Arqit

Arqit is a quantum encryption technology company that has developed QuantumCloud, a unique software-only approach to creating quantum-safe encryption keys without requiring quantum hardware. Founded in 2017 by David Williams, the company went public in 2021 and provides quantum-safe encryption solutions to governments, enterprises, and telecommunications providers worldwide. Arqit’s technology creates encryption keys in satellite networks and distributes them globally, offering quantum-safe security that is impossible to predict, intercept, or decode. The company’s approach addresses the critical cybersecurity challenge posed by quantum computers, which threaten to break current encryption methods. Arqit has secured contracts with organizations including the UK Space Agency, European Space Agency, and various government departments, as well as partnerships with telecommunications companies and satellite operators. Their Federated Quantum System enables secure communications across ground, satellite, and space-based networks, positioning Arqit as a leader in quantum-safe security solutions for critical infrastructure and sensitive communications.

BTQ

BTQ is a Canadian post-quantum blockchain company founded in 2021 that develops quantum-resistant blockchain technologies and distributed ledger systems designed to remain secure against quantum computer attacks, creating post-quantum cryptographic implementations for blockchain networks, cryptocurrency systems, and decentralized applications, providing quantum-safe blockchain solutions, post-quantum digital signatures, and quantum-resistant consensus mechanisms that enable blockchain and cryptocurrency systems to maintain security and integrity even when cryptographically relevant quantum computers become available to adversaries.

Crypta Labs

Crypta Labs is a UK quantum security company founded in 2014 that specializes in quantum random number generation technology providing true quantum randomness for cryptographic applications, developing quantum entropy sources and random number generators that leverage quantum physical processes to produce unpredictable randomness essential for encryption keys, digital signatures, and secure protocols, serving cybersecurity companies, telecommunications providers, and organizations requiring certified high-quality entropy sources for quantum-safe cryptography and secure communications infrastructure.

Crypto Quantique

Crypto Quantique is a UK quantum security company founded in 2016 that develops quantum-driven IoT security solutions using quantum tunneling effects in semiconductor devices to generate unique cryptographic keys and device identities, providing hardware-based quantum random number generation and quantum-enhanced security for Internet of Things devices, edge computing systems, and connected infrastructure, enabling secure device authentication, encrypted communications, and tamper-resistant security solutions for smart cities, automotive, industrial IoT, and consumer electronics applications requiring quantum-grade security at scale.

Crypto4A Technologies

Crypto4A Technologies is a Canadian cybersecurity company developing quantum-safe cryptographic solutions and post-quantum cryptography systems to protect against future quantum computing threats. The company provides quantum-resistant encryption technologies, secure key management systems, and cryptographic hardware security modules designed to maintain security even in the presence of quantum computers capable of breaking traditional encryption methods. Crypto4A serves government agencies, financial institutions, and enterprise customers requiring long-term cryptographic protection, offering consulting services and implementation support for transitioning to quantum-safe security architectures that will remain secure against both classical and quantum computing attacks.

CryptoNext Security

CryptoNext Security is a French post-quantum cryptography company founded in 2019 that develops comprehensive quantum-safe security solutions including post-quantum cryptographic implementations, migration tools, and crypto-agility platforms that enable organizations to transition from classical to quantum-resistant encryption algorithms, providing software libraries, hardware security modules, and consulting services to help governments, enterprises, and critical infrastructure operators prepare for and deploy NIST-standardized post-quantum cryptography to protect against future quantum computer threats while maintaining interoperability with existing systems.

evolutionQ

evolutionQ is a Canadian quantum-safe cybersecurity company founded in 2015 that specializes in quantum risk assessment and post-quantum cryptography solutions, developing tools and services that help organizations evaluate their vulnerability to quantum computing threats and implement quantum-safe security measures, providing cryptographic migration services, quantum risk analysis, and post-quantum cryptography consulting that enables enterprises and government agencies to transition from classical encryption to quantum-resistant security systems before the advent of cryptographically relevant quantum computers threatens current encryption standards.

