Question 1

What is QuantWare?

Accepted Answer

QuantWare is a superconducting quantum processor (QPU) manufacturer headquartered in Delft, Netherlands. Founded by CEO Matthijs Rijlaarsdam, QuantWare designs and fabricates high-coherence superconducting quantum processors that serve as the physical qubit layer in complete quantum computing systems. Their processors include the Soprano-class devices along with the A-Line and D-Line series, where the Contralto-A focuses on error correction and the Contralto-D is built for scalability. QuantWare sells QPUs to system integrators and research institutions rather than operating cloud access directly.

Question 2

What are the Contralto processors?

Accepted Answer

The Contralto processors are QuantWare's high-performance superconducting QPUs. The Contralto-A, part of the A-Line, is optimized for stability, high coherence, and error-correction research. The Contralto-D, part of the D-Line, is built for scalability and is the QPU deployed in Elevate Quantum's Q-PAC system in Colorado. Both are engineered for the demanding stability requirements of the Quantum Utility Block (QUB) architecture, targeting research and enterprise deployments that require reliable, high-fidelity operations over extended periods.

Question 3

What qubit counts does the Quantum Utility Block (QUB) come in?

Accepted Answer

The Quantum Utility Block is offered in three configurations: Small (5 qubits), suited for hardware research and university labs getting started with on-premises quantum hardware; Medium (17 qubits), designed for research labs and enterprises exploring practical quantum algorithms; and Large (41 qubits), intended for large government and enterprise projects requiring more computational headroom. All three sizes use a QuantWare superconducting QPU as their processor layer, with an upgrade path between configurations enabled by QuantWare's VIO 3D-integration technology.

Question 4

What is VIO scaling?

Accepted Answer

VIO stands for Vertical I/O, a 3D-integration technology developed by QuantWare that routes control signals through vertical interconnects rather than along the chip surface. This approach removes a key wiring bottleneck that limits how many qubits can be independently addressed on a single processor. VIO provides a scaling path from tens of qubits to hundreds and ultimately thousands, making it the technology that underpins QuantWare's roadmap for larger Quantum Utility Block configurations and future high-qubit-count systems.

Question 5

Can I run a QuantWare-powered QUB on Open Quantum?

Accepted Answer

Soon. Open Quantum is the cloud (QaaS) layer that puts Quantum Utility Block systems online for cloud access. Elevate Quantum's Q-PAC system, which uses a QuantWare Contralto-D QPU along with Qblox control electronics and Q-CTRL software, is coming soon to Open Quantum. You will submit quantum circuits to it using the Open Quantum SDK and unified API, the same way you access any other backend on the platform. New accounts include $50 of free quantum compute credits to start. Visit /signup to get started, or /create-job to run a circuit on an available backend today.

QuantWare Superconducting QPUs Power the QUB on Open Quantum

About QuantWare

A-Line and D-Line Processors

VIO 3D Integration

QuantWare in the Quantum Utility Block

QUB Configurations

Why It Matters on Open Quantum

Real Superconducting Hardware

Pre-Validated Stack

Cloud Access in Days

Unified API

Frequently Asked Questions

Getting Started

Explore Our Other Partners

qBitTensor Labs

Q-CTRL

Qblox

Maybell Quantum

Elevate Quantum

Size	Qubits	Target Use
Small	5 qubits	Hardware research, university labs
Medium	17 qubits	Research labs, enterprise teams
Large	41 qubits	Large government and enterprise projects