The leading french quantum computing companies make France the strongest quantum nation in continental Europe, backed by a national plan worth nearly two billion euros and a physics tradition that runs from Louis de Broglie to the Nobel laureate Alain Aspect. The country fields world leaders in neutral atoms and photonics alongside bold bets on cat qubits and silicon spin. This guide profiles the companies that define the french quantum computing companies, from the flagship Pasqal to the photonic specialist Quandela, and explains how the Plan Quantique and newer national programmes shape the field.
1. France leads continental Europe. The french quantum computing companies form the deepest quantum sector in the European Union, spanning several hardware approaches and supported by strong public funding. Only the United Kingdom rivals France in Europe.
2. Pasqal is the flagship. The neutral-atom company co-founded by Nobel laureate Alain Aspect agreed a Nasdaq listing in 2026 that values it near two billion dollars, making it France’s clear quantum champion.
3. Five hardware bets. Pasqal in neutral atoms, Quandela in photonics, Alice & Bob in cat qubits, Quobly in silicon and C12 in carbon nanotubes are the five companies backed by the national PROQCIMA programme.
4. The state moved early and keeps investing. The Plan Quantique of 2021 committed close to 1.8 billion euros, and newer programmes such as PROQCIMA and HQI now buy machines and push the field toward fault tolerance.
5. The ecosystem is deep. Beyond the headline builders, the Quantum Navigator tracks 48 French quantum companies across sensing, cryogenics, software and post-quantum security.
6. The challenge is commercial scale. France excels at deep technology and public funding but, like the rest of Europe, must grow customers and late-stage capital to keep pace with the United States.
Why France is a quantum power
France combines a long tradition in fundamental physics with an unusually decisive industrial policy, and the two together explain its quantum strength. The country produced foundational quantum physics from Louis de Broglie to Serge Haroche and Alain Aspect, both Nobel laureates, and that depth still feeds its laboratories today. The science base gives French startups credibility and a steady supply of expert founders.
The second factor is the state, which moved early and at scale with a national quantum plan in 2021 that put France among the top public funders in the world. That money seeded companies, equipped laboratories and bought early machines for supercomputing centres. The result is the most complete quantum ecosystem in the European Union, and the french quantum computing companies sit at its centre.
The Plan Quantique and national funding
The Plan Quantique, announced in 2021 as part of the France 2030 investment programme, committed close to 1.8 billion euros across computing, sensing, communication and the supporting technologies. It funds research, startups and a national platform that gives users access to French and European machines. The plan made France one of the largest national backers of quantum technology outside Asia and North America.
Public research bodies channel much of that effort, and the CEA laboratories behind many French quantum computing companies sit at the heart of the system. The funding deliberately links startups to high-performance computing centres such as those run by GENCI and the European EuroHPC network. That coupling of quantum and classical supercomputing is a defining feature of the French approach.
PROQCIMA and the drive to fault tolerance
In March 2024 France launched PROQCIMA, a defence-backed programme that commits 500 million euros to build a French fault-tolerant quantum computer. It selected five companies, Alice & Bob, Pasqal, Quandela, Quobly and C12, and set them a shared target of a 128 logical-qubit demonstrator by 2030 and a machine with 2,048 logical qubits by 2035. The programme runs as a competition, narrowing to three approaches after four years and two after eight, so that public money follows whichever qubit technology proves most scalable.
A second national effort, the France Hybrid HPC Quantum Initiative known as HQI, buys real machines and places them next to supercomputers for researchers to use. Under HQI the state has agreed to acquire an Alice & Bob cat-qubit system and has installed Quandela’s photonic Lucy machine at the CEA, both coupled to the Joliot-Curie supercomputer. These programmes, alongside the annual France Quantum gathering at Station F in Paris, show how tightly the French state ties its startups to national computing infrastructure.
The top French quantum computing companies
This guide profiles the leaders among the french quantum computing companies, eight builders that span neutral atoms (Pasqal), photonics (Quandela), superconducting cat qubits (Alice & Bob), carbon-nanotube qubits (C12), silicon spin qubits (Quobly), quantum networking (Welinq), drug-discovery software (Qubit Pharmaceuticals) and high-performance computing (Eviden). They sit within a wider field that the Quantum Navigator counts at 48 French quantum companies. For the global picture, see our worldwide quantum computing companies guide and our Germany guide.
What the lineup shows
The French lineup is notable for backing several hardware approaches at once rather than concentrating on a single technology. Neutral atoms and photonics are the strongest cards, but the cat-qubit, carbon-nanotube and silicon bets give France exposure to whichever modality reaches useful scale first. That diversity, paired with deep public funding, is the signature of the French strategy.
The wider French quantum ecosystem
The eight companies above are the core hardware and software builders, but the french quantum computing companies extend well beyond them. The Quantum Navigator dataset tracks 48 French quantum technology companies, from sensing and cryogenics specialists to post-quantum security firms and large industrial groups. The names below round out that picture, grouped by what they do.
Quantum software and applications
- Aqemia uses quantum-inspired algorithms and generative AI to predict molecular properties for drug discovery.
