When you don’t have real hardware, these FOSS simulators scale from laptops to supercomputers.

License: BSD-3-Clause Intermediate representation standard.

: Perhaps the most popular framework, Qiskit is an open-source SDK for working with quantum computers at the level of pulses, circuits, and algorithms. Its 2.x era (released in 2025) focuses on performance and scalability for utility-scale workloads.

This guide explores the leading open-source frameworks, simulators, and cloud-access plans that are democratizing quantum technology in 2026. Leading Open-Source Quantum Frameworks