ID Quantique

ID Quantique (IDQ) is a Swiss quantum cybersecurity pioneer founded in 2001 as a University of Geneva spinoff that became the world leader in quantum key distribution (QKD) and quantum-safe security solutions, achieving multiple world firsts including the first commercial QKD system deployment in 2004 and breaking distance records with 307km QKD demonstrations, offering comprehensive quantum-safe products including the Cerberis XG and Clavis XG QKD systems serving governments, enterprises, and research institutions across 60+ countries with quantum cryptography solutions that provide forward security resilient against both classical and quantum computer attacks.

KEEQuant

KEEQuant is a German quantum key distribution company founded in 2020 that develops QKD systems and quantum cryptography solutions for secure communications, creating quantum-safe key distribution infrastructure that leverages quantum physics principles to generate and distribute encryption keys with provable security guarantees, providing QKD hardware, quantum network components, and secure communication solutions for government agencies, financial institutions, and enterprises requiring ultra-secure communications infrastructure protected against both classical eavesdropping and future quantum computer attacks through quantum cryptographic protocols.

KETS Quantum Security

KETS Quantum Security is a UK quantum communications company founded in 2016 as a University of Bristol spinout that pioneered the world’s first chip-to-chip quantum key distribution demonstration, developing miniaturized QKD devices manufactured in standard semiconductor foundries for integration into telecommunications networks, completing a £1.7 million government contract to develop security-hardened QKD prototypes for critical infrastructure including partnership with BT, increasing revenue over 70% year-on-year while expanding into defense, finance, and critical infrastructure sectors with quantum random number generators and chip-scale quantum encryption technologies.

MagiQ Technologies

MagiQ Technologies is a US quantum security pioneer founded in 1999 in Somerville, Massachusetts that achieved the historic milestone of delivering the world’s first commercial quantum key distribution product (Navajo) in 2003, followed by additional QKD systems including QPN 5505, QPN 7505, and QPN 8505 released in 2004-2006, providing quantum cryptography solutions based on the laws of quantum mechanics that generate truly random encryption keys impossible to intercept, serving US Department of Energy, DARPA, US Army, Air Force, NASA, and other government agencies with advanced network security and quantum-safe key distribution systems that deliver fool-proof defense against cryptographic challenges.

Post-Quantum

Post-Quantum is a UK cybersecurity company founded in 2009 that specializes in post-quantum cryptography solutions and quantum-safe security implementations, developing cryptographic libraries, security protocols, and migration tools that help organizations transition from classical encryption algorithms to quantum-resistant cryptography standards, providing post-quantum cryptographic software, security consulting services, and implementation support for enterprises, government agencies, and technology companies preparing for the quantum computing era when current encryption methods will become vulnerable to quantum attacks.

PQShield

PQShield is a UK-based post-quantum cryptography company founded in 2018 that specializes in quantum-resistant cryptography solutions, with researchers and advisory board members who co-authored multiple NIST-standardized algorithms including CRYSTALS-Dilithium, CRYSTALS-KYBER, Falcon, and SPHINCS+, being the first cybersecurity company to develop quantum-safe cryptography on chips with their PQPlatform IP and fully functional PQC silicon test chip, serving organizations across sectors with algorithm-agnostic implementations and $20 million in Series A funding to help enterprises transition to quantum-safe encryption ahead of the quantum threat.

Project Eleven

Project Eleven is a US-based cybersecurity company founded in 2021, developing post-quantum cryptographic infrastructure for blockchains and digital assets to secure them against future quantum computing threats. The company specializes in quantum-resistant encryption technologies, post-quantum cryptographic protocols, and blockchain security solutions designed to maintain security even when quantum computers become capable of breaking traditional cryptographic methods. Project Eleven provides quantum-safe security solutions for cryptocurrency platforms, blockchain networks, digital asset management, and decentralized finance applications, helping organizations prepare for the quantum computing era. The company develops cryptographic libraries, security protocols, and consulting services for blockchain companies and cryptocurrency platforms seeking to implement quantum-resistant security measures.

Q*bird

Qbird is a spin-off from Delft University of Technology that develops quantum-based hardware and software solutions providing ultra-secure data communications and protection for critical infrastructures. The company has successfully deployed multi-user, multipoint-to-multipoint Quantum Key Distribution (QKD) networks including operational installations in Utrecht connecting data centers, university buildings, and research facilities, and the world’s first quantum-safe industrial internet at the Port of Rotterdam. Qbird won the Dutch IT Channel Award 2025 in the Networking & Edge Innovator category and received €1 million in subsidies to advance QKD technology, with partnerships including Eurofiber to integrate quantum security into commercial networks and ambitious goals to operate 60 quantum networks across Europe, Asia, and North America by 2030.

