# PsiQuantum

**Canonical:** https://apis.io/providers/psiquantum/  
**Website:** https://www.psiquantum.com  
**APIs profiled:** 0

PsiQuantum is a Palo Alto, California photonic quantum computing company founded in 2016 by Jeremy O'Brien, Terry Rudolph, Pete Shadbolt, and Mark Thompson, building utility-scale, fault-tolerant quantum computers based on single-photon qubits at telecom wavelength. Its Omega chipset — a silicon photonic system integrating on-chip single-photon sources, superconducting nanowire single-photon detectors, barium-titanate optical switches, and low-loss fiber couplers — is manufactured on 300mm wafers at GlobalFoundries' flagship fab in Malta, NY, leveraging mature semiconductor processes rather than exotic cryogenic fabrication. The company is constructing two utility- scale, million-qubit, fault-tolerant quantum computing sites: one at Moreton Bay, Queensland, Australia (in partnership with the Australian and Queensland governments) and one at the Illinois Quantum and Microelectronics Park in Chicago, Illinois (with additional R&D at PsiLabs in Daresbury, UK and assembly at PsiFactory in Milpitas, CA). PsiQuantum exposes a developer surface aimed at fault-tolerant quantum algorithm researchers: Construct, an enterprise platform for FTQC algorithm development, resource analysis, and training; Circuit Designer, a free web tool for prototyping and visualizing fault-tolerant quantum circuits; Circuit Hub, a shared library of `.circuit` files; and two open-source Python projects on GitHub — Bartiq, a symbolic quantum resource estimator that compiles subroutine-level costs to global T-gate, Toffoli, qubit, and circuit-volume estimates, and QREF, an open JSON-Schema-based format for representing quantum algorithms as hierarchical DAGs with a Pydantic validation library and a `qref-render` visualization tool. NVIDIA's CUDA-Q is integrated into Construct for accelerated simulation. PsiQuantum does not currently publish a commercial cloud-access REST API, OpenAPI specification, or a general-purpose quantum-execution SDK comparable to those of gate-model quantum cloud providers — its public developer artifacts are confined to FTQC resource-estimation tooling and algorithm-design surfaces — and there is no public pricing or self-serve tier for the underlying quantum hardware.

## Kin Score — 5.7 / 100 (minimal)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 5.7).

| Facet | Score |
|---|---|
| Discoverability | 50.0 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 5.3 |
| Developer Ergonomics | 0.0 |
| Commercial Clarity | 0.0 |
| Access Clarity | 0.0 |

## Agent readiness — 0.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | no |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## Security (1)

- **Psiquantum Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Quantum Computing, Photonic Quantum Computing, Fault-Tolerant Quantum Computing, FTQC, Single Photon Qubits, Silicon Photonics, Quantum Resource Estimation, Quantum Algorithms, Quantum Software, Omega Chipset, Construct, Circuit Designer, Bartiq, QREF, Semiconductors, Hardware

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/psiquantum/). Scores are computed from the provider's own public artifacts under a published rubric.