List of the Top 4 Post-Quantum Cryptography (PQC) Software for Windows 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.

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.

AVX ONE offers a cutting-edge SaaS platform tailored for managing certificate lifecycles effectively. It caters to the requirements of enterprise PKI, IAM and security professionals, as well as DevOps, cloud, platform, and application teams. With AVX ONE, users gain enhanced visibility, automation, and control over their certificates and keys, facilitating agile responses to cryptographic changes and potential threats. This capability helps mitigate the risk of outages and ensures preparedness for the era of Post-Quantum Cryptography. Additionally, AppViewX serves as a comprehensive platform that delivers immediate benefits through organization-wide certificate lifecycle management and automation for Kubernetes/container TLS, while also providing scalable PKI-as-a-Service, seamless Microsoft PKI Modernization, secure code-signing, IoT Identity Security, SSH Management, and readiness for Post-Quantum Cryptography advancements. By leveraging these features, businesses can enhance their security posture and streamline their certificate management processes effectively.

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.