quantum-sdk

Quantum4J brings quantum programming to Java with a full Quantum Software Engineering stack — circuits, simulators, compiler passes, QASM support, and enterprise-grade extensibility.

AbirQu multi-language quantum SDK - AbirQu is built to deliver high-performance hybrid quantum-classical execution (CPU/GPU/cloud quantum backends), with ongoing benchmark validation against established SDKs.

QENS provides a layered API for researchers, educators, and engineers working with quantum error correction. It ships with built-in support for surface codes, repetition codes, and color codes, multiple decoder implementations, and publication-quality visualization -- all with only numpy and matplotlib as dependencies.

A modular quantum computing library in Python featuring QAOA, Grover, HHL, and VQC — built on Qiskit, with future plans to become a QPU-agnostic, from-scratch quantum SDK.

QuEra Computing — independent third-party profile of a public API surface, by API Evangelist. QuEra Computing is a Boston-area neutral-atom quantum computing company, founded in 2021 by scientists from Harvard and MIT. Its flagship system, Aquila, is a 256-qubit field-programmable analog neutral-atom quantum processor that has been publicly availab

QONTOS quantum SDK for the hybrid superconducting-photonic modular architecture: circuits, cross-module transpilation to Bell pairs + feed-forward, link noise, and a QEC-aware logical layer.