Top 10 Quantum Computing Companies in France
France is building more than quantum computers. Its ecosystem connects multiple qubit architectures with networking, sensing, software, semiconductor manufacturing and specialist capital, creating a broader industrial base for future quantum technologies.
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🇫🇷 France has built one of Europe’s most diverse quantum technology ecosystems.
What stands out is that the French quantum landscape is not concentrated around a single architecture or application.
It spans neutral-atom quantum computers, cat qubits, carbon-nanotube processors, photonic computing, silicon spin qubits, quantum networking, quantum memory, quantum sensing, optimization, deep-tech investment and quantum-enabled molecular discovery.
Based exclusively on companies listed and ranked by QuantumNews on its France ecosystem page, here are the Top 10 Quantum Computing Companies in France.
France company ecosystem:
https://quantumnews.in/companies/country/france
1. Pasqal — Quantum Score: 70
Company: Pasqal
Location: Massy, France
Established: 2019
Focus: Neutral-atom quantum computing
Physical qubits listed: 324
https://quantumnews.in/company/pasqal
Pasqal currently sits at the top of the QuantumNews France ranking.
According to the QuantumNews company profile, Pasqal operates systems of up to 324 qubits and has expanded beyond laboratory development into hardware deployment and cloud availability.
The company delivered a 140-neutral-atom system to CINECA in Bologna, where the system was integrated with the Leonardo pre-exascale EuroHPC supercomputer. It has also deployed a 200-qubit system at Saudi Aramco's Dhahran data centre.
Pasqal's systems are represented across several cloud-access models, including Quantum-as-a-Service deployments, while its partnerships span industrial applications ranging from energy modelling and EV charging optimisation to materials analysis.
The company has also laid out a roadmap toward 1,000-qubit systems, reflecting its push from experimental neutral-atom platforms toward larger-scale commercial quantum computing.
Pasqal represents one of France's clearest attempts to build a globally competitive full-stack quantum hardware company.
2. Alice & Bob — Quantum Score: 60
Company: Alice & Bob
Location: Paris, France
Established: 2020
Focus: Fault-tolerant quantum computing / cat qubits
Physical qubits listed: 16
https://quantumnews.in/company/alice-and-bob
Alice & Bob is pursuing a fundamentally different route toward fault-tolerant quantum computing.
The idea is important because quantum error correction is one of the largest barriers to useful quantum computing. If the underlying physical qubits naturally suppress certain errors, substantially fewer physical qubits may be needed to create reliable logical qubits.
According to the QuantumNews profile, Alice & Bob has demonstrated significant improvements in cat-qubit bit-flip lifetime and developed error-correction approaches including Elevator Codes and the Heart Code magic-state preparation protocol.
The company opened a €50 million quantum cleanroom in Paris and has set a long-term objective of delivering an industrially useful fault-tolerant quantum computer by 2030.
Its technology development combines superconducting quantum hardware with an explicit emphasis on reducing the enormous error-correction overhead expected in large quantum computers.
That focus makes Alice & Bob one of the most distinctive hardware companies in the French ecosystem.
3. C12 — Quantum Score: 60
Company: C12
Location: Paris, France
Established: 2020
Focus: Carbon-nanotube quantum processors
Physical qubits listed: 6
https://quantumnews.in/company/c12
C12 is taking yet another hardware route: carbon nanotubes as qubits.
QuantumNews reports that C12 achieved coherence times of 1.3 microseconds, exceeding silicon quantum dots by 100× according to the company profile, and has produced a five-qubit chip with expected gate fidelities above 99%.
Its roadmap points toward systems containing 50 or more qubits between 2027 and 2030.
C12 is also building the surrounding development ecosystem required for researchers and developers to work with its architecture. Its Callisto digital twin models carbon-nanotube quantum processors with realistic noise characteristics, allowing algorithms and circuits to be explored before being executed on physical systems.
The company operates its own Quantum Fab in Paris, giving it dedicated quantum processor production capabilities.