- Dynamiqs maintains an open-source, GPU-accelerated Python library for simulating open and closed quantum systems.
- QPerfect develops a high-performance quantum emulation and circuit-optimisation platform.
- QuantFi writes quantum algorithms for the financial-services industry, and Quantum Signals combines artificial intelligence with quantum methods for financial markets.
- Perceval is Quandela’s open-source photonic-computing framework rather than a separate company.
- Atos is the parent group whose quantum activity now runs through Eviden, profiled above.
- Capgemini and TotalEnergies are large French groups exploring quantum consulting and energy-sector applications.
Enabling hardware, cryogenics and components
- NextGenQ, based in Rennes, is developing trapped-ion quantum computing hardware.
- Arago builds silicon-photonic processors aimed at energy-efficient AI acceleration.
- CryoConcept builds the dilution refrigerators that cool superconducting quantum processors.
- Isentroniq makes cryogenic wiring and interconnects for scaling superconducting systems.
- PLASSYS-BESTEK supplies the thin-film deposition equipment used to fabricate qubits.
- Radiall and Silent Waves produce cryogenic interconnects and low-noise readout electronics.
- Lytid develops terahertz sources based on quantum-cascade-laser technology, and Chipiron applies SQUID quantum-sensing to build portable, ultra-low-field MRI scanners.
Quantum sensing and timing
- Exail commercialises atom-interferometry quantum sensors for navigation and gravimetry, and now includes the pioneer Muquans.
- AUREA Technology makes quantum magnetometers, gravimeters and timing instruments.
- Orolia, now part of Safran, supplies resilient positioning, navigation and timing systems.
- SteerLight, a CEA-Leti spin-off, develops photonic sensors for lidar.
- SYRTE at the Paris Observatory runs France’s atomic time standard and optical clocks.
Post-quantum security and communications
France also fields a strong post-quantum security cluster, led by CryptoNext Security. The Paris company builds cryptographic software and hardware to protect data against future quantum computers, says it is the first European firm to gain NIST validation for all three standardised post-quantum algorithms, and has run pilots with the Banque de France.
- Thales develops quantum-safe communications and post-quantum cryptography, coordinates the RESQUE consortium and supplied the secure operating system for a post-quantum chip shown by Samsung at CES 2026.
- Thales Alenia Space works on satellite quantum key distribution.
- IDEMIA adds post-quantum cryptography to secure identity and payment devices.
- VeriQloud builds the Qline quantum-key-distribution architecture for metropolitan networks.
- QuRISK advises organisations on quantum risk and cryptographic migration.
- Orange runs quantum-key-distribution trials and quantum-safe services across its telecom network.
- Airbus Quantum develops quantum algorithms for aerospace and secure communications.
Research institutions and investors
- CEA, CNRS and Inria supply much of the science, intellectual property and founding talent behind the sector.
- The QUANTIC laboratory, a joint team of ENS-PSL, Inria, Mines Paris and CNRS, is the research group from which Alice & Bob emerged.
- Quantonation, founded in 2018, was the first venture fund dedicated to quantum technology, and Elaia is a deep-tech investor that backed Alice & Bob early.
- The European Space Agency, headquartered in Paris, runs quantum communication and sensing programmes for space, though it is an intergovernmental body rather than a French company.
French strengths in neutral atoms, photonics and cat qubits
France’s clearest leadership is in neutral atoms, where Pasqal ranks among the two or three best companies in the world and already sells machines to European supercomputing centres. Photonics is a close second through Quandela, which builds the high-quality single-photon sources that the approach depends on. Both technologies trace directly to French laboratory research that the companies commercialised.
The country also takes distinctive hardware bets that few others pursue, above all the cat qubits of Alice & Bob, which try to fix errors in the physical design rather than only in software. C12’s carbon-nanotube qubits and Quobly’s silicon spin qubits add two more manufacturable approaches. This willingness to fund several long-shot bets gives the French sector unusual technical range.
Research anchors at CEA, CNRS and Inria
The public laboratories are the source of most French quantum companies and much of their continuing research. CEA-Leti in Grenoble drives the silicon and microelectronics work behind Quobly, while CNRS laboratories across the country supply physics talent and intellectual property. Inria adds the software, algorithms and computer-science expertise that the application layer needs.
These institutions do more than publish papers, since they host shared facilities, co-develop hardware and second researchers into companies. The Grenoble cluster around CEA-Leti is a particular strength, mirroring the role of national laboratories in the United States. This pipeline keeps French startups supplied with both people and technology.
France in the European quantum landscape
Within Europe, France and Germany are the two heavyweights, and the comparison is instructive. France leans on a small number of well-funded national champions and a strong central plan, while Germany spreads its larger budget across more companies and its Fraunhofer and Max Planck institutes. Both feed into the European Union’s Quantum Flagship and the EuroHPC machines that host early quantum systems.
France also gains from the European push for technological sovereignty, which favours homegrown hardware for sensitive public and defence applications. Pasqal and Quandela have both benefited from European and national procurement that prizes local supply. That policy backdrop gives French firms a protected early market that purely commercial rivals lack.
