Quantum Key Distribution
Explore 61 companies developing primary-safe communication and encryption technologies
What is QKD?
Quantum Key Distribution (QKD) is a secure communication method that uses quantum mechanics principles to generate encryption keys. Unlike classical encryption, QKD's security is based on the laws of physics rather than computational complexity, making it theoretically immune to attacks by quantum computers. Any attempt to intercept the quantum signals disturbs them in detectable ways, alerting users to eavesdropping attempts.
Key QKD Technologies
BB84 Protocol
The original QKD protocol using polarized photons. Forms the basis of most commercial QKD systems deployed today.
Satellite QKD
Uses satellites to distribute quantum keys over intercontinental distances, overcoming fiber optic range limitations.
CV-QKD
Continuous Variable QKD uses standard telecom components, enabling easier integration with existing fiber infrastructure.
QKD & Quantum Communications Companies
Abe Quantum Solutions
Abe Quantum Solutions is a Canadian quantum communication company developing quantum key distribution systems and quantum secure communication networks for enterprise and government applications. The company specializes in practical quantum cryptography implementations, quantum network infrastructure, and secure quantum communication protocols for protecting sensitive data transmission. Abe Quantum provides consulting services for quantum security implementations and develops custom quantum communication solutions for organizations requiring the highest levels of security for their data transmission and communication networks, contributing to Canada's quantum technology ecosystem and advancing quantum cryptography applications for critical infrastructure protection.
ADVA Optical
ADVA Optical Networking (now Adtran Networks following 2022 merger) is a German telecommunications equipment company founded in 1994, headquartered in Munich and Meiningen. ADVA develops quantum-safe networking solutions including quantum key distribution (QKD) integration, optical network infrastructure for quantum communications, and post-quantum cryptography implementations. The company collaborates with quantum technology providers and telecommunications operators deploying quantum-safe optical networks across Europe. ADVA serves telecommunications operators, enterprises, government agencies, and critical infrastructure sectors requiring quantum-safe communications and quantum network infrastructure. The company contributes to European quantum communication infrastructure development advancing quantum-safe networking and preparing telecommunications infrastructure for quantum internet and post-quantum security transitions protecting optical network security against quantum computing threats.
Aliro Quantum
Aliro Quantum is a US quantum networking software company founded in 2019 that develops quantum network orchestration and management software platforms for quantum communication networks, creating software solutions that enable the coordination, control, and optimization of quantum network resources across distributed quantum systems, providing network orchestration tools, quantum routing protocols, and network management systems that enable organizations to deploy, operate, and scale quantum communication networks for secure communications, distributed quantum computing, and quantum internet applications requiring sophisticated software-defined quantum networking capabilities.
Anametric
Anametric is building quantum photonic chips for cybersecurity, serving as a key part of Leidos' DARPA QuANET program after six years of development. The Austin company develops integrated photonic quantum devices. Anametric's quantum photonic chips enable secure quantum communications and quantum key distribution, addressing cybersecurity needs for defense and critical infrastructure applications.
Anritsu
Anritsu Corporation is a Japanese telecommunications test and measurement equipment manufacturer founded in 1895, headquartered in Atsugi, Kanagawa. Anritsu provides test equipment for quantum communication systems including optical network analyzers, signal analyzers, and specialized measurement instruments for quantum key distribution (QKD) networks and quantum communication infrastructure validation. The company develops testing solutions for quantum-safe telecommunications and post-quantum cryptography implementations. Anritsu serves telecommunications operators, quantum technology companies, research institutions, and quantum network developers requiring precision test equipment for quantum communication systems. The company contributes to quantum communications infrastructure development providing essential test and measurement capabilities for quantum networking deployments and quantum-safe telecommunications validation advancing quantum technology commercialization in telecommunications sector.
Antaris
Antaris is a digital space platform company founded in 2021 and headquartered in Los Altos, California, simplifying the design, simulation, and operation of satellites. In March 2024, Antaris partnered with SpeQtral to jointly deploy quantum-safe key distribution satellites, integrating SpeQtral's quantum payloads with Antaris SatOS space vehicle software and partner bus platforms. The partnership expects to deliver the first customer spacecraft to orbit from as early as 2026, enabling commercial quantum-secure satellite communications. Antaris brings expertise from Planet Labs, Microsoft, Diamanti, CoreOS, and AMD to quantum space communications. The company raised $14.16 million to develop its satellite operating system and quantum payload integration capabilities. Antaris serves government agencies, defense organizations, telecommunications operators, and commercial satellite operators requiring quantum-safe communications from space for critical infrastructure protection.
ANU Quantum Optics Group
Australian National University (ANU) Quantum Optics Group is a leading quantum research center at ANU founded in 1946 (university), developing quantum random number generation technology and quantum security solutions. In May 2022, ANU partnered with API3 to launch API3 QRNG, the first true random number generator for smart contracts using quantum vacuum fluctuations measured through balanced homodyne detection. ANU's quantum random numbers are generated from electromagnetic field vacuum fluctuations at all frequencies, providing ultra-high bandwidth truly unpredictable randomness unlike pseudo-random generators. The QRNG system is hosted on Amazon Web Services with encrypted data transmission, available free to use (only gas fees) on 13 blockchain platforms including Polygon, Avalanche, Fantom, Metis, Moonbeam, and RSK. Applications include gaming, NFTs, lotteries, crypto wallet generation, and blockchain applications requiring quantum-level unpredictability. ANU Quantum Optics Group serves blockchain platforms, gaming companies, cryptographic applications, and research institutions requiring provably random numbers from natural quantum processes for secure applications.
API3 QRNG
API3 is a Swiss blockchain technology company founded in 2020 that partnered with Australian National University (ANU) Quantum Optics Group to launch API3 QRNG in May 2022, the first true random number generator for smart contracts using quantum vacuum fluctuations. The quantum random numbers use electromagnetic field vacuum fluctuations measured through balanced homodyne detection, providing ultra-high bandwidth truly unpredictable randomness for blockchain and Web3 applications. API3 QRNG is free to use (only gas fees), available on 13 blockchain platforms including Polygon, Avalanche, Fantom, Metis, Moonbeam, and RSK. The system uses encrypted data transmission via Amazon Web Services, destroying random numbers after use for security. Applications include gaming, NFTs, lotteries, crypto wallet generation, and blockchain applications requiring quantum-level unpredictability. API3 QRNG addresses Web3 security demands by providing quantum mechanics-based randomness for decentralized applications, smart contracts, and cryptographic operations. The service serves blockchain developers, DeFi platforms, gaming applications, and cryptocurrency projects requiring provably random numbers from quantum processes.
