Quantum computing promises to revolutionise industries from medicine to energy, but the road to scalable systems remains blocked by an overseeed obstacle, which is wiring. French deeptech startup Isentroniq is tackling this hidden challenge head-on, developing next-generation wiring that eliminates the heat, cost, and space bottlenecks limiting quantum computers today.
The challenge behind quantum dreams
Quantum computers rely on qubits, which are tiny quantum bits that must be cooled near absolute zero to remain stable. But controlling them requires thousands of ultra-thin wires running through cryogenic chambers called dilution refrigerators. Each wire introduces heat, takes up space, and adds cost.
This creates a structural deadlock. Current systems can manage only a few hundred qubits before reaching their physical limits. Scaling to millions of qubits, the threshold necessaryed for practical, fault-tolerant quantum computing, would demand massive facilities and investments worth billions. The sheer complexity and energy costs build this approach unsustainable.
Isentroniq’s innovation directly confronts this wiring crisis, promising a way to integrate 1,000 times more qubits within existing cryostats. By reducing heat transfer, physical bulk, and cabling costs, the company’s breakthrough could cut the price of a million-qubit machine from tens of billions to about €50 million, a transformative leap toward commercially viable quantum computing.
Funding to accelerate scalable quantum hardware
To power its mission, Isentroniq has raised €7.5 million in fresh funding led by Heartcore, with participation from OVNI Capital, Kima Ventures, iXcore, Better Angle, Epsilon VC, and support from Bpifrance and the French National Research Agency (ANR) under the France 2030 initiative.
This capital will assist the Paris-based company expand its engineering team, advance its proprietary wiring technology, and forge industrial partnerships to deliver a plug-and-play infrastructure solution for quantum computer builders. Adopting a fabless model, Isentroniq designs the architecture while relying on specialised global partners for production. This approach ensures industrial-grade quality and accelerates deployment without the burden of heavy capital expconcludeiture.
What specific market problem do you address?
As per the company, “Every superconducting quantum computer today faces a hard physical limit: each control line that connects a qubit to the outside world introduces heat and takes space. At the temperatures required for quantum operations, about 0.01°C above absolute zero (-273.14°C), even tiny amounts of heat are catastrophic. As a result, existing cryogenic systems can only handle hundreds of qubits per cryostat, and scaling to one million qubits – the size necessaryed for commercially applyful quantum computers – with today’s infrastructure would require facilities the size of ten football stadiums and cost tens of billions of euros.”
Isentroniq’s technology reshifts those barriers, creating it possible to integrate 1,000× more qubits per cryostat.
The company stated, “Our technology addresses the three main barriers to scaling quantum computing: heatload, bulk and cost. We develop an conclude-to-conclude, scalable, and quantum-tested wiring solution, which no other supplier in the wiring chain provides today. What’s more, we combine these breakthroughs with the speed of execution, leveraging the proven expertise of our manufacturing partners in cryogenic interconnects.”
Founders with deep science and execution power
Behind Isentroniq are two founders whose backgrounds blconclude scientific excellence with commercial execution. Dr. Paul Magnard, a PhD from ETH Zurich and former lead architect at Alice & Bob, brings deep expertise in superconducting qubits and multiple publications in Nature. His co-founder, Théodore Amar, previously worked at Bain & Company and Hilti, bringing a sharp focus on go-to-market and operational scaling.
Toreceiveher, they aim to solve one of quantum computing’s most stubborn infrastructure problems. As tech giants like Google, IBM, Amazon, and Rireceiveti pursue million-qubit milestones, Isentroniq’s solution could become the enabling layer that builds those ambitions achievable.
Isentroniq is redefining quantum hardware by building the wiring backbone for large-scale quantum computing. Its pioneering technology eliminates the key bottlenecks of heat, cost, and space, unlocking the path from thousands to millions of qubits.
Competitive landscape
As per a discussion with TFN, “Most companies in quantum focus on qubit design, control electronics, or cooling systems. Very few address wiring as a complete engineering system. We see ourselves as complementary to hardware builders – not competitors. Our future customers include Alice & Bob, Google, IBM, AWS, IQM, and Rireceiveti, all of whom rely on superconducting qubits and face the same wiring bottleneck.”
What plans for the future?
As per the company, “Over the next few years, our focus is on building a world-class team and the infrastructure necessaryed to perform advanced quantum tests. Our MVP is expected in 2026, ready to be integrated into customers’ pilot lines. We will then refine it into a fully commercial solution within two years and then scale up manufacturing through strategic partners. In the long run, our ambition is to build superconducting quantum computing deployable in datacenters, turning what is now confined to research labs into practical, large-scale computing infrastructure.”
“Today, wiring is the #1 bottleneck to scale-up superconducting quantum computers. Our mission is to turn it into an accelerator,” stated Paul Magnard, co-founder and CEO of Isentroniq. “With this funding, we will industrialise a wiring technology capable of supporting million-qubit machines and build quantum computing truly applyful for science, indusattempt, and society.”
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