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Market position

SDT positions itself as a full-stack Korean quantum supplier spanning design, manufacturing, system integration and cloud, with qubit-technology-agnostic design capability. It operated what it describes as Korea's first commercial quantum computing facility, a Quantum-AI Hybrid Data Center in Gangnam, Seoul, and was named a World Economic Forum Technology Pioneer in the advanced computing and quantum category in 2026. Korean press coverage grouped its January 2026 raise among the country's largest deep-tech deals of the month.

The company emphasizes end-to-end in-house design and manufacturing across control electronics, cryogenics and machining, delivery times and costs it describes as more favorable than imported cryogenic equipment, customization and technical support, an ISO-certified quantum manufacturing factory, modality-agnostic design covering superconducting, neutral-atom and ion-trap systems, and the combination of hardware with a hybrid CPU/GPU/QPU cloud platform.

Technology

SDT's stack covers precision control and measurement electronics (qubit controllers up to 8.5 GHz bandwidth, picosecond-resolution time tagging, multi-channel coincidence counting, multi-channel pulse generation), cryogenic and vacuum systems including dilution refrigerators and CryoRack, precision machining and miniaturization/system integration for QPU packaging, and operating software. On the computing side, the KREO series integrates partner QPUs with SDT control and cryogenic infrastructure, and the QuREKA platform unifies CPU, GPU and QPU resources for hybrid workloads. Related technologies include 1:N quantum key distribution, QRNG cameras, quantum-dot sensor cameras, and AquaRack single-phase immersion cooling in which servers, GPUs and NPUs are submerged in dielectric fluid. SDT's high-resolution photon time measurement technology was designated a Korean National Strategic Technology.

Go-to-market

SDT markets through its own product catalogue and website, exhibitions and conferences (Quantum Korea 2026, the Quantum Information Society of Korea annual meeting, INTERBATTERY 2026, Q2B Silicon Valley, a national science museum exhibition), technical booth talks with academic and industry speakers, LinkedIn publishing, and alliance and MOU relationships with global vendors and universities. It also runs QuREKA Academy educational offerings and is hiring an education business development lead.

Universities and public research institutes (for example KISTI, KRISS, KAIST, Seoul National University, Korea University, Sungkyunkwan University), national quantum programs and government agencies in Korea and abroad, quantum hardware companies needing control, cryogenic or machining capacity, AI/HPC data center operators, and local governments buying AI services in Japan.

Geography

Headquarters and the Quantum-AI Hybrid Data Center are in Gangnam-gu, Seoul; a machining/CNC role is posted in Bupyeong-gu, Incheon. SDT operates a Japanese subsidiary (SDT K.K.) and runs Japanese-language operations, with public-sector AI work in Beppu City and Namerikawa City. International activity includes a superconducting quantum computer project with MIMOS Berhad in Malaysia, participation in Q2B Silicon Valley and GTC 2026, and partnerships with companies including NVIDIA, IonQ, AWS, QuEra, QuantWare, Anyon Technologies and Delft Circuits.

History

Company chronologies describe a shift from IoT and embedded hardware toward quantum technology. After the 2017 founding and Arm-related IoT work, SDT was selected for the TIPS program in 2019 and established its Japanese entity in 2020. In 2021 it developed and launched the CCU quantum measurement instrument and changed its corporate name. In 2022 it won a Korea Institute of Science and Technology Information (KISTI) project to prototype a quantum computing cloud web service and framework, was selected for a Ministry of Science and ICT/National Police Agency project on quantum-security IP cameras, and commercialized a quantum-encrypted IP camera and QRNG technology. From 2023 it began exporting quantum ultra-precision measurement and control equipment, delivered the QuREKA quantum cloud to KISTI, and received a Minister of Science and ICT commendation and a Prime Minister's commendation. In 2024 it licensed atom-based entangled photon source technology from Prof. Han-seb Moon's group at Pusan National University, signed a joint research contract with Prof. Do-hun Kim's group at Seoul National University on a semiconductor quantum computer measurement software platform, agreed on generative-AI pilot work with Beppu City and Oita University in Japan, signed a neutral-atom ecosystem MoU with KRISS, Korea University and LG Electronics, and obtained ISO 9001 certification for quantum computer manufacturing. In 2025 it was selected for a KISTI national platform program, launched the MIMOS Berhad project in Malaysia and joined the QuEra Quantum Alliance; in 2026 it opened Korea's first commercial quantum-AI data center, joined the NVIDIA NVQLink ecosystem and demonstrated QCU integration at GTC 2026.

Risks & controversies

Financial statements show persistent and widening losses (2025 operating loss of KRW 10.15 billion and net loss of KRW 24.31 billion against KRW 3.64 billion of revenue), with total liabilities of KRW 86.8 billion versus KRW 15.8 billion of assets and negative total equity at end-2025. Industry-position metrics rank the company low on profitability within its sector. In July 2026 SDT published a statement saying its logo, business materials and technical documentation had been used without authorization on another company's website and promotional materials. The Korean Wikipedia article on the company carries notices flagging possible conflict-of-interest editing and neutrality concerns.