AT&T Quantum
AT&T is researching quantum technologies for telecommunications applications including quantum key distribution, quantum-safe cryptography, and quantum networking infrastructure for secure communications. The company explores quantum technologies for network optimization, quantum-enhanced security protocols, and quantum communication systems that could provide ultra-secure connectivity for government, enterprise, and consumer applications. AT&T collaborates with quantum technology companies and research institutions to develop quantum networking capabilities, investigate quantum advantages for telecommunications infrastructure, and prepare network systems for quantum-safe security implementations. The company's quantum research focuses on practical quantum applications that could enhance network security, improve communication reliability, and enable new quantum-enhanced services for customers requiring the highest levels of security and performance.
BAE Systems Quantum
BAE Systems has established quantum technology research and development programs focused on defense and security applications, developing quantum-enhanced radar and sensing systems, secure quantum communications networks, and quantum computing applications for intelligence analysis and cybersecurity. On September 12, 2025, BAE Systems' FAST Labs and the U.S. Air Force Research Laboratory signed a three-year agreement to advance quantum sensing and networking technologies, focusing on combining multiple quantum RF sensors into arrays for new warfighter capabilities. The company invests in quantum sensing technologies for improved navigation systems that operate in GPS-denied environments, quantum-enhanced imaging and detection systems for surveillance applications, and quantum cryptography solutions for secure military communications. BAE Systems collaborates with UK government quantum initiatives, academic research institutions, and quantum technology companies including the AFRL to advance quantum capabilities for national security applications, including quantum-resistant cryptography to protect against future quantum computing threats and quantum-enhanced electronic warfare systems for modern defense challenges.
Banco de Santander Quantum Division
Banco de Santander is a Spanish multinational financial services company founded in 1857 and headquartered in Madrid, Spain, with Quantum Division focusing on quantum-safe financial services and quantum cryptography implementations. Santander participates in Spain's QKD-GEO quantum key distribution geostationary satellite mission analyzing real use cases with Hispasat, BBVA, Telefónica, and Cellnex for quantum-secure banking communications. The bank invests in quantum-safe security technologies preparing financial infrastructure for post-quantum cryptography era and quantum computing threats to current encryption protecting financial transactions and customer data. Santander explores quantum key distribution for ultra-secure banking communications, post-quantum cryptography for protecting financial data, and quantum-safe blockchain implementations for digital banking services. The company collaborates with quantum security providers implementing NIST-approved PQC algorithms across banking infrastructure. Banco de Santander serves global banking markets requiring quantum-safe financial services, secure payment systems, and quantum-resistant cryptography protecting customer transactions, financial data, and banking communications against quantum computing threats.
BBVA Quantum Division
Banco Bilbao Vizcaya Argentaria (BBVA) is a Spanish multinational financial services company founded in 1857 (origins) and headquartered in Madrid, Spain, with Quantum Division developing quantum-safe banking technologies and post-quantum cryptography implementations. BBVA participates in Spain's QKD-GEO quantum key distribution geostationary satellite mission analyzing real use cases with Hispasat, Banco de Santander, Telefónica, and Cellnex for quantum-secure financial communications. The bank invests in quantum computing research, quantum-safe security technologies, and post-quantum cryptography preparing financial infrastructure for quantum computing threats to current encryption standards. BBVA explores quantum key distribution for ultra-secure interbank communications, post-quantum cryptography algorithms for protecting financial transactions, and quantum-safe blockchain for digital banking services. The company collaborates with quantum security providers implementing quantum-resistant cryptography across banking systems. BBVA serves global financial markets requiring quantum-safe banking infrastructure, secure payment systems, and quantum-resistant encryption protecting customer data, financial transactions, and banking communications against emerging quantum computing capabilities threatening current cryptographic systems.
Bell Canada
Bell Canada (formally The Bell Telephone Company of Canada) is a Canadian telecommunications company founded in 1880, headquartered in Montreal, Quebec, part of BCE Inc. Bell Canada explores quantum networking research including quantum key distribution (QKD) trials and quantum-safe telecommunications infrastructure. The company collaborates with Canadian quantum technology companies and research institutions including University of Waterloo advancing quantum communications capabilities. Bell investigates quantum encryption for secure telecommunications and quantum networking for future communications infrastructure. The company serves Canadian telecommunications markets, enterprise customers, and government agencies requiring quantum-safe communications and quantum technology exploration. Bell contributes to Canadian quantum technology ecosystem advancing quantum communications research and quantum networking for telecommunications industry supporting Canada quantum technology leadership.
Blackhills Quantum
Blackhills Quantum is Belgium's leading cybersecurity company providing quantum secure cloud solutions and consulting services for quantum-enabled data security. The company specializes in QKD (Quantum Key Distribution), PQC (Post-Quantum Cryptography), and QRNG (Quantum Random Number Generation) implementations. Founded in Hasselt, Belgium, Blackhills offers vendor-neutral, crypto-agile solutions following a hybrid approach for quantum security services and products. Their flagship QS DOME product provides quantum security for public and private cloud environments. The company has established strategic partnerships with defense contractors and cybersecurity firms to enhance quantum security solutions. Blackhills claims to be the only consultancy firm with over 3 years of experience in the quantum security field, offering worldwide quantum governance, validation and verification services. They also maintain a US presence through Blackhills Quantum Computing USA LLC in Dover, Delaware.