Qasky Quantum Technology

Qasky Quantum Technology is a Chinese quantum communication company specializing in quantum key distribution systems, quantum secure communication networks, and quantum cryptography solutions for enterprise and government applications. The company develops quantum communication infrastructure including quantum key distribution hardware, quantum network management software, and secure quantum communication protocols for building quantum-safe communication networks across China. Qasky collaborates with Chinese telecommunications companies and government agencies to deploy quantum communication networks for national security applications, contributing to China’s national quantum communication infrastructure development and advancing practical quantum cryptography implementations for securing sensitive data transmission across various sectors including finance, healthcare, and government communications.

QNu Labs

QNu Labs develops quantum key distribution systems and quantum cryptography solutions for secure communications, providing quantum-safe networking products that enable organizations to protect sensitive data against both classical and quantum computing threats through advanced quantum encryption technologies.

Company Information

• Founded: 2016
• Country: India
• Website: https://qnulabs.com
• Categories: quantum security

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Qrypt

Qrypt is a US quantum-secure encryption company founded in 2017 that develops distributed quantum key generation technology eliminating the need to transmit encryption keys, using the BLAST protocol to enable independent symmetric key generation at multiple endpoints without key transmission risks, leveraging quantum random number generation through partnerships with Los Alamos National Labs to provide cloud-based quantum entropy services achieving 1.5 Gbps data rates, offering quantum-secure encryption solutions integrated with NVIDIA BlueField-3 DPUs and Megaport networks to protect against ‘harvest now, decrypt later’ attacks with anti-obsolescent architecture that remains secure even against future quantum computers.

Quantropi

Quantropi is a Canadian quantum-safe security company founded in 2018 that develops a comprehensive quantum-safe security platform combining quantum key distribution, post-quantum cryptography, and quantum random number generation technologies, providing end-to-end quantum-safe solutions that protect data and communications against both current and future quantum computing threats, offering cloud-based quantum security services, quantum-safe APIs, and integrated security solutions for enterprises, government agencies, and telecommunications providers seeking to implement quantum-resistant security infrastructure across their networks and applications.

Quantum Bridge Technologies

Quantum Bridge Technologies is a Canadian quantum networking company founded in 2019 as a University of Toronto spinout by Mattia Montagna (CEO) and Hoi-Kwong Lo (CTO), pioneering quantum-safe communications and quantum networking infrastructure. The company develops quantum key distribution systems, quantum repeaters, and quantum-safe cybersecurity solutions, partnering with Juniper Networks to advance industry-first quantum-safe networking solutions for enterprise and government applications. Professor Hoi-Kwong Lo, co-inventor of the all-photonic quantum repeater and ranking among the world’s top quantum cryptography researchers, brings decades of experience from Hewlett-Packard and MagiQ Technologies. Quantum Bridge focuses on building quantum networking infrastructure that enables secure quantum communications and distributed quantum computing applications, developing quantum-safe protocols and hardware for protecting critical infrastructure against both classical and quantum computing threats.

Quantum eMotion

Quantum eMotion is a Canadian quantum security company founded in 2007 that develops quantum random number generators and quantum entropy sources for cybersecurity applications, creating hardware-based quantum random number generation systems that leverage quantum physical processes to produce true randomness essential for cryptographic keys, digital signatures, and secure protocols, providing quantum entropy solutions, random number generation hardware, and quantum-safe entropy services for cybersecurity companies, telecommunications providers, and organizations requiring certified high-quality randomness for encryption, authentication, and secure communications applications.

Quantum Xchange

Quantum Xchange is a US quantum security company founded in 2018 that develops quantum-safe key distribution systems and quantum cryptography solutions for protecting sensitive communications and data against both classical and future quantum computing threats, providing quantum key distribution (QKD) networks and quantum-safe encryption services for government agencies, financial institutions, and enterprises requiring ultra-secure communications infrastructure that will remain secure even against quantum computer attacks.

