SDT
Category: AI Infrastructure
A leading full-stack quantum infrastructure company specializing in Quantum Design and Manufacturing (QDM) to bridge the gap between laboratory research and industrial-scale quantum applications. SDT was founded in 2017. The company is led by Jiwon Yune. Based in Seoul, South Korea. Team size: 70-150. Total funding raised: ~$35M. Latest round: Series B. Key investors include Praxis Capital Partners, NH Investment & Securities, Shinhan Venture Investment, DS Asset Management, GS, KB Investment, AG Investment, K2 Investment, IBK Investment & Securities.
- Founded
- 2017
- Headquarters
- Seoul, South Korea
- Team size
- 70-150
- Total funding
- ~$35M
Value proposition
Provides the world's first hardware-agnostic, commercial-grade quantum-classical hybrid infrastructure, enabling organizations to deploy quantum computing and secure communication without building proprietary hardware from scratch.
Products and solutions
Kreo SC/NA: Superconducting and Neutral Atom full-stack quantum computers (incl. commercial 20-qubit Kreo SC)., QuREKA: Hybrid quantum cloud (CPU/GPU/QPU) with NVIDIA CUDA-Q; commercial launch at Quantum Korea 2026., QubeStack: Full-stack QCaaS platform; TTA GS Grade 1 certification (2026)., CryoRack: Korea-manufactured cryogenic cooling (10 mK-class; 4K systems shown 2026)., AquaRack: Single-phase immersion cooling for AI/HPC and hybrid quantum-classical racks., QCU (Quantum Control Unit): High-precision / high-density qubit control electronics., Quantum Security: QKD and QRNG., Quantum Sensing: DAS/DTS for industrial monitoring.
Unique value
SDT is the first Korean company to commercialize a full-stack quantum-classical hybrid system, offering a 'modular' approach where customers can swap QPU (Quantum Processing Unit) types while maintaining the same control infrastructure.
Target customer
National research institutes (KISTI, KRISS), academic institutions (KAIST), global technology enterprises (LG Electronics), and quantum-focused startups (QAI).
Industries served
Quantum Computing, Cybersecurity & Defense, Artificial Intelligence Infrastructure, Industrial Digital Transformation (DX), Scientific Research & Academia
Technology advantage
Hardware-agnostic control technology compatible with multiple qubit modalities (superconducting, neutral atom, ion trap); deep integration with NVIDIA's CUDA-Q allows seamless switching between classical GPU and quantum QPU workloads.
How they differentiate
SDT distinguishes itself through its 'Quantum Design and Manufacturing' (QDM) model. Unlike companies focused solely on proprietary qubit modalities, SDT provides a full-stack, hardware-agnostic infrastructure. This includes precision control electronics (QCU), dilution refrigerators (CryoRack), and the QuREKA cloud platform, which allow customers to integrate and swap different types of QPUs (superconducting, neutral atom, etc.) within a standardized modular framework.
Main competitors
ID Quantique (IDQ), EYL, Rigetti Computing, IonQ
Key partnerships
NVIDIA: CUDA-Q on QuREKA; first Korean company in NVQLink; Kreo integrated with DGX B200 at Quantum-AI Hybrid Data Center., Open Quantum Design (OQD): Member and official manufacturing partner for open-source trapped-ion quantum hardware (Aug 2026)., Anyon Technologies: Superconducting QPU collaboration (Kreo) and cryogenic IP., QuEra Computing: QuEra Quantum Alliance for neutral-atom deployment (Nov 2025)., IonQ: KISTI–Megazone consortium for hybrid quantum cloud with IonQ Tempo; manufacturing discussions., KRISS & KISTI: National 1,000-qubit Yb neutral-atom QPU flagship and quantum cloud projects., LG Electronics: Joint quantum computing hardware / neutral-atom R&D.
Notable customers
KISTI (Korea Institute of Science and Technology Information), KRISS (Korea Research Institute of Standards and Science), LG Electronics, KAIST, QAI
Major milestones
Joined Open Quantum Design (OQD) as official manufacturing partner for open-source ion-trap quantum hardware (Aug 2026), Opened Korea's first commercial Quantum-AI Hybrid Data Center in Gangnam with 20-qubit Kreo + NVIDIA DGX B200 / NVQLink (Feb 2026), Became first Korean company in NVIDIA NVQLink quantum ecosystem (2026), Secured ₩30B (~$20.6M) Series B led by Praxis Capital Partners with NH Investment & Securities (Jan 2026), Joined QuEra Quantum Alliance for neutral-atom quantum computing (Nov 2025), Closed ₩20B Pre-IPO funding (Aug–Dec 2024), Selected for Korea national 1,000-qubit ytterbium neutral-atom QPU flagship with KRISS (Dec 2025)
Growth metrics
Cumulative funding ~$35M through Jan 2026 Series B (₩30B) led by Praxis Capital after 2024 Pre-IPO rounds; PitchBook/CB Insights show IPO registration/rumored listing while company remains private as of Aug 2026.
Market positioning
Global full-stack quantum infrastructure and manufacturing leader
Geographic focus
South Korea, North America, and Asia-Pacific
Patents and IP
Holds extensive intellectual property (IP) in quantum signal processing, FPGA-based edge computing, and quantum-safe communication; recently integrated key cryogenic IP through a strategic partnership with Anyon Technologies.
About Jiwon Yune
Founder and CEO of SDT. Previously a researcher at the Korea Institute of Science and Technology (KIST) Quantum Information Research Group. He holds degrees in Physics and Electrical Engineering from MIT and conducted research at the MIT-Harvard Center for Ultracold Atoms focusing on diamond-based quantum computing.
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Official website: https://sdt.inc/