BT Group
BT Group plc (formerly British Telecom) is a British multinational telecommunications company founded in 1846, headquartered in London, United Kingdom. BT conducts pioneering quantum networking research deploying quantum key distribution (QKD) networks and quantum-safe telecommunications infrastructure. The company established quantum-secured network connections and collaborates with quantum technology providers advancing practical quantum communications deployments. BT invests in post-quantum cryptography preparing telecommunications infrastructure for quantum computing threats. BT serves UK telecommunications markets, enterprise customers, government agencies, and critical infrastructure sectors requiring quantum-safe communications and quantum network infrastructure. The company contributes to UK National Quantum Technologies Programme advancing quantum communications and quantum networking for telecommunications industry. BT positions UK as leader in quantum-safe telecommunications protecting communications infrastructure against emerging quantum computing threats.
CAS Key Laboratory of Quantum Information
CAS Key Laboratory of Quantum Information is a Chinese Academy of Sciences quantum research lab based at University of Science and Technology of China (USTC), serving as a major quantum computing and communication research center. The laboratory has produced groundbreaking quantum research. CAS Key Laboratory has been instrumental in China's quantum technology achievements including quantum satellite communications, long-distance QKD, and superconducting quantum computing advances.
Cellnex Quantum Division
Cellnex Telecom is a Spanish telecommunications infrastructure and services company founded in 2015 and headquartered in Barcelona, Spain, with Quantum Division supporting quantum-safe satellite communications development and quantum networking infrastructure. Cellnex participates in Spain's QKD-GEO quantum key distribution geostationary satellite mission led by Thales Alenia Space and Hispasat, analyzing real use cases with banking sector and terrestrial operators for quantum-secure communications. The company collaborates with Hispasat, Banco de Santander, BBVA, and Telefónica defining business plans for quantum-safe satellite and terrestrial network integration. Cellnex operates telecommunications tower infrastructure across Europe providing potential backbone for quantum-safe communications networks. The company invests in next-generation secure communications technologies including quantum key distribution and post-quantum cryptography preparing infrastructure for quantum computing threats. Cellnex serves telecommunications operators, mobile network operators, broadcasters, and infrastructure sectors requiring quantum-safe communications capabilities and tower infrastructure supporting quantum networking deployments across European markets.
China Mobile
China Mobile Limited is a Chinese state-owned telecommunications company founded in 1997, headquartered in Beijing, China, world's largest mobile network operator by subscribers. China Mobile deploys quantum communication networks including quantum key distribution (QKD) infrastructure and quantum-safe telecommunications systems across China. The company collaborates with Chinese quantum technology companies advancing practical quantum communications deployments for secure mobile communications and quantum internet development. China Mobile invests in quantum networking research supporting China national quantum communications infrastructure. The company serves Chinese telecommunications markets including enterprise customers, government agencies, and critical infrastructure requiring quantum-safe communications. China Mobile contributes to China quantum technology leadership advancing quantum communications at scale and quantum networking for telecommunications industry representing Chinese telecommunications quantum capabilities.
China Telecom
China Telecommunications Corporation (China Telecom) is a Chinese state-owned telecommunications company founded in 2000, headquartered in Beijing, China. China Telecom deploys quantum communication infrastructure including quantum key distribution (QKD) networks as part of China national quantum strategy. The company demonstrated quantum encrypted video conferencing and quantum secure communications for government and enterprise clients. China Telecom collaborates with Chinese quantum technology providers advancing practical quantum communications deployments across China. The company invests in quantum networking research supporting quantum internet development. China Telecom serves telecommunications markets including enterprises government and critical infrastructure requiring quantum-safe communications. The company contributes to China quantum technology leadership advancing large-scale quantum communications networks and quantum-safe telecommunications infrastructure representing Chinese national quantum capabilities.
China Unicom
China United Network Communications Group Co., Ltd. (China Unicom) is a Chinese state-owned telecommunications operator founded in 1994, headquartered in Beijing, China. China Unicom deploys quantum communication networks including quantum key distribution (QKD) infrastructure as part of China national quantum communications strategy. The company collaborates with Chinese quantum technology companies advancing practical quantum communications deployments for secure telecommunications. China Unicom invests in quantum networking research supporting quantum internet development and quantum-safe communications infrastructure. The company serves Chinese telecommunications markets including enterprise customers government agencies and critical infrastructure requiring quantum-safe communications. China Unicom contributes to China quantum technology leadership advancing quantum communications networks at national scale and quantum networking for telecommunications industry representing Chinese telecommunications quantum infrastructure development.
Ciena
Ciena Corporation is an American telecommunications networking equipment and software services company founded in 1992, headquartered in Hanover, Maryland. Ciena develops quantum-safe networking solutions including quantum key distribution (QKD) integration, post-quantum cryptography implementations, and quantum-secure optical networks. The company WaveLogic coherent optical technology supports quantum communication infrastructure and quantum networking deployments. Ciena collaborates with telecommunications operators and quantum technology providers advancing quantum-safe network infrastructure. The company serves global telecommunications markets, enterprise networks, cloud providers, and government agencies requiring quantum-safe communications and post-quantum security. Ciena invests in quantum networking research preparing telecommunications infrastructure for quantum internet and quantum-enhanced networking protecting network security against emerging quantum computing threats to current encryption standards.
Cottonwood Technology Fund
Cottonwood Technology Fund is a Dutch venture capital firm founded in 2013, investing in early-stage technology companies including quantum security and deep tech startups. In May 2024, Cottonwood jointly led Q*Bird's 2.5 million euro funding round with QDNL Participations, supporting Dutch quantum key distribution company. The firm focuses on deep tech investments in Netherlands and Europe, including quantum technologies, photonics, advanced materials, and cybersecurity. Cottonwood Technology Fund brings capital and strategic expertise to quantum communications companies, quantum security startups, and photonic quantum technology developers. The firm identifies and supports early-stage companies commercializing quantum research from Dutch universities and research institutions. Cottonwood serves Dutch and European quantum technology ecosystem connecting startups with industry partners, research institutions, and follow-on investors. The firm invests in quantum communications, quantum cryptography, quantum networking, and quantum security companies building practical commercial quantum technologies. Cottonwood Technology Fund contributes to Netherlands quantum technology leadership supporting growth of quantum innovation ecosystem.
