South Korea Quantum Computing Companies 2026: Complete Vendor Guide

The leading south korea quantum computing companies in 2026 sit inside an ecosystem driven by a national strategy, by some of the world’s largest technology corporations, and by a wave of specialist startups. South Korea passed a dedicated Quantum Science and Technology Act, created a prime-minister-chaired Quantum Strategy Committee, and is hosting major quantum hardware from IBM and IonQ. Fourteen organisations define the south korea quantum computing companies in this guide: SDT (Seoul, superconducting and photonic hardware), Norma (Seoul, quantum middleware), Korea Quantum Computing (Busan, IBM quantum services), Qunova Computing (Daejeon, quantum chemistry software), EYL (Seoul, quantum randomness), SK Telecom (Seoul, quantum-safe communication), Samsung SDS (Seoul, post-quantum cryptography), KT Corporation (quantum networking), KRISS (Daejeon, national quantum research), and KISTI (Daejeon, national quantum-HPC host).

Why South Korea is scaling up in quantum South Korea built its technology economy on semiconductors, displays, telecommunications, and consumer electronics, and it is now applying that same industrial model to quantum. The country was a relatively late mover in quantum computing compared with the United States, China, and parts of Europe, but it has moved quickly in the 2020s, treating quantum as a strategic national technology rather than a research curiosity. The south korea quantum computing companies span hardware, software, security, and national infrastructure. What makes the Korean approach distinctive is the weight of large corporations. SK Telecom, the Samsung group, and KT all have serious quantum programmes, mostly in quantum-secure communication and post-quantum cryptography, and they bring deployment scale that pure startups cannot match. Alongside them, a layer of specialist companies, SDT in hardware, Norma in middleware, Qunova in chemistry software, EYL in randomness, has emerged, giving the south korea quantum computing companies both corporate heft and startup agility.

The Quantum Strategy and national funding South Korea has put a formal legal and budgetary framework behind quantum technology.

The National Assembly passed a Quantum Science and Technology Act in 2024, creating the legal basis for national quantum policy, and a Quantum Strategy Committee chaired by the prime minister held its first meeting in 2025 to coordinate the effort across ministries. The 2025 national quantum budget rose sharply to around 198 billion won, roughly 136 million United States dollars, a substantial increase on the previous year. The longer-term ambition is larger still, with government plans pointing toward total quantum investment of more than three trillion won, on the order of two billion United States dollars, by 2035, and stated targets including a thousand-qubit quantum computer and advances in quantum sensing and communication.