C12 therefore represents an important part of France's architectural diversity: instead of competing only within superconducting or neutral-atom systems, it is attempting to establish carbon nanotubes as another scalable path toward quantum processing.
4. Quandela — Quantum Score: 55
Company: Quandela
Location: Paris, France
Established: 2017
Focus: Photonic quantum computing
Physical qubits listed: 12
https://quantumnews.in/company/quandela
Quandela is one of France's most prominent photonic quantum computing companies.
Photonic quantum computing uses individual particles of light as carriers of quantum information, creating a very different engineering pathway from superconducting circuits, trapped ions or neutral atoms.
According to QuantumNews, Quandela delivered its 12-qubit Lucy photonic system to the French Alternative Energies and Atomic Energy Commission, with the system installed at the TGCC under EuroHPC.
The architecture is expected to scale toward 24 qubits, while Quandela has also developed cloud-accessible systems and quantum machine-learning technologies.
The company's MerLin quantum machine-learning platform is another important part of its strategy, bringing photonic quantum computing together with software frameworks and GPU acceleration.
Quandela's presence in France demonstrates that the country's hardware ecosystem is not betting on one qubit modality. France has companies pursuing neutral atoms, cat qubits, carbon nanotubes, silicon spins and photons simultaneously.
5. Quobly — Quantum Score: 55
Company: Quobly
Location: Grenoble, France
Established: 2022
Focus: Silicon spin qubits
Physical qubits listed: 100
https://quantumnews.in/company/quobly
Quobly is pursuing perhaps the architecture most closely connected to the existing semiconductor manufacturing industry: silicon spin qubits.
Its quantum chips use 28nm FDSOI silicon, a semiconductor process already used in commercial electronics.
That manufacturing connection is central to Quobly's positioning.
Rather than creating an entirely separate fabrication ecosystem for quantum computing, silicon spin-qubit systems could potentially take advantage of techniques, equipment and manufacturing knowledge already developed by the semiconductor industry.
QuantumNews reports that Quobly is working with STMicroelectronics CMOS fabrication and that isotopically enriched silicon wafers have entered STMicroelectronics' 300mm production line in Crolles.
Quobly has also developed a GPU-accelerated quantum emulator and is working on technologies surrounding quantum error correction and post-quantum security.
The company's inclusion near the top of the ranking highlights Grenoble's role alongside Paris and Massy as another important centre of France's quantum hardware ecosystem.
6. Arago — Quantum Score: 40
Company: Arago
Location: Paris, France
Established: 2024
Funding listed: $26 million
Focus: Photonic computing / AI acceleration
https://quantumnews.in/company/arago
Arago sits at the intersection of photonics and high-performance AI computing.
Its approach combines silicon photonics and free-space optics to build computing accelerators designed for AI workloads.
Instead of moving electrical signals through conventional GPU architectures, photonic computing uses light to perform certain mathematical operations.
QuantumNews describes Arago's objective as delivering significantly lower energy consumption than traditional GPU computing, particularly for matrix operations central to AI inference.
The company also provides a PyTorch-compatible software stack called CARLOTA, designed to make its photonic hardware usable within existing machine-learning workflows.
Arago is therefore somewhat different from companies building universal quantum processors, but its position within the QuantumNews France ranking illustrates the increasingly broad overlap between quantum photonics, advanced computing and next-generation semiconductor architectures.
7. Quantonation — Quantum Score: 35
Company: Quantonation
Location: Paris, France
Established: 2018
Focus: Quantum technology investment
https://quantumnews.in/company/quantonation
Quantonation plays a different but highly consequential role in France's quantum ecosystem.
Founded in Paris in 2018 by Charles Beigbeder and Christophe Jurczak, Quantonation invests across quantum computing hardware and software, quantum networks, quantum sensing and deep physics.
Its importance lies in the financing infrastructure required to turn university research and laboratory breakthroughs into commercial companies.
QuantumNews reports that its first fund raised €91 million and invested in 27 companies globally.
Its second fund subsequently reached €220 million, giving Quantonation substantial capital dedicated specifically to quantum and physics-based deep technology.
