QphoX
QphoX builds quantum modem device, connecting quantum computers across a quantum network.
- Company typePrivate
- Founded2021
- HeadquartersDelft, Netherlands
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What QphoX does
QphoX builds quantum modem device, connecting quantum computers across a quantum network.
QphoX firmographics
Firmographics- Name
- QphoX
- Legal name
- QphoX B.V.
- Website
- https://www.qphox.eu/
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- QphoX builds quantum modem device, connecting quantum computers across a quantum network.
- Ownership category
- akta.pro rank
QphoX industry classification
Industry- Product category
- Quantum Computing Hardware
- NAICS
- Semiconductor and Related Device Manufacturing (334413), Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing (334220)
- SIC
- Computer Communications Equipment (3576), Semiconductors & Related Devices (3674), Radio & Tv Broadcasting & Communications Equipment (3663)
- akta.pro primary industry
- Quantum Transceivers, Modems & Photonic Interfaces (HDAGAFAE)
Keywords
Where QphoX is headquartered
LocationHeadquarters
- HQ city
- Delft
- HQ country
- Netherlands
- HQ region
- Europe
Offices1 record
Markets served
QphoX business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Operations, Supply Chain, Marketing or Sales, Infrastructure
Revenue model
- Quantum Transducer Sales: Sale of quantum transduction hardware enabling microwave-to-optical conversion for quantum computers. First commercially available quantum link interface between microwave and optical systems. Sold directly to quantum computing companies and research institutions.
- Optical Control System Sales: Sale of complete solutions for delivering RF signals to cryogenic environments. Targets quantum computing labs and facilities requiring scalable control systems.
- CryoSwitch Controller Sales: Sale of cryogenic switch control modules for microwave switch control in cryogenic environments. Reached milestone of 100 units shipped globally.
- Government/Research Contracts: Research and development contracts with government agencies such as AFRL ($5.8M contract) and participation in EU-funded projects (EIC, P4Q, Meet-Q).
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Custom enterprise pricing based on specifications and volume |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels5 records
QphoX product offering
Product offeringCore offering
QphoX designs and manufactures quantum transduction hardware that converts single microwave photons to single optical photons, enabling the networking of superconducting quantum computers over optical fiber. Its portfolio includes the Quantum Transducer, an Optical Control System for delivering RF signals into cryogenic environments, and a Cryogenic Microwave Switch Control Module compatible with Radiall cryogenic switches.
Product overview
QphoX offers a portfolio of three core hardware products focused on quantum transduction and cryogenic control technologies. The flagship Quantum Transducer provides the critical interface between microwave-based quantum processors and optical telecommunications infrastructure, enabling distributed quantum computing over long-distance optical networks. The QphoX Optical Control System delivers RF signals into cryogenic environments using optical fiber, reducing thermal load and enabling scalability of quantum processors. The Cryogenic Microwave Switch Control Module provides precision control for cryogenic switching applications. Together, these products address the fundamental challenge of connecting, controlling, and scaling quantum computing systems.
Differentiator
Problem solved
Functional benefit
Products and services
- QphoX Quantum Transducer The first commercially available quantum interface between single optical and single microwave photons, providing the missing link between microwave and telecom-based quantum systems. Enables large-scale networking of quantum computers by coherently converting quantum states between microwave and optical frequencies with ultra-low noise, high efficiency, and phase preservation at the single photon level. Sold to quantum computing companies and research institutions.
- QphoX Optical Control System A full solution for delivering RF signals to extreme cryogenic environments. Replaces coaxial cables and attenuators, severing the thermal connection between room temperature and cryogenic environments. Features ultra-low thermal conductivity optical fibers and end-to-end arbitrary RF pulse transmission while minimizing thermal load. For quantum computing labs and facilities requiring scalable control systems.
- Cryogenic Microwave Switch Control Module A control module designed and tested for use with Radiall's SP6T Cryogenic Latching Bipolar Actuator (models R583423141 and R573423600). Controls up to 4 separate SP6T switches from a single module via USB or Ethernet, with dedicated timing control logic, adjustable output voltage and pulse width, and inductive load protected outputs. Sold to quantum research labs and cryogenic system integrators.
Quantifiable outcome
- Enables connection of thousands of qubits to outside world using only tens of optical fibers due to extra bandwidth
- +3 more outcomes
Companies that use QphoX
Customer profileNamed customers4 records
Segments3 records
Ideal customer profiles2 records
QphoX technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration3 records
Feature3 records
QphoX partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered strategic and core.
- BlueforsstrategicCollaboration to mature optical control of superconducting qubits. Demonstrated out-of-the-box operation of QphoX Optical Control System with a transmon qubit at Bluefors Quantum Applications Lab in Helsinki. Validates compatibility of optical qubit control method with Bluefors cryogenic platform.
- IBMcoreIBM is the first company to integrate QphoX's Quantum Transducer with its Quantum Networking Unit (QNU) test devices. IBM will use the technology to connect superconducting qubits via optical networks, exploring distributed quantum computing architectures that could scale beyond current physical limits.
- Photonics for Quantum (P4Q) Consortiumstrategic€50M European pilot project to accelerate industrial adoption of quantum photonic technologies. 29 partners across 12 countries. QphoX participates as work package leader. Focus on reliable, scalable photonic chips for quantum applications.
- Superspin Project Partners (KIT, Aalto University, Palacký University)strategicEIC Pathfinder project linking superconducting quantum computer with spin-based quantum memory. QphoX collaborates with partners from Finland, Czech Republic, and Germany to demonstrate quantum frequency conversion technology.
