PARIS and TEL AVIV, Israel, January 27, 2026 -- C12, a European deep-tech company building the next generation of spin qubit quantum processors, and Classiq, the leading software platform for enterprise-grade quantum computing development, today announced a strategic integration partnership. This collaboration bridges the gap between scalable quantum hardware and scalable quantum software, accelerating enterprise and research access to quantum computing.

C12’s quantum processors are based on ultra-pure carbon nanotubes, a nearly one-dimensional material that achieves record coherence and low noise. This cleaner-materials approach enables scalable architectures by combining high qubit quality with robust connectivity, ensuring performance scales with system size.

Classiq provides a quantum software platform that combines high-level modeling with a synthesis engine, which lets developers design and optimize quantum circuits that scale efficiently as hardware systems evolve. With this integration, the Classiq platform now provides access to leading superconducting, ion-trap, neutral atom, cat and spin qubit QPU modalities, as well as industry-leading simulators from NVIDIA and Intel.

Together, the companies are making it easier to build, test, future-proof, scale and execute quantum applications.

Pairing Scalable Hardware with Scalable Software

As part of the integration, Classiq now supports Callisto, C12’s digital twin of its in-development hardware. The Callisto Discovery edition models real physical parameters and noise from the carbon-nanotube architecture, supporting up to 13 noisy qubits and includes features like mid-circuit measurement, noisy initialization and realistic noise from charge-noise, phonon noise and qubit relaxation. Developers can now use Classiq’s Qmod language and synthesis engine to design, compile and test quantum algorithms on Callisto, aligning today’s R&D with tomorrow’s hardware capabilities.

“At C12, we believe quantum computing must move beyond theory and become a practical accelerator for the most demanding computational challenges,” said Pierre Desjardins, C12’s CEO. “By working with Classiq, we empower developers today to harness tomorrow’s hardware, bridging the divide between breakthrough quantum hardware technology and usable quantum software.”

“Partnering with C12 to integrate an architecture that is dedicated to the highest quality qubits brings exciting new options to quantum developers. Our joint solution creates a scalable framework from C12’s Callisto digital twin to their future quantum devices,” said Nir Minerbi, CEO and co-founder of Classiq. “Hardware diversity is increasing rapidly, and ensuring developers have access is more important than ever.”

Availability

The integration is now available to select Classiq and C12 customers. Joint demonstrations and technical sessions will be featured at upcoming industry events.