Craft Prospect
Craft Prospect is a British space technology and satellite communications company founded in 2013, participating in the QKDSat consortium led by Honeywell to develop ultra-secure telecommunications satellites using quantum key distribution technology. The consortium includes Redwire Space, British Telecom, QTLabs Austria, Honeywell Canada, and key players in Germany, Czech Republic, and Switzerland. Craft Prospect brings satellite systems engineering and space technology expertise to quantum-secured satellite communications development. The company collaborates with European Space Agency and industry partners advancing quantum communications infrastructure for government, defense, and commercial applications. Craft Prospect serves government agencies, defense contractors, telecommunications operators, and satellite communication providers requiring quantum-safe satellite systems and space-based secure communications. The company focuses on integrating quantum key distribution technology into satellite platforms, developing operational quantum-secured satellite communications systems protecting critical infrastructure and sensitive government communications from cyber threats and quantum computing attacks.
Deutsche Telekom
Deutsche Telekom AG is a German telecommunications company founded in 1995 headquartered in Bonn conducting pioneering quantum communications research and deployments. In 2023 Deutsche Telekom and Qunnect succeeded in stable transmission of entangled photons over 82 kilometers establishing milestone in quantum networking. Deutsche Telekom opened Quantum Lab in Berlin in 2023, a test laboratory including research fiber optic network allowing testing of latest quantum communication technology and quantum security concepts. The company develops quantum key distribution networks for ultra-secure communications and explores quantum networking for telecommunications infrastructure. Deutsche Telekom serves telecommunications operators enterprises government agencies and defense sectors requiring quantum-safe communications and quantum network infrastructure for critical data transmission.
Ericsson Quantum
Ericsson is advancing quantum technologies through research in quantum communications, quantum key distribution, and quantum-safe security for telecommunications networks. The company investigates quantum networking solutions for 6G networks, quantum cryptography for secure communications infrastructure, and quantum-enhanced mobile network optimization. Ericsson collaborates with quantum technology companies and research institutions to develop quantum communication protocols, quantum network architectures, and post-quantum cryptographic solutions for telecommunications equipment and network infrastructure. The company's quantum initiatives focus on preparing telecommunications networks for the quantum era, developing quantum-safe security measures, and exploring quantum technologies that could enhance network performance, security, and capabilities for next-generation wireless communications systems.
Eurofiber
Eurofiber is a European telecommunications and fiber optic network provider founded in 2000, headquartered in Amsterdam, Netherlands, deploying quantum key distribution technology across its extensive fiber network. In February 2025, Eurofiber and Q*Bird were awarded 1 million euros at Mobile World Congress Barcelona for their Quantum Key Distribution project by Dutch government. In October 2024, Eurofiber collaborated with Q*Bird to integrate QKD technology into Eurofiber's extensive fiber optic network connecting quantum communication networks in Amsterdam and Rotterdam. In April 2024, QuTech and Eurofiber ran quantum cryptography on existing fiber in an open testbed, demonstrating practical QKD deployment on operational telecommunications infrastructure. The project strengthens collaboration between network provider Eurofiber and quantum security company Q*Bird advancing quantum-safe communications infrastructure in Netherlands. Eurofiber serves telecommunications operators, enterprises, data centers, government agencies, and financial institutions requiring quantum-safe network connectivity and secure communications infrastructure preparing for quantum computing threats to current encryption standards.
European Space Agency
The European Space Agency (ESA) develops quantum technologies for space applications through various quantum research programs and initiatives, investigating quantum communication satellites, quantum sensing for space exploration, quantum navigation systems, and quantum computing applications for space missions, conducting research in quantum key distribution via satellite networks, quantum-enhanced sensing for Earth observation, and quantum technologies for deep space communication, collaborating with European quantum technology companies and research institutions to advance space-based quantum systems that could revolutionize secure communications, precision navigation, and scientific measurements in space environments.
Findus Venture
Findus Venture is an Austrian venture capital firm founded in 2018, investing in deep tech and early-stage technology companies including quantum security startups. In March 2025, Findus Venture co-led Quantum Industries' 9.5 million euro seed financing round alongside Sparring Capital Partners and KGAL, supporting Vienna-based quantum secure communications company. The firm focuses on deep tech investments in Austria and Central Europe, including quantum technologies, advanced materials, photonics, and cybersecurity. Findus Venture brings investment capital and strategic support to quantum communications companies, quantum key distribution developers, and quantum security innovators. The firm identifies and supports early-stage companies commercializing quantum research from Austrian universities and research institutions including IQOQI Vienna and Austrian Academy of Sciences. Findus serves Austrian quantum technology ecosystem connecting startups with research centers, corporate partners, and international investors. The firm invests in quantum security, quantum communications, quantum sensing, and quantum computing companies building practical quantum technologies. Findus Venture contributes to Austrian quantum technology leadership supporting growth of Vienna quantum innovation ecosystem.
Guangdong Provincial Key Laboratory of Quantum Engineering
Guangdong Provincial Key Laboratory of Quantum Engineering focuses on quantum communication and quantum computing device development. The provincial research lab advances quantum technologies in southern China. The laboratory works on quantum communication networks, quantum cryptography devices, and quantum computing hardware to support Guangdong Province's quantum technology industry development.
HEQA Security
HEQA Security (formerly QuantLR) is an Israeli quantum security company founded in 2018, committed to safeguarding data communication against cyber threats posed by quantum computers. The company focuses on building carrier-grade quantum key distribution (QKD) offerings with products used by world-leading telecom operators, defense organizations, global cloud providers, and financial institutions. HEQA Security ensures protection of data communication against potential threats through groundbreaking security solutions rooted in principles of quantum physics. Leveraging a patented design, HEQA Security's products stand out as the market's most cost-effective and scalable enterprise-grade Quantum Key Distribution solution. The company brings quantum leap for secure communication to telecommunications and enterprise markets. HEQA Security serves telecommunications operators, government agencies, defense contractors, financial institutions, and cloud service providers requiring carrier-grade QKD infrastructure for ultra-secure communications protecting against both classical eavesdropping and quantum computing threats to encryption.
