Best Free Post-Quantum Cryptography (PQC) Software
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Compare the Top Free Post-Quantum Cryptography (PQC) Software as of June 2026
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What is Free Post-Quantum Cryptography (PQC) Software?
Post-quantum cryptography (PQC) software refers to cryptographic systems and algorithms designed to secure data against the potential future threat posed by quantum computers. Traditional cryptographic methods, such as RSA and ECC (Elliptic Curve Cryptography), rely on the difficulty of certain mathematical problems that could be solved efficiently by a sufficiently powerful quantum computer. Post-quantum cryptography focuses on developing new cryptographic protocols that are resistant to quantum computing threats, utilizing algorithms based on lattice-based, hash-based, multivariate, or code-based cryptography. This software ensures that data remains secure even in the era of quantum computing, offering a bridge between today's cryptographic practices and the future landscape of quantum-enhanced threats. Compare and read user reviews of the best Free Post-Quantum Cryptography (PQC) software currently available using the table below. This list is updated regularly.
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1
CLEAR
Quantum Knight
The CLEAR™ Cryptosystem is a FIPS-140-3 Validated programmable state-of-the-art encryption SDK for securing files, streaming video, databases, and networks. Compatible with all types of modern computer platforms, CLEAR™ is an easy to integrate, turn-key tool for boosting existing cybersecurity with Post Quantum (PQC) strength. Apply CLEAR™ Cryptosystem anywhere you want to secure data in your own digital ecosystem. CLEAR™ is a single file with a smaller footprint than a single image on a smart phone. It can be deployed online or offline and works on more than 30 types of modern operating systems and embedded equipment. Designed for maximum efficiency and simplicity, CLEAR can dramatically reduce energy usage at scale, relative to other legacy cryptography.Starting Price: Free -
2
QSE
QSE Group
QSE Group delivers quantum-resilient cybersecurity solutions designed to protect sensitive data from both current and future threats, including quantum computing. Using post-quantum cryptographic algorithms aligned with NIST standards, QSE secures data through encryption, key management, and secure communications. Built with an API-first design, it integrates easily into existing cloud, on-prem, or hybrid environments. Core features include secure entropy generation, zero trust policy enforcement, and compatibility with identity systems and SIEM tools. QSE also supports white-label deployment for SaaS vendors and MSPs. With real-time monitoring, compliance-ready reporting, and applications across finance, healthcare, legal, and government sectors, QSE enables future-proof protection without disrupting current infrastructure. It's a practical, scalable solution for organizations serious about long-term data security.Starting Price: $19.90/month -
3
Blaze Transfer
Blaze Transfer
Blaze Transfer is a secure platform, designed for swift and safe large file transfers. It employs Post-quantum end-to-end encryption, protecting files from threats of quantum and classical computers while ensuring rapid transfers. Key features of Blaze Transfer include Collaborative Workspaces for unlimited file sharing between workspaces, enhancing team and client collaborations. It allows large files transfer of any type, from any location, on any device, removing concerns about security and size. The platform also supports interaction with external, non-BLAZE users, offering a secure upload and download portal operated by a unique shared security key for file exchange. Blaze Transfer's File Transfer History feature provides a detailed record of past transfers, enabling users to review, download, reshare, and manage file expiration dates with ease. To manage files easily, BLAZE Transfer provides OneDrive integration to transfer your files directly to your Drive.Starting Price: €5/user/month -
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PryvateNow
PryvateNow
PryvateNow is a comprehensive communication platform that encrypts and secures voice and video calls, instant messages, emails, and conference calls, both on and off the network. It offers solutions tailored for small and medium-sized enterprises, corporate entities, and large enterprises, ensuring full control over communications and data. Key features include Post-Quantum ZRTP encryption for world-leading data security, built-in auditing and compliance aligning with MiFID II, HIPAA, and GDPR, and white-labeled OEM versions of Pryvate Closed User Groups (CUG) available. The platform also provides a Secure Integration Kit for VoIP, allowing providers to integrate Pryvate’s secure communication suite into their existing platforms seamlessly. PryvateNow's technology encompasses encrypted voice and video calls, secure email, file transfer and storage, and secure voice and video conference calls.Starting Price: $1.25 per month -
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Keyfactor EJBCA
Keyfactor
EJBCA is an Enterprise grade PKI platform capable of issuing and managing digital certificates in the billions. One of the most used PKI platforms globally, it is used by governments and large enterprises across all sectors. PKI shouldn't be complex. Simplify it, with EJBCA® Enterprise, the only PKI platform that deploys fast, runs anywhere, and scales on-demand — so you can issue and manage thousands, even billions of certificates, no problem. Powered by the most trusted and widely used open-source PKI, EJBCA Enterprise empowers teams to establish trust with identity-first security for every human and machine, anywhere. Replace legacy CA solutions with a flexible and scalable PKI platform to issue and manage certificates for devices, workloads, and users. Embed certificate-based identity into thousands or millions of connected products with a fast and scalable PKI solution.
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