
Technology
A stack with one job per layer.
Between a person’s script and a quantum computer, SoftQuantus keeps execution, trust, compute and billing apart, so each can be checked and each can change on its own.
The stack
Five layers, top to bottom.
- 01
Your work
Scripts, notebooks, schedulers, agents
Decides what to run and why.
- 02
Quantum operating layer
Prepares the work, controls the scientific execution and seals the record. It is not a computer.
- 03
Keys, licences and signatures, and the evidence that stays with each result.
- 04
Compute
Softquantus Cloud
Being built as the one service through which simulators, GPUs and quantum computers are reached.
- 05
Machines
Simulators and quantum computers
Do the work. CPU state-vector simulation today; hardware when it is switched on.
Why it is built this way
Three bottlenecks.
- 01
Fragmented machines
Each computer has its own interfaces and limits. One operating layer keeps the job description stable while the machine underneath changes.
- 02
Unaccountable results
A number without its circuit, backend and seed cannot be reviewed. Every run through QCOS can carry a sealed record of those facts.
- 03
Scattered credentials and bills
Provider accounts belong in one compute service and billing in one commercial platform, instead of spreading through every tool and team.
What it does today
Capabilities you can use and inspect.
One interface
REST API, Python SDK, CLI and MCP server over the same operations.
Simulation
CPU state-vector simulation up to 24 qubits through that interface.
Evidence
A record per run, sealed under a SHA-256 Merkle root.
Error correction
Stabilizer algebra, a code library and a BP+OSD decoder, exercised on the simulator.
Post-quantum signing
ML-DSA-65 signing through liboqs, not CAVP-validated, in QuantumLock.
Conformance
A published test specification for hardware vendors, ACOS-ISA v1.0.

Execution
Three parties, three responsibilities.
A job crosses three services, and none of them does another’s work.
- The Platform charges
- Licences, credits and invoices for every product, in one place.
- QCOS controls the science
- Checks that the work may run, and prepares and tracks it.
- Cloud controls the hardware
- Runs the compute and reports what was used.