Hispasat
Hispasat is Redeia's satellite services operator founded in 1989 and headquartered in Madrid, Spain, operating satellites providing telecommunications services across Europe, Americas, and North Africa. In January 2025, Hispasat partnered with Thales Alenia Space to start development, manufacturing, verification, and validation phase of the QKD-GEO prototype, Spain's quantum key distribution system from geostationary orbit. The QKD-GEO mission has a budget of 103.5 million euros and 24-month timeline to develop components for quantum key distribution from geostationary orbit, including quantum payload for geostationary satellite and associated ground segment. Hispasat is responsible for designing the geostationary mission and defining the business plan, with support from Banco de Santander, BBVA, Telefónica, and Cellnex analyzing real use cases with banking sector and terrestrial operators. A field test campaign is planned between Spanish islands of La Palma and Tenerife covering 140-km atmospheric link. Hispasat serves telecommunications operators, government agencies, financial institutions, and critical infrastructure requiring quantum-secure satellite communications.
Honeywell Quantum Communications
Honeywell is a multinational technology and manufacturing company founded in 1906, headquartered in Charlotte, North Carolina, with Quantum Communications division developing quantum-secured satellite communications systems. Honeywell leads the QKDSat consortium, a public-private partnership announced in 2024 aiming to develop ultra-secure telecommunications satellites using quantum key distribution technology. In September 2025, Honeywell signed MOU with Redwire Corporation to combine Redwire's quantum platform technology with Honeywell's quantum optical payload, creating fully functional payload and platform by mid-2026. The consortium includes Redwire Space of Belgium; Craft Prospect and British Telecom of the United Kingdom; QTLabs of Austria; Honeywell in Canada; and key players in Germany, Czech Republic, and Switzerland. Honeywell partnered with European Space Agency for quantum data protection from space. The company serves government agencies, defense contractors, telecommunications operators, and critical infrastructure sectors requiring quantum-secured satellite communications protecting sensitive information transmission against cyber threats.
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. December 2025: Deployed Slovakia's first national quantum communication network as part of the EU-wide EuroQCI initiative. The skQCI project, developed with Institute of Physics Slovak Academy of Sciences, securely interconnects Slovakia's Presidential Palace, National Security Authority, and Quantum Pavilion of the Slovak Academy of Sciences in Bratislava. November 2025: Expanded QKD network deployments across European financial institutions and government agencies. 2025 Developments: Acquired by IonQ for approximately $250 million, becoming IonQ's subsidiary for quantum networking. Continued expansion of QKD network deployments and quantum-safe security solutions.
InfiniQuant
InfiniQuant is a German quantum technology company hosted at Max Planck Institute for the Science of Light, using quantum mechanics to generate true random numbers at high speed with research-grade quantum random number generators harnessing quantum randomness for quantum cryptography devices. Led by Imran Khan and Christoph Marquardt from Gerd Leuchs' division, InfiniQuant investigates applications in quantum communication with research programs including Metropolitan Quantum Communication, Satellite Quantum Communication, and Quantum Random Number Generation. The company provides QRNG technology for secure communications and cryptographic applications requiring provably random numbers from quantum processes. InfiniQuant is recognized among leading QRNG suppliers in industry market analyses alongside ID Quantique, KETS, and PicoQuant. Based at Germany's premier quantum optics research center, InfiniQuant bridges fundamental quantum communication research with practical QRNG applications for cryptography, secure communications, and quantum networking infrastructure.
InnovationQuarter
InnovationQuarter is the regional development agency for Zuid-Holland province in the Netherlands, founded in 2005 and based in The Hague, investing in innovative companies including quantum technology and quantum security startups. InnovationQuarter participated in Q*Bird's 2.5 million euro funding round in May 2024, supporting Delft-based quantum key distribution company. The organization provides investment capital, business development support, and ecosystem connections to high-tech startups and scale-ups in Zuid-Holland region, home to quantum technology clusters in Delft, Leiden, and Rotterdam. InnovationQuarter focuses on deep tech including quantum technologies, photonics, life sciences, and cleantech. The organization serves Zuid-Holland quantum ecosystem connecting startups with QuTech research center, TNO, universities, and corporate partners. InnovationQuarter invests in quantum communications, quantum security, quantum sensing, and quantum computing companies commercializing research from Delft University of Technology and Leiden University. The organization contributes to Netherlands quantum technology leadership building innovation infrastructure and supporting growth of quantum startups in one of Europe's leading quantum technology regions.
Institute of Astrophysics of the Canary Islands Quantum Division
Institute of Astrophysics of the Canary Islands (IAC) is a Spanish astrophysics research center founded in 1982 and headquartered in La Laguna, Tenerife, Spain, with Quantum Division participating in Spain's QKD-GEO quantum key distribution geostationary satellite mission. IAC participates in the large industrial consortium led by Thales Alenia Space developing quantum communications technology for space-based quantum key distribution. The institute brings astrophysics expertise and Canary Islands astronomical facilities to quantum communications research and testing. A field test campaign is planned between Spanish islands of La Palma and Tenerife covering 140-km atmospheric link, validating ground segment and quantum payload functionality under representative conditions before implementing operational mission in orbit. IAC collaborates with Polytechnic University of Madrid, University of Vigo, Thales Alenia Space, and Hispasat advancing quantum communications from space. The institute serves European Space Agency, quantum technology companies, and research institutions requiring space-based quantum communications research, atmospheric quantum transmission testing, and ground station development for satellite QKD systems.
KDDI
KDDI Corporation is a Japanese telecommunications operator founded in 1984, headquartered in Tokyo, Japan. KDDI conducts quantum networking research deploying quantum key distribution (QKD) networks and quantum-safe telecommunications infrastructure in Japan. The company collaborates with quantum technology providers advancing practical quantum communications deployments including quantum encryption for secure communications. KDDI explores quantum networking technologies for ultra-secure telecommunications and quantum internet infrastructure development. The company serves Japanese telecommunications markets, enterprise customers, and government agencies requiring quantum-safe communications and quantum network infrastructure. KDDI contributes to Japan National Quantum Technology Innovation Strategy advancing quantum communications and quantum networking for telecommunications industry positioning Japan as quantum technology leader in Asia-Pacific region protecting telecommunications infrastructure against quantum computing threats.
