With its Quantum Safe End-to-End encryption, Blaze guarantees that your data remains fully protected, whether you're collaborating with colleagues or sharing information with external partners. The platform is designed to be intuitive and accessible, making it easy for anyone to navigate, regardless of their technical expertise. Simply upload your files, select your recipients, and then rest assured knowing that your files will be sent safely and securely. It's a reliable choice for those who value both speed and security in file sharing. Plus, the seamless experience enhances productivity and peace of mind for users.

PryvateNow is a comprehensive communication solution that provides encryption and safeguards for voice and video calls, instant messaging, emails, and conference calls, regardless of whether they are made online or offline. Tailored for businesses of all sizes, it allows organizations to have full control over their communications and the security of their data. Notable features include Post-Quantum ZRTP encryption, which offers exceptional data protection, alongside integrated auditing and compliance capabilities that align with regulations such as MiFID II, HIPAA, and GDPR. Furthermore, the platform provides white-labeled OEM versions of Pryvate Closed User Groups (CUG), enabling personalized user experiences. It also includes a Secure Integration Kit for VoIP, which helps seamlessly integrate Pryvate's secure communication solutions into pre-existing systems. In addition to encrypted voice and video calls, PryvateNow's technology extends to secure email, file transfers, data storage, and hosting secure voice and video conferences, reinforcing its commitment to user security. This all-encompassing strategy ensures that users can engage in secure and confident communication across multiple platforms, enhancing overall organizational productivity.

EJBCA is a robust PKI platform designed for enterprise use, capable of issuing and managing millions of digital certificates efficiently. Its popularity spans globally, as it serves large organizations across various industries, making it a trusted choice for secure digital certificate management.