SEEQC is a digital infrastructure supplier that designs and manufactures superconducting digital control, readout, and quantum-classical integration chips for quantum computers. SEEQC does not build complete quantum systems but instead provides the digital components that sit between a quantum processor and classical computing environments. The company uses superconducting Single Flux Quantum digital circuits that operate at cryogenic temperatures. By placing control and readout electronics physically adjacent to qubits, SEEQC aims to reduce the wiring density, thermal load, and system complexity that limit the scaling of quantum hardware. The company's product portfolio includes digital qubit readout, flux control, charge control, and quantum-classical interfaces. SEEQC operates an in-house superconducting wafer fabrication foundry in New York, providing fabrication services to external customers as its only fully commercialized product line. SEEQC generates revenue from engineering services, integration programs, and government contracts with hardware developers and agencies. The company's strategy focuses on integrating these functional blocks into a unified chip architecture and expanding manufacturing capacity through international partnerships. SEEQC's long-term success depends on the industry transition from specialized services toward standardized hardware sales as quantum systems scale toward fault-tolerance.