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 University of Bristol spinout, pioneering chip-scale QKD devices. April 2025: Completed £1.7M Innovate UK contract to develop scalable, server-sized QKD prototype for critical infrastructure. BT consulted on design and now testing prototype. Called 'leader in quantum network components' by Innovate UK. November 2025: CEO Lisa Matthews warned UK needs Quantum Sovereign Wealth Fund or risks losing quantum companies, talent, and IP to foreign markets. Noted several UK firms (PsiQuantum, Universal Quantum, Oxford Ionics) shifted operations abroad due to limited domestic scale-up capital. Products: QKD (Quantum Key Distribution) and QRNG (Quantum Random Number Generators). Targets defense, finance, critical infrastructure, telecoms. Series A company with $4.39M funding from Speedinvest and Quantonation.
KGAL Investment Management
KGAL is a German global asset manager specializing in infrastructure investments, founded in 1968 and headquartered in Grünwald near Munich, Germany. In March 2025, KGAL participated in Quantum Industries' 9.5 million euro seed financing round alongside Sparring Capital Partners and Findus Venture, supporting Vienna-based quantum secure communications company. KGAL focuses on infrastructure investments including critical infrastructure, telecommunications, energy, and transportation sectors increasingly requiring quantum-safe security technologies. The firm brings infrastructure investment expertise and strategic capital to quantum security companies developing solutions for critical infrastructure protection. KGAL recognizes quantum-safe communications as essential infrastructure technology protecting against quantum computing threats to current encryption standards. The firm serves infrastructure operators, utilities, telecommunications providers, and critical infrastructure sectors requiring quantum security investments. KGAL invests in quantum key distribution, quantum-safe communications, and quantum security technologies protecting critical infrastructure communications, energy grid control systems, and transportation networks. The firm contributes to European infrastructure security supporting deployment of quantum-safe technologies for critical national infrastructure.
KPN
Koninklijke KPN N.V. (Royal KPN) is a Dutch telecommunications and IT provider founded in 1989 (privatized from PTT), headquartered in Rotterdam, Netherlands. KPN explores quantum communications including quantum key distribution (QKD) trials and quantum-safe telecommunications infrastructure. The company collaborates with Dutch quantum technology companies and QuTech research center advancing practical quantum communications deployments. KPN investigates post-quantum cryptography and quantum networking capabilities for telecommunications infrastructure. The company serves Netherlands telecommunications markets enterprises and government agencies requiring quantum-safe communications. KPN contributes to Netherlands quantum technology ecosystem advancing quantum communications research and quantum networking for telecommunications industry supporting Dutch quantum technology leadership protecting telecommunications infrastructure against quantum computing threats.
KT Corporation
KT Corporation (formerly Korea Telecom) is a South Korean telecommunications company founded in 1981, headquartered in Seongnam, South Korea. KT conducts quantum communications research deploying quantum key distribution (QKD) networks and quantum-safe security for telecommunications infrastructure. The company demonstrated quantum cryptography implementations and quantum network trials in South Korea. KT collaborates with Korean quantum technology companies and research institutions advancing quantum communications commercialization. The company explores quantum networking for 5G security and future telecommunications infrastructure. KT serves Korean telecommunications markets, enterprise customers, and government agencies requiring quantum-safe communications. KT contributes to South Korea quantum technology strategy advancing quantum communications and quantum security for telecommunications industry positioning South Korea as quantum technology leader protecting telecommunications networks against quantum computing threats.
KuSpace Tech
KuSpace Technologies (also spelled CuSpace or QSpace Technologies) is a Russian startup founded in 2018, partnering with MISIS University and Russian Quantum Center (RQC) on satellite quantum key distribution experiments providing ground station equipment for quantum satellite links. Scientists from MISIS, RQC, and KuSpace conducted joint experiment on quantum cryptography transmission between Russia and China beginning work with China's Mo-tzu (Mozi) quantum satellite in 2019. The ground station in Zvenigorod created by KuSpace enabled exchange of encoded images with Chinese ground station in Nanshan demonstrating quantum-encrypted communication over 3,800 km between station near Moscow and Urumqi via Mozi satellite. In summer 2023, prototype quantum satellite Impulse-1 developed by NUST MISIS and KuSpace Technologies launched from Vostochny cosmodrome with equipment for testing laser communication channels. KuSpace provides quantum satellite communication technologies and ground station infrastructure supporting Russia's quantum communication network development and international quantum cryptography collaborations.
Lumenisity
Lumenisity is a UK-based photonics company founded in 2017 as spinout from University of Southampton developing hollow core fiber technology for quantum communications and telecommunications. The company CoreSmart hollow core fibers enable ultra-low latency data transmission and enhanced security ideal for quantum key distribution (QKD) networks. Lumenisity was acquired by Microsoft in 2022 to advance hollow core fiber deployment for cloud and quantum networking infrastructure. The company technology reduces signal latency and improves data security compared to traditional solid core optical fibers. Lumenisity serves telecommunications operators, financial services, cloud providers, and quantum communication networks requiring ultra-fast secure data transmission. The company contributes to quantum communications infrastructure development advancing quantum-safe networking and quantum internet infrastructure.
Orange Quantum Division
Orange S.A. is a French multinational telecommunications corporation founded in 1990 (originally France Télécom from 1988) and headquartered in Paris, France, with Quantum Division developing quantum-safe telecommunications infrastructure and quantum networking capabilities. Orange conducts quantum networking research deploying quantum key distribution (QKD) networks and quantum-safe communications systems across French and European telecommunications infrastructure. The company collaborates with French quantum technology companies and research institutions including CryptoNext Security, Alice & Bob, and Pasqal advancing practical quantum communications deployments. Orange invests in post-quantum cryptography preparing telecommunications infrastructure for quantum computing threats. The company demonstrated quantum-secured fiber optic network connections for enterprise and government customers requiring ultra-secure communications. Orange serves European telecommunications markets, government agencies, financial institutions, and critical infrastructure sectors requiring quantum-safe communications and quantum network infrastructure. The company contributes to European Quantum Communication Infrastructure (EuroQCI) initiative and French National Quantum Strategy advancing quantum-safe telecommunications at scale.
