Delft Circuits — vendor dossier

Delft Circuits

Enabling supply chain
D

Delft Circuits manufactures cryogenic I/O cabling for quantum computers, specifically the Cri/oFlex® family of superconducting flex cables that carry microwave control and readout signals into dilution refrigerators. The cables use polyimide Kapton® substrates with silver or superconducting NbTi conductors and integrate attenuation and filtering directly into the flex assembly, replacing dense coaxial cable bundles at higher channel density and lower thermal load. Primary customers are quantum-computing hardware builders, dilution-refrigerator manufacturers, and cryogenic research laboratories. Founded in 2017 as a TU Delft spin-off by Daan Kuitenbrouwer and Sal Jua Bosman; the company has grown to 50+ staff and operates an in-house Quantum Fab cleanroom in Delft.

HQ
Delft, Netherlands
Founded
2017
Status
private
Last verified
Wed Jun 17 2026 08:00:00 GMT+0800 (Singapore Standard Time)

Timeline

20172018201920202021202220232024202520262027202820292030today
2017
Delft Circuits B.V. incorporated as TU Delft spin-off; Cri/oFlex® beta testing underway
2023-09
€6.3M Series A closed: DTXL (€5M lead), High-Tech Gründerfonds, QuVest participating; funds production scale-up and team growth
2025-09
Bluefors partnership announced: Cri/oFlex® integrated as standard I/O in Bluefors XLDsl dilution refrigerators (up to 1,536 lines per system); joint validation paper submitted
2025-09
5-year I/O roadmap published: 256 channels/loader today → 1,024 by 2027 → 4,096 by 2029; targets 40,000+ qubit systems
2025-12
Martin Danoesastro appointed CEO; €8M Series A extension closes, raising total Series A to €15M; new investors Paeonia Group and Waves Capital Partners join
2026-04
Karen Keenan appointed COO; Maarten Hendriks moves to lead Quantum Fab expansion
2026
Series B fundraise; further Quantum Fab capacity expansion in Delft
2027
1,024 channels per loader (Cri/oFlex® next generation)
2029
4,096 channels per loader; target system scale 40,000+ qubits; 32× density advantage over coaxial baseline
shipped milestone public roadmap

Current flagship

Cri/oFlex® (256-channel-per-loader generation) — Superconducting NbTi flex cable with integrated filtering and attenuation; 8 channels per flex, 0.3 mm thickness

Milestones

  1. 2026-04
    Karen Keenan appointed COO; Maarten Hendriks moves to lead Quantum Fab expansion
    Enabling supply chain press source ↗
  2. 2025-12
    Martin Danoesastro appointed CEO; €8M Series A extension closes, raising total Series A to €15M; new investors Paeonia Group and Waves Capital Partners join
    Enabling supply chain press source ↗
  3. 2025-09
    Bluefors partnership announced: Cri/oFlex® integrated as standard I/O in Bluefors XLDsl dilution refrigerators (up to 1,536 lines per system); joint validation paper submitted
    Enabling supply chain press source ↗
  4. 2025-09
    5-year I/O roadmap published: 256 channels/loader today → 1,024 by 2027 → 4,096 by 2029; targets 40,000+ qubit systems
    Enabling supply chain press source ↗
  5. 2023-09
    €6.3M Series A closed: DTXL (€5M lead), High-Tech Gründerfonds, QuVest participating; funds production scale-up and team growth
    Enabling supply chain press source ↗
  6. 2017
    Delft Circuits B.V. incorporated as TU Delft spin-off; Cri/oFlex® beta testing underway
    Enabling supply chain press source ↗

Roadmap

  • 2026 Series B fundraise; further Quantum Fab capacity expansion in Delft source ↗
  • 2027 1,024 channels per loader (Cri/oFlex® next generation) source ↗
  • 2029 4,096 channels per loader; target system scale 40,000+ qubits; 32× density advantage over coaxial baseline source ↗

Capability details

4 unverified fields
  • founded — Activities started 2016; B.V. incorporated 2017 — sources differ; 2017 used as formal founding year
  • key_personnel.2.since
  • shareholders — All stake percentages undisclosed — private company; rows reflect publicly announced lead/participant roles only
  • modalities.enabling.products — Bluefors joint validation paper submitted but not yet published in peer-reviewed venue as of last_verified

People

  • Martin Danoesastro — CEO (since 2025-12) ↗
  • Karen Keenan — COO (since 2026-04) ↗
  • Robby Ferdinandus — CCO ↗
  • Daan Kuitenbrouwer — Co-Founder (since 2017) ↗
  • Sal Jua Bosman — Co-Founder (since 2017) ↗

References