A mature quantum ecosystem requires more than researchers and engineering teams. It also requires investors capable of understanding unusually long development cycles, specialised scientific risk and capital-intensive hardware.
Quantonation fills that role within France while investing across the wider global quantum ecosystem.
8. Welinq — Quantum Score: 35
Company: Welinq
Location: Paris, France
Established: 2022
Focus: Quantum memory and distributed quantum computing
https://quantumnews.in/company/welinq
Welinq is working on one of the critical technologies required for a future quantum internet: quantum memory.
According to QuantumNews, its technology has demonstrated more than 90% efficiency and storage times of around 200 microseconds, while remaining compatible with telecom C-band infrastructure.
The company describes its technology as a kind of "quantum Ethernet port" — infrastructure capable of linking otherwise independent quantum processors using photonic connections.
That could become increasingly important as quantum systems scale.
Rather than constructing a single computer containing every required qubit, future architectures may connect multiple quantum processors through quantum networks.
Welinq is also developing software for this distributed model.
Its AraQne compiler is designed to partition large quantum algorithms across connected quantum processing units.
The company is therefore tackling both the physical networking layer and the software orchestration layer required for distributed quantum computing.
9. AUREA Technology — Quantum Score: 30
Company: AUREA Technology
Location: Paris, France
Established: 2014
Focus: Quantum sensing and measurement
https://quantumnews.in/company/aurea-technology
AUREA Technology represents the quantum sensing and precision measurement side of France's ecosystem.
Its technologies include atomic magnetometers, quantum gravimeters and precision timing systems, combining atomic physics, optical technologies and precision engineering.
Quantum sensing is an important part of the wider quantum technology landscape because commercial applications do not depend exclusively on universal quantum computers.
Quantum effects can also dramatically improve how accurately magnetic fields, gravity, time, position and other physical quantities are measured.
According to the QuantumNews profile, AUREA's systems target applications including geophysical surveying, fundamental physics, navigation and industrial monitoring.
Its position in the France ranking reinforces how broad the country's quantum ecosystem has become: processors, networks, software and sensing technologies are advancing alongside one another.
10. Aqemia — Quantum Score: 30
Company: Aqemia
Location: Paris, France
Established: 2019
Focus: Physics-driven drug discovery
https://quantumnews.in/company/aqemia
Aqemia brings advanced computational physics into drug discovery.
According to QuantumNews, Aqemia's approach models molecular behaviour using the physical laws governing molecular interactions rather than depending entirely on experimentally generated training datasets.
The company reports that its platform can explore molecules substantially faster than conventional approaches.
Aqemia has also built collaborations with major pharmaceutical companies and has developed cancer-targeting drug candidates that progressed into preclinical testing.
Its inclusion in France's top ten demonstrates another important dimension of quantum technology development: value will not come only from building quantum machines.
Algorithms derived from quantum mechanics, computational chemistry and physics-based modelling are already being applied to major industrial problems such as pharmaceutical discovery.
The bigger picture
The strongest feature of France's quantum ecosystem is architectural diversity.
At the top of the QuantumNews ranking alone, France has:
⚛️ Neutral atoms — Pasqal
🐱 Cat qubits — Alice & Bob
🧬 Carbon-nanotube qubits — C12
💡 Photonic quantum computing — Quandela
💻 Silicon spin qubits — Quobly
🔬 Photonic computing — Arago
💰 Quantum investment infrastructure — Quantonation
🌐 Quantum memory and networking — Welinq
📡 Quantum sensing — AUREA Technology
💊 Quantum-inspired molecular modelling — Aqemia
This is what makes the French ecosystem particularly interesting.
France is not simply trying to produce another quantum processor.
It is assembling multiple layers of a future quantum economy — processors, fabrication, software, networking, memory, sensing, applications and specialised investment capital.
And the competition inside France itself is technologically diverse enough that several very different quantum architectures are being developed in parallel.
Explore the complete France quantum ecosystem and company rankings on QuantumNews:
https://quantumnews.in/companies/country/france
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