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§ Private Profile · Delft, Netherlands
Designs and manufactures scalable cryogenic I/O systems and superconducting cabling for quantum computing, internet, and astronomy.
Delft Circuits is a hardware manufacturer based in Delft, Netherlands, that designs, tests, and produces scalable cryogenic input/output systems and superconducting cabling for quantum computing applications. The company addresses critical hardware bottlenecks in advanced quantum technologies by manufacturing flexible, high-density wiring that operates effectively at near-absolute zero temperatures. Operating with a dedicated workforce of 21 to 50 employees, the enterprise has raised €15 million in total equity financing and grants, which includes a recent €8 million funding extension. Its specialized cryogenic hardware products are currently utilized by major technology corporations and national research institutions, including recognizable customers like Google, Intel, Microsoft, and NASA. The firm also maintains strategic commercial partnerships with industry peers such as Bluefors to develop and deliver fully integrated quantum solutions. Delft Circuits was officially founded in 2017 by co-founders Sal Bosman and Daan Kuitenbrouwer.
Delft Circuits has raised $16.3M across 2 funding rounds.
Delft Circuits has raised $16.3M in total across 2 funding rounds.
Delft Circuits has raised $16.3M across 2 funding rounds. Most recently, it raised $9.3M Series A Extension in December 2025.
| Date | Round | Lead Investors | Other Investors | Status |
|---|---|---|---|---|
| Dec 3, 2025 | $9.3M Series A Plus | — | DeepTechXL, High Tech Grunderfonds, Paeonia Ventures, Quvest, Wave Capital | Announced |
| Sep 1, 2023 | $7M Series A | DeepTechXL | High Tech Grunderfonds | Announced |
Delft Circuits has raised $16.3M in total across 2 funding rounds.
Delft Circuits's investors include DeepTechXL, High-Tech Grunderfonds, Paeonia Ventures, QuVest, Wave Capital.
Delft Circuits is a Dutch hardware company specializing in high-density input/output (I/O) solutions, particularly cryogenic cabling, for the quantum industry. It develops, manufactures, and sells the Cri/oFlex® platform—a scalable system of flexible, superconducting cables that replace bulky coaxial cables, enabling higher channel densities (>1000 signals), lower thermal loads, and better microwave performance at cryogenic temperatures.[1][2][3] Serving quantum computing labs, national labs, startups, corporations, and academia worldwide, it solves critical wiring bottlenecks that limit qubit scaling by reducing heat conduction, space usage, and integration complexity while boosting reliability.[4][6][7] With over eight years of track record, a team of 40+, in-house cleanroom facilities, and recent Series A funding from DeepTech XL (backed by ASML and Philips), the company shows strong growth, including new product launches like a turnkey HD I/O system in 2025 and an I/O roadmap for thousands of qubits.[4][5][7][8]
Delft Circuits emerged from the QuTech quantum cluster in Delft, Netherlands, as one of its first scale-ups, with its first prototype developed in January 2017.[1][4] Co-founder Daan Kuitenbrouwer, now CCO, led the initial effort targeting multichannel cabling for large-scale quantum setups, but a pivotal moment came at the APS March Meeting (the world's largest physics conference), where feedback shifted focus to simpler, single-channel (30 cm) cryogenic microwave cables as a market entry point.[1] This pivot enabled first sales in early 2019, rapid team growth to over 40 multidisciplinary experts (spanning semiconductors, cryogenics, RF, quantum physics, and more), and in-house facilities expansion to 1000 m² cleanroom production by 2024, with a second fabline commissioned that year.[2][4][5] Early traction with hundreds of I/O modules sold to nearly 100 global customers solidified its path from proof-of-concept to industrial supplier.[5]
Delft Circuits rides the quantum computing scaling wave, addressing I/O wiring as a key bottleneck as systems push beyond hundreds of qubits toward utility-scale with thousands—where coaxial cables fail on density, heat, and reliability.[1][6][7][8] Timing aligns with surging market demand for fault-tolerant quantum tech, fueled by investments from ASML/Philips and QuTech ecosystem ties.[4] Favorable forces include qubit fidelity needs, cryostat constraints, and full-stack integration pressures, positioning Cri/oFlex® as a first-mover enabler for global players.[6] It influences the ecosystem by accelerating R&D (e.g., via easier setups for algorithms over hardware tweaks) and setting standards for cryogenic I/O, with its 2025 roadmap directly supporting industry goals for massive qubit counts.[7][8]
Delft Circuits is primed to dominate quantum I/O as the go-to scalable supplier, with expansions like a new 750 m² cleanroom (expandable) and HD I/O systems driving revenue from rising qubit demands.[6][7] Trends like modular quantum utilities and superconductor integration will amplify its edge, potentially evolving it into a broader cryogenic hardware platform amid $B-scale quantum investments. Its QuTech roots and blue-chip backers suggest sustained leadership, paving faster paths to commercial quantum tech—turning yesterday's prototypes into tomorrow's reality, just as its cabling unlocks qubit frontiers.[4][8]