The Korea Research Institute of Standards and Science and the Korea Institute of Science and Technology Information are central public-sector players. This framework is the reason the south korea quantum computing companies have grown quickly into a coordinated national sector. The top south korea quantum computing companies Ten organisations define the south korea quantum computing companies covered in this guide. One builds quantum-computing hardware (SDT), one provides middleware and hardware access (Norma), one resells commercial quantum services (Korea Quantum Computing), and one builds quantum-chemistry software (Qunova). Three are focused on quantum security and communication (EYL on randomness, plus the telecom operators SK Telecom and KT), one is a corporate post-quantum-cryptography arm (Samsung SDS), and two are national research institutes (KRISS and KISTI). The Ministry of Science and ICT coordinates national policy behind the south korea quantum computing companies ecosystem. Independent directories of the south korea quantum computing companies list a similar shortlist of names. The profiles below cover the leading organisations in depth. SDT Inc. Superconducting + photonic hardware · Seoul, South Korea · Founded 2018 SDT is the Seoul-based hardware vendor founded in 2018, and it is one of the few of the south korea quantum computing companies developing quantum processors rather than only software or security products. The company works on both superconducting and photonic quantum hardware, and it operates a 20-qubit superconducting system known as Kreo. In March 2026 SDT opened what it describes as Korea’s first commercial quantum-artificial-intelligence hybrid data centre in Seoul, connecting its quantum system to NVIDIA accelerated computing through the NVQLink interface, an architecture that ties quantum execution tightly to classical AI hardware. SDT raised a pre-IPO round of around 20 billion won in late 2024 led by Shinhan Venture Investment, taking cumulative funding into the tens of millions of dollars. SDT is the clearest domestic hardware bet among the South Korean quantum companies. sdt.inc → Norma Inc. Quantum middleware + security · Seoul, South Korea · Founded 2011 Norma is the Seoul-based company founded in 2011 that began in cybersecurity and has built a substantial quantum business around its Q Platform, a middleware layer that connects users to multiple quantum-hardware backends. Rather than building its own processor, Norma positions itself as the access and orchestration layer for the South Korean quantum companies, and in 2025 it signed agreements that broadened the hardware its platform can reach, including a deal to offer Rigetti superconducting systems and partnerships with the trapped-ion vendor QUDORA and the control-and-cryogenics companies IQM and Maybell Quantum. Norma has also moved into applications, launching an aerospace quantum project with a Korean university and reporting an international contract to supply a quantum computer abroad. The company is the leading quantum-software-and-access vendor among the South Korean quantum companies. norma.co.kr → Korea Quantum Computing (KQC) Commercial quantum services · Busan, South Korea · IBM Quantum hub Korea Quantum Computing, or KQC, is the Busan-based company that became an IBM Quantum Innovation Center in 2022 and positions itself as the first commercial quantum-computing solution provider in Korea. KQC resells access to IBM quantum hardware and the IBM watsonx artificial-intelligence platform, giving Korean enterprises a route to cloud quantum computing without building their own infrastructure. The most significant part of its roadmap is a plan, announced with IBM, to deploy an IBM Quantum System Two physically in Busan by 2028, which would give Korea a major on-site quantum computer outside the capital region. KQC connects the South Korean quantum companies to one of the largest quantum-hardware programmes in the world, and it anchors quantum activity in the south-eastern port city of Busan. kqchub.com → Qunova Computing Quantum chemistry software · Daejeon, South Korea · Quantum software Qunova Computing is the Daejeon-based quantum-software vendor focused on quantum chemistry, the application area where useful quantum advantage is widely expected to arrive first. The company’s flagship algorithm, HI-VQE, short for Handover Iteration Quantum Eigensolver, is designed to compute the properties of molecules on current quantum hardware more efficiently than standard variational methods, which matters for drug discovery and materials research. In August 2025 Qunova closed a Series A of around 10 million United States dollars, with investors including GS Ventures, the Korea Development Bank, and several Korean venture funds. Based in Daejeon, the research city that hosts many of Korea’s national laboratories, Qunova is the leading quantum-chemistry-software specialist among the South Korean quantum companies and a clear example of the country’s strength in the algorithm-and-application layer. qunova.com → EYL Quantum random number generators · Seoul, South Korea · Founded 2015 EYL is the Seoul-based hardware vendor founded in 2015, and it builds quantum random number generators, the devices that produce genuinely unpredictable numbers needed to create strong cryptographic keys. EYL’s distinctive approach derives randomness from the radioactive decay of a tiny radioisotope source, a quantum process that is fundamentally unpredictable, and the company has commercialised this as a compact chip. Random number quality is a foundational security problem, because predictable or biased keys weaken even the strongest cipher, and a hardware quantum source removes that weakness at the root. EYL’s quantum random number generator technology has been