Rhonexum
- Company typePrivate
- Founded2025
- HeadquartersLausanne, Switzerland
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
Rhonexum firmographics
Firmographics- Name
- Rhonexum
- Legal name
- Rhonexum
- Website
- https://rhonexum.com
- Company type
- Private
- Founded year
- 2025
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Ownership category
- akta.pro rank
Rhonexum industry classification
Industry- Product category
- Cryogenic Electronics / Quantum Hardware
- SIC
- Industrial Instruments For Measurement, Display, And Control (3823)
- akta.pro primary industry
- Cryogenic Packaging, Enclosures & Thermal Interfaces (Sample Holders, PCBs, Connectors) (HDAGABAO)
- akta.pro secondary industries
- Microwave/RF Signal Generation, Up/Downconversion & LO Chains (HDAGABAG), Calibration, Characterization & Test Instrumentation (Cryo/RF) (HDAGABAM), Low-Noise & Cryogenic Amplification (HEMT/LNA) (HDAGABAI)
Keywords
Where Rhonexum is headquartered
LocationHeadquarters
- HQ city
- Lausanne
- HQ country
- Switzerland
- HQ region
- Europe
Offices1 record
Markets served
Rhonexum business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Operations, Infrastructure, Marketing or Sales
Revenue model
- Cryogenic Hardware Products: Sale of industrial-grade cryogenic electronics products including RX-IC (Cryogenic Integrated Circuit). Products designed for quantum computing applications targeting scalable quantum systems.
- RX-MODEL Simulation Software: SPICE-compatible compact model licensing for cryogenic circuit simulation, targeting designers developing chips for quantum computing and space exploration.
- RX-AMS Measurement Systems: Automated measurement system for cryogenic device testing, addressing operational costs for research pipelines.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
Rhonexum product offering
Product offeringCore offering
Rhonexum develops cryogenic electronics that operate at ultra-low temperatures near absolute zero (-270°C) using standard semiconductor processes. Its product portfolio includes RX-IC (Cryogenic Integrated Circuit for placement alongside quantum processors), RX-MODEL (SPICE-compatible compact model for cryogenic circuit simulation), and RX-AMS (Automated Measurement System for cryogenic device testing). The products target organizations building scalable quantum computing systems as well as chip designers developing circuits for quantum, space, and ultra-sensitive sensing applications.
Product overview
Rhonexum is a cryogenic electronics company developing three integrated products: RX-IC (Cryogenic Integrated Circuit) for active cryogenic chips, RX-MODEL (Cryogenic Circuit Simulation) for SPICE-compatible modeling, and RX-AMS (Automated Measurement System) for cryogenic device testing. Together, these products form a comprehensive cryogenic electronics portfolio addressing the scalability bottleneck in quantum computing, from simulation and design through to fabrication and testing.
Differentiator
Problem solved
Functional benefit
Brands
- RX-IC: Cryogenic Integrated Circuit - engineered for cryogenic integration to bring electronics closer to the quantum processor, improving signal integrity and scalability for large-scale quantum computing platforms.
- RX-MODEL
- RX-AMS
Products and services
- RX-IC (Cryogenic Integrated Circuit) Cryogenic Integrated Circuit engineered for integration closer to quantum processors within cryostats. Replaces bulky room-temperature control equipment with compact, scalable solutions. Built in three phases covering Power Management, Control, and Readout functions. Targets superconducting, spin, photonics, and trapped ion quantum computing systems, as well as space and sensing applications.
- RX-MODEL (Cryogenic Circuit Simulation) SPICE-compatible compact model built specifically for cryogenic circuit simulation. Uses a physics-based, semi-empirical approach with advanced normalization to deliver stable simulations across cryogenic regimes without convergence issues. Technology-agnostic across CMOS processes including GF 22nm FDSOI, ST 28nm FDSOI, and TSMC 28nm Bulk. Designed for chip designers developing circuits for quantum computing and space exploration.
- RX-AMS (Automated Measurement System) Automated measurement system for fast, accurate cryogenic device testing without manual probing or thermal cycling delays. Features automated alignment, high-reliability measurements, and seamless data capture for cryogenic environments. Replaces slow, error-prone manual probing processes and addresses operational costs in cryogenic research pipelines.
Quantifiable outcome
- 90% time and cost reduction in chip development through accurate cryogenic simulation (vs. traditional multiple physical iterations)
Companies that use Rhonexum
Customer profileSegments2 records
Ideal customer profiles2 records
Rhonexum technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Rhonexum partnerships and signals
Strategic signalPartnerships
Seven partnerships are on record, tiered core, minor and major.
- YQuantumcoreStrategic partnership between two Swiss deep-tech innovators to develop an integrated system-level architecture addressing hardware bottlenecks limiting quantum computer scalability. Combines Rhonexum's cryogenic electronics expertise with YQuantum's system integration and scalable hardware platforms.
- EPFLcoreRhonexum is a spin-out from EPFL's AQUA Lab. The company maintains close ties with EPFL including participation in EPFL Startup Launchpad, EPFL Alumni events, and events at EPFL Innovation Park.
- AQUA LabcoreParent laboratory at EPFL from which Rhonexum was spun out. Provides ongoing research collaboration and expertise in cryo-systems.
