About
SEEQC is a US-UK quantum computing company building energy-efficient superconducting quantum computers. It uses Single Flux Quantum (SFQ) digital logic for on-chip control, which eliminates the large cable bundles that limit conventional superconducting systems by bringing classical electronics into the cryostat. Founded in 2019, SEEQC targets data-center deployments with 64 or more qubits and systems that scale without cable bottlenecks. It is based in Elmsford, New York and London, UK, and also operates a major R&D and operations centre in Naples, Italy, where it demonstrated System Red, Italy's first complete SEEQC quantum computer. SEEQC has raised more than $125M, with backing from Merck, Samsung, and Leonardo, including a $30M Series A extension in January 2025. In January 2026, the company announced a merger agreement with Allegro Merger Corp at a $1B valuation. SEEQC is a confirmed DARPA QBI participant, working with IBM to integrate its SFQ chip-based control layer with IBM's quantum systems for scalable fault-tolerant computing. In March 2026, SEEQC published a Nature Electronics paper demonstrating the first quantum computer with integrated on-chip SFQ qubit control, a 5-qubit processor that uses digital multiplexing to eliminate dedicated control lines per qubit, the first quantum computer with fully integrated on-chip qubit control at millikelvin temperatures. The Naples lab achieved two-qubit gate speeds of 39ns and average fidelities of 98.4%. In October 2025, SEEQC enabled real-time quantum-GPU connectivity via NVIDIA NVQLink. Earlier in 2025 it deployed its Cross-Qubit Scaling Platform at the UK NQCC in March and expanded partnerships to ITRI Taiwan in December 2025 and National Taiwan University in January 2026. The Innovate UK-funded QuPharma project, worth £6.8M, engages SEEQC alongside Merck KGaA and BASF to apply quantum simulation to pharmaceutical and industrial chemistry targets. Update 2026-06-17: SEEQC will participate in a four-year re
Quantum Specifications
| Qubit Technology | Superconducting |
| Physical Qubits | 64 |
| 2Q Gate Fidelity | 98.4% |
| Error Correction | Digital-sfq |
| Quantum Focus | hardware |
Funding History
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Application Areas
Research Partners
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Related News
$300mm Wafers to Host SEEQC’s Next-Generation Qubit Materials
SEEQC Secures Role in CHIPS Act-Funded NORDTECH Quantum Scaling Project
SEEQC Awarded Participation in U.S. CHIPS Act–Backed Microelectronics Commons NORDTECH Quantum R&D Program
SEEQC Reports Integrated Qubit Control Logic Operating at Millikelvin Temperatures
SEEQC Demonstrates First Quantum Computer with Integrated On-Chip Qubit Control