recognised under Korea’s framework for national strategic technologies, and the company sits in the quantum-security layer of the South Korean quantum companies alongside the larger telecom efforts. eylpartners.com → SK Telecom Quantum-safe communication · Seoul, South Korea · Telecom operator SK Telecom is South Korea’s largest mobile operator and one of the most active corporate players among the South Korean quantum companies, with a long-running quantum-communication and quantum-security programme. The company has built quantum-key-distribution links into parts of Korea’s network backbone, and in 2025 it launched a hybrid quantum-cryptography product that combines QKD with post-quantum-cryptography algorithms standardised by the United States National Institute of Standards and Technology, pairing physics-based and mathematics-based protection in one system. SK Telecom has also been a major investor in quantum communication internationally, and it agreed to exchange its stake in the Swiss QKD company ID Quantique for a holding in the trapped-ion computing company IonQ. SK Telecom gives the South Korean quantum companies deep telecom-scale deployment experience. sktelecom.com → Samsung SDS Post-quantum cryptography · Seoul, South Korea · IT services arm Samsung SDS is the information-technology and digital-services arm of the Samsung group, and it represents the post-quantum-security side of the South Korean quantum companies. The company has developed cryptographic technology designed to resist attack by future quantum computers, work that connects to a Korean national effort to standardise post-quantum-cryptography algorithms. The wider Samsung group has also brought quantum-derived security to consumers, equipping certain Galaxy smartphones with quantum random number generation developed with SK Telecom. Post-quantum cryptography is the practical near-term response to the quantum threat, because it can be deployed on existing hardware and networks today, ahead of any large quantum computer. As part of one of the world’s largest technology groups, Samsung SDS gives the South Korean quantum companies enormous reach into enterprise and consumer security. samsungsds.com → KT Corporation Quantum networking + QKD · Seongnam, South Korea · Telecom operator KT Corporation is one of South Korea’s major telecommunications operators, and like SK Telecom it has made quantum communication a significant part of its technology strategy. KT has worked on quantum-key-distribution and post-quantum-cryptography pilots across Korea’s network infrastructure, building the secure-communication capability that a national telecom backbone will need as quantum computers mature. The company has also supported quantum research and ecosystem development through partnerships with Korean universities and research institutes. Telecom operators matter to the South Korean quantum companies because they own the fibre networks on which quantum-secure communication must run, and they provide both demand and deployment scale. KT, alongside SK Telecom, gives Korea two large carriers actively building quantum-communication infrastructure into the national network. kt.com → KRISS (Korea Research Institute of Standards and Science) National quantum research · Daejeon, South Korea · Metrology institute KRISS, the Korea Research Institute of Standards and Science, is the country’s national metrology institute in Daejeon, and it is one of the central research bodies behind the South Korean quantum companies. National metrology institutes are natural quantum-research leaders because measurement at the highest precision already depends on quantum physics, and KRISS runs programmes spanning quantum computing, quantum sensing, and quantum standards. The institute has been working toward a domestically built superconducting quantum system of around fifty qubits, a significant step for Korea’s national hardware capability. KRISS also trains researchers and supports the broader ecosystem, functioning much as a national laboratory does for a country’s technology base, and it gives the South Korean quantum companies a public-sector research anchor in the Daejeon science cluster. kriss.re.kr → KISTI (Korea Institute of Science and Technology Information) National quantum-HPC host · Daejeon, South Korea · Supercomputing institute KISTI, the Korea Institute of Science and Technology Information, is the national supercomputing institute in Daejeon, and it is becoming the host of Korea’s first on-site hybrid quantum-HPC platform. KISTI operates the country’s flagship national supercomputers, and it agreed with the United States company IonQ to deploy a 100-qubit trapped-ion quantum system, called Tempo, integrated alongside the KISTI-6 supercomputer. Co-locating a quantum processor with a major supercomputer matters because near-term quantum algorithms run as a tight loop between quantum execution and classical post-processing, and a national centre that provides that environment lowers the barrier for the whole research community. KISTI gives the South Korean quantum companies and Korean researchers a shared quantum-HPC platform, complementing the IBM hardware coming to Busan and the System One at Yonsei University. kisti.re.kr → Samsung Electronics Tech conglomerate / investor · Suwon · KRX: 005930 Samsung Electronics, the world’s largest memory-chip maker, pursues quantum computing through the Samsung Advanced Institute of Technology and has backed the field through its Catalyst Fund, an early investor in IonQ. As Korea’s flagship technology company it brings semiconductor-scale manufacturing to the national quantum effort. samsung.com → SK Hynix Semiconductor / quantum R&D · Icheon · KRX: 000660 SK Hynix, the memory-semiconductor giant, runs quantum research and has invested in domestic