- WelinqstrategicJoint initiative 'Meet-Q' to develop optical quantum interconnects for hybrid scalable quantum networking. Combines QphoX's quantum transduction technology with Welinq's quantum memory buffer (QDrive) to enable connections between quantum processors and quantum storage. Supported by Quantum Delta NL and BPI France.
- Sorbonne UniversitystrategicResearch partner in Meet-Q project combining QphoX's quantum transduction with Welinq's quantum memory technology. Sorbonne's foundational quantum memory research (20 years of research from Sorbonne and CNRS) enables quantum data center and long-distance communication applications.
- Rigetti Computingcore$5.8M three-year contract from AFRL to advance superconducting quantum networking. Combines Rigetti's superconducting microwave qubits with QphoX's single-photon microwave-optical transducers. Goal is to deliver systems providing entanglement between superconducting qubits and optical photons - the essential building block of quantum networking.
- National Quantum Computing Centre (NQCC)strategicMultinational collaboration for multi-channel optical readout of superconducting qubits. QphoX will scale its optical qubit readout system to interface with Rigetti's 9-qubit Novera QPU, enabling optical readout of all qubits. Combined system will be installed at NQCC facility in UK. Funded by RVO and Innovate UK via Eureka network.
- Quantum Data Centre Alliance (QDA)strategicFounding member of QDA alongside Cisco, Nu Quantum, NTT Data, OQC, Quantinuum, and QuEra. Forum to discuss opportunities and challenges in building large, scalable quantum computing services. Addresses distributed architectures, scaling, standardization, and interoperability.
- Welinq PartnershipstrategicPartnership to develop optical quantum interconnects for superconducting quantum computers. Combines QphoX's transduction technology with Welinq's quantum interconnection systems. Enables quantum processors to work together in clusters for larger, more powerful quantum systems.
Scale indicators5 records
Recent moves6 records
Expansion highlights6 records
QphoX competitors and assessment
Company assessmentDirect peers
- Welinq: French deep-tech startup developing quantum memory-based interconnects for hybrid quantum networks, complementary to QphoX's transduction technology. Already a joint partner in Project Meet-Q, addressing the same quantum networking opportunity.
- Nu Quantum: UK-based quantum networking startup building photonic interconnects and quantum networking infrastructure. A fellow founding member of the Quantum Data Centre Alliance and directly comparable as a quantum networking peer at similar stage.
- Quandela: French quantum photonics company producing single-photon sources and integrated photonic components for quantum computing and networking. Comparable as a European photonic-quantum hardware supplier pursuing similar end-markets.
- Quantum Machines: Israel-based provider of quantum control electronics and orchestration software (OPX, QUA) for quantum computing systems. Directly comparable in providing the hardware stack that addresses qubit control and signal delivery challenges at cryogenic temperatures.
- Zurich Instruments: Swiss manufacturer of advanced quantum control and measurement instrumentation (SHF, HDAWG platforms) widely adopted by superconducting quantum labs. Comparable as a control-electronics peer serving the same customer base.
- Qblox: Dutch quantum control systems company providing modular qubit control and readout hardware. A research collaborator of QphoX (co-author on Nature Physics optical readout paper) addressing adjacent parts of the same cryogenic quantum control stack.
Others
- Bluefors: Finland-based leading manufacturer of cryogenic measurement systems (cryostats, dilution refrigerators) used in quantum labs. Functions as both a partner (QphoX Optical Control integration at Bluefors Lab) and an adjacent/ecosystem player within the same customer workflows.
Broad incumbents
- IBM Quantum: Largest incumbent in superconducting quantum computing and QphoX's anchor customer/integration partner. Competes broadly in the same end-market and could selectively internalize transduction technology.
- Rigetti Computing: Public superconducting quantum computing company and QphoX's co-contractor on the $5.8M AFRL program. Comparable as a quantum system builder that integrates with QphoX's transduction products in its systems.
- Cisco: Global networking incumbent exploring quantum networking as part of QDA and emerging quantum infrastructure initiatives. Repositioning adjacent networking expertise to converge with the quantum networking opportunity QphoX targets.
Market position
Strengths5 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
QphoX social profiles
Digital presenceQphoX financial estimates
Financial estimateRevenue estimate
Valuation estimate
QphoX leadership team
Management profileNumber of profiles
Profiles5 records
QphoX funding detail
Funding detailFunding overview
Funding rounds3 records
Investors6 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
QphoX M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about QphoX
What does QphoX do?
QphoX designs and manufactures quantum transduction hardware that converts single microwave photons to single optical photons, enabling the networking of superconducting quantum computers over optical fiber. Its portfolio includes the Quantum Transducer, an Optical Control System for delivering RF signals into cryogenic environments, and a Cryogenic Microwave Switch Control Module compatible with Radiall cryogenic switches.
Is QphoX a public or private company?
QphoX is a private company. It is classified as venture growth investor backed and is currently operating.
When was QphoX founded?
QphoX was founded in 2021. It employs 11 to 50 people.
Where is QphoX based?
QphoX is headquartered in Delft, Netherlands, in the Europe region.
How does QphoX make money?
Four revenue lines are on record. Quantum Transducer Sales are the primary driver. The others are optical Control System Sales, cryoSwitch Controller Sales and government/Research Contracts.
Who are QphoX's main competitors?
Direct peers on record are Welinq, Nu Quantum, Quandela, Quantum Machines, Zurich Instruments and Qblox. Bluefors is listed as an others. Broad incumbents are IBM Quantum, Rigetti Computing and Cisco.
Does QphoX have an API?
No public API is recorded for QphoX.
What industry is QphoX in?
QphoX's product category is Quantum Computing Hardware. Its primary akta.pro industry code is HDAGAFAE, Quantum Transceivers, Modems & Photonic Interfaces. Its NAICS code is 334413 and its SIC code is 3576.