QCOS — the operating system for quantum computers

QCOS is the SoftQuantus operating system for quantum computers. It is the execution and control layer for quantum, hybrid and HPC workloads: you submit a circuit, QCOS decides where it runs, what it costs, and what evidence comes back.

What the quantum OS gives you

Capability	What it means in practice
Hardware abstraction layer	One API over simulators, GPU simulation and QPU providers such as IBM Quantum, AWS Braket, Azure Quantum and IonQ
Backend catalog	`GET /api/v1/runtime/backends` lists every backend and whether its credentials make it available
Cost control	Estimate credits before submission, and gate real-QPU execution behind explicit cost confirmation
Evidence	Jobs can return signed evidence bundles for audit and reproducibility
Four interfaces	REST API, Python SDK, CLI, and an MCP server for LLM agents

Where to start

Quantum OS user manual

The complete end-user manual — install it, run your first quantum program, add hardware.

QCOS quick start

Run your first quantum circuit on the built-in simulator in a few minutes.

Connect a quantum computer

The four ways to attach a QPU: cloud provider, bring-your-own credentials, on-premise, or a vendor driver.

Add a GPU

Run quantum simulations on a GPU with the auto-selecting simulation engine.

Quantum computing use cases built on QCOS

QAOA portfolio optimisation, Grover DNA sequence alignment, Shor RSA vulnerability assessment and VQE molecular ground-state energy all run through the same runtime. See the quantum computing use cases for worked examples.

QuantumLock — licensing, entitlement validation and quantum-safe cryptography for QCOS deployments.
SynapseX — the SoftQuantus AI platform that runs on top of the quantum stack.

QuantumLock — licensing and quantum-safe cryptography for the quantum OS

​What the quantum OS gives you

​Where to start