quantum start-ups, positioning its fabrication expertise behind Korea’s quantum-hardware ambitions. Its chip-making scale is a strategic asset for the country’s roadmap. skhynix.com → LG Electronics Electronics conglomerate · Seoul · KRX: 066570 LG Electronics joined the IBM Quantum Network and explores quantum computing for materials, batteries and artificial intelligence through its research arm. It is one of several Korean conglomerates steadily building quantum capability. lg.com → ETRI National research institute · Daejeon · founded 1976 The Electronics and Telecommunications Research Institute is South Korea’s national ICT laboratory and a hub of the country’s superconducting-qubit and quantum-networking research. It anchors the public side of the ecosystem alongside the universities. etri.re.kr → Quantum Intelligence Corp Seoul, South Korea · Founded 2020 Quantum Intelligence Corp (QIC) integrates quantum computing with artificial intelligence to support drug discovery. Its QUEST platform uses algorithms that analyze how electronic charges are distributed in molecules to predict drug behavior, effectiveness, and safety, relying on an artificial neural network prediction model that adopts the 3D distribution of electrostatic potentials (ESPs) derived from quantum mechanics. In August 2024, QIC partnered with QuEra Computing to use quantum computers to improve QUEST platform performance. The company also collaborates with Oxford Quantum Circuits in the UK, Quandela in France, and Classiq in Israel, and runs a joint venture with 48Hour Discovery in Canada. Beyond healthcare, QIC explores quantum computing for finance, including algorithmic trading, risk analysis, and asset management. www.qic.ai → Korean Post Quantum Cryptography Post-quantum · Seoul, South Korea · Founded 2021 The Korean Post-Quantum Cryptography (KpqC) competition is South Korea’s national PQC standardisation initiative, launched in 2021 by the National Intelligence Service (NIS) with the National Security Research Institute and modelled on the NIST PQC process. The first round opened in November 2022 with 7 KEM and 9 digital-signature candidates, and the second round in December 2023 advanced four of each. In January 2025 the KpqC secretariat announced the final winners: NTRU+ and SMAUG-T as Key Encapsulation Mechanisms, and AIMer and HAETAE as digital signature algorithms. KpqC outputs feed the Telecommunications Technology Association (TTA) Korean cryptographic standards stack and inform PQC adoption by Korean telcos, semiconductor firms, and government systems. kpqc.or.kr → ORIENTOM Quantum software · Seoul, South Korea · Founded 2020 ORIENTOM is a South Korean startup founded in 2020 by Alfred Bang, also known as Seung-hyun Bang, who serves as CEO and as Chairman of the Korea Quantum Industry Association (KQIA). The company develops application software that makes quantum computing accessible for financial services. ORIENTOM collaborates with Yonsei University on joint research applying quantum computing to financial problems, with Yonsei students working as ORIENTOM interns and presenting papers on the potential and limitations of quantum financial algorithms. The company develops and integrates financial algorithms covering portfolio optimization, risk assessment, derivative pricing, and financial market modeling into financial platforms. In October 2025, ORIENTOM announced plans to build a middleware platform of complete quantum finance algorithms by a target of 2030, and is working on a national project on derivative product valuation with Kookmin Bank and Yonsei University. ORIENTOM collaborates with NVIDIA and expanded into Southeast Asia in 2025, serving Korean and Asian financial institutions that need quantum-enhanced computation. www.orientom.com → ICTK Post-quantum · Seoul, South Korea · Founded 2017 ICTK is a South Korean security semiconductor company specializing in hardware-rooted security and post-quantum cryptography chip design. The company formed a $15M strategic partnership with BTQ Technologies to co-develop the Quantum Compute in Memory (QCIM) security chip, targeting 1 million digital signatures per second and 5x AES processing speed for infrastructure-grade security. ICTK’s PQC chip expertise complements BTQ’s post-quantum algorithms to deliver quantum-safe hardware security for critical infrastructure, financial systems, and IoT deployments. ictk.com → KIST Superconducting · Seoul, South Korea · Founded 1966 The Korea Institute of Science and Technology (KIST) is South Korea’s oldest and most comprehensive government-funded research institute, founded in 1966 in Seoul. It conducts quantum computing and quantum sensing research as part of South Korea’s national quantum strategy, with programmes in superconducting qubits, quantum photonics, and quantum materials. KIST’s quantum research includes superconducting qubit processors, quantum dot-based single-photon sources for quantum communication, and nitrogen-vacancy (NV) centre diamond sensors for quantum magnetic imaging. Its quantum sensing group develops compact quantum magnetometers for biomedical imaging such as magnetoencephalography and for materials characterisation. KIST collaborates with KAIST, KRISS, and Korean quantum companies on the national quantum hardware roadmap. KIST participates in South Korea’s government-funded Quantum-Leap Flagship projects and maintains bilateral quantum research programmes with Germany through the Fraunhofer-KIST cooperation, as well as with Japan and the United States. Its quantum photonics group is developing quantum random number generators and quantum key distribution hardware for deployment in South Korean financial and government security infrastructure. www.kist.re.kr/en → Keypair Post-quantum · Seoul, South Korea · Founded 2020 Keypair