Photarix
Photarix is a 2024-2025 Lancaster University spinout developing Quantum Ring Single-Photon Light-Emitting Diodes (QR SPLEDs) for Quantum Key Distribution - compact, low-cost, room-temperature operation. Founded by Gizem Acar Tekin (CEO) and Professor Manus Hayne (Chief Scientific Officer). November 2025: Showcased at UK National Quantum Technologies Showcase in London. 2026: Invited to host stand at International Cyber Expo in London. First Lancaster spinout through NW CyberCom programme. Funding: European Commission Horizon 2020 (Quantimony doctoral network), Innovate UK Future Telecoms ICURe programme, Research England NW CyberCom (£1.2M initiative). Applications: quantum-secure communications for banking, messaging, data storage. Technology enables on-demand single-photon emission at telecom wavelengths without cryogenic cooling.
Photon Spot
Photon Spot is a California-based company specializing in sub-Kelvin cryogenic systems and superconducting nanowire single-photon detectors (SNSPDs) for quantum technology applications. Founded in 2009 and headquartered in Monrovia, California, the company offers detectors with ultralow dark counts, precise timing resolution, and high quantum efficiency, combined with cryogenic systems operating at temperatures below 1 Kelvin. Photon Spot's products serve quantum communications, quantum computing, quantum sensing, and semiconductor diagnostics applications. The company's ultra-compact, ultra-low vibration cryogenic systems support time-resolved imaging applications benefiting integrated circuit manufacturers and quantum technology researchers. Primary customers include research institutions, national laboratories, and companies engaged in quantum-related research and development. Backed by investors including the National Science Foundation, Photon Spot represents American innovation in single-photon detection technology critical to photonic quantum computing, quantum key distribution, and quantum metrology applications.
Polytechnic University of Madrid Quantum Division
Polytechnic University of Madrid (Universidad Politécnica de Madrid - UPM) is a Spanish public research university founded in 1971 and headquartered in Madrid, Spain, with Quantum Division participating in Spain's QKD-GEO quantum key distribution geostationary satellite mission. UPM is part of the large industrial consortium led by Thales Alenia Space developing quantum communications technology for space-based quantum key distribution systems. The university brings telecommunications engineering and quantum communications research expertise to satellite QKD development. UPM collaborates with Institute of Astrophysics of the Canary Islands, University of Vigo, Thales Alenia Space, and Hispasat advancing quantum-safe satellite communications. The university conducts research in quantum cryptography, quantum optics, and quantum communications protocols for satellite applications. UPM serves European quantum communications research community, quantum technology companies, and government agencies requiring quantum communications research, quantum networking protocols development, and satellite QKD systems engineering. The university contributes to Spanish national quantum strategy and European Quantum Communication Infrastructure (EuroQCI) initiative.
QNu Labs
QNu Labs is an Indian quantum security company providing quantum random number generators and quantum key distribution systems for enterprise security applications. The company manufactures QRNG hardware and QKD systems designed for securing sensitive communications in banking, government, and defense sectors. QNu Labs is part of India's national quantum mission to develop sovereign quantum security capabilities. November 2025: QNu Labs successfully demonstrated a 500-kilometer quantum key distribution testbed, marking a significant milestone for India's quantum communications infrastructure. The deployment uses indigenous QRNG and QKD systems for securing critical national communications. 2025 Developments: Expanded QKD network deployments across Indian banking and government sectors. Advanced development of indigenous quantum security solutions supporting India's National Quantum Mission. Deployed quantum-secured communication links for critical infrastructure applications.
Quantum Optics Jena GmbH
Quantum Optics Jena is a Fraunhofer IOF spin-off specializing in entangled photon pair sources, polarization analyzers, and QKD systems for secure communications. The company completed a seven-figure euro seed funding round in 2021 to commercialize quantum photonic components. Quantum Optics Jena provides the Elvis QKD system for both fiber network and satellite quantum communication applications, offering complete solutions from photon sources to encryption systems for quantum-safe communications infrastructure.
Quantum Xchange
Quantum Xchange is a US cybersecurity company specializing in quantum key distribution and post-quantum cryptography to protect data against quantum and classical threats. The company operates quantum-safe key distribution networks and provides integrated security solutions combining QKD with post-quantum cryptographic algorithms. Quantum Xchange serves financial services, healthcare, and government sectors with quantum-safe security infrastructure, helping organizations prepare for the quantum computing threat to current encryption systems.
Redwire Corporation
Redwire Corporation is a space infrastructure company headquartered in Jacksonville, Florida, founded in 2020, specializing in space systems and components. In September 2025, Redwire signed a Memorandum of Understanding with Honeywell to advance the QKDSat project, combining Redwire's quantum platform technology with Honeywell's quantum optical payload to create fully functional quantum-secured satellite communications systems by mid-2026. The QKDSat consortium, led by Honeywell and including Redwire, aims to develop ultra-secure telecommunications satellites using quantum key distribution for government, defense, and commercial applications. The project is backed by the European Space Agency and aims to protect critical infrastructure from cyber threats using quantum encryption. Redwire brings deep space hardware expertise and satellite bus platform development to enable quantum-safe communications from orbit for government agencies, defense contractors, telecommunications operators, and critical infrastructure sectors.
S-Fifteen Instruments Pte Ltd
S-Fifteen Instruments is a Singapore company developing quantum communication devices including quantum random number generators and QKD systems. The company manufactures QRNG hardware, QKD equipment, and quantum optics components for quantum communication networks. S-Fifteen Instruments serves the growing quantum communications market in Asia-Pacific, providing quantum hardware components for secure communications infrastructure and quantum networking applications.
Sparring Capital Partners
Sparring Capital Partners is a European venture capital firm founded in 2019, focusing on deep tech and enterprise software investments including quantum security companies. In March 2025, Sparring Capital Partners led Quantum Industries' 9.5 million euro seed financing round alongside Findus Venture and KGAL, supporting Vienna-based quantum secure communications company. The firm invests in early-stage and growth-stage technology companies developing quantum cryptography, cybersecurity, enterprise software, and deep tech solutions. Sparring Capital Partners brings capital, strategic expertise, and industry connections to quantum security startups commercializing quantum communications technologies. The firm serves European quantum technology ecosystem connecting startups with corporate partners, research institutions, and follow-on investors. Sparring Capital invests in quantum key distribution companies, post-quantum cryptography developers, quantum networking startups, and quantum-safe communications providers building practical commercial quantum security solutions. The firm contributes to European quantum technology growth supporting companies developing quantum-safe infrastructure for critical communications, government agencies, financial institutions, and telecommunications operators.
