Quantum hardware reimagined

We don’t just build quantum hardware. We redefine the materials and architecture behind it, using carbon for what silicon can’t deliver.

Unique at Scale

Our unique difference: we don’t face the same scalability issues as the other approaches because we have better quality qubits and a better way to connect them.
The “Paris Project”
We’re on a mission to drive one of the biggest technological breakthroughs of the century and change the course of history.
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Illustration of a quantum computer with colorful layered circular components and glowing connections.Modern black quantum computer with yellow vertical lights and a central cylindrical module labeled C12.

A monumental change in computing

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Quantum computing is one of this century’s most transformative technologies. It opens new frontiers in materials design, drug discovery, industrial optimization, and more.
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We’re working with forward-looking leaders across industries to explore how their business can gain an advantage from quantum computing. 
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Chemicals
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Aerospace &
Defense
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Energy
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Finance

Quantum artisans

We’re a unique team of experts from all over the world, brought together by our vision to build the next frontier of quantum computing and be part of an extraordinary moment in history. 
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SEE OUR OPEN POSITIONS
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Three people sitting on colorful modern couches in a brightly lit room with turquoise walls and circular blue wall decorations, using laptops.
Two women working on laptops at a table in a bright, modern space labeled Feyniman Forest.
Scientist inspecting a complex quantum computing device with gold and transparent components in a lab.
Two men sitting at computers in an office, one smiling and looking at the other.
Low-angle view of the Pantheon in Paris with a French flag flying above its Corinthian columns and dome under a cloudy sky.
Person wearing blue gloves assembling or inspecting a small electronic chip on a metal platform with tweezers under a microscope light.
Modern office lounge with a white sofa, blue armchair, large yellow-orange hanging lamp, and textured turquoise wall labeled C12.

Recent news

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C12 & Classiq partner to accelerate access to spin-qubit quantum computing
27 january 2026
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Why Carbon May Be the Future of Quantum Computing
7 april 2025
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Reflections from Paris: Scaling of Spin Qubits 2025
28 may 2025
READ MORE
Unique at scale
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