is a South Korean full-stack post-quantum cryptography security company developing quantum-safe hardware-rooted security for critical infrastructure. BTQ Technologies made a strategic investment in Keypair to jointly develop and co-own post-quantum cryptography intellectual property for next-generation infrastructure security systems. Keypair deployed quantum-safe security for KEPCO’s (Korea Electric Power Corporation) Advanced Metering Infrastructure (AMI), becoming the first commercial deployment of PQC in South Korean energy infrastructure. Based in Seoul, South Korea. keypair.kr → AMCG Co., Ltd. Superconducting · Seoul, South Korea · Founded 2021 AMCG develops MCG Scan, a medical system that measures bio-magnetic signals generated by the heart using superconducting quantum interference devices (SQUID). The next-generation quantum sensor technology provides high-precision cardiac diagnostics through non-invasive magnetocardiography. Exhibited at CES 2025 showcasing quantum sensor applications in medical imaging and cardiac health monitoring. amcg.co.kr → Korea Quantum Computing Hub Daejeon, South Korea · Founded 2022 Korea Quantum Computing Hub is a Daejeon-based quantum research hub backed by over 30 national research institutes including KAIST, KRISS, and ETRI, central to Korea’s quantum valley initiative. The consortium coordinates quantum research across Korea’s leading institutions. KQC Hub serves as the focal point for Korea’s national quantum computing program, coordinating research, sharing resources, and developing the quantum workforce to establish Korea as a competitive quantum technology nation. kqchub.com → Gene On Biotech Seoul, South Korea · Founded 2019 Gene On Biotech develops QUAI, an AI-quantum drug discovery platform powered by proteome-scale experimental data. Using a 20,000-human-protein microarray, QUAI accelerates peptide therapeutic design through quantum-enhanced computational methods. The platform combines quantum computing with artificial intelligence for pharmaceutical research and drug development. Exhibited at CES 2025. geneonbiotech.com → QSIMPLUS Quantum software · Seoul, South Korea · Founded 2021 QSIMPLUS offers QSIMPro, a quantum communication software simulator for prototyping quantum cryptography systems without physical hardware. The Korean company provides simulation tools for quantum network and QKD system design. QSIMPLUS enables researchers and companies to develop and test quantum communication protocols in software before building physical systems, accelerating quantum communications technology development and reducing development costs. qsimplus.com → What the lineup reveals The first pattern is the central role of quantum-secure communication. SK Telecom, KT, EYL, and Samsung SDS all work primarily on quantum key distribution, quantum random number generation, or post-quantum cryptography, rather than on building quantum computers. This reflects both Korea’s telecom strength and a national focus on protecting networks against the future quantum threat, and it makes quantum security the most commercially mature segment of the South Korean quantum companies. Big corporations set the pace The second pattern is the weight of large technology groups. In most national ecosystems, startups lead and corporations follow, but in Korea the Samsung group, SK Telecom, and KT are among the most active quantum players. Their involvement brings deployment scale, capital, and consumer reach, as the appearance of quantum random number generation in mass-market smartphones shows, and it gives the South Korean quantum companies a distinctive corporate-led character. Hardware leans on partnerships The third pattern is that Korea is acquiring large-scale quantum hardware through international partnerships rather than building it all domestically. IBM hardware is coming to Busan through Korea Quantum Computing, an IBM Quantum System One already runs at Yonsei University, and IonQ is delivering a trapped-ion system to KISTI. Domestic hardware, led by SDT and national efforts at KRISS, is at an earlier stage, so the South Korean quantum companies currently combine home-grown software and security with imported processors. The Seoul, Daejeon, and Busan map The South Korean quantum companies cluster around three centres. Seoul, the capital, is the largest, home to SDT, Norma, and EYL, and to the headquarters of the major corporations, SK Telecom, the Samsung group, and KT, that run quantum programmes. The concentration of corporate research, venture capital, and talent makes the Seoul metropolitan area the commercial heart of Korean quantum technology. Daejeon, about 150 kilometres south of Seoul, is the country’s science city and the research heart of the ecosystem. It hosts the national institutes KRISS and KISTI, the Korea Advanced Institute of Science and Technology, and the quantum-chemistry-software company Qunova, making it the centre of public-sector quantum research and the national-laboratory effort. Busan, the major port city in the south-east, is emerging as a third centre through Korea Quantum Computing and the planned IBM Quantum System Two deployment. Together these three cities give the South Korean quantum companies a clear national geography. Foreign quantum hardware in Korea A defining feature of the Korean ecosystem is the scale of foreign quantum hardware being installed in the country. In 2025 an IBM Quantum System One, built around a 127-qubit processor, became operational at Yonsei University’s campus in the Songdo district of Incheon, making South Korea one of only a handful of countries to host an IBM System One. The deployment gave Korean researchers and companies direct access to a major commercial quantum computer on home soil. Two further installations are planned or under way.