- QSEminorPartner organization listed on Rhonexum's website as part of their ecosystem/partners section.
- HEC ParisminorListed as partner on Rhonexum's website. Rhonexum participated in events hosted by HEC Paris such as Future of Computing in Paris.
- Creative Destruction LabmajorRhonexum completed the CDL Next Gen Computing 2025 program, benefiting from objective-based framework, high-level mentorship, and strategic focus refinement.
- Changemakers x Blaze Startup AcceleratorminorEPFL-based accelerator program where Rhonexum won SW Startup Spark Award and Public Vote Award in Spring 2025.
Scale indicators6 records
Recent moves6 records
Expansion highlights5 records
Rhonexum competitors and assessment
Company assessmentBroad incumbents
- Quantum Machines: Quantum Machines provides the OPX quantum control platform widely used in quantum labs. While its core is room-temperature control electronics, it overlaps with Rhonexum's customer base and is expanding toward cryogenic-integrated offerings.
- Bluefors: Bluefors is a leading manufacturer of cryogenic measurement systems and dilution refrigerators used in quantum computing labs. It is a broader incumbent in the cryogenic ecosystem that Rhonexum's products integrate with and serve.
- Zurich Instruments: Zurich Instruments manufactures high-precision quantum control and measurement instrumentation (SHF, HDAWG, etc.). It serves the same cryogenic-measurement use cases addressed by Rhonexum's RX-AMS, but from a room-temperature instrumentation angle.
- Quantinuum: Quantinuum is a leading trapped-ion quantum computing company and a potential large-scale customer for cryogenic control solutions. It is a broader incumbent in quantum hardware rather than a direct competitor to Rhonexum.
Emerging players
- Riverlane: Riverlane builds quantum error correction software and orchestration tools. It sits in the adjacent quantum control stack and is a potential ecosystem partner or integration target for Rhonexum's hardware offerings.
- IQM: IQM builds superconducting quantum computers and is a potential customer for Rhonexum's cryogenic control electronics. As a European quantum hardware builder, it is a directly addressable buyer in Rhonexum's home market.
- Q-CTRL: Q-CTRL provides quantum control software and infrastructure. It is thematically adjacent to Rhonexum's quantum control electronics business and represents a potential ecosystem partner for integrated hardware-software solutions.
Direct peers
- Delft Circuits: Delft Circuits produces cryogenic interconnects and wiring (Cri/oFlex) for quantum computing systems. It addresses the same interconnect/cabling bottleneck between qubits and control electronics that Rhonexum's RX-IC targets, making it a closely comparable peer.
- SeeQC: SeeQC develops cryogenic quantum control electronics and superconducting digital chips for quantum computing. It is the closest direct competitor to Rhonexum, with overlapping product focus on placing active control and readout electronics inside the cryostat.
- Qblox: Qblox builds scalable quantum control stacks (room-temperature and partially cryogenic) for qubit experiments. It competes in the same quantum control electronics category as Rhonexum, with a more established commercial position.
Market position
Strengths5 records
Weaknesses4 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
Rhonexum social profiles
Digital presenceRhonexum financial estimates
Financial estimateRevenue estimate
Valuation estimate
Rhonexum leadership team
Management profileNumber of profiles
Profiles6 records
Rhonexum funding detail
Funding detailFunding overview
Funding rounds3 records
Investors3 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Rhonexum 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 Rhonexum
What does Rhonexum do?
Rhonexum develops cryogenic electronics that operate at ultra-low temperatures near absolute zero (-270°C) using standard semiconductor processes. Its product portfolio includes RX-IC (Cryogenic Integrated Circuit for placement alongside quantum processors), RX-MODEL (SPICE-compatible compact model for cryogenic circuit simulation), and RX-AMS (Automated Measurement System for cryogenic device testing). The products target organizations building scalable quantum computing systems as well as chip designers developing circuits for quantum, space, and ultra-sensitive sensing applications.
Is Rhonexum a public or private company?
Rhonexum is a private company. It is classified as venture growth investor backed and is currently operating.
When was Rhonexum founded?
Rhonexum was founded in 2025. It employs 1 to 10 people.
Where is Rhonexum based?
Rhonexum is headquartered in Lausanne, Switzerland, in the Europe region.
How does Rhonexum make money?
Three revenue lines are on record. Cryogenic Hardware Products are the primary driver. The others are RX-MODEL Simulation Software and RX-AMS Measurement Systems.
Who are Rhonexum's main competitors?
Broad incumbents on record are Quantum Machines, Bluefors, Zurich Instruments and Quantinuum. Emerging players are Riverlane, IQM and Q-CTRL. Direct peers are Delft Circuits, SeeQC and Qblox.
Does Rhonexum have an API?
No public API is recorded for Rhonexum.
What industry is Rhonexum in?
Rhonexum's product category is Cryogenic Electronics / Quantum Hardware. Its primary akta.pro industry code is HDAGABAO, Cryogenic Packaging, Enclosures & Thermal Interfaces (Sample Holders, PCBs, Connectors), with a secondary code of HDAGABAG, Microwave/RF Signal Generation, Up/Downconversion & LO Chains. Its SIC code is 3823.