When French companies matter for your strategy
Neutral atoms and HPC integration
If your roadmap involves running quantum workloads next to a supercomputer, the French vendors are among the most advanced partners available. Pasqal’s neutral-atom machines are already installed in European HPC centres, and Eviden connects quantum software to classical clusters through its Qaptiva platform. That hybrid model suits organisations that want to experiment without owning hardware.
Photonics and specialised qubits
For teams tracking which qubit technology reaches production, France offers a broad menu to watch in one country. Quandela’s photonics, Alice & Bob’s cat qubits and Quobly’s silicon spin qubits, which we cover in our silicon spin companies guide, each mark a different path to fault tolerance. Our explainer on what a qubit is covers how these approaches differ.
Frequently asked questions
Who are the leading French quantum computing companies in 2026?
France’s quantum sector is led by Pasqal, a world leader in neutral-atom computing co-founded by Nobel laureate Alain Aspect, and Quandela, a leader in photonic quantum computing. Other major names include Alice & Bob in superconducting cat qubits, C12 in carbon-nanotube spin qubits, Quobly in silicon spin qubits, Welinq in quantum networking, Qubit Pharmaceuticals in drug-discovery software, and Eviden, the Atos business, in quantum software and high-performance computing. Together they make France the strongest quantum nation in continental Europe.
How many quantum computing companies does France have?
France has a broad quantum sector. The Quantum Navigator dataset tracks 48 French quantum technology companies, spanning hardware builders such as Pasqal, Quandela, Alice & Bob, Quobly and C12, software and applications firms, sensing and cryogenics specialists, and post-quantum security providers. This guide profiles the leading hardware and software companies in detail and lists the wider ecosystem by category.
What is PROQCIMA?
PROQCIMA is a French government programme, launched in 2024 with 500 million euros of defence-linked funding, to build a national fault-tolerant quantum computer. It selected five companies, Alice & Bob, Pasqal, Quandela, Quobly and C12, and set targets of a 128 logical-qubit demonstrator by 2030 and a 2,048 logical-qubit machine by 2035. The programme runs as a competition that gradually narrows the field to the most scalable qubit technologies.
Is France a leader in quantum computing?
Yes, France is the leading quantum nation in continental Europe and one of the strongest in the world outside the United States and China. It combines a deep physics tradition, with Nobel laureates Alain Aspect and Serge Haroche, a national plan worth close to 1.8 billion euros, and world-class companies in neutral atoms and photonics. Its main challenge, shared across Europe, is building commercial demand and late-stage funding to match the scale available to American companies.
What is Pasqal and why does it matter?
Pasqal is France’s flagship quantum company and one of the global leaders in neutral-atom quantum computing, co-founded in 2019 by physicists including the Nobel laureate Alain Aspect. It builds processors that trap hundreds of atoms in reconfigurable arrays and has installed machines at supercomputing centres across Europe. In March 2026 Pasqal agreed to go public through a merger with Bleichroeder Acquisition Corp II on Nasdaq, a deal that values it near two billion dollars, making it the largest and most influential of the French quantum computing companies.
What is the French Plan Quantique?
The Plan Quantique is France’s national quantum strategy, announced in 2021 as part of the France 2030 investment programme, committing close to 1.8 billion euros. It funds research, startups, training and a national platform that gives users access to quantum machines, and it deliberately links quantum work to high-performance computing centres. The plan made France one of the largest public backers of quantum technology in the world and helped seed most of the companies in this guide.
What hardware approaches do French companies use?
France is unusually broad in its hardware bets for a single country. Pasqal builds neutral-atom processors, Quandela builds photonic machines around single-photon sources, and Alice & Bob develops superconducting cat qubits designed to suppress errors in hardware. C12 works on carbon-nanotube spin qubits and Quobly on silicon spin qubits made with standard chip processes, while Welinq builds the quantum memories that link processors into networks.
How does France compare with Germany in quantum?
France and Germany are the two quantum heavyweights of continental Europe, with different styles. France concentrates on a few well-funded national champions such as Pasqal and Quandela under a strong central plan, while Germany spreads a larger budget across more companies and its Fraunhofer and Max Planck institutes. Both countries feed into the European Union Quantum Flagship and the EuroHPC supercomputers that host early quantum machines, and they lead Europe together rather than one clearly dominating.
What role do CEA, CNRS and Inria play?
The public research bodies are the engine of French quantum, supplying founders, intellectual property and shared facilities. CEA-Leti in Grenoble drives the silicon and microelectronics work behind companies like Quobly, CNRS laboratories provide physics talent and research across the country, and Inria contributes software, algorithms and computer-science expertise. These institutions host equipment, co-develop hardware and move researchers into startups, keeping the companies supplied with both people and technology.
How can businesses access French quantum computers?
Most French quantum hardware is reachable through the cloud and through European supercomputing centres that host the machines. Pasqal and Quandela offer access to their systems online and have installed hardware at high-performance computing facilities, while Eviden’s Qaptiva platform lets developers build and simulate quantum programs. Many organisations start through these centres and the national platform before committing to a specific French vendor or technology.
See today’s quantum computing news on Quantum Zeitgeist for the latest breakthroughs in qubits, hardware, algorithms, and industry deals.