Korea Quantum Computing and IBM intend to deploy an IBM Quantum System Two in Busan by 2028, which would be a substantially more powerful machine, and the United States company IonQ agreed to deliver a 100-qubit trapped-ion system, Tempo, integrated with the KISTI-6 supercomputer as Korea’s first on-site hybrid quantum-HPC platform. These partnerships mean the South Korean quantum companies can develop and benchmark on world-class hardware while domestic processor efforts continue to mature.

When South Korea matters for your quantum strategy Quantum-safe communication and security If your priority is quantum-safe communication, South Korea is one of the most advanced countries to study. SK Telecom and KT have built quantum-key-distribution into national network infrastructure, SK Telecom offers a hybrid product combining QKD with post-quantum cryptography, EYL builds quantum random number generators, and Samsung SDS develops post-quantum-cryptography technology. Enterprises in telecom, finance, and government planning for the quantum threat will find deployed, operating systems among the South Korean quantum companies. Commercial quantum hardware access For access to quantum hardware, Korea offers several routes.

Korea Quantum Computing resells IBM quantum and artificial-intelligence services, an IBM System One runs at Yonsei University, and IonQ hardware is coming to KISTI. Norma provides middleware that reaches multiple hardware backends. Organisations that want to run workloads on commercial quantum computers in the Asia-Pacific region should treat the South Korean quantum companies as a serious access point. Quantum software and chemistry For quantum software, the Korean ecosystem has a clear strength in chemistry. Qunova Computing builds algorithms designed to compute molecular properties efficiently on current quantum hardware, which is directly relevant to drug discovery and materials research, and Norma offers tools for developing and running quantum applications. A quantum-software or quantum-chemistry strategy with an Asia-Pacific dimension should account for the South Korean quantum companies and the research base at Daejeon. Read next Australia quantum companies Israel quantum companies Germany quantum companies Top quantum hardware companies Top quantum software companies Frequently asked questions Who are the leading South Korean quantum companies in 2026? The Korean ecosystem combines specialist companies and large corporations. SDT in Seoul builds superconducting and photonic quantum hardware, Norma in Seoul provides quantum middleware, Korea Quantum Computing in Busan resells IBM quantum services, and Qunova Computing in Daejeon builds quantum-chemistry software. On quantum security, EYL builds quantum random number generators, the telecom operators SK Telecom and KT build quantum-secure networks, and Samsung SDS develops post-quantum cryptography. The national research institutes KRISS and KISTI anchor public-sector quantum research and the national quantum-HPC effort. Together these ten organisations define the South Korean quantum companies covered in this guide, an ecosystem unusually shaped by large technology corporations. What is South Korea’s national quantum strategy? South Korea has built a formal framework for quantum technology.