Company Information

• Founded: 2018
• Country: USA
• Website: https://quantumxc.com
• Categories: quantum security

Key People

John Preskill (Chairman), Eddy Zervigon (CEO)

QuantumCTek

QuantumCTek is a Chinese quantum communication technology company founded in 2009 as a spinout from University of Science and Technology of China by prominent scientists including Pan Jianwei (China’s ‘father of quantum’) and Guo Guangcan, becoming China’s first publicly traded quantum technology company on Shanghai Stock Exchange Science and Technology Innovation Board (Stock Code 688027) in 2020, developing QKD systems deployed across China’s 46-node Hefei quantum network and Beijing-Shanghai Quantum Communication Backbone, expanding into quantum computing with receipt of a 504-qubit ‘Xiaohong’ superconducting chip in 2024, serving government agencies, financial institutions, and energy companies with quantum-secure communication solutions as part of China’s national quantum strategy.

Qubitrium

Qubitrium is a Turkish quantum technology company founded in 2020, developing solutions in quantum cryptography, quantum communications, and quantum sensing with a focus on satellite-based quantum key distribution systems. The company is working on a satellite-based quantum key distribution payload and develops quantum communication technologies for secure data transmission and quantum networking applications. Qubitrium provides quantum security solutions, quantum communication protocols, and quantum sensing systems for government, defense, and commercial applications, contributing to Turkey’s quantum technology capabilities and advancing quantum technologies in the Middle East and European markets. The company focuses on practical quantum applications for national security, secure communications, and quantum sensing for various industrial and scientific applications.

QuintessenceLabs

QuintessenceLabs is an Australian quantum cybersecurity company founded in 2008 that develops comprehensive quantum-safe security solutions including quantum key management systems, quantum random number generators, and post-quantum cryptography implementations, providing end-to-end quantum cybersecurity platforms that protect sensitive data and communications for government agencies, defense organizations, and enterprises against both current and future quantum computing threats, leveraging quantum physics principles to deliver cryptographic solutions with provable security guarantees and forward compatibility with emerging quantum-safe standards.

QuSecure

QuSecure is a US post-quantum cybersecurity company founded in 2019 that developed the industry’s first end-to-end post-quantum cybersecurity platform QuProtect, providing crypto-agility orchestration that protects against classical, AI, and quantum computing threats without requiring quantum hardware, selected by the US Army for enhanced post-quantum cryptography suite research and recognized with Frost & Sullivan’s 2024 Global Product Leadership Award, serving banking, healthcare, space/satellite, defense, and IT enterprises with their breakthrough QuEverywhere solution that enables quantum-safe encryption for websites and mobile applications without end-user installation requirements.

Rabobank Quantum

Rabobank investigates quantum computing applications for financial services including quantum algorithms for portfolio optimization, risk analysis, fraud detection, and quantum-safe cryptography for secure banking operations. The Dutch multinational bank explores quantum machine learning for financial modeling, derivatives pricing, and algorithmic trading systems that could provide computational advantages for complex financial calculations. Rabobank researches quantum technologies for enhancing cybersecurity measures, developing post-quantum cryptographic solutions, and preparing banking infrastructure for quantum-safe security implementations. The company collaborates with quantum technology providers and research institutions to advance practical quantum applications in banking and finance while contributing to the financial sector’s preparation for quantum computing adoption.

Thales

Thales Group develops quantum-safe communications and quantum cryptography solutions for government, defense, and enterprise applications, creating quantum key distribution systems, post-quantum cryptography implementations, and quantum-secure communication networks that protect sensitive information against both classical and quantum computing threats, providing integrated quantum security solutions for critical infrastructure, telecommunications, and defense systems requiring ultra-secure communications and data protection.

Company Information

• Founded: 2019
• Country: France
• Website: https://thalesgroup.com
• Categories: quantum security

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VeriQloud

VeriQloud is a French quantum cloud security company founded in 2017 in Paris by Marc Kaplan, Elham Kashefi, and Josh Nunn that develops quantum cryptography solutions including Qline quantum communication architecture for metropolitan fiber networks and HyQloud hybrid quantum-classical cryptography for cloud storage, providing hundreds of years of data security during communication, storage, and computing, with €1.9 million in funding from Quantonation and WinEquity and deployment by Deutsche Telekom on Berlin’s OpenQKD testbed network, participating in major European quantum initiatives including France QCI, Quantum Internet Alliance, and QuantERA HSM-QCC project to advance quantum cloud computing security.