SPTel
SPTel is a joint venture company of ST Engineering and SP Group, serving as a leading provider of next-generation telecommunications and digital solutions in Singapore with strong focus on innovation and reliability. SPTel uses unique fiber pathways combining leased SP Group infrastructure and owned fiber pipes laid alongside power network cables, having connected 90% of Singapore's commercial data centers. In November 2022, SPTel and SpeQtral announced success on initial trials toward setting up Quantum-Secure Networks on SPTel's diverse fiber network, the first such trials in Singapore. In November 2023, SPTel and SpeQtral were jointly appointed by the Infocomm Media Development Authority of Singapore (IMDA) to build the National Quantum-Safe Network Plus (NQSN+), Singapore's first nationwide quantum-safe network. The combination of SPTel's capabilities in building diverse networks with SpeQtral's deep expertise in Quantum Key Distribution (QKD) technology advances development of robust and resilient NQSN+. SPTel serves enterprises, government agencies, data centers, and telecommunications operators requiring quantum-safe network infrastructure.
Synergy Quantum
Synergy Quantum SA is a Swiss deep-tech startup founded in 2018 in Geneva, delivering quantum-secure communication solutions for the post-quantum era. The company leverages Quantum Key Distribution (QKD) and post-quantum cryptography to protect critical data for governments and enterprises. Synergy Quantum's technology was developed with CERN scientists and through investments in quantum companies and collaboration with national science and defense ministries. In 2021, the company produced a Post-Quantum Encrypted future-proof closed communication network and filed patents. Synergy Quantum completed a pre-series A funding round led by Swiss and international investors, raising $10M total. The company is part of Microsoft for Start-ups Program and is participating in TECH4TRUST Season 6 (2024-2025). Synergy Quantum signed an agreement with the Indian Government for a joint venture in quantum technologies, developing high-impact solutions across finance, healthcare, and cybersecurity sectors.
Telsy
Telsy is an Italian cybersecurity company that expanded into quantum key distribution and quantum-safe security solutions for government and defense applications. With decades of experience in cryptography and secure communications, Telsy provides QKD systems and post-quantum cryptography solutions to protect critical national security communications. The company serves Italian government, defense, and critical infrastructure sectors with quantum-enhanced security technologies integrated into national secure communications networks.
Thales Alenia Space Quantum Division
Thales Alenia Space is a joint venture between Thales (67%) and Leonardo (33%), founded in 2007 and headquartered in Cannes, France, with quantum technology division developing space-based quantum communications systems. In January 2025, Thales Alenia Space partnered with Hispasat to develop the QKD-GEO prototype, Spain's quantum key distribution system from geostationary orbit, with 103.5 million euro budget. Thales Alenia Space leads a large industrial consortium including Spanish and European companies, with participation from entities specialized in quantum communications: Institute of Astrophysics of the Canary Islands (IAC), Polytechnic University of Madrid, and University of Vigo. The company develops quantum payloads for geostationary satellites and associated ground segments for quantum-secure communications from space. Field test campaigns are planned between La Palma and Tenerife covering 140-km atmospheric links. Thales Alenia Space serves government agencies, defense organizations, telecommunications operators, and critical infrastructure sectors requiring satellite-based quantum key distribution for ultra-secure space-to-ground communications.
Toshiba Quantum Technology Division
Toshiba Quantum Technology Division is based in Cambridge, United Kingdom, headed by Andrew Shields, operating as part of Toshiba Europe Limited's Cambridge Research Laboratory. Toshiba started quantum cryptography research in 1999 and manufactures the Multiplexed QKD System at their Cambridge UK base. In March 2025, Toshiba Europe Limited launched a commercial QKD system integrating post-quantum cryptography (PQC) using NIST's ML-KEM standard, offering enhanced quantum-safe security. In May 2024, Toshiba developed a QRNG fully integrated into semiconductor chips ready for mass manufacture. The division demonstrated record-breaking QKD transmission distances and pioneered quantum-secured network deployments across Europe and Asia. Toshiba collaborates with telecommunications operators including BT Group and global financial institutions to deploy quantum-safe communications infrastructure. The company serves telecommunications operators, government agencies, financial institutions, and critical infrastructure sectors requiring commercial-grade quantum key distribution systems and quantum-safe networking equipment.
University of Vigo Quantum Division
University of Vigo (Universidade de Vigo) is a Spanish public research university founded in 1989 and headquartered in Vigo, Galicia, Spain, with Quantum Division participating in Spain's QKD-GEO quantum key distribution geostationary satellite mission. The university is part of the large industrial consortium led by Thales Alenia Space developing quantum communications technology for space-based quantum key distribution. University of Vigo brings expertise in telecommunications, photonics, and quantum optics to satellite QKD research and development. The university collaborates with Institute of Astrophysics of the Canary Islands, Polytechnic University of Madrid, Thales Alenia Space, and Hispasat advancing quantum-safe satellite communications infrastructure. University of Vigo conducts research in quantum communications, quantum cryptography protocols, and photonic quantum technologies for space applications. The university serves European quantum research community, quantum technology companies, and government agencies requiring quantum communications research, quantum optics expertise, and satellite QKD technology development. The university contributes to Spanish quantum technology ecosystem and European quantum communications infrastructure initiatives.
XT Quantech
XT Quantech is a Chinese quantum technology company developing quantum random number generators and quantum communication systems for security applications. The company provides QRNG devices and quantum key distribution solutions for government, military, and enterprise customers in China. XT Quantech is part of China's growing quantum security industry, supporting the national strategy to build quantum-safe communications infrastructure and protect sensitive information from quantum computer threats.
Related Categories
EuroQCI Initiative
The European Quantum Communication Infrastructure (EuroQCI) is building a secure quantum communication network spanning all 27 EU member states. This pan-European initiative will integrate quantum technologies into existing telecom infrastructure for government and critical infrastructure protection.
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