The National Assembly passed a Quantum Science and Technology Act in 2024, creating the legal basis for national quantum policy, and a Quantum Strategy Committee chaired by the prime minister held its first meeting in 2025 to coordinate the effort across government. The 2025 national quantum budget rose to around 198 billion won, roughly 136 million United States dollars, and government plans point toward total quantum investment above three trillion won, on the order of two billion dollars, by 2035. Stated targets include a thousand-qubit quantum computer. This framework is why the South Korean quantum companies have grown quickly into a coordinated national sector.

Does South Korea have a quantum computer? Yes, several. In 2025 an IBM Quantum System One, built around a 127-qubit processor, became operational at Yonsei University in the Songdo district of Incheon, making South Korea one of only a handful of countries to host an IBM System One.

Korea Quantum Computing and IBM plan to deploy a more powerful IBM Quantum System Two in Busan by 2028, and the United States company IonQ is delivering a 100-qubit trapped-ion system to the KISTI supercomputing institute. On the domestic side, the South Korean quantum companies include SDT, which operates a 20-qubit superconducting system, and the national institute KRISS has been working toward a home-built superconducting machine of around fifty qubits. What is South Korea strongest in for quantum technology?

The South Korean quantum companies are strongest in quantum-secure communication and post-quantum security. SK Telecom and KT have built quantum-key-distribution into national network infrastructure, SK Telecom offers a hybrid product combining QKD with post-quantum cryptography, EYL builds quantum random number generators, and Samsung SDS develops post-quantum-cryptography technology. This strength reflects Korea’s deep telecom and electronics industry and a national priority on protecting networks against future quantum attacks. Korea also has a clear capability in quantum-chemistry software through Qunova Computing. Domestic quantum-computing hardware, led by SDT and national efforts at KRISS, is at an earlier stage, so Korea currently pairs strong home-grown security and software with imported processors. Why are big Korean corporations involved in quantum? South Korea’s quantum ecosystem is unusually shaped by large technology groups, and the reason is the structure of the Korean economy. Companies such as SK Telecom, the Samsung group, and KT have the capital, the engineering depth, and the network infrastructure to pursue quantum technology at scale, and they see quantum-secure communication as a natural extension of their telecom and electronics businesses. Their involvement gives the South Korean quantum companies deployment scale that pure startups cannot match, including quantum random number generation built into mass-market smartphones and quantum-key-distribution links across national networks. This corporate-led character is a distinctive feature of the Korean ecosystem compared with startup-led ecosystems elsewhere. Where are South Korea’s quantum companies located?

The South Korean quantum companies cluster around three cities. Seoul, the capital, is the largest centre, home to SDT, Norma, and EYL, and to the headquarters of the major corporations with quantum programmes, SK Telecom, the Samsung group, and KT. Daejeon, the national science city about 150 kilometres south of Seoul, is the research heart, hosting the national institutes KRISS and KISTI, the Korea Advanced Institute of Science and Technology, and the quantum-chemistry-software company Qunova. Busan, the major south-eastern port city, is emerging as a third centre through Korea Quantum Computing and the planned IBM Quantum System Two deployment. These three cities give the South Korean quantum companies a clear national geography. What foreign quantum hardware is installed in South Korea? South Korea hosts a significant amount of foreign quantum hardware. An IBM Quantum System One, built around a 127-qubit processor, became operational at Yonsei University in Incheon in 2025, making Korea one of only a few countries with an IBM System One.

Korea Quantum Computing and IBM plan to deploy a more powerful IBM Quantum System Two in Busan by 2028.

The United States company IonQ agreed to deliver a 100-qubit trapped-ion system, called Tempo, integrated with the KISTI-6 supercomputer as Korea’s first on-site hybrid quantum-HPC platform. These partnerships let the South Korean quantum companies develop and benchmark on world-class commercial hardware while domestic processor efforts continue to mature. How does South Korea compare with other quantum nations? South Korea was a later mover than the United States, China, and parts of Europe, but it has scaled up quickly. Its national quantum budget and the planned multi-trillion-won long-term investment place it among the more committed nations, though still below the largest spenders. Korea’s distinctive strengths are quantum-secure communication, post-quantum cryptography, and the involvement of major corporations such as SK Telecom and Samsung, which give the South Korean quantum companies unusual deployment scale. On hardware, Korea relies significantly on partnerships with IBM and IonQ while domestic efforts mature. Overall it is a fast-rising, corporate-led quantum nation with particular depth in the security and communication layers. Stay current. See today’s quantum computing news on Quantum Zeitgeist for the latest breakthroughs in qubits, hardware, algorithms, and industry deals. Tags: