# Cirq

Google Quantum AI's open-source Python framework for writing and running NISQ-era circuits.

Cirq is Google Quantum AI's open-source Python library for writing, manipulating and optimizing quantum circuits and running them on simulators or quantum hardware. It is the native SDK for Google's Quantum Computing Service and remains the reference framework for superconducting-circuit research code.

Price: Free, open source (Apache 2.0). Site: https://github.com/quantumlib/Cirq.

Also on the [web page](https://quantumcompanies.fyi/apps/cirq).