Best Post-Quantum Cryptography (PQC) Software for Linux
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Compare the Top Post-Quantum Cryptography (PQC) Software for Linux as of June 2025
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What is Post-Quantum Cryptography (PQC) Software for Linux?
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 Post-Quantum Cryptography (PQC) software for Linux currently available using the table below. This list is updated regularly.
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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
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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AVX ONE
AppViewX
AVX ONE is the most advanced SaaS certificate lifecycle management (CLM) platform for enterprise PKI, IAM, security, DevOps, cloud, platform and application teams. With visibility, automation and control of certificates and keys, AVX ONE enables crypto-agility to rapidly respond to cryptographic changes, mitigate threats, prevent outages and prepare for Post-Quantum Cryptography. In one unified platform, AppViewX provides instant value via enterprise-wide CLM, Kubernetes and container TLS automation, scalable PKI-as-a-Service, easy Microsoft PKI modernization, secure code signing, IoT identity security, SSH management, and Post-Quantum Cryptography (PQC) readiness with AI and ML risk reduction capabilities in complex hybrid, multi-cloud and edge environments. -
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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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